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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2009-08-28 01:00:20 -0400
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-08-28 01:00:20 -0400
commit4b61bb575b1fb42ab1df228ae7812e5135f656da (patch)
tree03456466e6f678456ea462a7da4b352d1aa03aa3 /arch/x86
parent805423e84e900e56c834aadee61a020b0d5092c3 (diff)
parent326ba5010a5429a5a528b268b36a5900d4ab0eba (diff)
Merge commit 'v2.6.31-rc8' into next
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Kconfig2
-rw-r--r--arch/x86/boot/compressed/Makefile2
-rw-r--r--arch/x86/include/asm/efi.h5
-rw-r--r--arch/x86/include/asm/irqflags.h8
-rw-r--r--arch/x86/include/asm/lguest.h3
-rw-r--r--arch/x86/include/asm/lguest_hcall.h18
-rw-r--r--arch/x86/include/asm/pgalloc.h25
-rw-r--r--arch/x86/include/asm/pgtable.h12
-rw-r--r--arch/x86/include/asm/uaccess.h4
-rw-r--r--arch/x86/include/asm/uaccess_64.h10
-rw-r--r--arch/x86/include/asm/uv/uv_bau.h2
-rw-r--r--arch/x86/include/asm/uv/uv_hub.h9
-rw-r--r--arch/x86/kernel/apic/io_apic.c3
-rw-r--r--arch/x86/kernel/apic/ipi.c3
-rw-r--r--arch/x86/kernel/apic/x2apic_cluster.c10
-rw-r--r--arch/x86/kernel/apic/x2apic_phys.c10
-rw-r--r--arch/x86/kernel/apic/x2apic_uv_x.c42
-rw-r--r--arch/x86/kernel/apm_32.c2
-rw-r--r--arch/x86/kernel/cpu/Makefile4
-rw-r--r--arch/x86/kernel/cpu/amd.c9
-rw-r--r--arch/x86/kernel/cpu/common.c48
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c25
-rw-r--r--arch/x86/kernel/cpu/mcheck/therm_throt.c23
-rw-r--r--arch/x86/kernel/cpu/perf_counter.c40
-rw-r--r--arch/x86/kernel/efi.c4
-rw-r--r--arch/x86/kernel/efi_64.c6
-rw-r--r--arch/x86/kernel/head_32.S6
-rw-r--r--arch/x86/kernel/irqinit.c2
-rw-r--r--arch/x86/kernel/mfgpt_32.c2
-rw-r--r--arch/x86/kernel/process.c6
-rw-r--r--arch/x86/kernel/reboot.c50
-rw-r--r--arch/x86/kernel/setup.c13
-rw-r--r--arch/x86/kernel/setup_percpu.c14
-rw-r--r--arch/x86/kernel/tlb_uv.c1
-rw-r--r--arch/x86/kernel/tsc.c29
-rw-r--r--arch/x86/kernel/vmi_32.c2
-rw-r--r--arch/x86/kernel/vmlinux.lds.S147
-rw-r--r--arch/x86/kvm/i8254.c3
-rw-r--r--arch/x86/kvm/mmu.c48
-rw-r--r--arch/x86/kvm/svm.c6
-rw-r--r--arch/x86/kvm/vmx.c6
-rw-r--r--arch/x86/kvm/x86.c44
-rw-r--r--arch/x86/lguest/boot.c509
-rw-r--r--arch/x86/lguest/i386_head.S112
-rw-r--r--arch/x86/lib/msr.c26
-rw-r--r--arch/x86/mm/highmem_32.c1
-rw-r--r--arch/x86/mm/init_64.c2
-rw-r--r--arch/x86/mm/pageattr.c39
-rw-r--r--arch/x86/mm/pat.c3
-rw-r--r--arch/x86/mm/pgtable.c7
-rw-r--r--arch/x86/mm/srat_64.c6
-rw-r--r--arch/x86/mm/tlb.c21
-rw-r--r--arch/x86/xen/Makefile4
-rw-r--r--arch/x86/xen/enlighten.c22
54 files changed, 933 insertions, 527 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 738bdc6b0f8b..13ffa5df37d7 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -24,6 +24,7 @@ config X86
24 select HAVE_UNSTABLE_SCHED_CLOCK 24 select HAVE_UNSTABLE_SCHED_CLOCK
25 select HAVE_IDE 25 select HAVE_IDE
26 select HAVE_OPROFILE 26 select HAVE_OPROFILE
27 select HAVE_PERF_COUNTERS if (!M386 && !M486)
27 select HAVE_IOREMAP_PROT 28 select HAVE_IOREMAP_PROT
28 select HAVE_KPROBES 29 select HAVE_KPROBES
29 select ARCH_WANT_OPTIONAL_GPIOLIB 30 select ARCH_WANT_OPTIONAL_GPIOLIB
@@ -742,7 +743,6 @@ config X86_UP_IOAPIC
742config X86_LOCAL_APIC 743config X86_LOCAL_APIC
743 def_bool y 744 def_bool y
744 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC 745 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
745 select HAVE_PERF_COUNTERS if (!M386 && !M486)
746 746
747config X86_IO_APIC 747config X86_IO_APIC
748 def_bool y 748 def_bool y
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index e2ff504b4ddc..f8ed0658404c 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -4,7 +4,7 @@
4# create a compressed vmlinux image from the original vmlinux 4# create a compressed vmlinux image from the original vmlinux
5# 5#
6 6
7targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o 7targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o
8 8
9KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2 9KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
10KBUILD_CFLAGS += -fno-strict-aliasing -fPIC 10KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index edc90f23e708..8406ed7f9926 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -33,7 +33,7 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...);
33#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \ 33#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
34 efi_call_virt(f, a1, a2, a3, a4, a5, a6) 34 efi_call_virt(f, a1, a2, a3, a4, a5, a6)
35 35
36#define efi_ioremap(addr, size) ioremap_cache(addr, size) 36#define efi_ioremap(addr, size, type) ioremap_cache(addr, size)
37 37
38#else /* !CONFIG_X86_32 */ 38#else /* !CONFIG_X86_32 */
39 39
@@ -84,7 +84,8 @@ extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
84 efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \ 84 efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
85 (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6)) 85 (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
86 86
87extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size); 87extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
88 u32 type);
88 89
89#endif /* CONFIG_X86_32 */ 90#endif /* CONFIG_X86_32 */
90 91
diff --git a/arch/x86/include/asm/irqflags.h b/arch/x86/include/asm/irqflags.h
index 2bdab21f0898..c6ccbe7e81ad 100644
--- a/arch/x86/include/asm/irqflags.h
+++ b/arch/x86/include/asm/irqflags.h
@@ -12,9 +12,15 @@ static inline unsigned long native_save_fl(void)
12{ 12{
13 unsigned long flags; 13 unsigned long flags;
14 14
15 /*
16 * Note: this needs to be "=r" not "=rm", because we have the
17 * stack offset from what gcc expects at the time the "pop" is
18 * executed, and so a memory reference with respect to the stack
19 * would end up using the wrong address.
20 */
15 asm volatile("# __raw_save_flags\n\t" 21 asm volatile("# __raw_save_flags\n\t"
16 "pushf ; pop %0" 22 "pushf ; pop %0"
17 : "=g" (flags) 23 : "=r" (flags)
18 : /* no input */ 24 : /* no input */
19 : "memory"); 25 : "memory");
20 26
diff --git a/arch/x86/include/asm/lguest.h b/arch/x86/include/asm/lguest.h
index 313389cd50d2..5136dad57cbb 100644
--- a/arch/x86/include/asm/lguest.h
+++ b/arch/x86/include/asm/lguest.h
@@ -17,8 +17,7 @@
17/* Pages for switcher itself, then two pages per cpu */ 17/* Pages for switcher itself, then two pages per cpu */
18#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * nr_cpu_ids) 18#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * nr_cpu_ids)
19 19
20/* We map at -4M (-2M when PAE is activated) for ease of mapping 20/* We map at -4M (-2M for PAE) for ease of mapping (one PTE page). */
21 * into the guest (one PTE page). */
22#ifdef CONFIG_X86_PAE 21#ifdef CONFIG_X86_PAE
23#define SWITCHER_ADDR 0xFFE00000 22#define SWITCHER_ADDR 0xFFE00000
24#else 23#else
diff --git a/arch/x86/include/asm/lguest_hcall.h b/arch/x86/include/asm/lguest_hcall.h
index 33600a66755f..ba0eed8aa1a6 100644
--- a/arch/x86/include/asm/lguest_hcall.h
+++ b/arch/x86/include/asm/lguest_hcall.h
@@ -30,27 +30,27 @@
30#include <asm/hw_irq.h> 30#include <asm/hw_irq.h>
31#include <asm/kvm_para.h> 31#include <asm/kvm_para.h>
32 32
33/*G:030 But first, how does our Guest contact the Host to ask for privileged 33/*G:030
34 * But first, how does our Guest contact the Host to ask for privileged
34 * operations? There are two ways: the direct way is to make a "hypercall", 35 * operations? There are two ways: the direct way is to make a "hypercall",
35 * to make requests of the Host Itself. 36 * to make requests of the Host Itself.
36 * 37 *
37 * We use the KVM hypercall mechanism. Seventeen hypercalls are 38 * We use the KVM hypercall mechanism, though completely different hypercall
38 * available: the hypercall number is put in the %eax register, and the 39 * numbers. Seventeen hypercalls are available: the hypercall number is put in
39 * arguments (when required) are placed in %ebx, %ecx, %edx and %esi. 40 * the %eax register, and the arguments (when required) are placed in %ebx,
40 * If a return value makes sense, it's returned in %eax. 41 * %ecx, %edx and %esi. If a return value makes sense, it's returned in %eax.
41 * 42 *
42 * Grossly invalid calls result in Sudden Death at the hands of the vengeful 43 * Grossly invalid calls result in Sudden Death at the hands of the vengeful
43 * Host, rather than returning failure. This reflects Winston Churchill's 44 * Host, rather than returning failure. This reflects Winston Churchill's
44 * definition of a gentleman: "someone who is only rude intentionally". */ 45 * definition of a gentleman: "someone who is only rude intentionally".
45/*:*/ 46:*/
46 47
47/* Can't use our min() macro here: needs to be a constant */ 48/* Can't use our min() macro here: needs to be a constant */
48#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32) 49#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32)
49 50
50#define LHCALL_RING_SIZE 64 51#define LHCALL_RING_SIZE 64
51struct hcall_args { 52struct hcall_args {
52 /* These map directly onto eax, ebx, ecx, edx and esi 53 /* These map directly onto eax/ebx/ecx/edx/esi in struct lguest_regs */
53 * in struct lguest_regs */
54 unsigned long arg0, arg1, arg2, arg3, arg4; 54 unsigned long arg0, arg1, arg2, arg3, arg4;
55}; 55};
56 56
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h
index dd14c54ac718..0e8c2a0fd922 100644
--- a/arch/x86/include/asm/pgalloc.h
+++ b/arch/x86/include/asm/pgalloc.h
@@ -46,7 +46,13 @@ static inline void pte_free(struct mm_struct *mm, struct page *pte)
46 __free_page(pte); 46 __free_page(pte);
47} 47}
48 48
49extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte); 49extern void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
50
51static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte,
52 unsigned long address)
53{
54 ___pte_free_tlb(tlb, pte);
55}
50 56
51static inline void pmd_populate_kernel(struct mm_struct *mm, 57static inline void pmd_populate_kernel(struct mm_struct *mm,
52 pmd_t *pmd, pte_t *pte) 58 pmd_t *pmd, pte_t *pte)
@@ -78,7 +84,13 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
78 free_page((unsigned long)pmd); 84 free_page((unsigned long)pmd);
79} 85}
80 86
81extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd); 87extern void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
88
89static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
90 unsigned long adddress)
91{
92 ___pmd_free_tlb(tlb, pmd);
93}
82 94
83#ifdef CONFIG_X86_PAE 95#ifdef CONFIG_X86_PAE
84extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); 96extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
@@ -108,7 +120,14 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
108 free_page((unsigned long)pud); 120 free_page((unsigned long)pud);
109} 121}
110 122
111extern void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud); 123extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
124
125static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
126 unsigned long address)
127{
128 ___pud_free_tlb(tlb, pud);
129}
130
112#endif /* PAGETABLE_LEVELS > 3 */ 131#endif /* PAGETABLE_LEVELS > 3 */
113#endif /* PAGETABLE_LEVELS > 2 */ 132#endif /* PAGETABLE_LEVELS > 2 */
114 133
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 3cc06e3fceb8..16748077559a 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -2,6 +2,7 @@
2#define _ASM_X86_PGTABLE_H 2#define _ASM_X86_PGTABLE_H
3 3
4#include <asm/page.h> 4#include <asm/page.h>
5#include <asm/e820.h>
5 6
6#include <asm/pgtable_types.h> 7#include <asm/pgtable_types.h>
7 8
@@ -269,10 +270,17 @@ static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
269 270
270#define canon_pgprot(p) __pgprot(massage_pgprot(p)) 271#define canon_pgprot(p) __pgprot(massage_pgprot(p))
271 272
272static inline int is_new_memtype_allowed(unsigned long flags, 273static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,
273 unsigned long new_flags) 274 unsigned long flags,
275 unsigned long new_flags)
274{ 276{
275 /* 277 /*
278 * PAT type is always WB for ISA. So no need to check.
279 */
280 if (is_ISA_range(paddr, paddr + size - 1))
281 return 1;
282
283 /*
276 * Certain new memtypes are not allowed with certain 284 * Certain new memtypes are not allowed with certain
277 * requested memtype: 285 * requested memtype:
278 * - request is uncached, return cannot be write-back 286 * - request is uncached, return cannot be write-back
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 20e6a795e160..d2c6c930b491 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -212,9 +212,9 @@ extern int __get_user_bad(void);
212 : "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx") 212 : "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
213#else 213#else
214#define __put_user_asm_u64(x, ptr, retval, errret) \ 214#define __put_user_asm_u64(x, ptr, retval, errret) \
215 __put_user_asm(x, ptr, retval, "q", "", "Zr", errret) 215 __put_user_asm(x, ptr, retval, "q", "", "er", errret)
216#define __put_user_asm_ex_u64(x, addr) \ 216#define __put_user_asm_ex_u64(x, addr) \
217 __put_user_asm_ex(x, addr, "q", "", "Zr") 217 __put_user_asm_ex(x, addr, "q", "", "er")
218#define __put_user_x8(x, ptr, __ret_pu) __put_user_x(8, x, ptr, __ret_pu) 218#define __put_user_x8(x, ptr, __ret_pu) __put_user_x(8, x, ptr, __ret_pu)
219#endif 219#endif
220 220
diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 8cc687326eb8..db24b215fc50 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -88,11 +88,11 @@ int __copy_to_user(void __user *dst, const void *src, unsigned size)
88 ret, "l", "k", "ir", 4); 88 ret, "l", "k", "ir", 4);
89 return ret; 89 return ret;
90 case 8:__put_user_asm(*(u64 *)src, (u64 __user *)dst, 90 case 8:__put_user_asm(*(u64 *)src, (u64 __user *)dst,
91 ret, "q", "", "ir", 8); 91 ret, "q", "", "er", 8);
92 return ret; 92 return ret;
93 case 10: 93 case 10:
94 __put_user_asm(*(u64 *)src, (u64 __user *)dst, 94 __put_user_asm(*(u64 *)src, (u64 __user *)dst,
95 ret, "q", "", "ir", 10); 95 ret, "q", "", "er", 10);
96 if (unlikely(ret)) 96 if (unlikely(ret))
97 return ret; 97 return ret;
98 asm("":::"memory"); 98 asm("":::"memory");
@@ -101,12 +101,12 @@ int __copy_to_user(void __user *dst, const void *src, unsigned size)
101 return ret; 101 return ret;
102 case 16: 102 case 16:
103 __put_user_asm(*(u64 *)src, (u64 __user *)dst, 103 __put_user_asm(*(u64 *)src, (u64 __user *)dst,
104 ret, "q", "", "ir", 16); 104 ret, "q", "", "er", 16);
105 if (unlikely(ret)) 105 if (unlikely(ret))
106 return ret; 106 return ret;
107 asm("":::"memory"); 107 asm("":::"memory");
108 __put_user_asm(1[(u64 *)src], 1 + (u64 __user *)dst, 108 __put_user_asm(1[(u64 *)src], 1 + (u64 __user *)dst,
109 ret, "q", "", "ir", 8); 109 ret, "q", "", "er", 8);
110 return ret; 110 return ret;
111 default: 111 default:
112 return copy_user_generic((__force void *)dst, src, size); 112 return copy_user_generic((__force void *)dst, src, size);
@@ -157,7 +157,7 @@ int __copy_in_user(void __user *dst, const void __user *src, unsigned size)
157 ret, "q", "", "=r", 8); 157 ret, "q", "", "=r", 8);
158 if (likely(!ret)) 158 if (likely(!ret))
159 __put_user_asm(tmp, (u64 __user *)dst, 159 __put_user_asm(tmp, (u64 __user *)dst,
160 ret, "q", "", "ir", 8); 160 ret, "q", "", "er", 8);
161 return ret; 161 return ret;
162 } 162 }
163 default: 163 default:
diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h
index bddd44f2f0ab..80e2984f521c 100644
--- a/arch/x86/include/asm/uv/uv_bau.h
+++ b/arch/x86/include/asm/uv/uv_bau.h
@@ -133,7 +133,7 @@ struct bau_msg_payload {
133 * see table 4.2.3.0.1 in broacast_assist spec. 133 * see table 4.2.3.0.1 in broacast_assist spec.
134 */ 134 */
135struct bau_msg_header { 135struct bau_msg_header {
136 unsigned int dest_subnodeid:6; /* must be zero */ 136 unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */
137 /* bits 5:0 */ 137 /* bits 5:0 */
138 unsigned int base_dest_nodeid:15; /* nasid>>1 (pnode) of */ 138 unsigned int base_dest_nodeid:15; /* nasid>>1 (pnode) of */
139 /* bits 20:6 */ /* first bit in node_map */ 139 /* bits 20:6 */ /* first bit in node_map */
diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index 341070f7ad5c..77a68505419a 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -175,7 +175,7 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
175#define UV_GLOBAL_MMR32_PNODE_BITS(p) ((p) << (UV_GLOBAL_MMR32_PNODE_SHIFT)) 175#define UV_GLOBAL_MMR32_PNODE_BITS(p) ((p) << (UV_GLOBAL_MMR32_PNODE_SHIFT))
176 176
177#define UV_GLOBAL_MMR64_PNODE_BITS(p) \ 177#define UV_GLOBAL_MMR64_PNODE_BITS(p) \
178 ((unsigned long)(UV_PNODE_TO_GNODE(p)) << UV_GLOBAL_MMR64_PNODE_SHIFT) 178 (((unsigned long)(p)) << UV_GLOBAL_MMR64_PNODE_SHIFT)
179 179
180#define UV_APIC_PNODE_SHIFT 6 180#define UV_APIC_PNODE_SHIFT 6
181 181
@@ -327,6 +327,7 @@ struct uv_blade_info {
327 unsigned short nr_possible_cpus; 327 unsigned short nr_possible_cpus;
328 unsigned short nr_online_cpus; 328 unsigned short nr_online_cpus;
329 unsigned short pnode; 329 unsigned short pnode;
330 short memory_nid;
330}; 331};
331extern struct uv_blade_info *uv_blade_info; 332extern struct uv_blade_info *uv_blade_info;
332extern short *uv_node_to_blade; 333extern short *uv_node_to_blade;
@@ -363,6 +364,12 @@ static inline int uv_blade_to_pnode(int bid)
363 return uv_blade_info[bid].pnode; 364 return uv_blade_info[bid].pnode;
364} 365}
365 366
367/* Nid of memory node on blade. -1 if no blade-local memory */
368static inline int uv_blade_to_memory_nid(int bid)
369{
370 return uv_blade_info[bid].memory_nid;
371}
372
366/* Determine the number of possible cpus on a blade */ 373/* Determine the number of possible cpus on a blade */
367static inline int uv_blade_nr_possible_cpus(int bid) 374static inline int uv_blade_nr_possible_cpus(int bid)
368{ 375{
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 2284a4812b68..d2ed6c5ddc80 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3793,6 +3793,9 @@ int arch_enable_uv_irq(char *irq_name, unsigned int irq, int cpu, int mmr_blade,
3793 mmr_pnode = uv_blade_to_pnode(mmr_blade); 3793 mmr_pnode = uv_blade_to_pnode(mmr_blade);
3794 uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value); 3794 uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
3795 3795
3796 if (cfg->move_in_progress)
3797 send_cleanup_vector(cfg);
3798
3796 return irq; 3799 return irq;
3797} 3800}
3798 3801
diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index dbf5445727a9..6ef00ba4c886 100644
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -106,6 +106,9 @@ void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
106 unsigned long mask = cpumask_bits(cpumask)[0]; 106 unsigned long mask = cpumask_bits(cpumask)[0];
107 unsigned long flags; 107 unsigned long flags;
108 108
109 if (WARN_ONCE(!mask, "empty IPI mask"))
110 return;
111
109 local_irq_save(flags); 112 local_irq_save(flags);
110 WARN_ON(mask & ~cpumask_bits(cpu_online_mask)[0]); 113 WARN_ON(mask & ~cpumask_bits(cpu_online_mask)[0]);
111 __default_send_IPI_dest_field(mask, vector, apic->dest_logical); 114 __default_send_IPI_dest_field(mask, vector, apic->dest_logical);
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 8e4cbb255c38..a5371ec36776 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -17,11 +17,13 @@ static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
17 return x2apic_enabled(); 17 return x2apic_enabled();
18} 18}
19 19
20/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */ 20/*
21 21 * need to use more than cpu 0, because we need more vectors when
22 * MSI-X are used.
23 */
22static const struct cpumask *x2apic_target_cpus(void) 24static const struct cpumask *x2apic_target_cpus(void)
23{ 25{
24 return cpumask_of(0); 26 return cpu_online_mask;
25} 27}
26 28
27/* 29/*
@@ -170,7 +172,7 @@ static unsigned long set_apic_id(unsigned int id)
170 172
171static int x2apic_cluster_phys_pkg_id(int initial_apicid, int index_msb) 173static int x2apic_cluster_phys_pkg_id(int initial_apicid, int index_msb)
172{ 174{
173 return current_cpu_data.initial_apicid >> index_msb; 175 return initial_apicid >> index_msb;
174} 176}
175 177
176static void x2apic_send_IPI_self(int vector) 178static void x2apic_send_IPI_self(int vector)
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index a284359627e7..a8989aadc99a 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -27,11 +27,13 @@ static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
27 return 0; 27 return 0;
28} 28}
29 29
30/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */ 30/*
31 31 * need to use more than cpu 0, because we need more vectors when
32 * MSI-X are used.
33 */
32static const struct cpumask *x2apic_target_cpus(void) 34static const struct cpumask *x2apic_target_cpus(void)
33{ 35{
34 return cpumask_of(0); 36 return cpu_online_mask;
35} 37}
36 38
37static void x2apic_vector_allocation_domain(int cpu, struct cpumask *retmask) 39static void x2apic_vector_allocation_domain(int cpu, struct cpumask *retmask)
@@ -162,7 +164,7 @@ static unsigned long set_apic_id(unsigned int id)
162 164
163static int x2apic_phys_pkg_id(int initial_apicid, int index_msb) 165static int x2apic_phys_pkg_id(int initial_apicid, int index_msb)
164{ 166{
165 return current_cpu_data.initial_apicid >> index_msb; 167 return initial_apicid >> index_msb;
166} 168}
167 169
168static void x2apic_send_IPI_self(int vector) 170static void x2apic_send_IPI_self(int vector)
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 096d19aea2f7..601159374e87 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -46,7 +46,7 @@ static int early_get_nodeid(void)
46 return node_id.s.node_id; 46 return node_id.s.node_id;
47} 47}
48 48
49static int uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 49static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
50{ 50{
51 if (!strcmp(oem_id, "SGI")) { 51 if (!strcmp(oem_id, "SGI")) {
52 if (!strcmp(oem_table_id, "UVL")) 52 if (!strcmp(oem_table_id, "UVL"))
@@ -253,7 +253,7 @@ static void uv_send_IPI_self(int vector)
253 apic_write(APIC_SELF_IPI, vector); 253 apic_write(APIC_SELF_IPI, vector);
254} 254}
255 255
256struct apic apic_x2apic_uv_x = { 256struct apic __refdata apic_x2apic_uv_x = {
257 257
258 .name = "UV large system", 258 .name = "UV large system",
259 .probe = NULL, 259 .probe = NULL,
@@ -261,7 +261,7 @@ struct apic apic_x2apic_uv_x = {
261 .apic_id_registered = uv_apic_id_registered, 261 .apic_id_registered = uv_apic_id_registered,
262 262
263 .irq_delivery_mode = dest_Fixed, 263 .irq_delivery_mode = dest_Fixed,
264 .irq_dest_mode = 1, /* logical */ 264 .irq_dest_mode = 0, /* physical */
265 265
266 .target_cpus = uv_target_cpus, 266 .target_cpus = uv_target_cpus,
267 .disable_esr = 0, 267 .disable_esr = 0,
@@ -362,12 +362,6 @@ static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
362 BUG(); 362 BUG();
363} 363}
364 364
365static __init void map_low_mmrs(void)
366{
367 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
368 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
369}
370
371enum map_type {map_wb, map_uc}; 365enum map_type {map_wb, map_uc};
372 366
373static __init void map_high(char *id, unsigned long base, int shift, 367static __init void map_high(char *id, unsigned long base, int shift,
@@ -395,26 +389,6 @@ static __init void map_gru_high(int max_pnode)
395 map_high("GRU", gru.s.base, shift, max_pnode, map_wb); 389 map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
396} 390}
397 391
398static __init void map_config_high(int max_pnode)
399{
400 union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
401 int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;
402
403 cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
404 if (cfg.s.enable)
405 map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
406}
407
408static __init void map_mmr_high(int max_pnode)
409{
410 union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
411 int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
412
413 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
414 if (mmr.s.enable)
415 map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
416}
417
418static __init void map_mmioh_high(int max_pnode) 392static __init void map_mmioh_high(int max_pnode)
419{ 393{
420 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh; 394 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
@@ -566,8 +540,6 @@ void __init uv_system_init(void)
566 unsigned long mmr_base, present, paddr; 540 unsigned long mmr_base, present, paddr;
567 unsigned short pnode_mask; 541 unsigned short pnode_mask;
568 542
569 map_low_mmrs();
570
571 m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG); 543 m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
572 m_val = m_n_config.s.m_skt; 544 m_val = m_n_config.s.m_skt;
573 n_val = m_n_config.s.n_skt; 545 n_val = m_n_config.s.n_skt;
@@ -591,6 +563,8 @@ void __init uv_system_init(void)
591 bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades(); 563 bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
592 uv_blade_info = kmalloc(bytes, GFP_KERNEL); 564 uv_blade_info = kmalloc(bytes, GFP_KERNEL);
593 BUG_ON(!uv_blade_info); 565 BUG_ON(!uv_blade_info);
566 for (blade = 0; blade < uv_num_possible_blades(); blade++)
567 uv_blade_info[blade].memory_nid = -1;
594 568
595 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size); 569 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
596 570
@@ -629,6 +603,9 @@ void __init uv_system_init(void)
629 lcpu = uv_blade_info[blade].nr_possible_cpus; 603 lcpu = uv_blade_info[blade].nr_possible_cpus;
630 uv_blade_info[blade].nr_possible_cpus++; 604 uv_blade_info[blade].nr_possible_cpus++;
631 605
606 /* Any node on the blade, else will contain -1. */
607 uv_blade_info[blade].memory_nid = nid;
608
632 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base; 609 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
633 uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size; 610 uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
634 uv_cpu_hub_info(cpu)->m_val = m_val; 611 uv_cpu_hub_info(cpu)->m_val = m_val;
@@ -662,11 +639,10 @@ void __init uv_system_init(void)
662 pnode = (paddr >> m_val) & pnode_mask; 639 pnode = (paddr >> m_val) & pnode_mask;
663 blade = boot_pnode_to_blade(pnode); 640 blade = boot_pnode_to_blade(pnode);
664 uv_node_to_blade[nid] = blade; 641 uv_node_to_blade[nid] = blade;
642 max_pnode = max(pnode, max_pnode);
665 } 643 }
666 644
667 map_gru_high(max_pnode); 645 map_gru_high(max_pnode);
668 map_mmr_high(max_pnode);
669 map_config_high(max_pnode);
670 map_mmioh_high(max_pnode); 646 map_mmioh_high(max_pnode);
671 647
672 uv_cpu_init(); 648 uv_cpu_init();
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 79302e9a33a4..442b5508893f 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -811,7 +811,7 @@ static int apm_do_idle(void)
811 u8 ret = 0; 811 u8 ret = 0;
812 int idled = 0; 812 int idled = 0;
813 int polling; 813 int polling;
814 int err; 814 int err = 0;
815 815
816 polling = !!(current_thread_info()->status & TS_POLLING); 816 polling = !!(current_thread_info()->status & TS_POLLING);
817 if (polling) { 817 if (polling) {
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 3efcb2b96a15..c1f253dac155 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -7,6 +7,10 @@ ifdef CONFIG_FUNCTION_TRACER
7CFLAGS_REMOVE_common.o = -pg 7CFLAGS_REMOVE_common.o = -pg
8endif 8endif
9 9
10# Make sure load_percpu_segment has no stackprotector
11nostackp := $(call cc-option, -fno-stack-protector)
12CFLAGS_common.o := $(nostackp)
13
10obj-y := intel_cacheinfo.o addon_cpuid_features.o 14obj-y := intel_cacheinfo.o addon_cpuid_features.o
11obj-y += proc.o capflags.o powerflags.o common.o 15obj-y += proc.o capflags.o powerflags.o common.o
12obj-y += vmware.o hypervisor.o 16obj-y += vmware.o hypervisor.o
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 28e5f5956042..63fddcd082cd 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -356,7 +356,7 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
356#endif 356#endif
357#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_PCI) 357#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_PCI)
358 /* check CPU config space for extended APIC ID */ 358 /* check CPU config space for extended APIC ID */
359 if (c->x86 >= 0xf) { 359 if (cpu_has_apic && c->x86 >= 0xf) {
360 unsigned int val; 360 unsigned int val;
361 val = read_pci_config(0, 24, 0, 0x68); 361 val = read_pci_config(0, 24, 0, 0x68);
362 if ((val & ((1 << 17) | (1 << 18))) == ((1 << 17) | (1 << 18))) 362 if ((val & ((1 << 17) | (1 << 18))) == ((1 << 17) | (1 << 18)))
@@ -400,6 +400,13 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
400 level = cpuid_eax(1); 400 level = cpuid_eax(1);
401 if((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58) 401 if((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)
402 set_cpu_cap(c, X86_FEATURE_REP_GOOD); 402 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
403
404 /*
405 * Some BIOSes incorrectly force this feature, but only K8
406 * revision D (model = 0x14) and later actually support it.
407 */
408 if (c->x86_model < 0x14)
409 clear_cpu_cap(c, X86_FEATURE_LAHF_LM);
403 } 410 }
404 if (c->x86 == 0x10 || c->x86 == 0x11) 411 if (c->x86 == 0x10 || c->x86 == 0x11)
405 set_cpu_cap(c, X86_FEATURE_REP_GOOD); 412 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index f1961c07af9a..5ce60a88027b 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -59,7 +59,30 @@ void __init setup_cpu_local_masks(void)
59 alloc_bootmem_cpumask_var(&cpu_sibling_setup_mask); 59 alloc_bootmem_cpumask_var(&cpu_sibling_setup_mask);
60} 60}
61 61
62static const struct cpu_dev *this_cpu __cpuinitdata; 62static void __cpuinit default_init(struct cpuinfo_x86 *c)
63{
64#ifdef CONFIG_X86_64
65 display_cacheinfo(c);
66#else
67 /* Not much we can do here... */
68 /* Check if at least it has cpuid */
69 if (c->cpuid_level == -1) {
70 /* No cpuid. It must be an ancient CPU */
71 if (c->x86 == 4)
72 strcpy(c->x86_model_id, "486");
73 else if (c->x86 == 3)
74 strcpy(c->x86_model_id, "386");
75 }
76#endif
77}
78
79static const struct cpu_dev __cpuinitconst default_cpu = {
80 .c_init = default_init,
81 .c_vendor = "Unknown",
82 .c_x86_vendor = X86_VENDOR_UNKNOWN,
83};
84
85static const struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
63 86
64DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = { 87DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
65#ifdef CONFIG_X86_64 88#ifdef CONFIG_X86_64
@@ -332,29 +355,6 @@ void switch_to_new_gdt(int cpu)
332 355
333static const struct cpu_dev *__cpuinitdata cpu_devs[X86_VENDOR_NUM] = {}; 356static const struct cpu_dev *__cpuinitdata cpu_devs[X86_VENDOR_NUM] = {};
334 357
335static void __cpuinit default_init(struct cpuinfo_x86 *c)
336{
337#ifdef CONFIG_X86_64
338 display_cacheinfo(c);
339#else
340 /* Not much we can do here... */
341 /* Check if at least it has cpuid */
342 if (c->cpuid_level == -1) {
343 /* No cpuid. It must be an ancient CPU */
344 if (c->x86 == 4)
345 strcpy(c->x86_model_id, "486");
346 else if (c->x86 == 3)
347 strcpy(c->x86_model_id, "386");
348 }
349#endif
350}
351
352static const struct cpu_dev __cpuinitconst default_cpu = {
353 .c_init = default_init,
354 .c_vendor = "Unknown",
355 .c_x86_vendor = X86_VENDOR_UNKNOWN,
356};
357
358static void __cpuinit get_model_name(struct cpuinfo_x86 *c) 358static void __cpuinit get_model_name(struct cpuinfo_x86 *c)
359{ 359{
360 unsigned int *v; 360 unsigned int *v;
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 484c1e5f658e..01213048f62f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1226,8 +1226,13 @@ static void mce_init(void)
1226} 1226}
1227 1227
1228/* Add per CPU specific workarounds here */ 1228/* Add per CPU specific workarounds here */
1229static void mce_cpu_quirks(struct cpuinfo_x86 *c) 1229static int mce_cpu_quirks(struct cpuinfo_x86 *c)
1230{ 1230{
1231 if (c->x86_vendor == X86_VENDOR_UNKNOWN) {
1232 pr_info("MCE: unknown CPU type - not enabling MCE support.\n");
1233 return -EOPNOTSUPP;
1234 }
1235
1231 /* This should be disabled by the BIOS, but isn't always */ 1236 /* This should be disabled by the BIOS, but isn't always */
1232 if (c->x86_vendor == X86_VENDOR_AMD) { 1237 if (c->x86_vendor == X86_VENDOR_AMD) {
1233 if (c->x86 == 15 && banks > 4) { 1238 if (c->x86 == 15 && banks > 4) {
@@ -1273,11 +1278,20 @@ static void mce_cpu_quirks(struct cpuinfo_x86 *c)
1273 if ((c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xe)) && 1278 if ((c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xe)) &&
1274 monarch_timeout < 0) 1279 monarch_timeout < 0)
1275 monarch_timeout = USEC_PER_SEC; 1280 monarch_timeout = USEC_PER_SEC;
1281
1282 /*
1283 * There are also broken BIOSes on some Pentium M and
1284 * earlier systems:
1285 */
1286 if (c->x86 == 6 && c->x86_model <= 13 && mce_bootlog < 0)
1287 mce_bootlog = 0;
1276 } 1288 }
1277 if (monarch_timeout < 0) 1289 if (monarch_timeout < 0)
1278 monarch_timeout = 0; 1290 monarch_timeout = 0;
1279 if (mce_bootlog != 0) 1291 if (mce_bootlog != 0)
1280 mce_panic_timeout = 30; 1292 mce_panic_timeout = 30;
1293
1294 return 0;
1281} 1295}
1282 1296
1283static void __cpuinit mce_ancient_init(struct cpuinfo_x86 *c) 1297static void __cpuinit mce_ancient_init(struct cpuinfo_x86 *c)
@@ -1338,11 +1352,10 @@ void __cpuinit mcheck_init(struct cpuinfo_x86 *c)
1338 if (!mce_available(c)) 1352 if (!mce_available(c))
1339 return; 1353 return;
1340 1354
1341 if (mce_cap_init() < 0) { 1355 if (mce_cap_init() < 0 || mce_cpu_quirks(c) < 0) {
1342 mce_disabled = 1; 1356 mce_disabled = 1;
1343 return; 1357 return;
1344 } 1358 }
1345 mce_cpu_quirks(c);
1346 1359
1347 machine_check_vector = do_machine_check; 1360 machine_check_vector = do_machine_check;
1348 1361
@@ -1692,17 +1705,15 @@ static ssize_t set_trigger(struct sys_device *s, struct sysdev_attribute *attr,
1692 const char *buf, size_t siz) 1705 const char *buf, size_t siz)
1693{ 1706{
1694 char *p; 1707 char *p;
1695 int len;
1696 1708
1697 strncpy(mce_helper, buf, sizeof(mce_helper)); 1709 strncpy(mce_helper, buf, sizeof(mce_helper));
1698 mce_helper[sizeof(mce_helper)-1] = 0; 1710 mce_helper[sizeof(mce_helper)-1] = 0;
1699 len = strlen(mce_helper);
1700 p = strchr(mce_helper, '\n'); 1711 p = strchr(mce_helper, '\n');
1701 1712
1702 if (*p) 1713 if (p)
1703 *p = 0; 1714 *p = 0;
1704 1715
1705 return len; 1716 return strlen(mce_helper) + !!p;
1706} 1717}
1707 1718
1708static ssize_t set_ignore_ce(struct sys_device *s, 1719static ssize_t set_ignore_ce(struct sys_device *s,
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index bff8dd191dd5..5957a93e5173 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -36,6 +36,7 @@
36 36
37static DEFINE_PER_CPU(__u64, next_check) = INITIAL_JIFFIES; 37static DEFINE_PER_CPU(__u64, next_check) = INITIAL_JIFFIES;
38static DEFINE_PER_CPU(unsigned long, thermal_throttle_count); 38static DEFINE_PER_CPU(unsigned long, thermal_throttle_count);
39static DEFINE_PER_CPU(bool, thermal_throttle_active);
39 40
40static atomic_t therm_throt_en = ATOMIC_INIT(0); 41static atomic_t therm_throt_en = ATOMIC_INIT(0);
41 42
@@ -96,27 +97,33 @@ static int therm_throt_process(int curr)
96{ 97{
97 unsigned int cpu = smp_processor_id(); 98 unsigned int cpu = smp_processor_id();
98 __u64 tmp_jiffs = get_jiffies_64(); 99 __u64 tmp_jiffs = get_jiffies_64();
100 bool was_throttled = __get_cpu_var(thermal_throttle_active);
101 bool is_throttled = __get_cpu_var(thermal_throttle_active) = curr;
99 102
100 if (curr) 103 if (is_throttled)
101 __get_cpu_var(thermal_throttle_count)++; 104 __get_cpu_var(thermal_throttle_count)++;
102 105
103 if (time_before64(tmp_jiffs, __get_cpu_var(next_check))) 106 if (!(was_throttled ^ is_throttled) &&
107 time_before64(tmp_jiffs, __get_cpu_var(next_check)))
104 return 0; 108 return 0;
105 109
106 __get_cpu_var(next_check) = tmp_jiffs + CHECK_INTERVAL; 110 __get_cpu_var(next_check) = tmp_jiffs + CHECK_INTERVAL;
107 111
108 /* if we just entered the thermal event */ 112 /* if we just entered the thermal event */
109 if (curr) { 113 if (is_throttled) {
110 printk(KERN_CRIT "CPU%d: Temperature above threshold, " 114 printk(KERN_CRIT "CPU%d: Temperature above threshold, "
111 "cpu clock throttled (total events = %lu)\n", cpu, 115 "cpu clock throttled (total events = %lu)\n",
112 __get_cpu_var(thermal_throttle_count)); 116 cpu, __get_cpu_var(thermal_throttle_count));
113 117
114 add_taint(TAINT_MACHINE_CHECK); 118 add_taint(TAINT_MACHINE_CHECK);
115 } else { 119 return 1;
116 printk(KERN_CRIT "CPU%d: Temperature/speed normal\n", cpu); 120 }
121 if (was_throttled) {
122 printk(KERN_INFO "CPU%d: Temperature/speed normal\n", cpu);
123 return 1;
117 } 124 }
118 125
119 return 1; 126 return 0;
120} 127}
121 128
122#ifdef CONFIG_SYSFS 129#ifdef CONFIG_SYSFS
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index a7aa8f900954..900332b800f8 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -55,6 +55,7 @@ struct x86_pmu {
55 int num_counters_fixed; 55 int num_counters_fixed;
56 int counter_bits; 56 int counter_bits;
57 u64 counter_mask; 57 u64 counter_mask;
58 int apic;
58 u64 max_period; 59 u64 max_period;
59 u64 intel_ctrl; 60 u64 intel_ctrl;
60}; 61};
@@ -72,8 +73,8 @@ static const u64 p6_perfmon_event_map[] =
72{ 73{
73 [PERF_COUNT_HW_CPU_CYCLES] = 0x0079, 74 [PERF_COUNT_HW_CPU_CYCLES] = 0x0079,
74 [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0, 75 [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0,
75 [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0000, 76 [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0f2e,
76 [PERF_COUNT_HW_CACHE_MISSES] = 0x0000, 77 [PERF_COUNT_HW_CACHE_MISSES] = 0x012e,
77 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4, 78 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4,
78 [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5, 79 [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5,
79 [PERF_COUNT_HW_BUS_CYCLES] = 0x0062, 80 [PERF_COUNT_HW_BUS_CYCLES] = 0x0062,
@@ -613,6 +614,7 @@ static DEFINE_MUTEX(pmc_reserve_mutex);
613 614
614static bool reserve_pmc_hardware(void) 615static bool reserve_pmc_hardware(void)
615{ 616{
617#ifdef CONFIG_X86_LOCAL_APIC
616 int i; 618 int i;
617 619
618 if (nmi_watchdog == NMI_LOCAL_APIC) 620 if (nmi_watchdog == NMI_LOCAL_APIC)
@@ -627,9 +629,11 @@ static bool reserve_pmc_hardware(void)
627 if (!reserve_evntsel_nmi(x86_pmu.eventsel + i)) 629 if (!reserve_evntsel_nmi(x86_pmu.eventsel + i))
628 goto eventsel_fail; 630 goto eventsel_fail;
629 } 631 }
632#endif
630 633
631 return true; 634 return true;
632 635
636#ifdef CONFIG_X86_LOCAL_APIC
633eventsel_fail: 637eventsel_fail:
634 for (i--; i >= 0; i--) 638 for (i--; i >= 0; i--)
635 release_evntsel_nmi(x86_pmu.eventsel + i); 639 release_evntsel_nmi(x86_pmu.eventsel + i);
@@ -644,10 +648,12 @@ perfctr_fail:
644 enable_lapic_nmi_watchdog(); 648 enable_lapic_nmi_watchdog();
645 649
646 return false; 650 return false;
651#endif
647} 652}
648 653
649static void release_pmc_hardware(void) 654static void release_pmc_hardware(void)
650{ 655{
656#ifdef CONFIG_X86_LOCAL_APIC
651 int i; 657 int i;
652 658
653 for (i = 0; i < x86_pmu.num_counters; i++) { 659 for (i = 0; i < x86_pmu.num_counters; i++) {
@@ -657,6 +663,7 @@ static void release_pmc_hardware(void)
657 663
658 if (nmi_watchdog == NMI_LOCAL_APIC) 664 if (nmi_watchdog == NMI_LOCAL_APIC)
659 enable_lapic_nmi_watchdog(); 665 enable_lapic_nmi_watchdog();
666#endif
660} 667}
661 668
662static void hw_perf_counter_destroy(struct perf_counter *counter) 669static void hw_perf_counter_destroy(struct perf_counter *counter)
@@ -748,6 +755,15 @@ static int __hw_perf_counter_init(struct perf_counter *counter)
748 hwc->sample_period = x86_pmu.max_period; 755 hwc->sample_period = x86_pmu.max_period;
749 hwc->last_period = hwc->sample_period; 756 hwc->last_period = hwc->sample_period;
750 atomic64_set(&hwc->period_left, hwc->sample_period); 757 atomic64_set(&hwc->period_left, hwc->sample_period);
758 } else {
759 /*
760 * If we have a PMU initialized but no APIC
761 * interrupts, we cannot sample hardware
762 * counters (user-space has to fall back and
763 * sample via a hrtimer based software counter):
764 */
765 if (!x86_pmu.apic)
766 return -EOPNOTSUPP;
751 } 767 }
752 768
753 counter->destroy = hw_perf_counter_destroy; 769 counter->destroy = hw_perf_counter_destroy;
@@ -1449,18 +1465,22 @@ void smp_perf_pending_interrupt(struct pt_regs *regs)
1449 1465
1450void set_perf_counter_pending(void) 1466void set_perf_counter_pending(void)
1451{ 1467{
1468#ifdef CONFIG_X86_LOCAL_APIC
1452 apic->send_IPI_self(LOCAL_PENDING_VECTOR); 1469 apic->send_IPI_self(LOCAL_PENDING_VECTOR);
1470#endif
1453} 1471}
1454 1472
1455void perf_counters_lapic_init(void) 1473void perf_counters_lapic_init(void)
1456{ 1474{
1457 if (!x86_pmu_initialized()) 1475#ifdef CONFIG_X86_LOCAL_APIC
1476 if (!x86_pmu.apic || !x86_pmu_initialized())
1458 return; 1477 return;
1459 1478
1460 /* 1479 /*
1461 * Always use NMI for PMU 1480 * Always use NMI for PMU
1462 */ 1481 */
1463 apic_write(APIC_LVTPC, APIC_DM_NMI); 1482 apic_write(APIC_LVTPC, APIC_DM_NMI);
1483#endif
1464} 1484}
1465 1485
1466static int __kprobes 1486static int __kprobes
@@ -1484,7 +1504,9 @@ perf_counter_nmi_handler(struct notifier_block *self,
1484 1504
1485 regs = args->regs; 1505 regs = args->regs;
1486 1506
1507#ifdef CONFIG_X86_LOCAL_APIC
1487 apic_write(APIC_LVTPC, APIC_DM_NMI); 1508 apic_write(APIC_LVTPC, APIC_DM_NMI);
1509#endif
1488 /* 1510 /*
1489 * Can't rely on the handled return value to say it was our NMI, two 1511 * Can't rely on the handled return value to say it was our NMI, two
1490 * counters could trigger 'simultaneously' raising two back-to-back NMIs. 1512 * counters could trigger 'simultaneously' raising two back-to-back NMIs.
@@ -1515,6 +1537,7 @@ static struct x86_pmu p6_pmu = {
1515 .event_map = p6_pmu_event_map, 1537 .event_map = p6_pmu_event_map,
1516 .raw_event = p6_pmu_raw_event, 1538 .raw_event = p6_pmu_raw_event,
1517 .max_events = ARRAY_SIZE(p6_perfmon_event_map), 1539 .max_events = ARRAY_SIZE(p6_perfmon_event_map),
1540 .apic = 1,
1518 .max_period = (1ULL << 31) - 1, 1541 .max_period = (1ULL << 31) - 1,
1519 .version = 0, 1542 .version = 0,
1520 .num_counters = 2, 1543 .num_counters = 2,
@@ -1541,6 +1564,7 @@ static struct x86_pmu intel_pmu = {
1541 .event_map = intel_pmu_event_map, 1564 .event_map = intel_pmu_event_map,
1542 .raw_event = intel_pmu_raw_event, 1565 .raw_event = intel_pmu_raw_event,
1543 .max_events = ARRAY_SIZE(intel_perfmon_event_map), 1566 .max_events = ARRAY_SIZE(intel_perfmon_event_map),
1567 .apic = 1,
1544 /* 1568 /*
1545 * Intel PMCs cannot be accessed sanely above 32 bit width, 1569 * Intel PMCs cannot be accessed sanely above 32 bit width,
1546 * so we install an artificial 1<<31 period regardless of 1570 * so we install an artificial 1<<31 period regardless of
@@ -1564,6 +1588,7 @@ static struct x86_pmu amd_pmu = {
1564 .num_counters = 4, 1588 .num_counters = 4,
1565 .counter_bits = 48, 1589 .counter_bits = 48,
1566 .counter_mask = (1ULL << 48) - 1, 1590 .counter_mask = (1ULL << 48) - 1,
1591 .apic = 1,
1567 /* use highest bit to detect overflow */ 1592 /* use highest bit to detect overflow */
1568 .max_period = (1ULL << 47) - 1, 1593 .max_period = (1ULL << 47) - 1,
1569}; 1594};
@@ -1589,13 +1614,14 @@ static int p6_pmu_init(void)
1589 return -ENODEV; 1614 return -ENODEV;
1590 } 1615 }
1591 1616
1617 x86_pmu = p6_pmu;
1618
1592 if (!cpu_has_apic) { 1619 if (!cpu_has_apic) {
1593 pr_info("no Local APIC, try rebooting with lapic"); 1620 pr_info("no APIC, boot with the \"lapic\" boot parameter to force-enable it.\n");
1594 return -ENODEV; 1621 pr_info("no hardware sampling interrupt available.\n");
1622 x86_pmu.apic = 0;
1595 } 1623 }
1596 1624
1597 x86_pmu = p6_pmu;
1598
1599 return 0; 1625 return 0;
1600} 1626}
1601 1627
diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
index 96f7ac0bbf01..fe26ba3e3451 100644
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -354,7 +354,7 @@ void __init efi_init(void)
354 */ 354 */
355 c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2); 355 c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2);
356 if (c16) { 356 if (c16) {
357 for (i = 0; i < sizeof(vendor) && *c16; ++i) 357 for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i)
358 vendor[i] = *c16++; 358 vendor[i] = *c16++;
359 vendor[i] = '\0'; 359 vendor[i] = '\0';
360 } else 360 } else
@@ -512,7 +512,7 @@ void __init efi_enter_virtual_mode(void)
512 && end_pfn <= max_pfn_mapped)) 512 && end_pfn <= max_pfn_mapped))
513 va = __va(md->phys_addr); 513 va = __va(md->phys_addr);
514 else 514 else
515 va = efi_ioremap(md->phys_addr, size); 515 va = efi_ioremap(md->phys_addr, size, md->type);
516 516
517 md->virt_addr = (u64) (unsigned long) va; 517 md->virt_addr = (u64) (unsigned long) va;
518 518
diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c
index 22c3b7828c50..ac0621a7ac3d 100644
--- a/arch/x86/kernel/efi_64.c
+++ b/arch/x86/kernel/efi_64.c
@@ -98,10 +98,14 @@ void __init efi_call_phys_epilog(void)
98 early_runtime_code_mapping_set_exec(0); 98 early_runtime_code_mapping_set_exec(0);
99} 99}
100 100
101void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size) 101void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
102 u32 type)
102{ 103{
103 unsigned long last_map_pfn; 104 unsigned long last_map_pfn;
104 105
106 if (type == EFI_MEMORY_MAPPED_IO)
107 return ioremap(phys_addr, size);
108
105 last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size); 109 last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
106 if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) 110 if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size)
107 return NULL; 111 return NULL;
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 8663afb56535..cc827ac9e8d3 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -261,9 +261,7 @@ page_pde_offset = (__PAGE_OFFSET >> 20);
261 * which will be freed later 261 * which will be freed later
262 */ 262 */
263 263
264#ifndef CONFIG_HOTPLUG_CPU 264__CPUINIT
265.section .init.text,"ax",@progbits
266#endif
267 265
268#ifdef CONFIG_SMP 266#ifdef CONFIG_SMP
269ENTRY(startup_32_smp) 267ENTRY(startup_32_smp)
@@ -602,7 +600,7 @@ ignore_int:
602#endif 600#endif
603 iret 601 iret
604 602
605.section .cpuinit.data,"wa" 603 __REFDATA
606.align 4 604.align 4
607ENTRY(initial_code) 605ENTRY(initial_code)
608 .long i386_start_kernel 606 .long i386_start_kernel
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index 696f0e475c2d..92b7703d3d58 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -187,7 +187,7 @@ static void __init apic_intr_init(void)
187#ifdef CONFIG_X86_THERMAL_VECTOR 187#ifdef CONFIG_X86_THERMAL_VECTOR
188 alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt); 188 alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
189#endif 189#endif
190#ifdef CONFIG_X86_THRESHOLD 190#ifdef CONFIG_X86_MCE_THRESHOLD
191 alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt); 191 alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
192#endif 192#endif
193#if defined(CONFIG_X86_NEW_MCE) && defined(CONFIG_X86_LOCAL_APIC) 193#if defined(CONFIG_X86_NEW_MCE) && defined(CONFIG_X86_LOCAL_APIC)
diff --git a/arch/x86/kernel/mfgpt_32.c b/arch/x86/kernel/mfgpt_32.c
index 846510b78a09..2a62d843f015 100644
--- a/arch/x86/kernel/mfgpt_32.c
+++ b/arch/x86/kernel/mfgpt_32.c
@@ -347,7 +347,7 @@ static irqreturn_t mfgpt_tick(int irq, void *dev_id)
347 347
348static struct irqaction mfgptirq = { 348static struct irqaction mfgptirq = {
349 .handler = mfgpt_tick, 349 .handler = mfgpt_tick,
350 .flags = IRQF_DISABLED | IRQF_NOBALANCING, 350 .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_TIMER,
351 .name = "mfgpt-timer" 351 .name = "mfgpt-timer"
352}; 352};
353 353
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 994dd6a4a2a0..071166a4ba83 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -519,16 +519,12 @@ static void c1e_idle(void)
519 if (!cpumask_test_cpu(cpu, c1e_mask)) { 519 if (!cpumask_test_cpu(cpu, c1e_mask)) {
520 cpumask_set_cpu(cpu, c1e_mask); 520 cpumask_set_cpu(cpu, c1e_mask);
521 /* 521 /*
522 * Force broadcast so ACPI can not interfere. Needs 522 * Force broadcast so ACPI can not interfere.
523 * to run with interrupts enabled as it uses
524 * smp_function_call.
525 */ 523 */
526 local_irq_enable();
527 clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_FORCE, 524 clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_FORCE,
528 &cpu); 525 &cpu);
529 printk(KERN_INFO "Switch to broadcast mode on CPU%d\n", 526 printk(KERN_INFO "Switch to broadcast mode on CPU%d\n",
530 cpu); 527 cpu);
531 local_irq_disable();
532 } 528 }
533 clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu); 529 clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu);
534 530
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index d2d1ce8170f0..a06e8d101844 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -3,6 +3,7 @@
3#include <linux/init.h> 3#include <linux/init.h>
4#include <linux/pm.h> 4#include <linux/pm.h>
5#include <linux/efi.h> 5#include <linux/efi.h>
6#include <linux/dmi.h>
6#include <acpi/reboot.h> 7#include <acpi/reboot.h>
7#include <asm/io.h> 8#include <asm/io.h>
8#include <asm/apic.h> 9#include <asm/apic.h>
@@ -17,7 +18,6 @@
17#include <asm/cpu.h> 18#include <asm/cpu.h>
18 19
19#ifdef CONFIG_X86_32 20#ifdef CONFIG_X86_32
20# include <linux/dmi.h>
21# include <linux/ctype.h> 21# include <linux/ctype.h>
22# include <linux/mc146818rtc.h> 22# include <linux/mc146818rtc.h>
23#else 23#else
@@ -249,6 +249,14 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
249 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), 249 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"),
250 }, 250 },
251 }, 251 },
252 { /* Handle problems with rebooting on CompuLab SBC-FITPC2 */
253 .callback = set_bios_reboot,
254 .ident = "CompuLab SBC-FITPC2",
255 .matches = {
256 DMI_MATCH(DMI_SYS_VENDOR, "CompuLab"),
257 DMI_MATCH(DMI_PRODUCT_NAME, "SBC-FITPC2"),
258 },
259 },
252 { } 260 { }
253}; 261};
254 262
@@ -396,6 +404,46 @@ EXPORT_SYMBOL(machine_real_restart);
396 404
397#endif /* CONFIG_X86_32 */ 405#endif /* CONFIG_X86_32 */
398 406
407/*
408 * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot
409 */
410static int __init set_pci_reboot(const struct dmi_system_id *d)
411{
412 if (reboot_type != BOOT_CF9) {
413 reboot_type = BOOT_CF9;
414 printk(KERN_INFO "%s series board detected. "
415 "Selecting PCI-method for reboots.\n", d->ident);
416 }
417 return 0;
418}
419
420static struct dmi_system_id __initdata pci_reboot_dmi_table[] = {
421 { /* Handle problems with rebooting on Apple MacBook5 */
422 .callback = set_pci_reboot,
423 .ident = "Apple MacBook5",
424 .matches = {
425 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
426 DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"),
427 },
428 },
429 { /* Handle problems with rebooting on Apple MacBookPro5 */
430 .callback = set_pci_reboot,
431 .ident = "Apple MacBookPro5",
432 .matches = {
433 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
434 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"),
435 },
436 },
437 { }
438};
439
440static int __init pci_reboot_init(void)
441{
442 dmi_check_system(pci_reboot_dmi_table);
443 return 0;
444}
445core_initcall(pci_reboot_init);
446
399static inline void kb_wait(void) 447static inline void kb_wait(void)
400{ 448{
401 int i; 449 int i;
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index de2cab132844..63f32d220ef2 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -672,6 +672,19 @@ static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
672 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), 672 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"),
673 }, 673 },
674 }, 674 },
675 {
676 /*
677 * AMI BIOS with low memory corruption was found on Intel DG45ID board.
678 * It hase different DMI_BIOS_VENDOR = "Intel Corp.", for now we will
679 * match only DMI_BOARD_NAME and see if there is more bad products
680 * with this vendor.
681 */
682 .callback = dmi_low_memory_corruption,
683 .ident = "AMI BIOS",
684 .matches = {
685 DMI_MATCH(DMI_BOARD_NAME, "DG45ID"),
686 },
687 },
675#endif 688#endif
676 {} 689 {}
677}; 690};
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 29a3eef7cf4a..07d81916f212 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -165,7 +165,7 @@ static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
165 165
166 if (!chosen) { 166 if (!chosen) {
167 size_t vm_size = VMALLOC_END - VMALLOC_START; 167 size_t vm_size = VMALLOC_END - VMALLOC_START;
168 size_t tot_size = num_possible_cpus() * PMD_SIZE; 168 size_t tot_size = nr_cpu_ids * PMD_SIZE;
169 169
170 /* on non-NUMA, embedding is better */ 170 /* on non-NUMA, embedding is better */
171 if (!pcpu_need_numa()) 171 if (!pcpu_need_numa())
@@ -199,7 +199,7 @@ static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
199 dyn_size = pcpul_size - static_size - PERCPU_FIRST_CHUNK_RESERVE; 199 dyn_size = pcpul_size - static_size - PERCPU_FIRST_CHUNK_RESERVE;
200 200
201 /* allocate pointer array and alloc large pages */ 201 /* allocate pointer array and alloc large pages */
202 map_size = PFN_ALIGN(num_possible_cpus() * sizeof(pcpul_map[0])); 202 map_size = PFN_ALIGN(nr_cpu_ids * sizeof(pcpul_map[0]));
203 pcpul_map = alloc_bootmem(map_size); 203 pcpul_map = alloc_bootmem(map_size);
204 204
205 for_each_possible_cpu(cpu) { 205 for_each_possible_cpu(cpu) {
@@ -228,7 +228,7 @@ static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
228 228
229 /* allocate address and map */ 229 /* allocate address and map */
230 pcpul_vm.flags = VM_ALLOC; 230 pcpul_vm.flags = VM_ALLOC;
231 pcpul_vm.size = num_possible_cpus() * PMD_SIZE; 231 pcpul_vm.size = nr_cpu_ids * PMD_SIZE;
232 vm_area_register_early(&pcpul_vm, PMD_SIZE); 232 vm_area_register_early(&pcpul_vm, PMD_SIZE);
233 233
234 for_each_possible_cpu(cpu) { 234 for_each_possible_cpu(cpu) {
@@ -250,8 +250,8 @@ static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
250 PMD_SIZE, pcpul_vm.addr, NULL); 250 PMD_SIZE, pcpul_vm.addr, NULL);
251 251
252 /* sort pcpul_map array for pcpu_lpage_remapped() */ 252 /* sort pcpul_map array for pcpu_lpage_remapped() */
253 for (i = 0; i < num_possible_cpus() - 1; i++) 253 for (i = 0; i < nr_cpu_ids - 1; i++)
254 for (j = i + 1; j < num_possible_cpus(); j++) 254 for (j = i + 1; j < nr_cpu_ids; j++)
255 if (pcpul_map[i].ptr > pcpul_map[j].ptr) { 255 if (pcpul_map[i].ptr > pcpul_map[j].ptr) {
256 struct pcpul_ent tmp = pcpul_map[i]; 256 struct pcpul_ent tmp = pcpul_map[i];
257 pcpul_map[i] = pcpul_map[j]; 257 pcpul_map[i] = pcpul_map[j];
@@ -288,7 +288,7 @@ void *pcpu_lpage_remapped(void *kaddr)
288{ 288{
289 void *pmd_addr = (void *)((unsigned long)kaddr & PMD_MASK); 289 void *pmd_addr = (void *)((unsigned long)kaddr & PMD_MASK);
290 unsigned long offset = (unsigned long)kaddr & ~PMD_MASK; 290 unsigned long offset = (unsigned long)kaddr & ~PMD_MASK;
291 int left = 0, right = num_possible_cpus() - 1; 291 int left = 0, right = nr_cpu_ids - 1;
292 int pos; 292 int pos;
293 293
294 /* pcpul in use at all? */ 294 /* pcpul in use at all? */
@@ -377,7 +377,7 @@ static ssize_t __init setup_pcpu_4k(size_t static_size)
377 pcpu4k_nr_static_pages = PFN_UP(static_size); 377 pcpu4k_nr_static_pages = PFN_UP(static_size);
378 378
379 /* unaligned allocations can't be freed, round up to page size */ 379 /* unaligned allocations can't be freed, round up to page size */
380 pages_size = PFN_ALIGN(pcpu4k_nr_static_pages * num_possible_cpus() 380 pages_size = PFN_ALIGN(pcpu4k_nr_static_pages * nr_cpu_ids
381 * sizeof(pcpu4k_pages[0])); 381 * sizeof(pcpu4k_pages[0]));
382 pcpu4k_pages = alloc_bootmem(pages_size); 382 pcpu4k_pages = alloc_bootmem(pages_size);
383 383
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index 8ccabb8a2f6a..77b9689f8edb 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -744,6 +744,7 @@ uv_activation_descriptor_init(int node, int pnode)
744 * note that base_dest_nodeid is actually a nasid. 744 * note that base_dest_nodeid is actually a nasid.
745 */ 745 */
746 ad2->header.base_dest_nodeid = uv_partition_base_pnode << 1; 746 ad2->header.base_dest_nodeid = uv_partition_base_pnode << 1;
747 ad2->header.dest_subnodeid = 0x10; /* the LB */
747 ad2->header.command = UV_NET_ENDPOINT_INTD; 748 ad2->header.command = UV_NET_ENDPOINT_INTD;
748 ad2->header.int_both = 1; 749 ad2->header.int_both = 1;
749 /* 750 /*
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 6e1a368d21d4..71f4368b357e 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -275,15 +275,20 @@ static unsigned long pit_calibrate_tsc(u32 latch, unsigned long ms, int loopmin)
275 * use the TSC value at the transitions to calculate a pretty 275 * use the TSC value at the transitions to calculate a pretty
276 * good value for the TSC frequencty. 276 * good value for the TSC frequencty.
277 */ 277 */
278static inline int pit_verify_msb(unsigned char val)
279{
280 /* Ignore LSB */
281 inb(0x42);
282 return inb(0x42) == val;
283}
284
278static inline int pit_expect_msb(unsigned char val, u64 *tscp, unsigned long *deltap) 285static inline int pit_expect_msb(unsigned char val, u64 *tscp, unsigned long *deltap)
279{ 286{
280 int count; 287 int count;
281 u64 tsc = 0; 288 u64 tsc = 0;
282 289
283 for (count = 0; count < 50000; count++) { 290 for (count = 0; count < 50000; count++) {
284 /* Ignore LSB */ 291 if (!pit_verify_msb(val))
285 inb(0x42);
286 if (inb(0x42) != val)
287 break; 292 break;
288 tsc = get_cycles(); 293 tsc = get_cycles();
289 } 294 }
@@ -336,8 +341,7 @@ static unsigned long quick_pit_calibrate(void)
336 * to do that is to just read back the 16-bit counter 341 * to do that is to just read back the 16-bit counter
337 * once from the PIT. 342 * once from the PIT.
338 */ 343 */
339 inb(0x42); 344 pit_verify_msb(0);
340 inb(0x42);
341 345
342 if (pit_expect_msb(0xff, &tsc, &d1)) { 346 if (pit_expect_msb(0xff, &tsc, &d1)) {
343 for (i = 1; i <= MAX_QUICK_PIT_ITERATIONS; i++) { 347 for (i = 1; i <= MAX_QUICK_PIT_ITERATIONS; i++) {
@@ -348,8 +352,19 @@ static unsigned long quick_pit_calibrate(void)
348 * Iterate until the error is less than 500 ppm 352 * Iterate until the error is less than 500 ppm
349 */ 353 */
350 delta -= tsc; 354 delta -= tsc;
351 if (d1+d2 < delta >> 11) 355 if (d1+d2 >= delta >> 11)
352 goto success; 356 continue;
357
358 /*
359 * Check the PIT one more time to verify that
360 * all TSC reads were stable wrt the PIT.
361 *
362 * This also guarantees serialization of the
363 * last cycle read ('d2') in pit_expect_msb.
364 */
365 if (!pit_verify_msb(0xfe - i))
366 break;
367 goto success;
353 } 368 }
354 } 369 }
355 printk("Fast TSC calibration failed\n"); 370 printk("Fast TSC calibration failed\n");
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index b263423fbe2a..95a7289e4b0c 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -441,7 +441,7 @@ vmi_startup_ipi_hook(int phys_apicid, unsigned long start_eip,
441 ap.ds = __USER_DS; 441 ap.ds = __USER_DS;
442 ap.es = __USER_DS; 442 ap.es = __USER_DS;
443 ap.fs = __KERNEL_PERCPU; 443 ap.fs = __KERNEL_PERCPU;
444 ap.gs = 0; 444 ap.gs = __KERNEL_STACK_CANARY;
445 445
446 ap.eflags = 0; 446 ap.eflags = 0;
447 447
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 367e87882041..9fc178255c04 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -46,11 +46,10 @@ PHDRS {
46 data PT_LOAD FLAGS(7); /* RWE */ 46 data PT_LOAD FLAGS(7); /* RWE */
47#ifdef CONFIG_X86_64 47#ifdef CONFIG_X86_64
48 user PT_LOAD FLAGS(7); /* RWE */ 48 user PT_LOAD FLAGS(7); /* RWE */
49 data.init PT_LOAD FLAGS(7); /* RWE */
50#ifdef CONFIG_SMP 49#ifdef CONFIG_SMP
51 percpu PT_LOAD FLAGS(7); /* RWE */ 50 percpu PT_LOAD FLAGS(7); /* RWE */
52#endif 51#endif
53 data.init2 PT_LOAD FLAGS(7); /* RWE */ 52 init PT_LOAD FLAGS(7); /* RWE */
54#endif 53#endif
55 note PT_NOTE FLAGS(0); /* ___ */ 54 note PT_NOTE FLAGS(0); /* ___ */
56} 55}
@@ -103,72 +102,43 @@ SECTIONS
103 __stop___ex_table = .; 102 __stop___ex_table = .;
104 } :text = 0x9090 103 } :text = 0x9090
105 104
106 RODATA 105 RO_DATA(PAGE_SIZE)
107 106
108 /* Data */ 107 /* Data */
109 . = ALIGN(PAGE_SIZE);
110 .data : AT(ADDR(.data) - LOAD_OFFSET) { 108 .data : AT(ADDR(.data) - LOAD_OFFSET) {
111 /* Start of data section */ 109 /* Start of data section */
112 _sdata = .; 110 _sdata = .;
113 DATA_DATA
114 CONSTRUCTORS
115 111
116#ifdef CONFIG_X86_64 112 /* init_task */
117 /* End of data section */ 113 INIT_TASK_DATA(THREAD_SIZE)
118 _edata = .;
119#endif
120 } :data
121 114
122#ifdef CONFIG_X86_32 115#ifdef CONFIG_X86_32
123 /* 32 bit has nosave before _edata */ 116 /* 32 bit has nosave before _edata */
124 . = ALIGN(PAGE_SIZE); 117 NOSAVE_DATA
125 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
126 __nosave_begin = .;
127 *(.data.nosave)
128 . = ALIGN(PAGE_SIZE);
129 __nosave_end = .;
130 }
131#endif 118#endif
132 119
133 . = ALIGN(PAGE_SIZE); 120 PAGE_ALIGNED_DATA(PAGE_SIZE)
134 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
135 *(.data.page_aligned)
136 *(.data.idt) 121 *(.data.idt)
137 }
138 122
139#ifdef CONFIG_X86_32 123 CACHELINE_ALIGNED_DATA(CONFIG_X86_L1_CACHE_BYTES)
140 . = ALIGN(32);
141#else
142 . = ALIGN(PAGE_SIZE);
143 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
144#endif
145 .data.cacheline_aligned :
146 AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
147 *(.data.cacheline_aligned)
148 }
149 124
150 /* rarely changed data like cpu maps */ 125 DATA_DATA
151#ifdef CONFIG_X86_32 126 CONSTRUCTORS
152 . = ALIGN(32); 127
153#else 128 /* rarely changed data like cpu maps */
154 . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES); 129 READ_MOSTLY_DATA(CONFIG_X86_INTERNODE_CACHE_BYTES)
155#endif
156 .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
157 *(.data.read_mostly)
158 130
159#ifdef CONFIG_X86_32
160 /* End of data section */ 131 /* End of data section */
161 _edata = .; 132 _edata = .;
162#endif 133 } :data
163 }
164 134
165#ifdef CONFIG_X86_64 135#ifdef CONFIG_X86_64
166 136
167#define VSYSCALL_ADDR (-10*1024*1024) 137#define VSYSCALL_ADDR (-10*1024*1024)
168#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + \ 138#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data) + SIZEOF(.data) + \
169 SIZEOF(.data.read_mostly) + 4095) & ~(4095)) 139 PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
170#define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + \ 140#define VSYSCALL_VIRT_ADDR ((ADDR(.data) + SIZEOF(.data) + \
171 SIZEOF(.data.read_mostly) + 4095) & ~(4095)) 141 PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
172 142
173#define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR) 143#define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
174#define VLOAD(x) (ADDR(x) - VLOAD_OFFSET) 144#define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
@@ -234,35 +204,29 @@ SECTIONS
234 204
235#endif /* CONFIG_X86_64 */ 205#endif /* CONFIG_X86_64 */
236 206
237 /* init_task */ 207 /* Init code and data - will be freed after init */
238 . = ALIGN(THREAD_SIZE); 208 . = ALIGN(PAGE_SIZE);
239 .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) { 209 .init.begin : AT(ADDR(.init.begin) - LOAD_OFFSET) {
240 *(.data.init_task) 210 __init_begin = .; /* paired with __init_end */
241 } 211 }
242#ifdef CONFIG_X86_64
243 :data.init
244#endif
245 212
213#if defined(CONFIG_X86_64) && defined(CONFIG_SMP)
246 /* 214 /*
247 * smp_locks might be freed after init 215 * percpu offsets are zero-based on SMP. PERCPU_VADDR() changes the
248 * start/end must be page aligned 216 * output PHDR, so the next output section - .init.text - should
217 * start another segment - init.
249 */ 218 */
250 . = ALIGN(PAGE_SIZE); 219 PERCPU_VADDR(0, :percpu)
251 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) { 220#endif
252 __smp_locks = .;
253 *(.smp_locks)
254 __smp_locks_end = .;
255 . = ALIGN(PAGE_SIZE);
256 }
257 221
258 /* Init code and data - will be freed after init */
259 . = ALIGN(PAGE_SIZE);
260 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 222 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
261 __init_begin = .; /* paired with __init_end */
262 _sinittext = .; 223 _sinittext = .;
263 INIT_TEXT 224 INIT_TEXT
264 _einittext = .; 225 _einittext = .;
265 } 226 }
227#ifdef CONFIG_X86_64
228 :init
229#endif
266 230
267 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { 231 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
268 INIT_DATA 232 INIT_DATA
@@ -333,17 +297,7 @@ SECTIONS
333 } 297 }
334#endif 298#endif
335 299
336#if defined(CONFIG_X86_64) && defined(CONFIG_SMP) 300#if !defined(CONFIG_X86_64) || !defined(CONFIG_SMP)
337 /*
338 * percpu offsets are zero-based on SMP. PERCPU_VADDR() changes the
339 * output PHDR, so the next output section - __data_nosave - should
340 * start another section data.init2. Also, pda should be at the head of
341 * percpu area. Preallocate it and define the percpu offset symbol
342 * so that it can be accessed as a percpu variable.
343 */
344 . = ALIGN(PAGE_SIZE);
345 PERCPU_VADDR(0, :percpu)
346#else
347 PERCPU(PAGE_SIZE) 301 PERCPU(PAGE_SIZE)
348#endif 302#endif
349 303
@@ -354,15 +308,22 @@ SECTIONS
354 __init_end = .; 308 __init_end = .;
355 } 309 }
356 310
311 /*
312 * smp_locks might be freed after init
313 * start/end must be page aligned
314 */
315 . = ALIGN(PAGE_SIZE);
316 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
317 __smp_locks = .;
318 *(.smp_locks)
319 __smp_locks_end = .;
320 . = ALIGN(PAGE_SIZE);
321 }
322
357#ifdef CONFIG_X86_64 323#ifdef CONFIG_X86_64
358 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { 324 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
359 . = ALIGN(PAGE_SIZE); 325 NOSAVE_DATA
360 __nosave_begin = .; 326 }
361 *(.data.nosave)
362 . = ALIGN(PAGE_SIZE);
363 __nosave_end = .;
364 } :data.init2
365 /* use another section data.init2, see PERCPU_VADDR() above */
366#endif 327#endif
367 328
368 /* BSS */ 329 /* BSS */
@@ -400,8 +361,8 @@ SECTIONS
400 361
401 362
402#ifdef CONFIG_X86_32 363#ifdef CONFIG_X86_32
403ASSERT((_end - LOAD_OFFSET <= KERNEL_IMAGE_SIZE), 364. = ASSERT((_end - LOAD_OFFSET <= KERNEL_IMAGE_SIZE),
404 "kernel image bigger than KERNEL_IMAGE_SIZE") 365 "kernel image bigger than KERNEL_IMAGE_SIZE");
405#else 366#else
406/* 367/*
407 * Per-cpu symbols which need to be offset from __per_cpu_load 368 * Per-cpu symbols which need to be offset from __per_cpu_load
@@ -414,12 +375,12 @@ INIT_PER_CPU(irq_stack_union);
414/* 375/*
415 * Build-time check on the image size: 376 * Build-time check on the image size:
416 */ 377 */
417ASSERT((_end - _text <= KERNEL_IMAGE_SIZE), 378. = ASSERT((_end - _text <= KERNEL_IMAGE_SIZE),
418 "kernel image bigger than KERNEL_IMAGE_SIZE") 379 "kernel image bigger than KERNEL_IMAGE_SIZE");
419 380
420#ifdef CONFIG_SMP 381#ifdef CONFIG_SMP
421ASSERT((per_cpu__irq_stack_union == 0), 382. = ASSERT((per_cpu__irq_stack_union == 0),
422 "irq_stack_union is not at start of per-cpu area"); 383 "irq_stack_union is not at start of per-cpu area");
423#endif 384#endif
424 385
425#endif /* CONFIG_X86_32 */ 386#endif /* CONFIG_X86_32 */
@@ -427,7 +388,7 @@ ASSERT((per_cpu__irq_stack_union == 0),
427#ifdef CONFIG_KEXEC 388#ifdef CONFIG_KEXEC
428#include <asm/kexec.h> 389#include <asm/kexec.h>
429 390
430ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE, 391. = ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE,
431 "kexec control code size is too big") 392 "kexec control code size is too big");
432#endif 393#endif
433 394
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 4d6f0d293ee2..21f68e00524f 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -104,6 +104,9 @@ static s64 __kpit_elapsed(struct kvm *kvm)
104 ktime_t remaining; 104 ktime_t remaining;
105 struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state; 105 struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;
106 106
107 if (!ps->pit_timer.period)
108 return 0;
109
107 /* 110 /*
108 * The Counter does not stop when it reaches zero. In 111 * The Counter does not stop when it reaches zero. In
109 * Modes 0, 1, 4, and 5 the Counter ``wraps around'' to 112 * Modes 0, 1, 4, and 5 the Counter ``wraps around'' to
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 7030b5f911bf..0ef5bb2b4043 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -489,16 +489,20 @@ static unsigned long *gfn_to_rmap(struct kvm *kvm, gfn_t gfn, int lpage)
489 * 489 *
490 * If rmapp bit zero is one, (then rmap & ~1) points to a struct kvm_rmap_desc 490 * If rmapp bit zero is one, (then rmap & ~1) points to a struct kvm_rmap_desc
491 * containing more mappings. 491 * containing more mappings.
492 *
493 * Returns the number of rmap entries before the spte was added or zero if
494 * the spte was not added.
495 *
492 */ 496 */
493static void rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn, int lpage) 497static int rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn, int lpage)
494{ 498{
495 struct kvm_mmu_page *sp; 499 struct kvm_mmu_page *sp;
496 struct kvm_rmap_desc *desc; 500 struct kvm_rmap_desc *desc;
497 unsigned long *rmapp; 501 unsigned long *rmapp;
498 int i; 502 int i, count = 0;
499 503
500 if (!is_rmap_pte(*spte)) 504 if (!is_rmap_pte(*spte))
501 return; 505 return count;
502 gfn = unalias_gfn(vcpu->kvm, gfn); 506 gfn = unalias_gfn(vcpu->kvm, gfn);
503 sp = page_header(__pa(spte)); 507 sp = page_header(__pa(spte));
504 sp->gfns[spte - sp->spt] = gfn; 508 sp->gfns[spte - sp->spt] = gfn;
@@ -515,8 +519,10 @@ static void rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn, int lpage)
515 } else { 519 } else {
516 rmap_printk("rmap_add: %p %llx many->many\n", spte, *spte); 520 rmap_printk("rmap_add: %p %llx many->many\n", spte, *spte);
517 desc = (struct kvm_rmap_desc *)(*rmapp & ~1ul); 521 desc = (struct kvm_rmap_desc *)(*rmapp & ~1ul);
518 while (desc->shadow_ptes[RMAP_EXT-1] && desc->more) 522 while (desc->shadow_ptes[RMAP_EXT-1] && desc->more) {
519 desc = desc->more; 523 desc = desc->more;
524 count += RMAP_EXT;
525 }
520 if (desc->shadow_ptes[RMAP_EXT-1]) { 526 if (desc->shadow_ptes[RMAP_EXT-1]) {
521 desc->more = mmu_alloc_rmap_desc(vcpu); 527 desc->more = mmu_alloc_rmap_desc(vcpu);
522 desc = desc->more; 528 desc = desc->more;
@@ -525,6 +531,7 @@ static void rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn, int lpage)
525 ; 531 ;
526 desc->shadow_ptes[i] = spte; 532 desc->shadow_ptes[i] = spte;
527 } 533 }
534 return count;
528} 535}
529 536
530static void rmap_desc_remove_entry(unsigned long *rmapp, 537static void rmap_desc_remove_entry(unsigned long *rmapp,
@@ -754,6 +761,19 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp)
754 return young; 761 return young;
755} 762}
756 763
764#define RMAP_RECYCLE_THRESHOLD 1000
765
766static void rmap_recycle(struct kvm_vcpu *vcpu, gfn_t gfn, int lpage)
767{
768 unsigned long *rmapp;
769
770 gfn = unalias_gfn(vcpu->kvm, gfn);
771 rmapp = gfn_to_rmap(vcpu->kvm, gfn, lpage);
772
773 kvm_unmap_rmapp(vcpu->kvm, rmapp);
774 kvm_flush_remote_tlbs(vcpu->kvm);
775}
776
757int kvm_age_hva(struct kvm *kvm, unsigned long hva) 777int kvm_age_hva(struct kvm *kvm, unsigned long hva)
758{ 778{
759 return kvm_handle_hva(kvm, hva, kvm_age_rmapp); 779 return kvm_handle_hva(kvm, hva, kvm_age_rmapp);
@@ -1407,24 +1427,25 @@ static int kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp)
1407 */ 1427 */
1408void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages) 1428void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages)
1409{ 1429{
1430 int used_pages;
1431
1432 used_pages = kvm->arch.n_alloc_mmu_pages - kvm->arch.n_free_mmu_pages;
1433 used_pages = max(0, used_pages);
1434
1410 /* 1435 /*
1411 * If we set the number of mmu pages to be smaller be than the 1436 * If we set the number of mmu pages to be smaller be than the
1412 * number of actived pages , we must to free some mmu pages before we 1437 * number of actived pages , we must to free some mmu pages before we
1413 * change the value 1438 * change the value
1414 */ 1439 */
1415 1440
1416 if ((kvm->arch.n_alloc_mmu_pages - kvm->arch.n_free_mmu_pages) > 1441 if (used_pages > kvm_nr_mmu_pages) {
1417 kvm_nr_mmu_pages) { 1442 while (used_pages > kvm_nr_mmu_pages) {
1418 int n_used_mmu_pages = kvm->arch.n_alloc_mmu_pages
1419 - kvm->arch.n_free_mmu_pages;
1420
1421 while (n_used_mmu_pages > kvm_nr_mmu_pages) {
1422 struct kvm_mmu_page *page; 1443 struct kvm_mmu_page *page;
1423 1444
1424 page = container_of(kvm->arch.active_mmu_pages.prev, 1445 page = container_of(kvm->arch.active_mmu_pages.prev,
1425 struct kvm_mmu_page, link); 1446 struct kvm_mmu_page, link);
1426 kvm_mmu_zap_page(kvm, page); 1447 kvm_mmu_zap_page(kvm, page);
1427 n_used_mmu_pages--; 1448 used_pages--;
1428 } 1449 }
1429 kvm->arch.n_free_mmu_pages = 0; 1450 kvm->arch.n_free_mmu_pages = 0;
1430 } 1451 }
@@ -1740,6 +1761,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
1740{ 1761{
1741 int was_rmapped = 0; 1762 int was_rmapped = 0;
1742 int was_writeble = is_writeble_pte(*shadow_pte); 1763 int was_writeble = is_writeble_pte(*shadow_pte);
1764 int rmap_count;
1743 1765
1744 pgprintk("%s: spte %llx access %x write_fault %d" 1766 pgprintk("%s: spte %llx access %x write_fault %d"
1745 " user_fault %d gfn %lx\n", 1767 " user_fault %d gfn %lx\n",
@@ -1781,9 +1803,11 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
1781 1803
1782 page_header_update_slot(vcpu->kvm, shadow_pte, gfn); 1804 page_header_update_slot(vcpu->kvm, shadow_pte, gfn);
1783 if (!was_rmapped) { 1805 if (!was_rmapped) {
1784 rmap_add(vcpu, shadow_pte, gfn, largepage); 1806 rmap_count = rmap_add(vcpu, shadow_pte, gfn, largepage);
1785 if (!is_rmap_pte(*shadow_pte)) 1807 if (!is_rmap_pte(*shadow_pte))
1786 kvm_release_pfn_clean(pfn); 1808 kvm_release_pfn_clean(pfn);
1809 if (rmap_count > RMAP_RECYCLE_THRESHOLD)
1810 rmap_recycle(vcpu, gfn, largepage);
1787 } else { 1811 } else {
1788 if (was_writeble) 1812 if (was_writeble)
1789 kvm_release_pfn_dirty(pfn); 1813 kvm_release_pfn_dirty(pfn);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 71510e07e69e..b1f658ad2f06 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -711,6 +711,7 @@ static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
711 svm->vmcb->control.tsc_offset += delta; 711 svm->vmcb->control.tsc_offset += delta;
712 vcpu->cpu = cpu; 712 vcpu->cpu = cpu;
713 kvm_migrate_timers(vcpu); 713 kvm_migrate_timers(vcpu);
714 svm->asid_generation = 0;
714 } 715 }
715 716
716 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) 717 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
@@ -1031,7 +1032,6 @@ static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *svm_data)
1031 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID; 1032 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
1032 } 1033 }
1033 1034
1034 svm->vcpu.cpu = svm_data->cpu;
1035 svm->asid_generation = svm_data->asid_generation; 1035 svm->asid_generation = svm_data->asid_generation;
1036 svm->vmcb->control.asid = svm_data->next_asid++; 1036 svm->vmcb->control.asid = svm_data->next_asid++;
1037} 1037}
@@ -2300,8 +2300,8 @@ static void pre_svm_run(struct vcpu_svm *svm)
2300 struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu); 2300 struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
2301 2301
2302 svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING; 2302 svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
2303 if (svm->vcpu.cpu != cpu || 2303 /* FIXME: handle wraparound of asid_generation */
2304 svm->asid_generation != svm_data->asid_generation) 2304 if (svm->asid_generation != svm_data->asid_generation)
2305 new_asid(svm, svm_data); 2305 new_asid(svm, svm_data);
2306} 2306}
2307 2307
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 356a0ce85c68..29f912927a58 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3157,8 +3157,8 @@ static void handle_invalid_guest_state(struct kvm_vcpu *vcpu,
3157 struct vcpu_vmx *vmx = to_vmx(vcpu); 3157 struct vcpu_vmx *vmx = to_vmx(vcpu);
3158 enum emulation_result err = EMULATE_DONE; 3158 enum emulation_result err = EMULATE_DONE;
3159 3159
3160 preempt_enable();
3161 local_irq_enable(); 3160 local_irq_enable();
3161 preempt_enable();
3162 3162
3163 while (!guest_state_valid(vcpu)) { 3163 while (!guest_state_valid(vcpu)) {
3164 err = emulate_instruction(vcpu, kvm_run, 0, 0, 0); 3164 err = emulate_instruction(vcpu, kvm_run, 0, 0, 0);
@@ -3168,7 +3168,7 @@ static void handle_invalid_guest_state(struct kvm_vcpu *vcpu,
3168 3168
3169 if (err != EMULATE_DONE) { 3169 if (err != EMULATE_DONE) {
3170 kvm_report_emulation_failure(vcpu, "emulation failure"); 3170 kvm_report_emulation_failure(vcpu, "emulation failure");
3171 return; 3171 break;
3172 } 3172 }
3173 3173
3174 if (signal_pending(current)) 3174 if (signal_pending(current))
@@ -3177,8 +3177,8 @@ static void handle_invalid_guest_state(struct kvm_vcpu *vcpu,
3177 schedule(); 3177 schedule();
3178 } 3178 }
3179 3179
3180 local_irq_disable();
3181 preempt_disable(); 3180 preempt_disable();
3181 local_irq_disable();
3182 3182
3183 vmx->invalid_state_emulation_result = err; 3183 vmx->invalid_state_emulation_result = err;
3184} 3184}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index fe5474aec41a..3d4529011828 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -704,11 +704,48 @@ static bool msr_mtrr_valid(unsigned msr)
704 return false; 704 return false;
705} 705}
706 706
707static bool valid_pat_type(unsigned t)
708{
709 return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
710}
711
712static bool valid_mtrr_type(unsigned t)
713{
714 return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
715}
716
717static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
718{
719 int i;
720
721 if (!msr_mtrr_valid(msr))
722 return false;
723
724 if (msr == MSR_IA32_CR_PAT) {
725 for (i = 0; i < 8; i++)
726 if (!valid_pat_type((data >> (i * 8)) & 0xff))
727 return false;
728 return true;
729 } else if (msr == MSR_MTRRdefType) {
730 if (data & ~0xcff)
731 return false;
732 return valid_mtrr_type(data & 0xff);
733 } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
734 for (i = 0; i < 8 ; i++)
735 if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
736 return false;
737 return true;
738 }
739
740 /* variable MTRRs */
741 return valid_mtrr_type(data & 0xff);
742}
743
707static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) 744static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
708{ 745{
709 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; 746 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
710 747
711 if (!msr_mtrr_valid(msr)) 748 if (!mtrr_valid(vcpu, msr, data))
712 return 1; 749 return 1;
713 750
714 if (msr == MSR_MTRRdefType) { 751 if (msr == MSR_MTRRdefType) {
@@ -1079,14 +1116,13 @@ long kvm_arch_dev_ioctl(struct file *filp,
1079 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) 1116 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
1080 goto out; 1117 goto out;
1081 r = -E2BIG; 1118 r = -E2BIG;
1082 if (n < num_msrs_to_save) 1119 if (n < msr_list.nmsrs)
1083 goto out; 1120 goto out;
1084 r = -EFAULT; 1121 r = -EFAULT;
1085 if (copy_to_user(user_msr_list->indices, &msrs_to_save, 1122 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
1086 num_msrs_to_save * sizeof(u32))) 1123 num_msrs_to_save * sizeof(u32)))
1087 goto out; 1124 goto out;
1088 if (copy_to_user(user_msr_list->indices 1125 if (copy_to_user(user_msr_list->indices + num_msrs_to_save,
1089 + num_msrs_to_save * sizeof(u32),
1090 &emulated_msrs, 1126 &emulated_msrs,
1091 ARRAY_SIZE(emulated_msrs) * sizeof(u32))) 1127 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
1092 goto out; 1128 goto out;
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index f2bf1f73d468..d677fa9ca650 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -22,7 +22,8 @@
22 * 22 *
23 * So how does the kernel know it's a Guest? We'll see that later, but let's 23 * So how does the kernel know it's a Guest? We'll see that later, but let's
24 * just say that we end up here where we replace the native functions various 24 * just say that we end up here where we replace the native functions various
25 * "paravirt" structures with our Guest versions, then boot like normal. :*/ 25 * "paravirt" structures with our Guest versions, then boot like normal.
26:*/
26 27
27/* 28/*
28 * Copyright (C) 2006, Rusty Russell <rusty@rustcorp.com.au> IBM Corporation. 29 * Copyright (C) 2006, Rusty Russell <rusty@rustcorp.com.au> IBM Corporation.
@@ -74,7 +75,8 @@
74 * 75 *
75 * The Guest in our tale is a simple creature: identical to the Host but 76 * The Guest in our tale is a simple creature: identical to the Host but
76 * behaving in simplified but equivalent ways. In particular, the Guest is the 77 * behaving in simplified but equivalent ways. In particular, the Guest is the
77 * same kernel as the Host (or at least, built from the same source code). :*/ 78 * same kernel as the Host (or at least, built from the same source code).
79:*/
78 80
79struct lguest_data lguest_data = { 81struct lguest_data lguest_data = {
80 .hcall_status = { [0 ... LHCALL_RING_SIZE-1] = 0xFF }, 82 .hcall_status = { [0 ... LHCALL_RING_SIZE-1] = 0xFF },
@@ -85,7 +87,8 @@ struct lguest_data lguest_data = {
85 .syscall_vec = SYSCALL_VECTOR, 87 .syscall_vec = SYSCALL_VECTOR,
86}; 88};
87 89
88/*G:037 async_hcall() is pretty simple: I'm quite proud of it really. We have a 90/*G:037
91 * async_hcall() is pretty simple: I'm quite proud of it really. We have a
89 * ring buffer of stored hypercalls which the Host will run though next time we 92 * ring buffer of stored hypercalls which the Host will run though next time we
90 * do a normal hypercall. Each entry in the ring has 5 slots for the hypercall 93 * do a normal hypercall. Each entry in the ring has 5 slots for the hypercall
91 * arguments, and a "hcall_status" word which is 0 if the call is ready to go, 94 * arguments, and a "hcall_status" word which is 0 if the call is ready to go,
@@ -94,7 +97,8 @@ struct lguest_data lguest_data = {
94 * If we come around to a slot which hasn't been finished, then the table is 97 * If we come around to a slot which hasn't been finished, then the table is
95 * full and we just make the hypercall directly. This has the nice side 98 * full and we just make the hypercall directly. This has the nice side
96 * effect of causing the Host to run all the stored calls in the ring buffer 99 * effect of causing the Host to run all the stored calls in the ring buffer
97 * which empties it for next time! */ 100 * which empties it for next time!
101 */
98static void async_hcall(unsigned long call, unsigned long arg1, 102static void async_hcall(unsigned long call, unsigned long arg1,
99 unsigned long arg2, unsigned long arg3, 103 unsigned long arg2, unsigned long arg3,
100 unsigned long arg4) 104 unsigned long arg4)
@@ -103,9 +107,11 @@ static void async_hcall(unsigned long call, unsigned long arg1,
103 static unsigned int next_call; 107 static unsigned int next_call;
104 unsigned long flags; 108 unsigned long flags;
105 109
106 /* Disable interrupts if not already disabled: we don't want an 110 /*
111 * Disable interrupts if not already disabled: we don't want an
107 * interrupt handler making a hypercall while we're already doing 112 * interrupt handler making a hypercall while we're already doing
108 * one! */ 113 * one!
114 */
109 local_irq_save(flags); 115 local_irq_save(flags);
110 if (lguest_data.hcall_status[next_call] != 0xFF) { 116 if (lguest_data.hcall_status[next_call] != 0xFF) {
111 /* Table full, so do normal hcall which will flush table. */ 117 /* Table full, so do normal hcall which will flush table. */
@@ -125,8 +131,9 @@ static void async_hcall(unsigned long call, unsigned long arg1,
125 local_irq_restore(flags); 131 local_irq_restore(flags);
126} 132}
127 133
128/*G:035 Notice the lazy_hcall() above, rather than hcall(). This is our first 134/*G:035
129 * real optimization trick! 135 * Notice the lazy_hcall() above, rather than hcall(). This is our first real
136 * optimization trick!
130 * 137 *
131 * When lazy_mode is set, it means we're allowed to defer all hypercalls and do 138 * When lazy_mode is set, it means we're allowed to defer all hypercalls and do
132 * them as a batch when lazy_mode is eventually turned off. Because hypercalls 139 * them as a batch when lazy_mode is eventually turned off. Because hypercalls
@@ -136,7 +143,8 @@ static void async_hcall(unsigned long call, unsigned long arg1,
136 * lguest_leave_lazy_mode(). 143 * lguest_leave_lazy_mode().
137 * 144 *
138 * So, when we're in lazy mode, we call async_hcall() to store the call for 145 * So, when we're in lazy mode, we call async_hcall() to store the call for
139 * future processing: */ 146 * future processing:
147 */
140static void lazy_hcall1(unsigned long call, 148static void lazy_hcall1(unsigned long call,
141 unsigned long arg1) 149 unsigned long arg1)
142{ 150{
@@ -146,6 +154,7 @@ static void lazy_hcall1(unsigned long call,
146 async_hcall(call, arg1, 0, 0, 0); 154 async_hcall(call, arg1, 0, 0, 0);
147} 155}
148 156
157/* You can imagine what lazy_hcall2, 3 and 4 look like. :*/
149static void lazy_hcall2(unsigned long call, 158static void lazy_hcall2(unsigned long call,
150 unsigned long arg1, 159 unsigned long arg1,
151 unsigned long arg2) 160 unsigned long arg2)
@@ -181,8 +190,10 @@ static void lazy_hcall4(unsigned long call,
181} 190}
182#endif 191#endif
183 192
184/* When lazy mode is turned off reset the per-cpu lazy mode variable and then 193/*G:036
185 * issue the do-nothing hypercall to flush any stored calls. */ 194 * When lazy mode is turned off reset the per-cpu lazy mode variable and then
195 * issue the do-nothing hypercall to flush any stored calls.
196:*/
186static void lguest_leave_lazy_mmu_mode(void) 197static void lguest_leave_lazy_mmu_mode(void)
187{ 198{
188 kvm_hypercall0(LHCALL_FLUSH_ASYNC); 199 kvm_hypercall0(LHCALL_FLUSH_ASYNC);
@@ -208,9 +219,11 @@ static void lguest_end_context_switch(struct task_struct *next)
208 * check there before it tries to deliver an interrupt. 219 * check there before it tries to deliver an interrupt.
209 */ 220 */
210 221
211/* save_flags() is expected to return the processor state (ie. "flags"). The 222/*
223 * save_flags() is expected to return the processor state (ie. "flags"). The
212 * flags word contains all kind of stuff, but in practice Linux only cares 224 * flags word contains all kind of stuff, but in practice Linux only cares
213 * about the interrupt flag. Our "save_flags()" just returns that. */ 225 * about the interrupt flag. Our "save_flags()" just returns that.
226 */
214static unsigned long save_fl(void) 227static unsigned long save_fl(void)
215{ 228{
216 return lguest_data.irq_enabled; 229 return lguest_data.irq_enabled;
@@ -222,13 +235,15 @@ static void irq_disable(void)
222 lguest_data.irq_enabled = 0; 235 lguest_data.irq_enabled = 0;
223} 236}
224 237
225/* Let's pause a moment. Remember how I said these are called so often? 238/*
239 * Let's pause a moment. Remember how I said these are called so often?
226 * Jeremy Fitzhardinge optimized them so hard early in 2009 that he had to 240 * Jeremy Fitzhardinge optimized them so hard early in 2009 that he had to
227 * break some rules. In particular, these functions are assumed to save their 241 * break some rules. In particular, these functions are assumed to save their
228 * own registers if they need to: normal C functions assume they can trash the 242 * own registers if they need to: normal C functions assume they can trash the
229 * eax register. To use normal C functions, we use 243 * eax register. To use normal C functions, we use
230 * PV_CALLEE_SAVE_REGS_THUNK(), which pushes %eax onto the stack, calls the 244 * PV_CALLEE_SAVE_REGS_THUNK(), which pushes %eax onto the stack, calls the
231 * C function, then restores it. */ 245 * C function, then restores it.
246 */
232PV_CALLEE_SAVE_REGS_THUNK(save_fl); 247PV_CALLEE_SAVE_REGS_THUNK(save_fl);
233PV_CALLEE_SAVE_REGS_THUNK(irq_disable); 248PV_CALLEE_SAVE_REGS_THUNK(irq_disable);
234/*:*/ 249/*:*/
@@ -237,18 +252,18 @@ PV_CALLEE_SAVE_REGS_THUNK(irq_disable);
237extern void lg_irq_enable(void); 252extern void lg_irq_enable(void);
238extern void lg_restore_fl(unsigned long flags); 253extern void lg_restore_fl(unsigned long flags);
239 254
240/*M:003 Note that we don't check for outstanding interrupts when we re-enable 255/*M:003
241 * them (or when we unmask an interrupt). This seems to work for the moment, 256 * We could be more efficient in our checking of outstanding interrupts, rather
242 * since interrupts are rare and we'll just get the interrupt on the next timer 257 * than using a branch. One way would be to put the "irq_enabled" field in a
243 * tick, but now we can run with CONFIG_NO_HZ, we should revisit this. One way 258 * page by itself, and have the Host write-protect it when an interrupt comes
244 * would be to put the "irq_enabled" field in a page by itself, and have the 259 * in when irqs are disabled. There will then be a page fault as soon as
245 * Host write-protect it when an interrupt comes in when irqs are disabled. 260 * interrupts are re-enabled.
246 * There will then be a page fault as soon as interrupts are re-enabled.
247 * 261 *
248 * A better method is to implement soft interrupt disable generally for x86: 262 * A better method is to implement soft interrupt disable generally for x86:
249 * instead of disabling interrupts, we set a flag. If an interrupt does come 263 * instead of disabling interrupts, we set a flag. If an interrupt does come
250 * in, we then disable them for real. This is uncommon, so we could simply use 264 * in, we then disable them for real. This is uncommon, so we could simply use
251 * a hypercall for interrupt control and not worry about efficiency. :*/ 265 * a hypercall for interrupt control and not worry about efficiency.
266:*/
252 267
253/*G:034 268/*G:034
254 * The Interrupt Descriptor Table (IDT). 269 * The Interrupt Descriptor Table (IDT).
@@ -261,10 +276,12 @@ extern void lg_restore_fl(unsigned long flags);
261static void lguest_write_idt_entry(gate_desc *dt, 276static void lguest_write_idt_entry(gate_desc *dt,
262 int entrynum, const gate_desc *g) 277 int entrynum, const gate_desc *g)
263{ 278{
264 /* The gate_desc structure is 8 bytes long: we hand it to the Host in 279 /*
280 * The gate_desc structure is 8 bytes long: we hand it to the Host in
265 * two 32-bit chunks. The whole 32-bit kernel used to hand descriptors 281 * two 32-bit chunks. The whole 32-bit kernel used to hand descriptors
266 * around like this; typesafety wasn't a big concern in Linux's early 282 * around like this; typesafety wasn't a big concern in Linux's early
267 * years. */ 283 * years.
284 */
268 u32 *desc = (u32 *)g; 285 u32 *desc = (u32 *)g;
269 /* Keep the local copy up to date. */ 286 /* Keep the local copy up to date. */
270 native_write_idt_entry(dt, entrynum, g); 287 native_write_idt_entry(dt, entrynum, g);
@@ -272,9 +289,11 @@ static void lguest_write_idt_entry(gate_desc *dt,
272 kvm_hypercall3(LHCALL_LOAD_IDT_ENTRY, entrynum, desc[0], desc[1]); 289 kvm_hypercall3(LHCALL_LOAD_IDT_ENTRY, entrynum, desc[0], desc[1]);
273} 290}
274 291
275/* Changing to a different IDT is very rare: we keep the IDT up-to-date every 292/*
293 * Changing to a different IDT is very rare: we keep the IDT up-to-date every
276 * time it is written, so we can simply loop through all entries and tell the 294 * time it is written, so we can simply loop through all entries and tell the
277 * Host about them. */ 295 * Host about them.
296 */
278static void lguest_load_idt(const struct desc_ptr *desc) 297static void lguest_load_idt(const struct desc_ptr *desc)
279{ 298{
280 unsigned int i; 299 unsigned int i;
@@ -305,9 +324,11 @@ static void lguest_load_gdt(const struct desc_ptr *desc)
305 kvm_hypercall3(LHCALL_LOAD_GDT_ENTRY, i, gdt[i].a, gdt[i].b); 324 kvm_hypercall3(LHCALL_LOAD_GDT_ENTRY, i, gdt[i].a, gdt[i].b);
306} 325}
307 326
308/* For a single GDT entry which changes, we do the lazy thing: alter our GDT, 327/*
328 * For a single GDT entry which changes, we do the lazy thing: alter our GDT,
309 * then tell the Host to reload the entire thing. This operation is so rare 329 * then tell the Host to reload the entire thing. This operation is so rare
310 * that this naive implementation is reasonable. */ 330 * that this naive implementation is reasonable.
331 */
311static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum, 332static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
312 const void *desc, int type) 333 const void *desc, int type)
313{ 334{
@@ -317,29 +338,36 @@ static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
317 dt[entrynum].a, dt[entrynum].b); 338 dt[entrynum].a, dt[entrynum].b);
318} 339}
319 340
320/* OK, I lied. There are three "thread local storage" GDT entries which change 341/*
342 * OK, I lied. There are three "thread local storage" GDT entries which change
321 * on every context switch (these three entries are how glibc implements 343 * on every context switch (these three entries are how glibc implements
322 * __thread variables). So we have a hypercall specifically for this case. */ 344 * __thread variables). So we have a hypercall specifically for this case.
345 */
323static void lguest_load_tls(struct thread_struct *t, unsigned int cpu) 346static void lguest_load_tls(struct thread_struct *t, unsigned int cpu)
324{ 347{
325 /* There's one problem which normal hardware doesn't have: the Host 348 /*
349 * There's one problem which normal hardware doesn't have: the Host
326 * can't handle us removing entries we're currently using. So we clear 350 * can't handle us removing entries we're currently using. So we clear
327 * the GS register here: if it's needed it'll be reloaded anyway. */ 351 * the GS register here: if it's needed it'll be reloaded anyway.
352 */
328 lazy_load_gs(0); 353 lazy_load_gs(0);
329 lazy_hcall2(LHCALL_LOAD_TLS, __pa(&t->tls_array), cpu); 354 lazy_hcall2(LHCALL_LOAD_TLS, __pa(&t->tls_array), cpu);
330} 355}
331 356
332/*G:038 That's enough excitement for now, back to ploughing through each of 357/*G:038
333 * the different pv_ops structures (we're about 1/3 of the way through). 358 * That's enough excitement for now, back to ploughing through each of the
359 * different pv_ops structures (we're about 1/3 of the way through).
334 * 360 *
335 * This is the Local Descriptor Table, another weird Intel thingy. Linux only 361 * This is the Local Descriptor Table, another weird Intel thingy. Linux only
336 * uses this for some strange applications like Wine. We don't do anything 362 * uses this for some strange applications like Wine. We don't do anything
337 * here, so they'll get an informative and friendly Segmentation Fault. */ 363 * here, so they'll get an informative and friendly Segmentation Fault.
364 */
338static void lguest_set_ldt(const void *addr, unsigned entries) 365static void lguest_set_ldt(const void *addr, unsigned entries)
339{ 366{
340} 367}
341 368
342/* This loads a GDT entry into the "Task Register": that entry points to a 369/*
370 * This loads a GDT entry into the "Task Register": that entry points to a
343 * structure called the Task State Segment. Some comments scattered though the 371 * structure called the Task State Segment. Some comments scattered though the
344 * kernel code indicate that this used for task switching in ages past, along 372 * kernel code indicate that this used for task switching in ages past, along
345 * with blood sacrifice and astrology. 373 * with blood sacrifice and astrology.
@@ -347,19 +375,21 @@ static void lguest_set_ldt(const void *addr, unsigned entries)
347 * Now there's nothing interesting in here that we don't get told elsewhere. 375 * Now there's nothing interesting in here that we don't get told elsewhere.
348 * But the native version uses the "ltr" instruction, which makes the Host 376 * But the native version uses the "ltr" instruction, which makes the Host
349 * complain to the Guest about a Segmentation Fault and it'll oops. So we 377 * complain to the Guest about a Segmentation Fault and it'll oops. So we
350 * override the native version with a do-nothing version. */ 378 * override the native version with a do-nothing version.
379 */
351static void lguest_load_tr_desc(void) 380static void lguest_load_tr_desc(void)
352{ 381{
353} 382}
354 383
355/* The "cpuid" instruction is a way of querying both the CPU identity 384/*
385 * The "cpuid" instruction is a way of querying both the CPU identity
356 * (manufacturer, model, etc) and its features. It was introduced before the 386 * (manufacturer, model, etc) and its features. It was introduced before the
357 * Pentium in 1993 and keeps getting extended by both Intel, AMD and others. 387 * Pentium in 1993 and keeps getting extended by both Intel, AMD and others.
358 * As you might imagine, after a decade and a half this treatment, it is now a 388 * As you might imagine, after a decade and a half this treatment, it is now a
359 * giant ball of hair. Its entry in the current Intel manual runs to 28 pages. 389 * giant ball of hair. Its entry in the current Intel manual runs to 28 pages.
360 * 390 *
361 * This instruction even it has its own Wikipedia entry. The Wikipedia entry 391 * This instruction even it has its own Wikipedia entry. The Wikipedia entry
362 * has been translated into 4 languages. I am not making this up! 392 * has been translated into 5 languages. I am not making this up!
363 * 393 *
364 * We could get funky here and identify ourselves as "GenuineLguest", but 394 * We could get funky here and identify ourselves as "GenuineLguest", but
365 * instead we just use the real "cpuid" instruction. Then I pretty much turned 395 * instead we just use the real "cpuid" instruction. Then I pretty much turned
@@ -371,7 +401,8 @@ static void lguest_load_tr_desc(void)
371 * Replacing the cpuid so we can turn features off is great for the kernel, but 401 * Replacing the cpuid so we can turn features off is great for the kernel, but
372 * anyone (including userspace) can just use the raw "cpuid" instruction and 402 * anyone (including userspace) can just use the raw "cpuid" instruction and
373 * the Host won't even notice since it isn't privileged. So we try not to get 403 * the Host won't even notice since it isn't privileged. So we try not to get
374 * too worked up about it. */ 404 * too worked up about it.
405 */
375static void lguest_cpuid(unsigned int *ax, unsigned int *bx, 406static void lguest_cpuid(unsigned int *ax, unsigned int *bx,
376 unsigned int *cx, unsigned int *dx) 407 unsigned int *cx, unsigned int *dx)
377{ 408{
@@ -379,43 +410,63 @@ static void lguest_cpuid(unsigned int *ax, unsigned int *bx,
379 410
380 native_cpuid(ax, bx, cx, dx); 411 native_cpuid(ax, bx, cx, dx);
381 switch (function) { 412 switch (function) {
382 case 0: /* ID and highest CPUID. Futureproof a little by sticking to 413 /*
383 * older ones. */ 414 * CPUID 0 gives the highest legal CPUID number (and the ID string).
415 * We futureproof our code a little by sticking to known CPUID values.
416 */
417 case 0:
384 if (*ax > 5) 418 if (*ax > 5)
385 *ax = 5; 419 *ax = 5;
386 break; 420 break;
387 case 1: /* Basic feature request. */ 421
388 /* We only allow kernel to see SSE3, CMPXCHG16B and SSSE3 */ 422 /*
423 * CPUID 1 is a basic feature request.
424 *
425 * CX: we only allow kernel to see SSE3, CMPXCHG16B and SSSE3
426 * DX: SSE, SSE2, FXSR, MMX, CMOV, CMPXCHG8B, TSC, FPU and PAE.
427 */
428 case 1:
389 *cx &= 0x00002201; 429 *cx &= 0x00002201;
390 /* SSE, SSE2, FXSR, MMX, CMOV, CMPXCHG8B, TSC, FPU, PAE. */
391 *dx &= 0x07808151; 430 *dx &= 0x07808151;
392 /* The Host can do a nice optimization if it knows that the 431 /*
432 * The Host can do a nice optimization if it knows that the
393 * kernel mappings (addresses above 0xC0000000 or whatever 433 * kernel mappings (addresses above 0xC0000000 or whatever
394 * PAGE_OFFSET is set to) haven't changed. But Linux calls 434 * PAGE_OFFSET is set to) haven't changed. But Linux calls
395 * flush_tlb_user() for both user and kernel mappings unless 435 * flush_tlb_user() for both user and kernel mappings unless
396 * the Page Global Enable (PGE) feature bit is set. */ 436 * the Page Global Enable (PGE) feature bit is set.
437 */
397 *dx |= 0x00002000; 438 *dx |= 0x00002000;
398 /* We also lie, and say we're family id 5. 6 or greater 439 /*
440 * We also lie, and say we're family id 5. 6 or greater
399 * leads to a rdmsr in early_init_intel which we can't handle. 441 * leads to a rdmsr in early_init_intel which we can't handle.
400 * Family ID is returned as bits 8-12 in ax. */ 442 * Family ID is returned as bits 8-12 in ax.
443 */
401 *ax &= 0xFFFFF0FF; 444 *ax &= 0xFFFFF0FF;
402 *ax |= 0x00000500; 445 *ax |= 0x00000500;
403 break; 446 break;
447 /*
448 * 0x80000000 returns the highest Extended Function, so we futureproof
449 * like we do above by limiting it to known fields.
450 */
404 case 0x80000000: 451 case 0x80000000:
405 /* Futureproof this a little: if they ask how much extended
406 * processor information there is, limit it to known fields. */
407 if (*ax > 0x80000008) 452 if (*ax > 0x80000008)
408 *ax = 0x80000008; 453 *ax = 0x80000008;
409 break; 454 break;
455
456 /*
457 * PAE systems can mark pages as non-executable. Linux calls this the
458 * NX bit. Intel calls it XD (eXecute Disable), AMD EVP (Enhanced
459 * Virus Protection). We just switch turn if off here, since we don't
460 * support it.
461 */
410 case 0x80000001: 462 case 0x80000001:
411 /* Here we should fix nx cap depending on host. */
412 /* For this version of PAE, we just clear NX bit. */
413 *dx &= ~(1 << 20); 463 *dx &= ~(1 << 20);
414 break; 464 break;
415 } 465 }
416} 466}
417 467
418/* Intel has four control registers, imaginatively named cr0, cr2, cr3 and cr4. 468/*
469 * Intel has four control registers, imaginatively named cr0, cr2, cr3 and cr4.
419 * I assume there's a cr1, but it hasn't bothered us yet, so we'll not bother 470 * I assume there's a cr1, but it hasn't bothered us yet, so we'll not bother
420 * it. The Host needs to know when the Guest wants to change them, so we have 471 * it. The Host needs to know when the Guest wants to change them, so we have
421 * a whole series of functions like read_cr0() and write_cr0(). 472 * a whole series of functions like read_cr0() and write_cr0().
@@ -430,7 +481,8 @@ static void lguest_cpuid(unsigned int *ax, unsigned int *bx,
430 * name like "FPUTRAP bit" be a little less cryptic? 481 * name like "FPUTRAP bit" be a little less cryptic?
431 * 482 *
432 * We store cr0 locally because the Host never changes it. The Guest sometimes 483 * We store cr0 locally because the Host never changes it. The Guest sometimes
433 * wants to read it and we'd prefer not to bother the Host unnecessarily. */ 484 * wants to read it and we'd prefer not to bother the Host unnecessarily.
485 */
434static unsigned long current_cr0; 486static unsigned long current_cr0;
435static void lguest_write_cr0(unsigned long val) 487static void lguest_write_cr0(unsigned long val)
436{ 488{
@@ -443,18 +495,22 @@ static unsigned long lguest_read_cr0(void)
443 return current_cr0; 495 return current_cr0;
444} 496}
445 497
446/* Intel provided a special instruction to clear the TS bit for people too cool 498/*
499 * Intel provided a special instruction to clear the TS bit for people too cool
447 * to use write_cr0() to do it. This "clts" instruction is faster, because all 500 * to use write_cr0() to do it. This "clts" instruction is faster, because all
448 * the vowels have been optimized out. */ 501 * the vowels have been optimized out.
502 */
449static void lguest_clts(void) 503static void lguest_clts(void)
450{ 504{
451 lazy_hcall1(LHCALL_TS, 0); 505 lazy_hcall1(LHCALL_TS, 0);
452 current_cr0 &= ~X86_CR0_TS; 506 current_cr0 &= ~X86_CR0_TS;
453} 507}
454 508
455/* cr2 is the virtual address of the last page fault, which the Guest only ever 509/*
510 * cr2 is the virtual address of the last page fault, which the Guest only ever
456 * reads. The Host kindly writes this into our "struct lguest_data", so we 511 * reads. The Host kindly writes this into our "struct lguest_data", so we
457 * just read it out of there. */ 512 * just read it out of there.
513 */
458static unsigned long lguest_read_cr2(void) 514static unsigned long lguest_read_cr2(void)
459{ 515{
460 return lguest_data.cr2; 516 return lguest_data.cr2;
@@ -463,10 +519,12 @@ static unsigned long lguest_read_cr2(void)
463/* See lguest_set_pte() below. */ 519/* See lguest_set_pte() below. */
464static bool cr3_changed = false; 520static bool cr3_changed = false;
465 521
466/* cr3 is the current toplevel pagetable page: the principle is the same as 522/*
523 * cr3 is the current toplevel pagetable page: the principle is the same as
467 * cr0. Keep a local copy, and tell the Host when it changes. The only 524 * cr0. Keep a local copy, and tell the Host when it changes. The only
468 * difference is that our local copy is in lguest_data because the Host needs 525 * difference is that our local copy is in lguest_data because the Host needs
469 * to set it upon our initial hypercall. */ 526 * to set it upon our initial hypercall.
527 */
470static void lguest_write_cr3(unsigned long cr3) 528static void lguest_write_cr3(unsigned long cr3)
471{ 529{
472 lguest_data.pgdir = cr3; 530 lguest_data.pgdir = cr3;
@@ -511,7 +569,7 @@ static void lguest_write_cr4(unsigned long val)
511 * cr3 ---> +---------+ 569 * cr3 ---> +---------+
512 * | --------->+---------+ 570 * | --------->+---------+
513 * | | | PADDR1 | 571 * | | | PADDR1 |
514 * Top-level | | PADDR2 | 572 * Mid-level | | PADDR2 |
515 * (PMD) page | | | 573 * (PMD) page | | |
516 * | | Lower-level | 574 * | | Lower-level |
517 * | | (PTE) page | 575 * | | (PTE) page |
@@ -531,21 +589,62 @@ static void lguest_write_cr4(unsigned long val)
531 * Index into top Index into second Offset within page 589 * Index into top Index into second Offset within page
532 * page directory page pagetable page 590 * page directory page pagetable page
533 * 591 *
534 * The kernel spends a lot of time changing both the top-level page directory 592 * Now, unfortunately, this isn't the whole story: Intel added Physical Address
535 * and lower-level pagetable pages. The Guest doesn't know physical addresses, 593 * Extension (PAE) to allow 32 bit systems to use 64GB of memory (ie. 36 bits).
536 * so while it maintains these page tables exactly like normal, it also needs 594 * These are held in 64-bit page table entries, so we can now only fit 512
537 * to keep the Host informed whenever it makes a change: the Host will create 595 * entries in a page, and the neat three-level tree breaks down.
538 * the real page tables based on the Guests'. 596 *
597 * The result is a four level page table:
598 *
599 * cr3 --> [ 4 Upper ]
600 * [ Level ]
601 * [ Entries ]
602 * [(PUD Page)]---> +---------+
603 * | --------->+---------+
604 * | | | PADDR1 |
605 * Mid-level | | PADDR2 |
606 * (PMD) page | | |
607 * | | Lower-level |
608 * | | (PTE) page |
609 * | | | |
610 * .... ....
611 *
612 *
613 * And the virtual address is decoded as:
614 *
615 * 1 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
616 * |<-2->|<--- 9 bits ---->|<---- 9 bits --->|<------ 12 bits ------>|
617 * Index into Index into mid Index into lower Offset within page
618 * top entries directory page pagetable page
619 *
620 * It's too hard to switch between these two formats at runtime, so Linux only
621 * supports one or the other depending on whether CONFIG_X86_PAE is set. Many
622 * distributions turn it on, and not just for people with silly amounts of
623 * memory: the larger PTE entries allow room for the NX bit, which lets the
624 * kernel disable execution of pages and increase security.
625 *
626 * This was a problem for lguest, which couldn't run on these distributions;
627 * then Matias Zabaljauregui figured it all out and implemented it, and only a
628 * handful of puppies were crushed in the process!
629 *
630 * Back to our point: the kernel spends a lot of time changing both the
631 * top-level page directory and lower-level pagetable pages. The Guest doesn't
632 * know physical addresses, so while it maintains these page tables exactly
633 * like normal, it also needs to keep the Host informed whenever it makes a
634 * change: the Host will create the real page tables based on the Guests'.
539 */ 635 */
540 636
541/* The Guest calls this to set a second-level entry (pte), ie. to map a page 637/*
542 * into a process' address space. We set the entry then tell the Host the 638 * The Guest calls this after it has set a second-level entry (pte), ie. to map
543 * toplevel and address this corresponds to. The Guest uses one pagetable per 639 * a page into a process' address space. Wetell the Host the toplevel and
544 * process, so we need to tell the Host which one we're changing (mm->pgd). */ 640 * address this corresponds to. The Guest uses one pagetable per process, so
641 * we need to tell the Host which one we're changing (mm->pgd).
642 */
545static void lguest_pte_update(struct mm_struct *mm, unsigned long addr, 643static void lguest_pte_update(struct mm_struct *mm, unsigned long addr,
546 pte_t *ptep) 644 pte_t *ptep)
547{ 645{
548#ifdef CONFIG_X86_PAE 646#ifdef CONFIG_X86_PAE
647 /* PAE needs to hand a 64 bit page table entry, so it uses two args. */
549 lazy_hcall4(LHCALL_SET_PTE, __pa(mm->pgd), addr, 648 lazy_hcall4(LHCALL_SET_PTE, __pa(mm->pgd), addr,
550 ptep->pte_low, ptep->pte_high); 649 ptep->pte_low, ptep->pte_high);
551#else 650#else
@@ -553,6 +652,7 @@ static void lguest_pte_update(struct mm_struct *mm, unsigned long addr,
553#endif 652#endif
554} 653}
555 654
655/* This is the "set and update" combo-meal-deal version. */
556static void lguest_set_pte_at(struct mm_struct *mm, unsigned long addr, 656static void lguest_set_pte_at(struct mm_struct *mm, unsigned long addr,
557 pte_t *ptep, pte_t pteval) 657 pte_t *ptep, pte_t pteval)
558{ 658{
@@ -560,10 +660,13 @@ static void lguest_set_pte_at(struct mm_struct *mm, unsigned long addr,
560 lguest_pte_update(mm, addr, ptep); 660 lguest_pte_update(mm, addr, ptep);
561} 661}
562 662
563/* The Guest calls lguest_set_pud to set a top-level entry and lguest_set_pmd 663/*
664 * The Guest calls lguest_set_pud to set a top-level entry and lguest_set_pmd
564 * to set a middle-level entry when PAE is activated. 665 * to set a middle-level entry when PAE is activated.
666 *
565 * Again, we set the entry then tell the Host which page we changed, 667 * Again, we set the entry then tell the Host which page we changed,
566 * and the index of the entry we changed. */ 668 * and the index of the entry we changed.
669 */
567#ifdef CONFIG_X86_PAE 670#ifdef CONFIG_X86_PAE
568static void lguest_set_pud(pud_t *pudp, pud_t pudval) 671static void lguest_set_pud(pud_t *pudp, pud_t pudval)
569{ 672{
@@ -582,8 +685,7 @@ static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval)
582} 685}
583#else 686#else
584 687
585/* The Guest calls lguest_set_pmd to set a top-level entry when PAE is not 688/* The Guest calls lguest_set_pmd to set a top-level entry when !PAE. */
586 * activated. */
587static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval) 689static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval)
588{ 690{
589 native_set_pmd(pmdp, pmdval); 691 native_set_pmd(pmdp, pmdval);
@@ -592,7 +694,8 @@ static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval)
592} 694}
593#endif 695#endif
594 696
595/* There are a couple of legacy places where the kernel sets a PTE, but we 697/*
698 * There are a couple of legacy places where the kernel sets a PTE, but we
596 * don't know the top level any more. This is useless for us, since we don't 699 * don't know the top level any more. This is useless for us, since we don't
597 * know which pagetable is changing or what address, so we just tell the Host 700 * know which pagetable is changing or what address, so we just tell the Host
598 * to forget all of them. Fortunately, this is very rare. 701 * to forget all of them. Fortunately, this is very rare.
@@ -600,7 +703,8 @@ static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval)
600 * ... except in early boot when the kernel sets up the initial pagetables, 703 * ... except in early boot when the kernel sets up the initial pagetables,
601 * which makes booting astonishingly slow: 1.83 seconds! So we don't even tell 704 * which makes booting astonishingly slow: 1.83 seconds! So we don't even tell
602 * the Host anything changed until we've done the first page table switch, 705 * the Host anything changed until we've done the first page table switch,
603 * which brings boot back to 0.25 seconds. */ 706 * which brings boot back to 0.25 seconds.
707 */
604static void lguest_set_pte(pte_t *ptep, pte_t pteval) 708static void lguest_set_pte(pte_t *ptep, pte_t pteval)
605{ 709{
606 native_set_pte(ptep, pteval); 710 native_set_pte(ptep, pteval);
@@ -609,6 +713,11 @@ static void lguest_set_pte(pte_t *ptep, pte_t pteval)
609} 713}
610 714
611#ifdef CONFIG_X86_PAE 715#ifdef CONFIG_X86_PAE
716/*
717 * With 64-bit PTE values, we need to be careful setting them: if we set 32
718 * bits at a time, the hardware could see a weird half-set entry. These
719 * versions ensure we update all 64 bits at once.
720 */
612static void lguest_set_pte_atomic(pte_t *ptep, pte_t pte) 721static void lguest_set_pte_atomic(pte_t *ptep, pte_t pte)
613{ 722{
614 native_set_pte_atomic(ptep, pte); 723 native_set_pte_atomic(ptep, pte);
@@ -616,19 +725,21 @@ static void lguest_set_pte_atomic(pte_t *ptep, pte_t pte)
616 lazy_hcall1(LHCALL_FLUSH_TLB, 1); 725 lazy_hcall1(LHCALL_FLUSH_TLB, 1);
617} 726}
618 727
619void lguest_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) 728static void lguest_pte_clear(struct mm_struct *mm, unsigned long addr,
729 pte_t *ptep)
620{ 730{
621 native_pte_clear(mm, addr, ptep); 731 native_pte_clear(mm, addr, ptep);
622 lguest_pte_update(mm, addr, ptep); 732 lguest_pte_update(mm, addr, ptep);
623} 733}
624 734
625void lguest_pmd_clear(pmd_t *pmdp) 735static void lguest_pmd_clear(pmd_t *pmdp)
626{ 736{
627 lguest_set_pmd(pmdp, __pmd(0)); 737 lguest_set_pmd(pmdp, __pmd(0));
628} 738}
629#endif 739#endif
630 740
631/* Unfortunately for Lguest, the pv_mmu_ops for page tables were based on 741/*
742 * Unfortunately for Lguest, the pv_mmu_ops for page tables were based on
632 * native page table operations. On native hardware you can set a new page 743 * native page table operations. On native hardware you can set a new page
633 * table entry whenever you want, but if you want to remove one you have to do 744 * table entry whenever you want, but if you want to remove one you have to do
634 * a TLB flush (a TLB is a little cache of page table entries kept by the CPU). 745 * a TLB flush (a TLB is a little cache of page table entries kept by the CPU).
@@ -637,24 +748,29 @@ void lguest_pmd_clear(pmd_t *pmdp)
637 * called when a valid entry is written, not when it's removed (ie. marked not 748 * called when a valid entry is written, not when it's removed (ie. marked not
638 * present). Instead, this is where we come when the Guest wants to remove a 749 * present). Instead, this is where we come when the Guest wants to remove a
639 * page table entry: we tell the Host to set that entry to 0 (ie. the present 750 * page table entry: we tell the Host to set that entry to 0 (ie. the present
640 * bit is zero). */ 751 * bit is zero).
752 */
641static void lguest_flush_tlb_single(unsigned long addr) 753static void lguest_flush_tlb_single(unsigned long addr)
642{ 754{
643 /* Simply set it to zero: if it was not, it will fault back in. */ 755 /* Simply set it to zero: if it was not, it will fault back in. */
644 lazy_hcall3(LHCALL_SET_PTE, lguest_data.pgdir, addr, 0); 756 lazy_hcall3(LHCALL_SET_PTE, lguest_data.pgdir, addr, 0);
645} 757}
646 758
647/* This is what happens after the Guest has removed a large number of entries. 759/*
760 * This is what happens after the Guest has removed a large number of entries.
648 * This tells the Host that any of the page table entries for userspace might 761 * This tells the Host that any of the page table entries for userspace might
649 * have changed, ie. virtual addresses below PAGE_OFFSET. */ 762 * have changed, ie. virtual addresses below PAGE_OFFSET.
763 */
650static void lguest_flush_tlb_user(void) 764static void lguest_flush_tlb_user(void)
651{ 765{
652 lazy_hcall1(LHCALL_FLUSH_TLB, 0); 766 lazy_hcall1(LHCALL_FLUSH_TLB, 0);
653} 767}
654 768
655/* This is called when the kernel page tables have changed. That's not very 769/*
770 * This is called when the kernel page tables have changed. That's not very
656 * common (unless the Guest is using highmem, which makes the Guest extremely 771 * common (unless the Guest is using highmem, which makes the Guest extremely
657 * slow), so it's worth separating this from the user flushing above. */ 772 * slow), so it's worth separating this from the user flushing above.
773 */
658static void lguest_flush_tlb_kernel(void) 774static void lguest_flush_tlb_kernel(void)
659{ 775{
660 lazy_hcall1(LHCALL_FLUSH_TLB, 1); 776 lazy_hcall1(LHCALL_FLUSH_TLB, 1);
@@ -691,26 +807,38 @@ static struct irq_chip lguest_irq_controller = {
691 .unmask = enable_lguest_irq, 807 .unmask = enable_lguest_irq,
692}; 808};
693 809
694/* This sets up the Interrupt Descriptor Table (IDT) entry for each hardware 810/*
811 * This sets up the Interrupt Descriptor Table (IDT) entry for each hardware
695 * interrupt (except 128, which is used for system calls), and then tells the 812 * interrupt (except 128, which is used for system calls), and then tells the
696 * Linux infrastructure that each interrupt is controlled by our level-based 813 * Linux infrastructure that each interrupt is controlled by our level-based
697 * lguest interrupt controller. */ 814 * lguest interrupt controller.
815 */
698static void __init lguest_init_IRQ(void) 816static void __init lguest_init_IRQ(void)
699{ 817{
700 unsigned int i; 818 unsigned int i;
701 819
702 for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) { 820 for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
703 /* Some systems map "vectors" to interrupts weirdly. Lguest has 821 /* Some systems map "vectors" to interrupts weirdly. Not us! */
704 * a straightforward 1 to 1 mapping, so force that here. */
705 __get_cpu_var(vector_irq)[i] = i - FIRST_EXTERNAL_VECTOR; 822 __get_cpu_var(vector_irq)[i] = i - FIRST_EXTERNAL_VECTOR;
706 if (i != SYSCALL_VECTOR) 823 if (i != SYSCALL_VECTOR)
707 set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]); 824 set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]);
708 } 825 }
709 /* This call is required to set up for 4k stacks, where we have 826
710 * separate stacks for hard and soft interrupts. */ 827 /*
828 * This call is required to set up for 4k stacks, where we have
829 * separate stacks for hard and soft interrupts.
830 */
711 irq_ctx_init(smp_processor_id()); 831 irq_ctx_init(smp_processor_id());
712} 832}
713 833
834/*
835 * With CONFIG_SPARSE_IRQ, interrupt descriptors are allocated as-needed, so
836 * rather than set them in lguest_init_IRQ we are called here every time an
837 * lguest device needs an interrupt.
838 *
839 * FIXME: irq_to_desc_alloc_node() can fail due to lack of memory, we should
840 * pass that up!
841 */
714void lguest_setup_irq(unsigned int irq) 842void lguest_setup_irq(unsigned int irq)
715{ 843{
716 irq_to_desc_alloc_node(irq, 0); 844 irq_to_desc_alloc_node(irq, 0);
@@ -729,31 +857,39 @@ static unsigned long lguest_get_wallclock(void)
729 return lguest_data.time.tv_sec; 857 return lguest_data.time.tv_sec;
730} 858}
731 859
732/* The TSC is an Intel thing called the Time Stamp Counter. The Host tells us 860/*
861 * The TSC is an Intel thing called the Time Stamp Counter. The Host tells us
733 * what speed it runs at, or 0 if it's unusable as a reliable clock source. 862 * what speed it runs at, or 0 if it's unusable as a reliable clock source.
734 * This matches what we want here: if we return 0 from this function, the x86 863 * This matches what we want here: if we return 0 from this function, the x86
735 * TSC clock will give up and not register itself. */ 864 * TSC clock will give up and not register itself.
865 */
736static unsigned long lguest_tsc_khz(void) 866static unsigned long lguest_tsc_khz(void)
737{ 867{
738 return lguest_data.tsc_khz; 868 return lguest_data.tsc_khz;
739} 869}
740 870
741/* If we can't use the TSC, the kernel falls back to our lower-priority 871/*
742 * "lguest_clock", where we read the time value given to us by the Host. */ 872 * If we can't use the TSC, the kernel falls back to our lower-priority
873 * "lguest_clock", where we read the time value given to us by the Host.
874 */
743static cycle_t lguest_clock_read(struct clocksource *cs) 875static cycle_t lguest_clock_read(struct clocksource *cs)
744{ 876{
745 unsigned long sec, nsec; 877 unsigned long sec, nsec;
746 878
747 /* Since the time is in two parts (seconds and nanoseconds), we risk 879 /*
880 * Since the time is in two parts (seconds and nanoseconds), we risk
748 * reading it just as it's changing from 99 & 0.999999999 to 100 and 0, 881 * reading it just as it's changing from 99 & 0.999999999 to 100 and 0,
749 * and getting 99 and 0. As Linux tends to come apart under the stress 882 * and getting 99 and 0. As Linux tends to come apart under the stress
750 * of time travel, we must be careful: */ 883 * of time travel, we must be careful:
884 */
751 do { 885 do {
752 /* First we read the seconds part. */ 886 /* First we read the seconds part. */
753 sec = lguest_data.time.tv_sec; 887 sec = lguest_data.time.tv_sec;
754 /* This read memory barrier tells the compiler and the CPU that 888 /*
889 * This read memory barrier tells the compiler and the CPU that
755 * this can't be reordered: we have to complete the above 890 * this can't be reordered: we have to complete the above
756 * before going on. */ 891 * before going on.
892 */
757 rmb(); 893 rmb();
758 /* Now we read the nanoseconds part. */ 894 /* Now we read the nanoseconds part. */
759 nsec = lguest_data.time.tv_nsec; 895 nsec = lguest_data.time.tv_nsec;
@@ -777,9 +913,11 @@ static struct clocksource lguest_clock = {
777 .flags = CLOCK_SOURCE_IS_CONTINUOUS, 913 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
778}; 914};
779 915
780/* We also need a "struct clock_event_device": Linux asks us to set it to go 916/*
917 * We also need a "struct clock_event_device": Linux asks us to set it to go
781 * off some time in the future. Actually, James Morris figured all this out, I 918 * off some time in the future. Actually, James Morris figured all this out, I
782 * just applied the patch. */ 919 * just applied the patch.
920 */
783static int lguest_clockevent_set_next_event(unsigned long delta, 921static int lguest_clockevent_set_next_event(unsigned long delta,
784 struct clock_event_device *evt) 922 struct clock_event_device *evt)
785{ 923{
@@ -829,8 +967,10 @@ static struct clock_event_device lguest_clockevent = {
829 .max_delta_ns = LG_CLOCK_MAX_DELTA, 967 .max_delta_ns = LG_CLOCK_MAX_DELTA,
830}; 968};
831 969
832/* This is the Guest timer interrupt handler (hardware interrupt 0). We just 970/*
833 * call the clockevent infrastructure and it does whatever needs doing. */ 971 * This is the Guest timer interrupt handler (hardware interrupt 0). We just
972 * call the clockevent infrastructure and it does whatever needs doing.
973 */
834static void lguest_time_irq(unsigned int irq, struct irq_desc *desc) 974static void lguest_time_irq(unsigned int irq, struct irq_desc *desc)
835{ 975{
836 unsigned long flags; 976 unsigned long flags;
@@ -841,10 +981,12 @@ static void lguest_time_irq(unsigned int irq, struct irq_desc *desc)
841 local_irq_restore(flags); 981 local_irq_restore(flags);
842} 982}
843 983
844/* At some point in the boot process, we get asked to set up our timing 984/*
985 * At some point in the boot process, we get asked to set up our timing
845 * infrastructure. The kernel doesn't expect timer interrupts before this, but 986 * infrastructure. The kernel doesn't expect timer interrupts before this, but
846 * we cleverly initialized the "blocked_interrupts" field of "struct 987 * we cleverly initialized the "blocked_interrupts" field of "struct
847 * lguest_data" so that timer interrupts were blocked until now. */ 988 * lguest_data" so that timer interrupts were blocked until now.
989 */
848static void lguest_time_init(void) 990static void lguest_time_init(void)
849{ 991{
850 /* Set up the timer interrupt (0) to go to our simple timer routine */ 992 /* Set up the timer interrupt (0) to go to our simple timer routine */
@@ -868,14 +1010,16 @@ static void lguest_time_init(void)
868 * to work. They're pretty simple. 1010 * to work. They're pretty simple.
869 */ 1011 */
870 1012
871/* The Guest needs to tell the Host what stack it expects traps to use. For 1013/*
1014 * The Guest needs to tell the Host what stack it expects traps to use. For
872 * native hardware, this is part of the Task State Segment mentioned above in 1015 * native hardware, this is part of the Task State Segment mentioned above in
873 * lguest_load_tr_desc(), but to help hypervisors there's this special call. 1016 * lguest_load_tr_desc(), but to help hypervisors there's this special call.
874 * 1017 *
875 * We tell the Host the segment we want to use (__KERNEL_DS is the kernel data 1018 * We tell the Host the segment we want to use (__KERNEL_DS is the kernel data
876 * segment), the privilege level (we're privilege level 1, the Host is 0 and 1019 * segment), the privilege level (we're privilege level 1, the Host is 0 and
877 * will not tolerate us trying to use that), the stack pointer, and the number 1020 * will not tolerate us trying to use that), the stack pointer, and the number
878 * of pages in the stack. */ 1021 * of pages in the stack.
1022 */
879static void lguest_load_sp0(struct tss_struct *tss, 1023static void lguest_load_sp0(struct tss_struct *tss,
880 struct thread_struct *thread) 1024 struct thread_struct *thread)
881{ 1025{
@@ -889,7 +1033,8 @@ static void lguest_set_debugreg(int regno, unsigned long value)
889 /* FIXME: Implement */ 1033 /* FIXME: Implement */
890} 1034}
891 1035
892/* There are times when the kernel wants to make sure that no memory writes are 1036/*
1037 * There are times when the kernel wants to make sure that no memory writes are
893 * caught in the cache (that they've all reached real hardware devices). This 1038 * caught in the cache (that they've all reached real hardware devices). This
894 * doesn't matter for the Guest which has virtual hardware. 1039 * doesn't matter for the Guest which has virtual hardware.
895 * 1040 *
@@ -903,11 +1048,13 @@ static void lguest_wbinvd(void)
903{ 1048{
904} 1049}
905 1050
906/* If the Guest expects to have an Advanced Programmable Interrupt Controller, 1051/*
1052 * If the Guest expects to have an Advanced Programmable Interrupt Controller,
907 * we play dumb by ignoring writes and returning 0 for reads. So it's no 1053 * we play dumb by ignoring writes and returning 0 for reads. So it's no
908 * longer Programmable nor Controlling anything, and I don't think 8 lines of 1054 * longer Programmable nor Controlling anything, and I don't think 8 lines of
909 * code qualifies for Advanced. It will also never interrupt anything. It 1055 * code qualifies for Advanced. It will also never interrupt anything. It
910 * does, however, allow us to get through the Linux boot code. */ 1056 * does, however, allow us to get through the Linux boot code.
1057 */
911#ifdef CONFIG_X86_LOCAL_APIC 1058#ifdef CONFIG_X86_LOCAL_APIC
912static void lguest_apic_write(u32 reg, u32 v) 1059static void lguest_apic_write(u32 reg, u32 v)
913{ 1060{
@@ -956,11 +1103,13 @@ static void lguest_safe_halt(void)
956 kvm_hypercall0(LHCALL_HALT); 1103 kvm_hypercall0(LHCALL_HALT);
957} 1104}
958 1105
959/* The SHUTDOWN hypercall takes a string to describe what's happening, and 1106/*
1107 * The SHUTDOWN hypercall takes a string to describe what's happening, and
960 * an argument which says whether this to restart (reboot) the Guest or not. 1108 * an argument which says whether this to restart (reboot) the Guest or not.
961 * 1109 *
962 * Note that the Host always prefers that the Guest speak in physical addresses 1110 * Note that the Host always prefers that the Guest speak in physical addresses
963 * rather than virtual addresses, so we use __pa() here. */ 1111 * rather than virtual addresses, so we use __pa() here.
1112 */
964static void lguest_power_off(void) 1113static void lguest_power_off(void)
965{ 1114{
966 kvm_hypercall2(LHCALL_SHUTDOWN, __pa("Power down"), 1115 kvm_hypercall2(LHCALL_SHUTDOWN, __pa("Power down"),
@@ -991,8 +1140,10 @@ static __init char *lguest_memory_setup(void)
991 * nice to move it back to lguest_init. Patch welcome... */ 1140 * nice to move it back to lguest_init. Patch welcome... */
992 atomic_notifier_chain_register(&panic_notifier_list, &paniced); 1141 atomic_notifier_chain_register(&panic_notifier_list, &paniced);
993 1142
994 /* The Linux bootloader header contains an "e820" memory map: the 1143 /*
995 * Launcher populated the first entry with our memory limit. */ 1144 *The Linux bootloader header contains an "e820" memory map: the
1145 * Launcher populated the first entry with our memory limit.
1146 */
996 e820_add_region(boot_params.e820_map[0].addr, 1147 e820_add_region(boot_params.e820_map[0].addr,
997 boot_params.e820_map[0].size, 1148 boot_params.e820_map[0].size,
998 boot_params.e820_map[0].type); 1149 boot_params.e820_map[0].type);
@@ -1001,16 +1152,17 @@ static __init char *lguest_memory_setup(void)
1001 return "LGUEST"; 1152 return "LGUEST";
1002} 1153}
1003 1154
1004/* We will eventually use the virtio console device to produce console output, 1155/*
1156 * We will eventually use the virtio console device to produce console output,
1005 * but before that is set up we use LHCALL_NOTIFY on normal memory to produce 1157 * but before that is set up we use LHCALL_NOTIFY on normal memory to produce
1006 * console output. */ 1158 * console output.
1159 */
1007static __init int early_put_chars(u32 vtermno, const char *buf, int count) 1160static __init int early_put_chars(u32 vtermno, const char *buf, int count)
1008{ 1161{
1009 char scratch[17]; 1162 char scratch[17];
1010 unsigned int len = count; 1163 unsigned int len = count;
1011 1164
1012 /* We use a nul-terminated string, so we have to make a copy. Icky, 1165 /* We use a nul-terminated string, so we make a copy. Icky, huh? */
1013 * huh? */
1014 if (len > sizeof(scratch) - 1) 1166 if (len > sizeof(scratch) - 1)
1015 len = sizeof(scratch) - 1; 1167 len = sizeof(scratch) - 1;
1016 scratch[len] = '\0'; 1168 scratch[len] = '\0';
@@ -1021,8 +1173,10 @@ static __init int early_put_chars(u32 vtermno, const char *buf, int count)
1021 return len; 1173 return len;
1022} 1174}
1023 1175
1024/* Rebooting also tells the Host we're finished, but the RESTART flag tells the 1176/*
1025 * Launcher to reboot us. */ 1177 * Rebooting also tells the Host we're finished, but the RESTART flag tells the
1178 * Launcher to reboot us.
1179 */
1026static void lguest_restart(char *reason) 1180static void lguest_restart(char *reason)
1027{ 1181{
1028 kvm_hypercall2(LHCALL_SHUTDOWN, __pa(reason), LGUEST_SHUTDOWN_RESTART); 1182 kvm_hypercall2(LHCALL_SHUTDOWN, __pa(reason), LGUEST_SHUTDOWN_RESTART);
@@ -1049,7 +1203,8 @@ static void lguest_restart(char *reason)
1049 * fit comfortably. 1203 * fit comfortably.
1050 * 1204 *
1051 * First we need assembly templates of each of the patchable Guest operations, 1205 * First we need assembly templates of each of the patchable Guest operations,
1052 * and these are in i386_head.S. */ 1206 * and these are in i386_head.S.
1207 */
1053 1208
1054/*G:060 We construct a table from the assembler templates: */ 1209/*G:060 We construct a table from the assembler templates: */
1055static const struct lguest_insns 1210static const struct lguest_insns
@@ -1060,9 +1215,11 @@ static const struct lguest_insns
1060 [PARAVIRT_PATCH(pv_irq_ops.save_fl)] = { lgstart_pushf, lgend_pushf }, 1215 [PARAVIRT_PATCH(pv_irq_ops.save_fl)] = { lgstart_pushf, lgend_pushf },
1061}; 1216};
1062 1217
1063/* Now our patch routine is fairly simple (based on the native one in 1218/*
1219 * Now our patch routine is fairly simple (based on the native one in
1064 * paravirt.c). If we have a replacement, we copy it in and return how much of 1220 * paravirt.c). If we have a replacement, we copy it in and return how much of
1065 * the available space we used. */ 1221 * the available space we used.
1222 */
1066static unsigned lguest_patch(u8 type, u16 clobber, void *ibuf, 1223static unsigned lguest_patch(u8 type, u16 clobber, void *ibuf,
1067 unsigned long addr, unsigned len) 1224 unsigned long addr, unsigned len)
1068{ 1225{
@@ -1074,8 +1231,7 @@ static unsigned lguest_patch(u8 type, u16 clobber, void *ibuf,
1074 1231
1075 insn_len = lguest_insns[type].end - lguest_insns[type].start; 1232 insn_len = lguest_insns[type].end - lguest_insns[type].start;
1076 1233
1077 /* Similarly if we can't fit replacement (shouldn't happen, but let's 1234 /* Similarly if it can't fit (doesn't happen, but let's be thorough). */
1078 * be thorough). */
1079 if (len < insn_len) 1235 if (len < insn_len)
1080 return paravirt_patch_default(type, clobber, ibuf, addr, len); 1236 return paravirt_patch_default(type, clobber, ibuf, addr, len);
1081 1237
@@ -1084,22 +1240,28 @@ static unsigned lguest_patch(u8 type, u16 clobber, void *ibuf,
1084 return insn_len; 1240 return insn_len;
1085} 1241}
1086 1242
1087/*G:029 Once we get to lguest_init(), we know we're a Guest. The various 1243/*G:029
1244 * Once we get to lguest_init(), we know we're a Guest. The various
1088 * pv_ops structures in the kernel provide points for (almost) every routine we 1245 * pv_ops structures in the kernel provide points for (almost) every routine we
1089 * have to override to avoid privileged instructions. */ 1246 * have to override to avoid privileged instructions.
1247 */
1090__init void lguest_init(void) 1248__init void lguest_init(void)
1091{ 1249{
1092 /* We're under lguest, paravirt is enabled, and we're running at 1250 /* We're under lguest. */
1093 * privilege level 1, not 0 as normal. */
1094 pv_info.name = "lguest"; 1251 pv_info.name = "lguest";
1252 /* Paravirt is enabled. */
1095 pv_info.paravirt_enabled = 1; 1253 pv_info.paravirt_enabled = 1;
1254 /* We're running at privilege level 1, not 0 as normal. */
1096 pv_info.kernel_rpl = 1; 1255 pv_info.kernel_rpl = 1;
1256 /* Everyone except Xen runs with this set. */
1097 pv_info.shared_kernel_pmd = 1; 1257 pv_info.shared_kernel_pmd = 1;
1098 1258
1099 /* We set up all the lguest overrides for sensitive operations. These 1259 /*
1100 * are detailed with the operations themselves. */ 1260 * We set up all the lguest overrides for sensitive operations. These
1261 * are detailed with the operations themselves.
1262 */
1101 1263
1102 /* interrupt-related operations */ 1264 /* Interrupt-related operations */
1103 pv_irq_ops.init_IRQ = lguest_init_IRQ; 1265 pv_irq_ops.init_IRQ = lguest_init_IRQ;
1104 pv_irq_ops.save_fl = PV_CALLEE_SAVE(save_fl); 1266 pv_irq_ops.save_fl = PV_CALLEE_SAVE(save_fl);
1105 pv_irq_ops.restore_fl = __PV_IS_CALLEE_SAVE(lg_restore_fl); 1267 pv_irq_ops.restore_fl = __PV_IS_CALLEE_SAVE(lg_restore_fl);
@@ -1107,11 +1269,11 @@ __init void lguest_init(void)
1107 pv_irq_ops.irq_enable = __PV_IS_CALLEE_SAVE(lg_irq_enable); 1269 pv_irq_ops.irq_enable = __PV_IS_CALLEE_SAVE(lg_irq_enable);
1108 pv_irq_ops.safe_halt = lguest_safe_halt; 1270 pv_irq_ops.safe_halt = lguest_safe_halt;
1109 1271
1110 /* init-time operations */ 1272 /* Setup operations */
1111 pv_init_ops.memory_setup = lguest_memory_setup; 1273 pv_init_ops.memory_setup = lguest_memory_setup;
1112 pv_init_ops.patch = lguest_patch; 1274 pv_init_ops.patch = lguest_patch;
1113 1275
1114 /* Intercepts of various cpu instructions */ 1276 /* Intercepts of various CPU instructions */
1115 pv_cpu_ops.load_gdt = lguest_load_gdt; 1277 pv_cpu_ops.load_gdt = lguest_load_gdt;
1116 pv_cpu_ops.cpuid = lguest_cpuid; 1278 pv_cpu_ops.cpuid = lguest_cpuid;
1117 pv_cpu_ops.load_idt = lguest_load_idt; 1279 pv_cpu_ops.load_idt = lguest_load_idt;
@@ -1132,7 +1294,7 @@ __init void lguest_init(void)
1132 pv_cpu_ops.start_context_switch = paravirt_start_context_switch; 1294 pv_cpu_ops.start_context_switch = paravirt_start_context_switch;
1133 pv_cpu_ops.end_context_switch = lguest_end_context_switch; 1295 pv_cpu_ops.end_context_switch = lguest_end_context_switch;
1134 1296
1135 /* pagetable management */ 1297 /* Pagetable management */
1136 pv_mmu_ops.write_cr3 = lguest_write_cr3; 1298 pv_mmu_ops.write_cr3 = lguest_write_cr3;
1137 pv_mmu_ops.flush_tlb_user = lguest_flush_tlb_user; 1299 pv_mmu_ops.flush_tlb_user = lguest_flush_tlb_user;
1138 pv_mmu_ops.flush_tlb_single = lguest_flush_tlb_single; 1300 pv_mmu_ops.flush_tlb_single = lguest_flush_tlb_single;
@@ -1154,54 +1316,71 @@ __init void lguest_init(void)
1154 pv_mmu_ops.pte_update_defer = lguest_pte_update; 1316 pv_mmu_ops.pte_update_defer = lguest_pte_update;
1155 1317
1156#ifdef CONFIG_X86_LOCAL_APIC 1318#ifdef CONFIG_X86_LOCAL_APIC
1157 /* apic read/write intercepts */ 1319 /* APIC read/write intercepts */
1158 set_lguest_basic_apic_ops(); 1320 set_lguest_basic_apic_ops();
1159#endif 1321#endif
1160 1322
1161 /* time operations */ 1323 /* Time operations */
1162 pv_time_ops.get_wallclock = lguest_get_wallclock; 1324 pv_time_ops.get_wallclock = lguest_get_wallclock;
1163 pv_time_ops.time_init = lguest_time_init; 1325 pv_time_ops.time_init = lguest_time_init;
1164 pv_time_ops.get_tsc_khz = lguest_tsc_khz; 1326 pv_time_ops.get_tsc_khz = lguest_tsc_khz;
1165 1327
1166 /* Now is a good time to look at the implementations of these functions 1328 /*
1167 * before returning to the rest of lguest_init(). */ 1329 * Now is a good time to look at the implementations of these functions
1330 * before returning to the rest of lguest_init().
1331 */
1168 1332
1169 /*G:070 Now we've seen all the paravirt_ops, we return to 1333 /*G:070
1334 * Now we've seen all the paravirt_ops, we return to
1170 * lguest_init() where the rest of the fairly chaotic boot setup 1335 * lguest_init() where the rest of the fairly chaotic boot setup
1171 * occurs. */ 1336 * occurs.
1337 */
1172 1338
1173 /* The stack protector is a weird thing where gcc places a canary 1339 /*
1340 * The stack protector is a weird thing where gcc places a canary
1174 * value on the stack and then checks it on return. This file is 1341 * value on the stack and then checks it on return. This file is
1175 * compiled with -fno-stack-protector it, so we got this far without 1342 * compiled with -fno-stack-protector it, so we got this far without
1176 * problems. The value of the canary is kept at offset 20 from the 1343 * problems. The value of the canary is kept at offset 20 from the
1177 * %gs register, so we need to set that up before calling C functions 1344 * %gs register, so we need to set that up before calling C functions
1178 * in other files. */ 1345 * in other files.
1346 */
1179 setup_stack_canary_segment(0); 1347 setup_stack_canary_segment(0);
1180 /* We could just call load_stack_canary_segment(), but we might as 1348
1181 * call switch_to_new_gdt() which loads the whole table and sets up 1349 /*
1182 * the per-cpu segment descriptor register %fs as well. */ 1350 * We could just call load_stack_canary_segment(), but we might as well
1351 * call switch_to_new_gdt() which loads the whole table and sets up the
1352 * per-cpu segment descriptor register %fs as well.
1353 */
1183 switch_to_new_gdt(0); 1354 switch_to_new_gdt(0);
1184 1355
1185 /* As described in head_32.S, we map the first 128M of memory. */ 1356 /* We actually boot with all memory mapped, but let's say 128MB. */
1186 max_pfn_mapped = (128*1024*1024) >> PAGE_SHIFT; 1357 max_pfn_mapped = (128*1024*1024) >> PAGE_SHIFT;
1187 1358
1188 /* The Host<->Guest Switcher lives at the top of our address space, and 1359 /*
1360 * The Host<->Guest Switcher lives at the top of our address space, and
1189 * the Host told us how big it is when we made LGUEST_INIT hypercall: 1361 * the Host told us how big it is when we made LGUEST_INIT hypercall:
1190 * it put the answer in lguest_data.reserve_mem */ 1362 * it put the answer in lguest_data.reserve_mem
1363 */
1191 reserve_top_address(lguest_data.reserve_mem); 1364 reserve_top_address(lguest_data.reserve_mem);
1192 1365
1193 /* If we don't initialize the lock dependency checker now, it crashes 1366 /*
1194 * paravirt_disable_iospace. */ 1367 * If we don't initialize the lock dependency checker now, it crashes
1368 * paravirt_disable_iospace.
1369 */
1195 lockdep_init(); 1370 lockdep_init();
1196 1371
1197 /* The IDE code spends about 3 seconds probing for disks: if we reserve 1372 /*
1373 * The IDE code spends about 3 seconds probing for disks: if we reserve
1198 * all the I/O ports up front it can't get them and so doesn't probe. 1374 * all the I/O ports up front it can't get them and so doesn't probe.
1199 * Other device drivers are similar (but less severe). This cuts the 1375 * Other device drivers are similar (but less severe). This cuts the
1200 * kernel boot time on my machine from 4.1 seconds to 0.45 seconds. */ 1376 * kernel boot time on my machine from 4.1 seconds to 0.45 seconds.
1377 */
1201 paravirt_disable_iospace(); 1378 paravirt_disable_iospace();
1202 1379
1203 /* This is messy CPU setup stuff which the native boot code does before 1380 /*
1204 * start_kernel, so we have to do, too: */ 1381 * This is messy CPU setup stuff which the native boot code does before
1382 * start_kernel, so we have to do, too:
1383 */
1205 cpu_detect(&new_cpu_data); 1384 cpu_detect(&new_cpu_data);
1206 /* head.S usually sets up the first capability word, so do it here. */ 1385 /* head.S usually sets up the first capability word, so do it here. */
1207 new_cpu_data.x86_capability[0] = cpuid_edx(1); 1386 new_cpu_data.x86_capability[0] = cpuid_edx(1);
@@ -1218,22 +1397,28 @@ __init void lguest_init(void)
1218 acpi_ht = 0; 1397 acpi_ht = 0;
1219#endif 1398#endif
1220 1399
1221 /* We set the preferred console to "hvc". This is the "hypervisor 1400 /*
1401 * We set the preferred console to "hvc". This is the "hypervisor
1222 * virtual console" driver written by the PowerPC people, which we also 1402 * virtual console" driver written by the PowerPC people, which we also
1223 * adapted for lguest's use. */ 1403 * adapted for lguest's use.
1404 */
1224 add_preferred_console("hvc", 0, NULL); 1405 add_preferred_console("hvc", 0, NULL);
1225 1406
1226 /* Register our very early console. */ 1407 /* Register our very early console. */
1227 virtio_cons_early_init(early_put_chars); 1408 virtio_cons_early_init(early_put_chars);
1228 1409
1229 /* Last of all, we set the power management poweroff hook to point to 1410 /*
1411 * Last of all, we set the power management poweroff hook to point to
1230 * the Guest routine to power off, and the reboot hook to our restart 1412 * the Guest routine to power off, and the reboot hook to our restart
1231 * routine. */ 1413 * routine.
1414 */
1232 pm_power_off = lguest_power_off; 1415 pm_power_off = lguest_power_off;
1233 machine_ops.restart = lguest_restart; 1416 machine_ops.restart = lguest_restart;
1234 1417
1235 /* Now we're set up, call i386_start_kernel() in head32.c and we proceed 1418 /*
1236 * to boot as normal. It never returns. */ 1419 * Now we're set up, call i386_start_kernel() in head32.c and we proceed
1420 * to boot as normal. It never returns.
1421 */
1237 i386_start_kernel(); 1422 i386_start_kernel();
1238} 1423}
1239/* 1424/*
diff --git a/arch/x86/lguest/i386_head.S b/arch/x86/lguest/i386_head.S
index a9c8cfe61cd4..27eac0faee48 100644
--- a/arch/x86/lguest/i386_head.S
+++ b/arch/x86/lguest/i386_head.S
@@ -5,7 +5,8 @@
5#include <asm/thread_info.h> 5#include <asm/thread_info.h>
6#include <asm/processor-flags.h> 6#include <asm/processor-flags.h>
7 7
8/*G:020 Our story starts with the kernel booting into startup_32 in 8/*G:020
9 * Our story starts with the kernel booting into startup_32 in
9 * arch/x86/kernel/head_32.S. It expects a boot header, which is created by 10 * arch/x86/kernel/head_32.S. It expects a boot header, which is created by
10 * the bootloader (the Launcher in our case). 11 * the bootloader (the Launcher in our case).
11 * 12 *
@@ -21,11 +22,14 @@
21 * data without remembering to subtract __PAGE_OFFSET! 22 * data without remembering to subtract __PAGE_OFFSET!
22 * 23 *
23 * The .section line puts this code in .init.text so it will be discarded after 24 * The .section line puts this code in .init.text so it will be discarded after
24 * boot. */ 25 * boot.
26 */
25.section .init.text, "ax", @progbits 27.section .init.text, "ax", @progbits
26ENTRY(lguest_entry) 28ENTRY(lguest_entry)
27 /* We make the "initialization" hypercall now to tell the Host about 29 /*
28 * us, and also find out where it put our page tables. */ 30 * We make the "initialization" hypercall now to tell the Host about
31 * us, and also find out where it put our page tables.
32 */
29 movl $LHCALL_LGUEST_INIT, %eax 33 movl $LHCALL_LGUEST_INIT, %eax
30 movl $lguest_data - __PAGE_OFFSET, %ebx 34 movl $lguest_data - __PAGE_OFFSET, %ebx
31 .byte 0x0f,0x01,0xc1 /* KVM_HYPERCALL */ 35 .byte 0x0f,0x01,0xc1 /* KVM_HYPERCALL */
@@ -33,13 +37,14 @@ ENTRY(lguest_entry)
33 /* Set up the initial stack so we can run C code. */ 37 /* Set up the initial stack so we can run C code. */
34 movl $(init_thread_union+THREAD_SIZE),%esp 38 movl $(init_thread_union+THREAD_SIZE),%esp
35 39
36 /* Jumps are relative, and we're running __PAGE_OFFSET too low at the 40 /* Jumps are relative: we're running __PAGE_OFFSET too low. */
37 * moment. */
38 jmp lguest_init+__PAGE_OFFSET 41 jmp lguest_init+__PAGE_OFFSET
39 42
40/*G:055 We create a macro which puts the assembler code between lgstart_ and 43/*G:055
41 * lgend_ markers. These templates are put in the .text section: they can't be 44 * We create a macro which puts the assembler code between lgstart_ and lgend_
42 * discarded after boot as we may need to patch modules, too. */ 45 * markers. These templates are put in the .text section: they can't be
46 * discarded after boot as we may need to patch modules, too.
47 */
43.text 48.text
44#define LGUEST_PATCH(name, insns...) \ 49#define LGUEST_PATCH(name, insns...) \
45 lgstart_##name: insns; lgend_##name:; \ 50 lgstart_##name: insns; lgend_##name:; \
@@ -48,83 +53,103 @@ ENTRY(lguest_entry)
48LGUEST_PATCH(cli, movl $0, lguest_data+LGUEST_DATA_irq_enabled) 53LGUEST_PATCH(cli, movl $0, lguest_data+LGUEST_DATA_irq_enabled)
49LGUEST_PATCH(pushf, movl lguest_data+LGUEST_DATA_irq_enabled, %eax) 54LGUEST_PATCH(pushf, movl lguest_data+LGUEST_DATA_irq_enabled, %eax)
50 55
51/*G:033 But using those wrappers is inefficient (we'll see why that doesn't 56/*G:033
52 * matter for save_fl and irq_disable later). If we write our routines 57 * But using those wrappers is inefficient (we'll see why that doesn't matter
53 * carefully in assembler, we can avoid clobbering any registers and avoid 58 * for save_fl and irq_disable later). If we write our routines carefully in
54 * jumping through the wrapper functions. 59 * assembler, we can avoid clobbering any registers and avoid jumping through
60 * the wrapper functions.
55 * 61 *
56 * I skipped over our first piece of assembler, but this one is worth studying 62 * I skipped over our first piece of assembler, but this one is worth studying
57 * in a bit more detail so I'll describe in easy stages. First, the routine 63 * in a bit more detail so I'll describe in easy stages. First, the routine to
58 * to enable interrupts: */ 64 * enable interrupts:
65 */
59ENTRY(lg_irq_enable) 66ENTRY(lg_irq_enable)
60 /* The reverse of irq_disable, this sets lguest_data.irq_enabled to 67 /*
61 * X86_EFLAGS_IF (ie. "Interrupts enabled"). */ 68 * The reverse of irq_disable, this sets lguest_data.irq_enabled to
69 * X86_EFLAGS_IF (ie. "Interrupts enabled").
70 */
62 movl $X86_EFLAGS_IF, lguest_data+LGUEST_DATA_irq_enabled 71 movl $X86_EFLAGS_IF, lguest_data+LGUEST_DATA_irq_enabled
63 /* But now we need to check if the Host wants to know: there might have 72 /*
73 * But now we need to check if the Host wants to know: there might have
64 * been interrupts waiting to be delivered, in which case it will have 74 * been interrupts waiting to be delivered, in which case it will have
65 * set lguest_data.irq_pending to X86_EFLAGS_IF. If it's not zero, we 75 * set lguest_data.irq_pending to X86_EFLAGS_IF. If it's not zero, we
66 * jump to send_interrupts, otherwise we're done. */ 76 * jump to send_interrupts, otherwise we're done.
77 */
67 testl $0, lguest_data+LGUEST_DATA_irq_pending 78 testl $0, lguest_data+LGUEST_DATA_irq_pending
68 jnz send_interrupts 79 jnz send_interrupts
69 /* One cool thing about x86 is that you can do many things without using 80 /*
81 * One cool thing about x86 is that you can do many things without using
70 * a register. In this case, the normal path hasn't needed to save or 82 * a register. In this case, the normal path hasn't needed to save or
71 * restore any registers at all! */ 83 * restore any registers at all!
84 */
72 ret 85 ret
73send_interrupts: 86send_interrupts:
74 /* OK, now we need a register: eax is used for the hypercall number, 87 /*
88 * OK, now we need a register: eax is used for the hypercall number,
75 * which is LHCALL_SEND_INTERRUPTS. 89 * which is LHCALL_SEND_INTERRUPTS.
76 * 90 *
77 * We used not to bother with this pending detection at all, which was 91 * We used not to bother with this pending detection at all, which was
78 * much simpler. Sooner or later the Host would realize it had to 92 * much simpler. Sooner or later the Host would realize it had to
79 * send us an interrupt. But that turns out to make performance 7 93 * send us an interrupt. But that turns out to make performance 7
80 * times worse on a simple tcp benchmark. So now we do this the hard 94 * times worse on a simple tcp benchmark. So now we do this the hard
81 * way. */ 95 * way.
96 */
82 pushl %eax 97 pushl %eax
83 movl $LHCALL_SEND_INTERRUPTS, %eax 98 movl $LHCALL_SEND_INTERRUPTS, %eax
84 /* This is a vmcall instruction (same thing that KVM uses). Older 99 /*
100 * This is a vmcall instruction (same thing that KVM uses). Older
85 * assembler versions might not know the "vmcall" instruction, so we 101 * assembler versions might not know the "vmcall" instruction, so we
86 * create one manually here. */ 102 * create one manually here.
103 */
87 .byte 0x0f,0x01,0xc1 /* KVM_HYPERCALL */ 104 .byte 0x0f,0x01,0xc1 /* KVM_HYPERCALL */
105 /* Put eax back the way we found it. */
88 popl %eax 106 popl %eax
89 ret 107 ret
90 108
91/* Finally, the "popf" or "restore flags" routine. The %eax register holds the 109/*
110 * Finally, the "popf" or "restore flags" routine. The %eax register holds the
92 * flags (in practice, either X86_EFLAGS_IF or 0): if it's X86_EFLAGS_IF we're 111 * flags (in practice, either X86_EFLAGS_IF or 0): if it's X86_EFLAGS_IF we're
93 * enabling interrupts again, if it's 0 we're leaving them off. */ 112 * enabling interrupts again, if it's 0 we're leaving them off.
113 */
94ENTRY(lg_restore_fl) 114ENTRY(lg_restore_fl)
95 /* This is just "lguest_data.irq_enabled = flags;" */ 115 /* This is just "lguest_data.irq_enabled = flags;" */
96 movl %eax, lguest_data+LGUEST_DATA_irq_enabled 116 movl %eax, lguest_data+LGUEST_DATA_irq_enabled
97 /* Now, if the %eax value has enabled interrupts and 117 /*
118 * Now, if the %eax value has enabled interrupts and
98 * lguest_data.irq_pending is set, we want to tell the Host so it can 119 * lguest_data.irq_pending is set, we want to tell the Host so it can
99 * deliver any outstanding interrupts. Fortunately, both values will 120 * deliver any outstanding interrupts. Fortunately, both values will
100 * be X86_EFLAGS_IF (ie. 512) in that case, and the "testl" 121 * be X86_EFLAGS_IF (ie. 512) in that case, and the "testl"
101 * instruction will AND them together for us. If both are set, we 122 * instruction will AND them together for us. If both are set, we
102 * jump to send_interrupts. */ 123 * jump to send_interrupts.
124 */
103 testl lguest_data+LGUEST_DATA_irq_pending, %eax 125 testl lguest_data+LGUEST_DATA_irq_pending, %eax
104 jnz send_interrupts 126 jnz send_interrupts
105 /* Again, the normal path has used no extra registers. Clever, huh? */ 127 /* Again, the normal path has used no extra registers. Clever, huh? */
106 ret 128 ret
129/*:*/
107 130
108/* These demark the EIP range where host should never deliver interrupts. */ 131/* These demark the EIP range where host should never deliver interrupts. */
109.global lguest_noirq_start 132.global lguest_noirq_start
110.global lguest_noirq_end 133.global lguest_noirq_end
111 134
112/*M:004 When the Host reflects a trap or injects an interrupt into the Guest, 135/*M:004
113 * it sets the eflags interrupt bit on the stack based on 136 * When the Host reflects a trap or injects an interrupt into the Guest, it
114 * lguest_data.irq_enabled, so the Guest iret logic does the right thing when 137 * sets the eflags interrupt bit on the stack based on lguest_data.irq_enabled,
115 * restoring it. However, when the Host sets the Guest up for direct traps, 138 * so the Guest iret logic does the right thing when restoring it. However,
116 * such as system calls, the processor is the one to push eflags onto the 139 * when the Host sets the Guest up for direct traps, such as system calls, the
117 * stack, and the interrupt bit will be 1 (in reality, interrupts are always 140 * processor is the one to push eflags onto the stack, and the interrupt bit
118 * enabled in the Guest). 141 * will be 1 (in reality, interrupts are always enabled in the Guest).
119 * 142 *
120 * This turns out to be harmless: the only trap which should happen under Linux 143 * This turns out to be harmless: the only trap which should happen under Linux
121 * with interrupts disabled is Page Fault (due to our lazy mapping of vmalloc 144 * with interrupts disabled is Page Fault (due to our lazy mapping of vmalloc
122 * regions), which has to be reflected through the Host anyway. If another 145 * regions), which has to be reflected through the Host anyway. If another
123 * trap *does* go off when interrupts are disabled, the Guest will panic, and 146 * trap *does* go off when interrupts are disabled, the Guest will panic, and
124 * we'll never get to this iret! :*/ 147 * we'll never get to this iret!
148:*/
125 149
126/*G:045 There is one final paravirt_op that the Guest implements, and glancing 150/*G:045
127 * at it you can see why I left it to last. It's *cool*! It's in *assembler*! 151 * There is one final paravirt_op that the Guest implements, and glancing at it
152 * you can see why I left it to last. It's *cool*! It's in *assembler*!
128 * 153 *
129 * The "iret" instruction is used to return from an interrupt or trap. The 154 * The "iret" instruction is used to return from an interrupt or trap. The
130 * stack looks like this: 155 * stack looks like this:
@@ -148,15 +173,18 @@ ENTRY(lg_restore_fl)
148 * return to userspace or wherever. Our solution to this is to surround the 173 * return to userspace or wherever. Our solution to this is to surround the
149 * code with lguest_noirq_start: and lguest_noirq_end: labels. We tell the 174 * code with lguest_noirq_start: and lguest_noirq_end: labels. We tell the
150 * Host that it is *never* to interrupt us there, even if interrupts seem to be 175 * Host that it is *never* to interrupt us there, even if interrupts seem to be
151 * enabled. */ 176 * enabled.
177 */
152ENTRY(lguest_iret) 178ENTRY(lguest_iret)
153 pushl %eax 179 pushl %eax
154 movl 12(%esp), %eax 180 movl 12(%esp), %eax
155lguest_noirq_start: 181lguest_noirq_start:
156 /* Note the %ss: segment prefix here. Normal data accesses use the 182 /*
183 * Note the %ss: segment prefix here. Normal data accesses use the
157 * "ds" segment, but that will have already been restored for whatever 184 * "ds" segment, but that will have already been restored for whatever
158 * we're returning to (such as userspace): we can't trust it. The %ss: 185 * we're returning to (such as userspace): we can't trust it. The %ss:
159 * prefix makes sure we use the stack segment, which is still valid. */ 186 * prefix makes sure we use the stack segment, which is still valid.
187 */
160 movl %eax,%ss:lguest_data+LGUEST_DATA_irq_enabled 188 movl %eax,%ss:lguest_data+LGUEST_DATA_irq_enabled
161 popl %eax 189 popl %eax
162 iret 190 iret
diff --git a/arch/x86/lib/msr.c b/arch/x86/lib/msr.c
index 1440b9c0547e..caa24aca8115 100644
--- a/arch/x86/lib/msr.c
+++ b/arch/x86/lib/msr.c
@@ -89,16 +89,13 @@ void rdmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs)
89 rv.msrs = msrs; 89 rv.msrs = msrs;
90 rv.msr_no = msr_no; 90 rv.msr_no = msr_no;
91 91
92 preempt_disable(); 92 this_cpu = get_cpu();
93 /* 93
94 * FIXME: handle the CPU we're executing on separately for now until 94 if (cpumask_test_cpu(this_cpu, mask))
95 * smp_call_function_many has been fixed to not skip it. 95 __rdmsr_on_cpu(&rv);
96 */
97 this_cpu = raw_smp_processor_id();
98 smp_call_function_single(this_cpu, __rdmsr_on_cpu, &rv, 1);
99 96
100 smp_call_function_many(mask, __rdmsr_on_cpu, &rv, 1); 97 smp_call_function_many(mask, __rdmsr_on_cpu, &rv, 1);
101 preempt_enable(); 98 put_cpu();
102} 99}
103EXPORT_SYMBOL(rdmsr_on_cpus); 100EXPORT_SYMBOL(rdmsr_on_cpus);
104 101
@@ -121,16 +118,13 @@ void wrmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs)
121 rv.msrs = msrs; 118 rv.msrs = msrs;
122 rv.msr_no = msr_no; 119 rv.msr_no = msr_no;
123 120
124 preempt_disable(); 121 this_cpu = get_cpu();
125 /* 122
126 * FIXME: handle the CPU we're executing on separately for now until 123 if (cpumask_test_cpu(this_cpu, mask))
127 * smp_call_function_many has been fixed to not skip it. 124 __wrmsr_on_cpu(&rv);
128 */
129 this_cpu = raw_smp_processor_id();
130 smp_call_function_single(this_cpu, __wrmsr_on_cpu, &rv, 1);
131 125
132 smp_call_function_many(mask, __wrmsr_on_cpu, &rv, 1); 126 smp_call_function_many(mask, __wrmsr_on_cpu, &rv, 1);
133 preempt_enable(); 127 put_cpu();
134} 128}
135EXPORT_SYMBOL(wrmsr_on_cpus); 129EXPORT_SYMBOL(wrmsr_on_cpus);
136 130
diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
index 58f621e81919..2112ed55e7ea 100644
--- a/arch/x86/mm/highmem_32.c
+++ b/arch/x86/mm/highmem_32.c
@@ -103,6 +103,7 @@ EXPORT_SYMBOL(kmap);
103EXPORT_SYMBOL(kunmap); 103EXPORT_SYMBOL(kunmap);
104EXPORT_SYMBOL(kmap_atomic); 104EXPORT_SYMBOL(kmap_atomic);
105EXPORT_SYMBOL(kunmap_atomic); 105EXPORT_SYMBOL(kunmap_atomic);
106EXPORT_SYMBOL(kmap_atomic_prot);
106 107
107void __init set_highmem_pages_init(void) 108void __init set_highmem_pages_init(void)
108{ 109{
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 6176fe8f29e0..ea56b8cbb6a6 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -796,7 +796,7 @@ int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
796 return ret; 796 return ret;
797 797
798#else 798#else
799 reserve_bootmem(phys, len, BOOTMEM_DEFAULT); 799 reserve_bootmem(phys, len, flags);
800#endif 800#endif
801 801
802 if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) { 802 if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 1b734d7a8966..7e600c1962db 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -591,9 +591,12 @@ static int __change_page_attr(struct cpa_data *cpa, int primary)
591 unsigned int level; 591 unsigned int level;
592 pte_t *kpte, old_pte; 592 pte_t *kpte, old_pte;
593 593
594 if (cpa->flags & CPA_PAGES_ARRAY) 594 if (cpa->flags & CPA_PAGES_ARRAY) {
595 address = (unsigned long)page_address(cpa->pages[cpa->curpage]); 595 struct page *page = cpa->pages[cpa->curpage];
596 else if (cpa->flags & CPA_ARRAY) 596 if (unlikely(PageHighMem(page)))
597 return 0;
598 address = (unsigned long)page_address(page);
599 } else if (cpa->flags & CPA_ARRAY)
597 address = cpa->vaddr[cpa->curpage]; 600 address = cpa->vaddr[cpa->curpage];
598 else 601 else
599 address = *cpa->vaddr; 602 address = *cpa->vaddr;
@@ -697,9 +700,12 @@ static int cpa_process_alias(struct cpa_data *cpa)
697 * No need to redo, when the primary call touched the direct 700 * No need to redo, when the primary call touched the direct
698 * mapping already: 701 * mapping already:
699 */ 702 */
700 if (cpa->flags & CPA_PAGES_ARRAY) 703 if (cpa->flags & CPA_PAGES_ARRAY) {
701 vaddr = (unsigned long)page_address(cpa->pages[cpa->curpage]); 704 struct page *page = cpa->pages[cpa->curpage];
702 else if (cpa->flags & CPA_ARRAY) 705 if (unlikely(PageHighMem(page)))
706 return 0;
707 vaddr = (unsigned long)page_address(page);
708 } else if (cpa->flags & CPA_ARRAY)
703 vaddr = cpa->vaddr[cpa->curpage]; 709 vaddr = cpa->vaddr[cpa->curpage];
704 else 710 else
705 vaddr = *cpa->vaddr; 711 vaddr = *cpa->vaddr;
@@ -997,12 +1003,15 @@ EXPORT_SYMBOL(set_memory_array_uc);
997int _set_memory_wc(unsigned long addr, int numpages) 1003int _set_memory_wc(unsigned long addr, int numpages)
998{ 1004{
999 int ret; 1005 int ret;
1006 unsigned long addr_copy = addr;
1007
1000 ret = change_page_attr_set(&addr, numpages, 1008 ret = change_page_attr_set(&addr, numpages,
1001 __pgprot(_PAGE_CACHE_UC_MINUS), 0); 1009 __pgprot(_PAGE_CACHE_UC_MINUS), 0);
1002
1003 if (!ret) { 1010 if (!ret) {
1004 ret = change_page_attr_set(&addr, numpages, 1011 ret = change_page_attr_set_clr(&addr_copy, numpages,
1005 __pgprot(_PAGE_CACHE_WC), 0); 1012 __pgprot(_PAGE_CACHE_WC),
1013 __pgprot(_PAGE_CACHE_MASK),
1014 0, 0, NULL);
1006 } 1015 }
1007 return ret; 1016 return ret;
1008} 1017}
@@ -1119,7 +1128,9 @@ int set_pages_array_uc(struct page **pages, int addrinarray)
1119 int free_idx; 1128 int free_idx;
1120 1129
1121 for (i = 0; i < addrinarray; i++) { 1130 for (i = 0; i < addrinarray; i++) {
1122 start = (unsigned long)page_address(pages[i]); 1131 if (PageHighMem(pages[i]))
1132 continue;
1133 start = page_to_pfn(pages[i]) << PAGE_SHIFT;
1123 end = start + PAGE_SIZE; 1134 end = start + PAGE_SIZE;
1124 if (reserve_memtype(start, end, _PAGE_CACHE_UC_MINUS, NULL)) 1135 if (reserve_memtype(start, end, _PAGE_CACHE_UC_MINUS, NULL))
1125 goto err_out; 1136 goto err_out;
@@ -1132,7 +1143,9 @@ int set_pages_array_uc(struct page **pages, int addrinarray)
1132err_out: 1143err_out:
1133 free_idx = i; 1144 free_idx = i;
1134 for (i = 0; i < free_idx; i++) { 1145 for (i = 0; i < free_idx; i++) {
1135 start = (unsigned long)page_address(pages[i]); 1146 if (PageHighMem(pages[i]))
1147 continue;
1148 start = page_to_pfn(pages[i]) << PAGE_SHIFT;
1136 end = start + PAGE_SIZE; 1149 end = start + PAGE_SIZE;
1137 free_memtype(start, end); 1150 free_memtype(start, end);
1138 } 1151 }
@@ -1161,7 +1174,9 @@ int set_pages_array_wb(struct page **pages, int addrinarray)
1161 return retval; 1174 return retval;
1162 1175
1163 for (i = 0; i < addrinarray; i++) { 1176 for (i = 0; i < addrinarray; i++) {
1164 start = (unsigned long)page_address(pages[i]); 1177 if (PageHighMem(pages[i]))
1178 continue;
1179 start = page_to_pfn(pages[i]) << PAGE_SHIFT;
1165 end = start + PAGE_SIZE; 1180 end = start + PAGE_SIZE;
1166 free_memtype(start, end); 1181 free_memtype(start, end);
1167 } 1182 }
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index e6718bb28065..352aa9e927e2 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -623,7 +623,8 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot,
623 return ret; 623 return ret;
624 624
625 if (flags != want_flags) { 625 if (flags != want_flags) {
626 if (strict_prot || !is_new_memtype_allowed(want_flags, flags)) { 626 if (strict_prot ||
627 !is_new_memtype_allowed(paddr, size, want_flags, flags)) {
627 free_memtype(paddr, paddr + size); 628 free_memtype(paddr, paddr + size);
628 printk(KERN_ERR "%s:%d map pfn expected mapping type %s" 629 printk(KERN_ERR "%s:%d map pfn expected mapping type %s"
629 " for %Lx-%Lx, got %s\n", 630 " for %Lx-%Lx, got %s\n",
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 8e43bdd45456..ed34f5e35999 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -25,7 +25,7 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
25 return pte; 25 return pte;
26} 26}
27 27
28void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte) 28void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
29{ 29{
30 pgtable_page_dtor(pte); 30 pgtable_page_dtor(pte);
31 paravirt_release_pte(page_to_pfn(pte)); 31 paravirt_release_pte(page_to_pfn(pte));
@@ -33,14 +33,14 @@ void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
33} 33}
34 34
35#if PAGETABLE_LEVELS > 2 35#if PAGETABLE_LEVELS > 2
36void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) 36void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
37{ 37{
38 paravirt_release_pmd(__pa(pmd) >> PAGE_SHIFT); 38 paravirt_release_pmd(__pa(pmd) >> PAGE_SHIFT);
39 tlb_remove_page(tlb, virt_to_page(pmd)); 39 tlb_remove_page(tlb, virt_to_page(pmd));
40} 40}
41 41
42#if PAGETABLE_LEVELS > 3 42#if PAGETABLE_LEVELS > 3
43void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud) 43void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
44{ 44{
45 paravirt_release_pud(__pa(pud) >> PAGE_SHIFT); 45 paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
46 tlb_remove_page(tlb, virt_to_page(pud)); 46 tlb_remove_page(tlb, virt_to_page(pud));
@@ -329,7 +329,6 @@ void __init reserve_top_address(unsigned long reserve)
329 printk(KERN_INFO "Reserving virtual address space above 0x%08x\n", 329 printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
330 (int)-reserve); 330 (int)-reserve);
331 __FIXADDR_TOP = -reserve - PAGE_SIZE; 331 __FIXADDR_TOP = -reserve - PAGE_SIZE;
332 __VMALLOC_RESERVE += reserve;
333#endif 332#endif
334} 333}
335 334
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 2dfcbf9df2ae..dbb5381f7b3b 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -79,8 +79,10 @@ static __init void bad_srat(void)
79 acpi_numa = -1; 79 acpi_numa = -1;
80 for (i = 0; i < MAX_LOCAL_APIC; i++) 80 for (i = 0; i < MAX_LOCAL_APIC; i++)
81 apicid_to_node[i] = NUMA_NO_NODE; 81 apicid_to_node[i] = NUMA_NO_NODE;
82 for (i = 0; i < MAX_NUMNODES; i++) 82 for (i = 0; i < MAX_NUMNODES; i++) {
83 nodes_add[i].start = nodes[i].end = 0; 83 nodes[i].start = nodes[i].end = 0;
84 nodes_add[i].start = nodes_add[i].end = 0;
85 }
84 remove_all_active_ranges(); 86 remove_all_active_ranges();
85} 87}
86 88
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 821e97017e95..c814e144a3f0 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -183,18 +183,17 @@ static void flush_tlb_others_ipi(const struct cpumask *cpumask,
183 183
184 f->flush_mm = mm; 184 f->flush_mm = mm;
185 f->flush_va = va; 185 f->flush_va = va;
186 cpumask_andnot(to_cpumask(f->flush_cpumask), 186 if (cpumask_andnot(to_cpumask(f->flush_cpumask), cpumask, cpumask_of(smp_processor_id()))) {
187 cpumask, cpumask_of(smp_processor_id())); 187 /*
188 188 * We have to send the IPI only to
189 /* 189 * CPUs affected.
190 * We have to send the IPI only to 190 */
191 * CPUs affected. 191 apic->send_IPI_mask(to_cpumask(f->flush_cpumask),
192 */ 192 INVALIDATE_TLB_VECTOR_START + sender);
193 apic->send_IPI_mask(to_cpumask(f->flush_cpumask),
194 INVALIDATE_TLB_VECTOR_START + sender);
195 193
196 while (!cpumask_empty(to_cpumask(f->flush_cpumask))) 194 while (!cpumask_empty(to_cpumask(f->flush_cpumask)))
197 cpu_relax(); 195 cpu_relax();
196 }
198 197
199 f->flush_mm = NULL; 198 f->flush_mm = NULL;
200 f->flush_va = 0; 199 f->flush_va = 0;
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 172438f86a02..7410640db173 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -5,6 +5,10 @@ CFLAGS_REMOVE_time.o = -pg
5CFLAGS_REMOVE_irq.o = -pg 5CFLAGS_REMOVE_irq.o = -pg
6endif 6endif
7 7
8# Make sure early boot has no stackprotector
9nostackp := $(call cc-option, -fno-stack-protector)
10CFLAGS_enlighten.o := $(nostackp)
11
8obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \ 12obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
9 time.o xen-asm.o xen-asm_$(BITS).o \ 13 time.o xen-asm.o xen-asm_$(BITS).o \
10 grant-table.o suspend.o 14 grant-table.o suspend.o
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 0a1700a2be9c..e90540a46a0b 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -974,10 +974,6 @@ asmlinkage void __init xen_start_kernel(void)
974 974
975 xen_domain_type = XEN_PV_DOMAIN; 975 xen_domain_type = XEN_PV_DOMAIN;
976 976
977 BUG_ON(memcmp(xen_start_info->magic, "xen-3", 5) != 0);
978
979 xen_setup_features();
980
981 /* Install Xen paravirt ops */ 977 /* Install Xen paravirt ops */
982 pv_info = xen_info; 978 pv_info = xen_info;
983 pv_init_ops = xen_init_ops; 979 pv_init_ops = xen_init_ops;
@@ -986,8 +982,15 @@ asmlinkage void __init xen_start_kernel(void)
986 pv_apic_ops = xen_apic_ops; 982 pv_apic_ops = xen_apic_ops;
987 pv_mmu_ops = xen_mmu_ops; 983 pv_mmu_ops = xen_mmu_ops;
988 984
989 xen_init_irq_ops(); 985#ifdef CONFIG_X86_64
986 /*
987 * Setup percpu state. We only need to do this for 64-bit
988 * because 32-bit already has %fs set properly.
989 */
990 load_percpu_segment(0);
991#endif
990 992
993 xen_init_irq_ops();
991 xen_init_cpuid_mask(); 994 xen_init_cpuid_mask();
992 995
993#ifdef CONFIG_X86_LOCAL_APIC 996#ifdef CONFIG_X86_LOCAL_APIC
@@ -997,6 +1000,8 @@ asmlinkage void __init xen_start_kernel(void)
997 set_xen_basic_apic_ops(); 1000 set_xen_basic_apic_ops();
998#endif 1001#endif
999 1002
1003 xen_setup_features();
1004
1000 if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) { 1005 if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
1001 pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start; 1006 pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;
1002 pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit; 1007 pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;
@@ -1004,13 +1009,6 @@ asmlinkage void __init xen_start_kernel(void)
1004 1009
1005 machine_ops = xen_machine_ops; 1010 machine_ops = xen_machine_ops;
1006 1011
1007#ifdef CONFIG_X86_64
1008 /*
1009 * Setup percpu state. We only need to do this for 64-bit
1010 * because 32-bit already has %fs set properly.
1011 */
1012 load_percpu_segment(0);
1013#endif
1014 /* 1012 /*
1015 * The only reliable way to retain the initial address of the 1013 * The only reliable way to retain the initial address of the
1016 * percpu gdt_page is to remember it here, so we can go and 1014 * percpu gdt_page is to remember it here, so we can go and
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-16 21:15:12 -0500