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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 10:57:32 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 10:57:32 -0400
commitc7208de304ac335d5d58db346bb773a471fc636b (patch)
tree47808484fc3ff8447fe30943a33880bae00d5fee /arch/x86
parent15b0404272e1513940223cf9eefadfd22804a060 (diff)
parent5367b6887e7d8c870a5da7d9b8c6e9c207684e43 (diff)
Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (22 commits) x86: Fix code patching for paravirt-alternatives on 486 x86, msr: change msr-reg.o to obj-y, and export its symbols x86: Use hard_smp_processor_id() to get apic id for AMD K8 cpus x86, sched: Workaround broken sched domain creation for AMD Magny-Cours x86, mcheck: Use correct cpumask for shared bank4 x86, cacheinfo: Fixup L3 cache information for AMD multi-node processors x86: Fix CPU llc_shared_map information for AMD Magny-Cours x86, msr: Fix msr-reg.S compilation with gas 2.16.1, on 32-bit too x86: Move kernel_fpu_using to irq_fpu_usable in asm/i387.h x86, msr: fix msr-reg.S compilation with gas 2.16.1 x86, msr: Export the register-setting MSR functions via /dev/*/msr x86, msr: Create _on_cpu helpers for {rw,wr}msr_safe_regs() x86, msr: Have the _safe MSR functions return -EIO, not -EFAULT x86, msr: CFI annotations, cleanups for msr-reg.S x86, asm: Make _ASM_EXTABLE() usable from assembly code x86, asm: Add 32-bit versions of the combined CFI macros x86, AMD: Disable wrongly set X86_FEATURE_LAHF_LM CPUID bit x86, msr: Rewrite AMD rd/wrmsr variants x86, msr: Add rd/wrmsr interfaces with preset registers x86: add specific support for Intel Atom architecture ...
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Kconfig.cpu19
-rw-r--r--arch/x86/Makefile2
-rw-r--r--arch/x86/Makefile_32.cpu2
-rw-r--r--arch/x86/crypto/aesni-intel_glue.c17
-rw-r--r--arch/x86/include/asm/asm.h10
-rw-r--r--arch/x86/include/asm/cpufeature.h1
-rw-r--r--arch/x86/include/asm/dwarf2.h18
-rw-r--r--arch/x86/include/asm/i387.h8
-rw-r--r--arch/x86/include/asm/module.h2
-rw-r--r--arch/x86/include/asm/msr.h75
-rw-r--r--arch/x86/include/asm/paravirt.h746
-rw-r--r--arch/x86/include/asm/paravirt_types.h721
-rw-r--r--arch/x86/include/asm/processor.h16
-rw-r--r--arch/x86/kernel/alternative.c2
-rw-r--r--arch/x86/kernel/cpu/amd.c80
-rw-r--r--arch/x86/kernel/cpu/intel_cacheinfo.c32
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_amd.c8
-rw-r--r--arch/x86/kernel/cpu/proc.c2
-rw-r--r--arch/x86/kernel/msr.c61
-rw-r--r--arch/x86/kernel/paravirt.c3
-rw-r--r--arch/x86/kernel/smpboot.c3
-rw-r--r--arch/x86/lib/Makefile2
-rw-r--r--arch/x86/lib/msr-reg-export.c5
-rw-r--r--arch/x86/lib/msr-reg.S102
-rw-r--r--arch/x86/lib/msr.c49
-rw-r--r--arch/x86/xen/enlighten.c2
26 files changed, 1202 insertions, 786 deletions
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 8130334329c0..527519b8a9f9 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -262,6 +262,15 @@ config MCORE2
262 family in /proc/cpuinfo. Newer ones have 6 and older ones 15 262 family in /proc/cpuinfo. Newer ones have 6 and older ones 15
263 (not a typo) 263 (not a typo)
264 264
265config MATOM
266 bool "Intel Atom"
267 ---help---
268
269 Select this for the Intel Atom platform. Intel Atom CPUs have an
270 in-order pipelining architecture and thus can benefit from
271 accordingly optimized code. Use a recent GCC with specific Atom
272 support in order to fully benefit from selecting this option.
273
265config GENERIC_CPU 274config GENERIC_CPU
266 bool "Generic-x86-64" 275 bool "Generic-x86-64"
267 depends on X86_64 276 depends on X86_64
@@ -295,7 +304,7 @@ config X86_CPU
295config X86_L1_CACHE_BYTES 304config X86_L1_CACHE_BYTES
296 int 305 int
297 default "128" if MPSC 306 default "128" if MPSC
298 default "64" if GENERIC_CPU || MK8 || MCORE2 || X86_32 307 default "64" if GENERIC_CPU || MK8 || MCORE2 || MATOM || X86_32
299 308
300config X86_INTERNODE_CACHE_BYTES 309config X86_INTERNODE_CACHE_BYTES
301 int 310 int
@@ -310,7 +319,7 @@ config X86_L1_CACHE_SHIFT
310 default "7" if MPENTIUM4 || MPSC 319 default "7" if MPENTIUM4 || MPSC
311 default "4" if X86_ELAN || M486 || M386 || MGEODEGX1 320 default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
312 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX 321 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
313 default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7 || X86_GENERIC || GENERIC_CPU 322 default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
314 323
315config X86_XADD 324config X86_XADD
316 def_bool y 325 def_bool y
@@ -359,7 +368,7 @@ config X86_INTEL_USERCOPY
359 368
360config X86_USE_PPRO_CHECKSUM 369config X86_USE_PPRO_CHECKSUM
361 def_bool y 370 def_bool y
362 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2 371 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
363 372
364config X86_USE_3DNOW 373config X86_USE_3DNOW
365 def_bool y 374 def_bool y
@@ -387,7 +396,7 @@ config X86_P6_NOP
387 396
388config X86_TSC 397config X86_TSC
389 def_bool y 398 def_bool y
390 depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64 399 depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MATOM) && !X86_NUMAQ) || X86_64
391 400
392config X86_CMPXCHG64 401config X86_CMPXCHG64
393 def_bool y 402 def_bool y
@@ -397,7 +406,7 @@ config X86_CMPXCHG64
397# generates cmov. 406# generates cmov.
398config X86_CMOV 407config X86_CMOV
399 def_bool y 408 def_bool y
400 depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64) 409 depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM)
401 410
402config X86_MINIMUM_CPU_FAMILY 411config X86_MINIMUM_CPU_FAMILY
403 int 412 int
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 5e7db44d709e..5128b178529f 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -55,6 +55,8 @@ else
55 55
56 cflags-$(CONFIG_MCORE2) += \ 56 cflags-$(CONFIG_MCORE2) += \
57 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) 57 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
58 cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
59 $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
58 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) 60 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
59 KBUILD_CFLAGS += $(cflags-y) 61 KBUILD_CFLAGS += $(cflags-y)
60 62
diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu
index 80177ec052f0..30e9a264f69d 100644
--- a/arch/x86/Makefile_32.cpu
+++ b/arch/x86/Makefile_32.cpu
@@ -33,6 +33,8 @@ cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-f
33cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) 33cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686)
34cflags-$(CONFIG_MVIAC7) += -march=i686 34cflags-$(CONFIG_MVIAC7) += -march=i686
35cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) 35cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2)
36cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \
37 $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
36 38
37# AMD Elan support 39# AMD Elan support
38cflags-$(CONFIG_X86_ELAN) += -march=i486 40cflags-$(CONFIG_X86_ELAN) += -march=i486
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index d3ec8d588d4b..585edebe12cf 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -59,13 +59,6 @@ asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
59asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out, 59asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
60 const u8 *in, unsigned int len, u8 *iv); 60 const u8 *in, unsigned int len, u8 *iv);
61 61
62static inline int kernel_fpu_using(void)
63{
64 if (in_interrupt() && !(read_cr0() & X86_CR0_TS))
65 return 1;
66 return 0;
67}
68
69static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx) 62static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
70{ 63{
71 unsigned long addr = (unsigned long)raw_ctx; 64 unsigned long addr = (unsigned long)raw_ctx;
@@ -89,7 +82,7 @@ static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
89 return -EINVAL; 82 return -EINVAL;
90 } 83 }
91 84
92 if (kernel_fpu_using()) 85 if (irq_fpu_usable())
93 err = crypto_aes_expand_key(ctx, in_key, key_len); 86 err = crypto_aes_expand_key(ctx, in_key, key_len);
94 else { 87 else {
95 kernel_fpu_begin(); 88 kernel_fpu_begin();
@@ -110,7 +103,7 @@ static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
110{ 103{
111 struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); 104 struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
112 105
113 if (kernel_fpu_using()) 106 if (irq_fpu_usable())
114 crypto_aes_encrypt_x86(ctx, dst, src); 107 crypto_aes_encrypt_x86(ctx, dst, src);
115 else { 108 else {
116 kernel_fpu_begin(); 109 kernel_fpu_begin();
@@ -123,7 +116,7 @@ static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
123{ 116{
124 struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); 117 struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
125 118
126 if (kernel_fpu_using()) 119 if (irq_fpu_usable())
127 crypto_aes_decrypt_x86(ctx, dst, src); 120 crypto_aes_decrypt_x86(ctx, dst, src);
128 else { 121 else {
129 kernel_fpu_begin(); 122 kernel_fpu_begin();
@@ -349,7 +342,7 @@ static int ablk_encrypt(struct ablkcipher_request *req)
349 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); 342 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
350 struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); 343 struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
351 344
352 if (kernel_fpu_using()) { 345 if (irq_fpu_usable()) {
353 struct ablkcipher_request *cryptd_req = 346 struct ablkcipher_request *cryptd_req =
354 ablkcipher_request_ctx(req); 347 ablkcipher_request_ctx(req);
355 memcpy(cryptd_req, req, sizeof(*req)); 348 memcpy(cryptd_req, req, sizeof(*req));
@@ -370,7 +363,7 @@ static int ablk_decrypt(struct ablkcipher_request *req)
370 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); 363 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
371 struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); 364 struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
372 365
373 if (kernel_fpu_using()) { 366 if (irq_fpu_usable()) {
374 struct ablkcipher_request *cryptd_req = 367 struct ablkcipher_request *cryptd_req =
375 ablkcipher_request_ctx(req); 368 ablkcipher_request_ctx(req);
376 memcpy(cryptd_req, req, sizeof(*req)); 369 memcpy(cryptd_req, req, sizeof(*req));
diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index 56be78f582f0..b3ed1e1460ff 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -3,7 +3,7 @@
3 3
4#ifdef __ASSEMBLY__ 4#ifdef __ASSEMBLY__
5# define __ASM_FORM(x) x 5# define __ASM_FORM(x) x
6# define __ASM_EX_SEC .section __ex_table 6# define __ASM_EX_SEC .section __ex_table, "a"
7#else 7#else
8# define __ASM_FORM(x) " " #x " " 8# define __ASM_FORM(x) " " #x " "
9# define __ASM_EX_SEC " .section __ex_table,\"a\"\n" 9# define __ASM_EX_SEC " .section __ex_table,\"a\"\n"
@@ -38,10 +38,18 @@
38#define _ASM_DI __ASM_REG(di) 38#define _ASM_DI __ASM_REG(di)
39 39
40/* Exception table entry */ 40/* Exception table entry */
41#ifdef __ASSEMBLY__
42# define _ASM_EXTABLE(from,to) \
43 __ASM_EX_SEC ; \
44 _ASM_ALIGN ; \
45 _ASM_PTR from , to ; \
46 .previous
47#else
41# define _ASM_EXTABLE(from,to) \ 48# define _ASM_EXTABLE(from,to) \
42 __ASM_EX_SEC \ 49 __ASM_EX_SEC \
43 _ASM_ALIGN "\n" \ 50 _ASM_ALIGN "\n" \
44 _ASM_PTR #from "," #to "\n" \ 51 _ASM_PTR #from "," #to "\n" \
45 " .previous\n" 52 " .previous\n"
53#endif
46 54
47#endif /* _ASM_X86_ASM_H */ 55#endif /* _ASM_X86_ASM_H */
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 4a28d22d4793..847fee6493a2 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -95,6 +95,7 @@
95#define X86_FEATURE_NONSTOP_TSC (3*32+24) /* TSC does not stop in C states */ 95#define X86_FEATURE_NONSTOP_TSC (3*32+24) /* TSC does not stop in C states */
96#define X86_FEATURE_CLFLUSH_MONITOR (3*32+25) /* "" clflush reqd with monitor */ 96#define X86_FEATURE_CLFLUSH_MONITOR (3*32+25) /* "" clflush reqd with monitor */
97#define X86_FEATURE_EXTD_APICID (3*32+26) /* has extended APICID (8 bits) */ 97#define X86_FEATURE_EXTD_APICID (3*32+26) /* has extended APICID (8 bits) */
98#define X86_FEATURE_AMD_DCM (3*32+27) /* multi-node processor */
98 99
99/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */ 100/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
100#define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */ 101#define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */
diff --git a/arch/x86/include/asm/dwarf2.h b/arch/x86/include/asm/dwarf2.h
index 3afc5e87cfdd..ae6253ab9029 100644
--- a/arch/x86/include/asm/dwarf2.h
+++ b/arch/x86/include/asm/dwarf2.h
@@ -87,9 +87,25 @@
87 CFI_RESTORE \reg 87 CFI_RESTORE \reg
88 .endm 88 .endm
89#else /*!CONFIG_X86_64*/ 89#else /*!CONFIG_X86_64*/
90 .macro pushl_cfi reg
91 pushl \reg
92 CFI_ADJUST_CFA_OFFSET 4
93 .endm
90 94
91 /* 32bit defenitions are missed yet */ 95 .macro popl_cfi reg
96 popl \reg
97 CFI_ADJUST_CFA_OFFSET -4
98 .endm
92 99
100 .macro movl_cfi reg offset=0
101 movl %\reg, \offset(%esp)
102 CFI_REL_OFFSET \reg, \offset
103 .endm
104
105 .macro movl_cfi_restore offset reg
106 movl \offset(%esp), %\reg
107 CFI_RESTORE \reg
108 .endm
93#endif /*!CONFIG_X86_64*/ 109#endif /*!CONFIG_X86_64*/
94#endif /*__ASSEMBLY__*/ 110#endif /*__ASSEMBLY__*/
95 111
diff --git a/arch/x86/include/asm/i387.h b/arch/x86/include/asm/i387.h
index 175adf58dd4f..fb7f0d64e14f 100644
--- a/arch/x86/include/asm/i387.h
+++ b/arch/x86/include/asm/i387.h
@@ -301,6 +301,14 @@ static inline void kernel_fpu_end(void)
301 preempt_enable(); 301 preempt_enable();
302} 302}
303 303
304static inline bool irq_fpu_usable(void)
305{
306 struct pt_regs *regs;
307
308 return !in_interrupt() || !(regs = get_irq_regs()) || \
309 user_mode(regs) || (read_cr0() & X86_CR0_TS);
310}
311
304/* 312/*
305 * Some instructions like VIA's padlock instructions generate a spurious 313 * Some instructions like VIA's padlock instructions generate a spurious
306 * DNA fault but don't modify SSE registers. And these instructions 314 * DNA fault but don't modify SSE registers. And these instructions
diff --git a/arch/x86/include/asm/module.h b/arch/x86/include/asm/module.h
index 555bc12bdcd6..3e2ce58a31a3 100644
--- a/arch/x86/include/asm/module.h
+++ b/arch/x86/include/asm/module.h
@@ -17,6 +17,8 @@
17#define MODULE_PROC_FAMILY "586MMX " 17#define MODULE_PROC_FAMILY "586MMX "
18#elif defined CONFIG_MCORE2 18#elif defined CONFIG_MCORE2
19#define MODULE_PROC_FAMILY "CORE2 " 19#define MODULE_PROC_FAMILY "CORE2 "
20#elif defined CONFIG_MATOM
21#define MODULE_PROC_FAMILY "ATOM "
20#elif defined CONFIG_M686 22#elif defined CONFIG_M686
21#define MODULE_PROC_FAMILY "686 " 23#define MODULE_PROC_FAMILY "686 "
22#elif defined CONFIG_MPENTIUMII 24#elif defined CONFIG_MPENTIUMII
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 48ad9d29484a..7e2b6ba962ff 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -3,10 +3,16 @@
3 3
4#include <asm/msr-index.h> 4#include <asm/msr-index.h>
5 5
6#ifdef __KERNEL__
7#ifndef __ASSEMBLY__ 6#ifndef __ASSEMBLY__
8 7
9#include <linux/types.h> 8#include <linux/types.h>
9#include <linux/ioctl.h>
10
11#define X86_IOC_RDMSR_REGS _IOWR('c', 0xA0, __u32[8])
12#define X86_IOC_WRMSR_REGS _IOWR('c', 0xA1, __u32[8])
13
14#ifdef __KERNEL__
15
10#include <asm/asm.h> 16#include <asm/asm.h>
11#include <asm/errno.h> 17#include <asm/errno.h>
12#include <asm/cpumask.h> 18#include <asm/cpumask.h>
@@ -67,23 +73,7 @@ static inline unsigned long long native_read_msr_safe(unsigned int msr,
67 ".previous\n\t" 73 ".previous\n\t"
68 _ASM_EXTABLE(2b, 3b) 74 _ASM_EXTABLE(2b, 3b)
69 : [err] "=r" (*err), EAX_EDX_RET(val, low, high) 75 : [err] "=r" (*err), EAX_EDX_RET(val, low, high)
70 : "c" (msr), [fault] "i" (-EFAULT)); 76 : "c" (msr), [fault] "i" (-EIO));
71 return EAX_EDX_VAL(val, low, high);
72}
73
74static inline unsigned long long native_read_msr_amd_safe(unsigned int msr,
75 int *err)
76{
77 DECLARE_ARGS(val, low, high);
78
79 asm volatile("2: rdmsr ; xor %0,%0\n"
80 "1:\n\t"
81 ".section .fixup,\"ax\"\n\t"
82 "3: mov %3,%0 ; jmp 1b\n\t"
83 ".previous\n\t"
84 _ASM_EXTABLE(2b, 3b)
85 : "=r" (*err), EAX_EDX_RET(val, low, high)
86 : "c" (msr), "D" (0x9c5a203a), "i" (-EFAULT));
87 return EAX_EDX_VAL(val, low, high); 77 return EAX_EDX_VAL(val, low, high);
88} 78}
89 79
@@ -106,13 +96,16 @@ notrace static inline int native_write_msr_safe(unsigned int msr,
106 _ASM_EXTABLE(2b, 3b) 96 _ASM_EXTABLE(2b, 3b)
107 : [err] "=a" (err) 97 : [err] "=a" (err)
108 : "c" (msr), "0" (low), "d" (high), 98 : "c" (msr), "0" (low), "d" (high),
109 [fault] "i" (-EFAULT) 99 [fault] "i" (-EIO)
110 : "memory"); 100 : "memory");
111 return err; 101 return err;
112} 102}
113 103
114extern unsigned long long native_read_tsc(void); 104extern unsigned long long native_read_tsc(void);
115 105
106extern int native_rdmsr_safe_regs(u32 regs[8]);
107extern int native_wrmsr_safe_regs(u32 regs[8]);
108
116static __always_inline unsigned long long __native_read_tsc(void) 109static __always_inline unsigned long long __native_read_tsc(void)
117{ 110{
118 DECLARE_ARGS(val, low, high); 111 DECLARE_ARGS(val, low, high);
@@ -181,14 +174,44 @@ static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
181 *p = native_read_msr_safe(msr, &err); 174 *p = native_read_msr_safe(msr, &err);
182 return err; 175 return err;
183} 176}
177
184static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p) 178static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p)
185{ 179{
180 u32 gprs[8] = { 0 };
186 int err; 181 int err;
187 182
188 *p = native_read_msr_amd_safe(msr, &err); 183 gprs[1] = msr;
184 gprs[7] = 0x9c5a203a;
185
186 err = native_rdmsr_safe_regs(gprs);
187
188 *p = gprs[0] | ((u64)gprs[2] << 32);
189
189 return err; 190 return err;
190} 191}
191 192
193static inline int wrmsrl_amd_safe(unsigned msr, unsigned long long val)
194{
195 u32 gprs[8] = { 0 };
196
197 gprs[0] = (u32)val;
198 gprs[1] = msr;
199 gprs[2] = val >> 32;
200 gprs[7] = 0x9c5a203a;
201
202 return native_wrmsr_safe_regs(gprs);
203}
204
205static inline int rdmsr_safe_regs(u32 regs[8])
206{
207 return native_rdmsr_safe_regs(regs);
208}
209
210static inline int wrmsr_safe_regs(u32 regs[8])
211{
212 return native_wrmsr_safe_regs(regs);
213}
214
192#define rdtscl(low) \ 215#define rdtscl(low) \
193 ((low) = (u32)__native_read_tsc()) 216 ((low) = (u32)__native_read_tsc())
194 217
@@ -228,6 +251,8 @@ void rdmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs);
228void wrmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs); 251void wrmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs);
229int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); 252int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h);
230int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); 253int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h);
254int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8]);
255int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8]);
231#else /* CONFIG_SMP */ 256#else /* CONFIG_SMP */
232static inline int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) 257static inline int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
233{ 258{
@@ -258,7 +283,15 @@ static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
258{ 283{
259 return wrmsr_safe(msr_no, l, h); 284 return wrmsr_safe(msr_no, l, h);
260} 285}
286static inline int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8])
287{
288 return rdmsr_safe_regs(regs);
289}
290static inline int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8])
291{
292 return wrmsr_safe_regs(regs);
293}
261#endif /* CONFIG_SMP */ 294#endif /* CONFIG_SMP */
262#endif /* __ASSEMBLY__ */
263#endif /* __KERNEL__ */ 295#endif /* __KERNEL__ */
296#endif /* __ASSEMBLY__ */
264#endif /* _ASM_X86_MSR_H */ 297#endif /* _ASM_X86_MSR_H */
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 4fb37c8a0832..40d6586af25b 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -7,689 +7,11 @@
7#include <asm/pgtable_types.h> 7#include <asm/pgtable_types.h>
8#include <asm/asm.h> 8#include <asm/asm.h>
9 9
10/* Bitmask of what can be clobbered: usually at least eax. */ 10#include <asm/paravirt_types.h>
11#define CLBR_NONE 0
12#define CLBR_EAX (1 << 0)
13#define CLBR_ECX (1 << 1)
14#define CLBR_EDX (1 << 2)
15#define CLBR_EDI (1 << 3)
16
17#ifdef CONFIG_X86_32
18/* CLBR_ANY should match all regs platform has. For i386, that's just it */
19#define CLBR_ANY ((1 << 4) - 1)
20
21#define CLBR_ARG_REGS (CLBR_EAX | CLBR_EDX | CLBR_ECX)
22#define CLBR_RET_REG (CLBR_EAX | CLBR_EDX)
23#define CLBR_SCRATCH (0)
24#else
25#define CLBR_RAX CLBR_EAX
26#define CLBR_RCX CLBR_ECX
27#define CLBR_RDX CLBR_EDX
28#define CLBR_RDI CLBR_EDI
29#define CLBR_RSI (1 << 4)
30#define CLBR_R8 (1 << 5)
31#define CLBR_R9 (1 << 6)
32#define CLBR_R10 (1 << 7)
33#define CLBR_R11 (1 << 8)
34
35#define CLBR_ANY ((1 << 9) - 1)
36
37#define CLBR_ARG_REGS (CLBR_RDI | CLBR_RSI | CLBR_RDX | \
38 CLBR_RCX | CLBR_R8 | CLBR_R9)
39#define CLBR_RET_REG (CLBR_RAX)
40#define CLBR_SCRATCH (CLBR_R10 | CLBR_R11)
41
42#include <asm/desc_defs.h>
43#endif /* X86_64 */
44
45#define CLBR_CALLEE_SAVE ((CLBR_ARG_REGS | CLBR_SCRATCH) & ~CLBR_RET_REG)
46 11
47#ifndef __ASSEMBLY__ 12#ifndef __ASSEMBLY__
48#include <linux/types.h> 13#include <linux/types.h>
49#include <linux/cpumask.h> 14#include <linux/cpumask.h>
50#include <asm/kmap_types.h>
51#include <asm/desc_defs.h>
52
53struct page;
54struct thread_struct;
55struct desc_ptr;
56struct tss_struct;
57struct mm_struct;
58struct desc_struct;
59struct task_struct;
60
61/*
62 * Wrapper type for pointers to code which uses the non-standard
63 * calling convention. See PV_CALL_SAVE_REGS_THUNK below.
64 */
65struct paravirt_callee_save {
66 void *func;
67};
68
69/* general info */
70struct pv_info {
71 unsigned int kernel_rpl;
72 int shared_kernel_pmd;
73 int paravirt_enabled;
74 const char *name;
75};
76
77struct pv_init_ops {
78 /*
79 * Patch may replace one of the defined code sequences with
80 * arbitrary code, subject to the same register constraints.
81 * This generally means the code is not free to clobber any
82 * registers other than EAX. The patch function should return
83 * the number of bytes of code generated, as we nop pad the
84 * rest in generic code.
85 */
86 unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
87 unsigned long addr, unsigned len);
88
89 /* Basic arch-specific setup */
90 void (*arch_setup)(void);
91 char *(*memory_setup)(void);
92 void (*post_allocator_init)(void);
93
94 /* Print a banner to identify the environment */
95 void (*banner)(void);
96};
97
98
99struct pv_lazy_ops {
100 /* Set deferred update mode, used for batching operations. */
101 void (*enter)(void);
102 void (*leave)(void);
103};
104
105struct pv_time_ops {
106 void (*time_init)(void);
107
108 /* Set and set time of day */
109 unsigned long (*get_wallclock)(void);
110 int (*set_wallclock)(unsigned long);
111
112 unsigned long long (*sched_clock)(void);
113 unsigned long (*get_tsc_khz)(void);
114};
115
116struct pv_cpu_ops {
117 /* hooks for various privileged instructions */
118 unsigned long (*get_debugreg)(int regno);
119 void (*set_debugreg)(int regno, unsigned long value);
120
121 void (*clts)(void);
122
123 unsigned long (*read_cr0)(void);
124 void (*write_cr0)(unsigned long);
125
126 unsigned long (*read_cr4_safe)(void);
127 unsigned long (*read_cr4)(void);
128 void (*write_cr4)(unsigned long);
129
130#ifdef CONFIG_X86_64
131 unsigned long (*read_cr8)(void);
132 void (*write_cr8)(unsigned long);
133#endif
134
135 /* Segment descriptor handling */
136 void (*load_tr_desc)(void);
137 void (*load_gdt)(const struct desc_ptr *);
138 void (*load_idt)(const struct desc_ptr *);
139 void (*store_gdt)(struct desc_ptr *);
140 void (*store_idt)(struct desc_ptr *);
141 void (*set_ldt)(const void *desc, unsigned entries);
142 unsigned long (*store_tr)(void);
143 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
144#ifdef CONFIG_X86_64
145 void (*load_gs_index)(unsigned int idx);
146#endif
147 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
148 const void *desc);
149 void (*write_gdt_entry)(struct desc_struct *,
150 int entrynum, const void *desc, int size);
151 void (*write_idt_entry)(gate_desc *,
152 int entrynum, const gate_desc *gate);
153 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries);
154 void (*free_ldt)(struct desc_struct *ldt, unsigned entries);
155
156 void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
157
158 void (*set_iopl_mask)(unsigned mask);
159
160 void (*wbinvd)(void);
161 void (*io_delay)(void);
162
163 /* cpuid emulation, mostly so that caps bits can be disabled */
164 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
165 unsigned int *ecx, unsigned int *edx);
166
167 /* MSR, PMC and TSR operations.
168 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
169 u64 (*read_msr_amd)(unsigned int msr, int *err);
170 u64 (*read_msr)(unsigned int msr, int *err);
171 int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
172
173 u64 (*read_tsc)(void);
174 u64 (*read_pmc)(int counter);
175 unsigned long long (*read_tscp)(unsigned int *aux);
176
177 /*
178 * Atomically enable interrupts and return to userspace. This
179 * is only ever used to return to 32-bit processes; in a
180 * 64-bit kernel, it's used for 32-on-64 compat processes, but
181 * never native 64-bit processes. (Jump, not call.)
182 */
183 void (*irq_enable_sysexit)(void);
184
185 /*
186 * Switch to usermode gs and return to 64-bit usermode using
187 * sysret. Only used in 64-bit kernels to return to 64-bit
188 * processes. Usermode register state, including %rsp, must
189 * already be restored.
190 */
191 void (*usergs_sysret64)(void);
192
193 /*
194 * Switch to usermode gs and return to 32-bit usermode using
195 * sysret. Used to return to 32-on-64 compat processes.
196 * Other usermode register state, including %esp, must already
197 * be restored.
198 */
199 void (*usergs_sysret32)(void);
200
201 /* Normal iret. Jump to this with the standard iret stack
202 frame set up. */
203 void (*iret)(void);
204
205 void (*swapgs)(void);
206
207 void (*start_context_switch)(struct task_struct *prev);
208 void (*end_context_switch)(struct task_struct *next);
209};
210
211struct pv_irq_ops {
212 void (*init_IRQ)(void);
213
214 /*
215 * Get/set interrupt state. save_fl and restore_fl are only
216 * expected to use X86_EFLAGS_IF; all other bits
217 * returned from save_fl are undefined, and may be ignored by
218 * restore_fl.
219 *
220 * NOTE: These functions callers expect the callee to preserve
221 * more registers than the standard C calling convention.
222 */
223 struct paravirt_callee_save save_fl;
224 struct paravirt_callee_save restore_fl;
225 struct paravirt_callee_save irq_disable;
226 struct paravirt_callee_save irq_enable;
227
228 void (*safe_halt)(void);
229 void (*halt)(void);
230
231#ifdef CONFIG_X86_64
232 void (*adjust_exception_frame)(void);
233#endif
234};
235
236struct pv_apic_ops {
237#ifdef CONFIG_X86_LOCAL_APIC
238 void (*setup_boot_clock)(void);
239 void (*setup_secondary_clock)(void);
240
241 void (*startup_ipi_hook)(int phys_apicid,
242 unsigned long start_eip,
243 unsigned long start_esp);
244#endif
245};
246
247struct pv_mmu_ops {
248 /*
249 * Called before/after init_mm pagetable setup. setup_start
250 * may reset %cr3, and may pre-install parts of the pagetable;
251 * pagetable setup is expected to preserve any existing
252 * mapping.
253 */
254 void (*pagetable_setup_start)(pgd_t *pgd_base);
255 void (*pagetable_setup_done)(pgd_t *pgd_base);
256
257 unsigned long (*read_cr2)(void);
258 void (*write_cr2)(unsigned long);
259
260 unsigned long (*read_cr3)(void);
261 void (*write_cr3)(unsigned long);
262
263 /*
264 * Hooks for intercepting the creation/use/destruction of an
265 * mm_struct.
266 */
267 void (*activate_mm)(struct mm_struct *prev,
268 struct mm_struct *next);
269 void (*dup_mmap)(struct mm_struct *oldmm,
270 struct mm_struct *mm);
271 void (*exit_mmap)(struct mm_struct *mm);
272
273
274 /* TLB operations */
275 void (*flush_tlb_user)(void);
276 void (*flush_tlb_kernel)(void);
277 void (*flush_tlb_single)(unsigned long addr);
278 void (*flush_tlb_others)(const struct cpumask *cpus,
279 struct mm_struct *mm,
280 unsigned long va);
281
282 /* Hooks for allocating and freeing a pagetable top-level */
283 int (*pgd_alloc)(struct mm_struct *mm);
284 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd);
285
286 /*
287 * Hooks for allocating/releasing pagetable pages when they're
288 * attached to a pagetable
289 */
290 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn);
291 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn);
292 void (*alloc_pmd_clone)(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count);
293 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn);
294 void (*release_pte)(unsigned long pfn);
295 void (*release_pmd)(unsigned long pfn);
296 void (*release_pud)(unsigned long pfn);
297
298 /* Pagetable manipulation functions */
299 void (*set_pte)(pte_t *ptep, pte_t pteval);
300 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
301 pte_t *ptep, pte_t pteval);
302 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
303 void (*pte_update)(struct mm_struct *mm, unsigned long addr,
304 pte_t *ptep);
305 void (*pte_update_defer)(struct mm_struct *mm,
306 unsigned long addr, pte_t *ptep);
307
308 pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr,
309 pte_t *ptep);
310 void (*ptep_modify_prot_commit)(struct mm_struct *mm, unsigned long addr,
311 pte_t *ptep, pte_t pte);
312
313 struct paravirt_callee_save pte_val;
314 struct paravirt_callee_save make_pte;
315
316 struct paravirt_callee_save pgd_val;
317 struct paravirt_callee_save make_pgd;
318
319#if PAGETABLE_LEVELS >= 3
320#ifdef CONFIG_X86_PAE
321 void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
322 void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
323 pte_t *ptep);
324 void (*pmd_clear)(pmd_t *pmdp);
325
326#endif /* CONFIG_X86_PAE */
327
328 void (*set_pud)(pud_t *pudp, pud_t pudval);
329
330 struct paravirt_callee_save pmd_val;
331 struct paravirt_callee_save make_pmd;
332
333#if PAGETABLE_LEVELS == 4
334 struct paravirt_callee_save pud_val;
335 struct paravirt_callee_save make_pud;
336
337 void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
338#endif /* PAGETABLE_LEVELS == 4 */
339#endif /* PAGETABLE_LEVELS >= 3 */
340
341#ifdef CONFIG_HIGHPTE
342 void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
343#endif
344
345 struct pv_lazy_ops lazy_mode;
346
347 /* dom0 ops */
348
349 /* Sometimes the physical address is a pfn, and sometimes its
350 an mfn. We can tell which is which from the index. */
351 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
352 phys_addr_t phys, pgprot_t flags);
353};
354
355struct raw_spinlock;
356struct pv_lock_ops {
357 int (*spin_is_locked)(struct raw_spinlock *lock);
358 int (*spin_is_contended)(struct raw_spinlock *lock);
359 void (*spin_lock)(struct raw_spinlock *lock);
360 void (*spin_lock_flags)(struct raw_spinlock *lock, unsigned long flags);
361 int (*spin_trylock)(struct raw_spinlock *lock);
362 void (*spin_unlock)(struct raw_spinlock *lock);
363};
364
365/* This contains all the paravirt structures: we get a convenient
366 * number for each function using the offset which we use to indicate
367 * what to patch. */
368struct paravirt_patch_template {
369 struct pv_init_ops pv_init_ops;
370 struct pv_time_ops pv_time_ops;
371 struct pv_cpu_ops pv_cpu_ops;
372 struct pv_irq_ops pv_irq_ops;
373 struct pv_apic_ops pv_apic_ops;
374 struct pv_mmu_ops pv_mmu_ops;
375 struct pv_lock_ops pv_lock_ops;
376};
377
378extern struct pv_info pv_info;
379extern struct pv_init_ops pv_init_ops;
380extern struct pv_time_ops pv_time_ops;
381extern struct pv_cpu_ops pv_cpu_ops;
382extern struct pv_irq_ops pv_irq_ops;
383extern struct pv_apic_ops pv_apic_ops;
384extern struct pv_mmu_ops pv_mmu_ops;
385extern struct pv_lock_ops pv_lock_ops;
386
387#define PARAVIRT_PATCH(x) \
388 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
389
390#define paravirt_type(op) \
391 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
392 [paravirt_opptr] "i" (&(op))
393#define paravirt_clobber(clobber) \
394 [paravirt_clobber] "i" (clobber)
395
396/*
397 * Generate some code, and mark it as patchable by the
398 * apply_paravirt() alternate instruction patcher.
399 */
400#define _paravirt_alt(insn_string, type, clobber) \
401 "771:\n\t" insn_string "\n" "772:\n" \
402 ".pushsection .parainstructions,\"a\"\n" \
403 _ASM_ALIGN "\n" \
404 _ASM_PTR " 771b\n" \
405 " .byte " type "\n" \
406 " .byte 772b-771b\n" \
407 " .short " clobber "\n" \
408 ".popsection\n"
409
410/* Generate patchable code, with the default asm parameters. */
411#define paravirt_alt(insn_string) \
412 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
413
414/* Simple instruction patching code. */
415#define DEF_NATIVE(ops, name, code) \
416 extern const char start_##ops##_##name[], end_##ops##_##name[]; \
417 asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
418
419unsigned paravirt_patch_nop(void);
420unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
421unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
422unsigned paravirt_patch_ignore(unsigned len);
423unsigned paravirt_patch_call(void *insnbuf,
424 const void *target, u16 tgt_clobbers,
425 unsigned long addr, u16 site_clobbers,
426 unsigned len);
427unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
428 unsigned long addr, unsigned len);
429unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
430 unsigned long addr, unsigned len);
431
432unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
433 const char *start, const char *end);
434
435unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
436 unsigned long addr, unsigned len);
437
438int paravirt_disable_iospace(void);
439
440/*
441 * This generates an indirect call based on the operation type number.
442 * The type number, computed in PARAVIRT_PATCH, is derived from the
443 * offset into the paravirt_patch_template structure, and can therefore be
444 * freely converted back into a structure offset.
445 */
446#define PARAVIRT_CALL "call *%c[paravirt_opptr];"
447
448/*
449 * These macros are intended to wrap calls through one of the paravirt
450 * ops structs, so that they can be later identified and patched at
451 * runtime.
452 *
453 * Normally, a call to a pv_op function is a simple indirect call:
454 * (pv_op_struct.operations)(args...).
455 *
456 * Unfortunately, this is a relatively slow operation for modern CPUs,
457 * because it cannot necessarily determine what the destination
458 * address is. In this case, the address is a runtime constant, so at
459 * the very least we can patch the call to e a simple direct call, or
460 * ideally, patch an inline implementation into the callsite. (Direct
461 * calls are essentially free, because the call and return addresses
462 * are completely predictable.)
463 *
464 * For i386, these macros rely on the standard gcc "regparm(3)" calling
465 * convention, in which the first three arguments are placed in %eax,
466 * %edx, %ecx (in that order), and the remaining arguments are placed
467 * on the stack. All caller-save registers (eax,edx,ecx) are expected
468 * to be modified (either clobbered or used for return values).
469 * X86_64, on the other hand, already specifies a register-based calling
470 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
471 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
472 * special handling for dealing with 4 arguments, unlike i386.
473 * However, x86_64 also have to clobber all caller saved registers, which
474 * unfortunately, are quite a bit (r8 - r11)
475 *
476 * The call instruction itself is marked by placing its start address
477 * and size into the .parainstructions section, so that
478 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
479 * appropriate patching under the control of the backend pv_init_ops
480 * implementation.
481 *
482 * Unfortunately there's no way to get gcc to generate the args setup
483 * for the call, and then allow the call itself to be generated by an
484 * inline asm. Because of this, we must do the complete arg setup and
485 * return value handling from within these macros. This is fairly
486 * cumbersome.
487 *
488 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
489 * It could be extended to more arguments, but there would be little
490 * to be gained from that. For each number of arguments, there are
491 * the two VCALL and CALL variants for void and non-void functions.
492 *
493 * When there is a return value, the invoker of the macro must specify
494 * the return type. The macro then uses sizeof() on that type to
495 * determine whether its a 32 or 64 bit value, and places the return
496 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
497 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
498 * the return value size.
499 *
500 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
501 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
502 * in low,high order
503 *
504 * Small structures are passed and returned in registers. The macro
505 * calling convention can't directly deal with this, so the wrapper
506 * functions must do this.
507 *
508 * These PVOP_* macros are only defined within this header. This
509 * means that all uses must be wrapped in inline functions. This also
510 * makes sure the incoming and outgoing types are always correct.
511 */
512#ifdef CONFIG_X86_32
513#define PVOP_VCALL_ARGS \
514 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx
515#define PVOP_CALL_ARGS PVOP_VCALL_ARGS
516
517#define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
518#define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
519#define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
520
521#define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
522 "=c" (__ecx)
523#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
524
525#define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
526#define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
527
528#define EXTRA_CLOBBERS
529#define VEXTRA_CLOBBERS
530#else /* CONFIG_X86_64 */
531#define PVOP_VCALL_ARGS \
532 unsigned long __edi = __edi, __esi = __esi, \
533 __edx = __edx, __ecx = __ecx
534#define PVOP_CALL_ARGS PVOP_VCALL_ARGS, __eax
535
536#define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
537#define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
538#define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
539#define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
540
541#define PVOP_VCALL_CLOBBERS "=D" (__edi), \
542 "=S" (__esi), "=d" (__edx), \
543 "=c" (__ecx)
544#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
545
546#define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
547#define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
548
549#define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
550#define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
551#endif /* CONFIG_X86_32 */
552
553#ifdef CONFIG_PARAVIRT_DEBUG
554#define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
555#else
556#define PVOP_TEST_NULL(op) ((void)op)
557#endif
558
559#define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \
560 pre, post, ...) \
561 ({ \
562 rettype __ret; \
563 PVOP_CALL_ARGS; \
564 PVOP_TEST_NULL(op); \
565 /* This is 32-bit specific, but is okay in 64-bit */ \
566 /* since this condition will never hold */ \
567 if (sizeof(rettype) > sizeof(unsigned long)) { \
568 asm volatile(pre \
569 paravirt_alt(PARAVIRT_CALL) \
570 post \
571 : call_clbr \
572 : paravirt_type(op), \
573 paravirt_clobber(clbr), \
574 ##__VA_ARGS__ \
575 : "memory", "cc" extra_clbr); \
576 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
577 } else { \
578 asm volatile(pre \
579 paravirt_alt(PARAVIRT_CALL) \
580 post \
581 : call_clbr \
582 : paravirt_type(op), \
583 paravirt_clobber(clbr), \
584 ##__VA_ARGS__ \
585 : "memory", "cc" extra_clbr); \
586 __ret = (rettype)__eax; \
587 } \
588 __ret; \
589 })
590
591#define __PVOP_CALL(rettype, op, pre, post, ...) \
592 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \
593 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__)
594
595#define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \
596 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
597 PVOP_CALLEE_CLOBBERS, , \
598 pre, post, ##__VA_ARGS__)
599
600
601#define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \
602 ({ \
603 PVOP_VCALL_ARGS; \
604 PVOP_TEST_NULL(op); \
605 asm volatile(pre \
606 paravirt_alt(PARAVIRT_CALL) \
607 post \
608 : call_clbr \
609 : paravirt_type(op), \
610 paravirt_clobber(clbr), \
611 ##__VA_ARGS__ \
612 : "memory", "cc" extra_clbr); \
613 })
614
615#define __PVOP_VCALL(op, pre, post, ...) \
616 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
617 VEXTRA_CLOBBERS, \
618 pre, post, ##__VA_ARGS__)
619
620#define __PVOP_VCALLEESAVE(rettype, op, pre, post, ...) \
621 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
622 PVOP_VCALLEE_CLOBBERS, , \
623 pre, post, ##__VA_ARGS__)
624
625
626
627#define PVOP_CALL0(rettype, op) \
628 __PVOP_CALL(rettype, op, "", "")
629#define PVOP_VCALL0(op) \
630 __PVOP_VCALL(op, "", "")
631
632#define PVOP_CALLEE0(rettype, op) \
633 __PVOP_CALLEESAVE(rettype, op, "", "")
634#define PVOP_VCALLEE0(op) \
635 __PVOP_VCALLEESAVE(op, "", "")
636
637
638#define PVOP_CALL1(rettype, op, arg1) \
639 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
640#define PVOP_VCALL1(op, arg1) \
641 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1))
642
643#define PVOP_CALLEE1(rettype, op, arg1) \
644 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
645#define PVOP_VCALLEE1(op, arg1) \
646 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1))
647
648
649#define PVOP_CALL2(rettype, op, arg1, arg2) \
650 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
651 PVOP_CALL_ARG2(arg2))
652#define PVOP_VCALL2(op, arg1, arg2) \
653 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
654 PVOP_CALL_ARG2(arg2))
655
656#define PVOP_CALLEE2(rettype, op, arg1, arg2) \
657 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
658 PVOP_CALL_ARG2(arg2))
659#define PVOP_VCALLEE2(op, arg1, arg2) \
660 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \
661 PVOP_CALL_ARG2(arg2))
662
663
664#define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
665 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
666 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
667#define PVOP_VCALL3(op, arg1, arg2, arg3) \
668 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
669 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
670
671/* This is the only difference in x86_64. We can make it much simpler */
672#ifdef CONFIG_X86_32
673#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
674 __PVOP_CALL(rettype, op, \
675 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
676 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
677 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4)))
678#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
679 __PVOP_VCALL(op, \
680 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
681 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
682 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
683#else
684#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
685 __PVOP_CALL(rettype, op, "", "", \
686 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
687 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
688#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
689 __PVOP_VCALL(op, "", "", \
690 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
691 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
692#endif
693 15
694static inline int paravirt_enabled(void) 16static inline int paravirt_enabled(void)
695{ 17{
@@ -820,15 +142,22 @@ static inline u64 paravirt_read_msr(unsigned msr, int *err)
820{ 142{
821 return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err); 143 return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err);
822} 144}
823static inline u64 paravirt_read_msr_amd(unsigned msr, int *err) 145
146static inline int paravirt_rdmsr_regs(u32 *regs)
824{ 147{
825 return PVOP_CALL2(u64, pv_cpu_ops.read_msr_amd, msr, err); 148 return PVOP_CALL1(int, pv_cpu_ops.rdmsr_regs, regs);
826} 149}
150
827static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high) 151static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
828{ 152{
829 return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high); 153 return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high);
830} 154}
831 155
156static inline int paravirt_wrmsr_regs(u32 *regs)
157{
158 return PVOP_CALL1(int, pv_cpu_ops.wrmsr_regs, regs);
159}
160
832/* These should all do BUG_ON(_err), but our headers are too tangled. */ 161/* These should all do BUG_ON(_err), but our headers are too tangled. */
833#define rdmsr(msr, val1, val2) \ 162#define rdmsr(msr, val1, val2) \
834do { \ 163do { \
@@ -862,6 +191,9 @@ do { \
862 _err; \ 191 _err; \
863}) 192})
864 193
194#define rdmsr_safe_regs(regs) paravirt_rdmsr_regs(regs)
195#define wrmsr_safe_regs(regs) paravirt_wrmsr_regs(regs)
196
865static inline int rdmsrl_safe(unsigned msr, unsigned long long *p) 197static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
866{ 198{
867 int err; 199 int err;
@@ -871,12 +203,31 @@ static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
871} 203}
872static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p) 204static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p)
873{ 205{
206 u32 gprs[8] = { 0 };
874 int err; 207 int err;
875 208
876 *p = paravirt_read_msr_amd(msr, &err); 209 gprs[1] = msr;
210 gprs[7] = 0x9c5a203a;
211
212 err = paravirt_rdmsr_regs(gprs);
213
214 *p = gprs[0] | ((u64)gprs[2] << 32);
215
877 return err; 216 return err;
878} 217}
879 218
219static inline int wrmsrl_amd_safe(unsigned msr, unsigned long long val)
220{
221 u32 gprs[8] = { 0 };
222
223 gprs[0] = (u32)val;
224 gprs[1] = msr;
225 gprs[2] = val >> 32;
226 gprs[7] = 0x9c5a203a;
227
228 return paravirt_wrmsr_regs(gprs);
229}
230
880static inline u64 paravirt_read_tsc(void) 231static inline u64 paravirt_read_tsc(void)
881{ 232{
882 return PVOP_CALL0(u64, pv_cpu_ops.read_tsc); 233 return PVOP_CALL0(u64, pv_cpu_ops.read_tsc);
@@ -1393,20 +744,6 @@ static inline void pmd_clear(pmd_t *pmdp)
1393} 744}
1394#endif /* CONFIG_X86_PAE */ 745#endif /* CONFIG_X86_PAE */
1395 746
1396/* Lazy mode for batching updates / context switch */
1397enum paravirt_lazy_mode {
1398 PARAVIRT_LAZY_NONE,
1399 PARAVIRT_LAZY_MMU,
1400 PARAVIRT_LAZY_CPU,
1401};
1402
1403enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
1404void paravirt_start_context_switch(struct task_struct *prev);
1405void paravirt_end_context_switch(struct task_struct *next);
1406
1407void paravirt_enter_lazy_mmu(void);
1408void paravirt_leave_lazy_mmu(void);
1409
1410#define __HAVE_ARCH_START_CONTEXT_SWITCH 747#define __HAVE_ARCH_START_CONTEXT_SWITCH
1411static inline void arch_start_context_switch(struct task_struct *prev) 748static inline void arch_start_context_switch(struct task_struct *prev)
1412{ 749{
@@ -1437,12 +774,6 @@ static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
1437 pv_mmu_ops.set_fixmap(idx, phys, flags); 774 pv_mmu_ops.set_fixmap(idx, phys, flags);
1438} 775}
1439 776
1440void _paravirt_nop(void);
1441u32 _paravirt_ident_32(u32);
1442u64 _paravirt_ident_64(u64);
1443
1444#define paravirt_nop ((void *)_paravirt_nop)
1445
1446#if defined(CONFIG_SMP) && defined(CONFIG_PARAVIRT_SPINLOCKS) 777#if defined(CONFIG_SMP) && defined(CONFIG_PARAVIRT_SPINLOCKS)
1447 778
1448static inline int __raw_spin_is_locked(struct raw_spinlock *lock) 779static inline int __raw_spin_is_locked(struct raw_spinlock *lock)
@@ -1479,17 +810,6 @@ static __always_inline void __raw_spin_unlock(struct raw_spinlock *lock)
1479 810
1480#endif 811#endif
1481 812
1482/* These all sit in the .parainstructions section to tell us what to patch. */
1483struct paravirt_patch_site {
1484 u8 *instr; /* original instructions */
1485 u8 instrtype; /* type of this instruction */
1486 u8 len; /* length of original instruction */
1487 u16 clobbers; /* what registers you may clobber */
1488};
1489
1490extern struct paravirt_patch_site __parainstructions[],
1491 __parainstructions_end[];
1492
1493#ifdef CONFIG_X86_32 813#ifdef CONFIG_X86_32
1494#define PV_SAVE_REGS "pushl %ecx; pushl %edx;" 814#define PV_SAVE_REGS "pushl %ecx; pushl %edx;"
1495#define PV_RESTORE_REGS "popl %edx; popl %ecx;" 815#define PV_RESTORE_REGS "popl %edx; popl %ecx;"
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
new file mode 100644
index 000000000000..25402d0006e7
--- /dev/null
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -0,0 +1,721 @@
1#ifndef _ASM_X86_PARAVIRT_TYPES_H
2#define _ASM_X86_PARAVIRT_TYPES_H
3
4/* Bitmask of what can be clobbered: usually at least eax. */
5#define CLBR_NONE 0
6#define CLBR_EAX (1 << 0)
7#define CLBR_ECX (1 << 1)
8#define CLBR_EDX (1 << 2)
9#define CLBR_EDI (1 << 3)
10
11#ifdef CONFIG_X86_32
12/* CLBR_ANY should match all regs platform has. For i386, that's just it */
13#define CLBR_ANY ((1 << 4) - 1)
14
15#define CLBR_ARG_REGS (CLBR_EAX | CLBR_EDX | CLBR_ECX)
16#define CLBR_RET_REG (CLBR_EAX | CLBR_EDX)
17#define CLBR_SCRATCH (0)
18#else
19#define CLBR_RAX CLBR_EAX
20#define CLBR_RCX CLBR_ECX
21#define CLBR_RDX CLBR_EDX
22#define CLBR_RDI CLBR_EDI
23#define CLBR_RSI (1 << 4)
24#define CLBR_R8 (1 << 5)
25#define CLBR_R9 (1 << 6)
26#define CLBR_R10 (1 << 7)
27#define CLBR_R11 (1 << 8)
28
29#define CLBR_ANY ((1 << 9) - 1)
30
31#define CLBR_ARG_REGS (CLBR_RDI | CLBR_RSI | CLBR_RDX | \
32 CLBR_RCX | CLBR_R8 | CLBR_R9)
33#define CLBR_RET_REG (CLBR_RAX)
34#define CLBR_SCRATCH (CLBR_R10 | CLBR_R11)
35
36#endif /* X86_64 */
37
38#define CLBR_CALLEE_SAVE ((CLBR_ARG_REGS | CLBR_SCRATCH) & ~CLBR_RET_REG)
39
40#ifndef __ASSEMBLY__
41
42#include <asm/desc_defs.h>
43#include <asm/kmap_types.h>
44
45struct page;
46struct thread_struct;
47struct desc_ptr;
48struct tss_struct;
49struct mm_struct;
50struct desc_struct;
51struct task_struct;
52struct cpumask;
53
54/*
55 * Wrapper type for pointers to code which uses the non-standard
56 * calling convention. See PV_CALL_SAVE_REGS_THUNK below.
57 */
58struct paravirt_callee_save {
59 void *func;
60};
61
62/* general info */
63struct pv_info {
64 unsigned int kernel_rpl;
65 int shared_kernel_pmd;
66 int paravirt_enabled;
67 const char *name;
68};
69
70struct pv_init_ops {
71 /*
72 * Patch may replace one of the defined code sequences with
73 * arbitrary code, subject to the same register constraints.
74 * This generally means the code is not free to clobber any
75 * registers other than EAX. The patch function should return
76 * the number of bytes of code generated, as we nop pad the
77 * rest in generic code.
78 */
79 unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
80 unsigned long addr, unsigned len);
81
82 /* Basic arch-specific setup */
83 void (*arch_setup)(void);
84 char *(*memory_setup)(void);
85 void (*post_allocator_init)(void);
86
87 /* Print a banner to identify the environment */
88 void (*banner)(void);
89};
90
91
92struct pv_lazy_ops {
93 /* Set deferred update mode, used for batching operations. */
94 void (*enter)(void);
95 void (*leave)(void);
96};
97
98struct pv_time_ops {
99 void (*time_init)(void);
100
101 /* Set and set time of day */
102 unsigned long (*get_wallclock)(void);
103 int (*set_wallclock)(unsigned long);
104
105 unsigned long long (*sched_clock)(void);
106 unsigned long (*get_tsc_khz)(void);
107};
108
109struct pv_cpu_ops {
110 /* hooks for various privileged instructions */
111 unsigned long (*get_debugreg)(int regno);
112 void (*set_debugreg)(int regno, unsigned long value);
113
114 void (*clts)(void);
115
116 unsigned long (*read_cr0)(void);
117 void (*write_cr0)(unsigned long);
118
119 unsigned long (*read_cr4_safe)(void);
120 unsigned long (*read_cr4)(void);
121 void (*write_cr4)(unsigned long);
122
123#ifdef CONFIG_X86_64
124 unsigned long (*read_cr8)(void);
125 void (*write_cr8)(unsigned long);
126#endif
127
128 /* Segment descriptor handling */
129 void (*load_tr_desc)(void);
130 void (*load_gdt)(const struct desc_ptr *);
131 void (*load_idt)(const struct desc_ptr *);
132 void (*store_gdt)(struct desc_ptr *);
133 void (*store_idt)(struct desc_ptr *);
134 void (*set_ldt)(const void *desc, unsigned entries);
135 unsigned long (*store_tr)(void);
136 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
137#ifdef CONFIG_X86_64
138 void (*load_gs_index)(unsigned int idx);
139#endif
140 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
141 const void *desc);
142 void (*write_gdt_entry)(struct desc_struct *,
143 int entrynum, const void *desc, int size);
144 void (*write_idt_entry)(gate_desc *,
145 int entrynum, const gate_desc *gate);
146 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries);
147 void (*free_ldt)(struct desc_struct *ldt, unsigned entries);
148
149 void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
150
151 void (*set_iopl_mask)(unsigned mask);
152
153 void (*wbinvd)(void);
154 void (*io_delay)(void);
155
156 /* cpuid emulation, mostly so that caps bits can be disabled */
157 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
158 unsigned int *ecx, unsigned int *edx);
159
160 /* MSR, PMC and TSR operations.
161 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
162 u64 (*read_msr)(unsigned int msr, int *err);
163 int (*rdmsr_regs)(u32 *regs);
164 int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
165 int (*wrmsr_regs)(u32 *regs);
166
167 u64 (*read_tsc)(void);
168 u64 (*read_pmc)(int counter);
169 unsigned long long (*read_tscp)(unsigned int *aux);
170
171 /*
172 * Atomically enable interrupts and return to userspace. This
173 * is only ever used to return to 32-bit processes; in a
174 * 64-bit kernel, it's used for 32-on-64 compat processes, but
175 * never native 64-bit processes. (Jump, not call.)
176 */
177 void (*irq_enable_sysexit)(void);
178
179 /*
180 * Switch to usermode gs and return to 64-bit usermode using
181 * sysret. Only used in 64-bit kernels to return to 64-bit
182 * processes. Usermode register state, including %rsp, must
183 * already be restored.
184 */
185 void (*usergs_sysret64)(void);
186
187 /*
188 * Switch to usermode gs and return to 32-bit usermode using
189 * sysret. Used to return to 32-on-64 compat processes.
190 * Other usermode register state, including %esp, must already
191 * be restored.
192 */
193 void (*usergs_sysret32)(void);
194
195 /* Normal iret. Jump to this with the standard iret stack
196 frame set up. */
197 void (*iret)(void);
198
199 void (*swapgs)(void);
200
201 void (*start_context_switch)(struct task_struct *prev);
202 void (*end_context_switch)(struct task_struct *next);
203};
204
205struct pv_irq_ops {
206 void (*init_IRQ)(void);
207
208 /*
209 * Get/set interrupt state. save_fl and restore_fl are only
210 * expected to use X86_EFLAGS_IF; all other bits
211 * returned from save_fl are undefined, and may be ignored by
212 * restore_fl.
213 *
214 * NOTE: These functions callers expect the callee to preserve
215 * more registers than the standard C calling convention.
216 */
217 struct paravirt_callee_save save_fl;
218 struct paravirt_callee_save restore_fl;
219 struct paravirt_callee_save irq_disable;
220 struct paravirt_callee_save irq_enable;
221
222 void (*safe_halt)(void);
223 void (*halt)(void);
224
225#ifdef CONFIG_X86_64
226 void (*adjust_exception_frame)(void);
227#endif
228};
229
230struct pv_apic_ops {
231#ifdef CONFIG_X86_LOCAL_APIC
232 void (*setup_boot_clock)(void);
233 void (*setup_secondary_clock)(void);
234
235 void (*startup_ipi_hook)(int phys_apicid,
236 unsigned long start_eip,
237 unsigned long start_esp);
238#endif
239};
240
241struct pv_mmu_ops {
242 /*
243 * Called before/after init_mm pagetable setup. setup_start
244 * may reset %cr3, and may pre-install parts of the pagetable;
245 * pagetable setup is expected to preserve any existing
246 * mapping.
247 */
248 void (*pagetable_setup_start)(pgd_t *pgd_base);
249 void (*pagetable_setup_done)(pgd_t *pgd_base);
250
251 unsigned long (*read_cr2)(void);
252 void (*write_cr2)(unsigned long);
253
254 unsigned long (*read_cr3)(void);
255 void (*write_cr3)(unsigned long);
256
257 /*
258 * Hooks for intercepting the creation/use/destruction of an
259 * mm_struct.
260 */
261 void (*activate_mm)(struct mm_struct *prev,
262 struct mm_struct *next);
263 void (*dup_mmap)(struct mm_struct *oldmm,
264 struct mm_struct *mm);
265 void (*exit_mmap)(struct mm_struct *mm);
266
267
268 /* TLB operations */
269 void (*flush_tlb_user)(void);
270 void (*flush_tlb_kernel)(void);
271 void (*flush_tlb_single)(unsigned long addr);
272 void (*flush_tlb_others)(const struct cpumask *cpus,
273 struct mm_struct *mm,
274 unsigned long va);
275
276 /* Hooks for allocating and freeing a pagetable top-level */
277 int (*pgd_alloc)(struct mm_struct *mm);
278 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd);
279
280 /*
281 * Hooks for allocating/releasing pagetable pages when they're
282 * attached to a pagetable
283 */
284 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn);
285 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn);
286 void (*alloc_pmd_clone)(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count);
287 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn);
288 void (*release_pte)(unsigned long pfn);
289 void (*release_pmd)(unsigned long pfn);
290 void (*release_pud)(unsigned long pfn);
291
292 /* Pagetable manipulation functions */
293 void (*set_pte)(pte_t *ptep, pte_t pteval);
294 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
295 pte_t *ptep, pte_t pteval);
296 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
297 void (*pte_update)(struct mm_struct *mm, unsigned long addr,
298 pte_t *ptep);
299 void (*pte_update_defer)(struct mm_struct *mm,
300 unsigned long addr, pte_t *ptep);
301
302 pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr,
303 pte_t *ptep);
304 void (*ptep_modify_prot_commit)(struct mm_struct *mm, unsigned long addr,
305 pte_t *ptep, pte_t pte);
306
307 struct paravirt_callee_save pte_val;
308 struct paravirt_callee_save make_pte;
309
310 struct paravirt_callee_save pgd_val;
311 struct paravirt_callee_save make_pgd;
312
313#if PAGETABLE_LEVELS >= 3
314#ifdef CONFIG_X86_PAE
315 void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
316 void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
317 pte_t *ptep);
318 void (*pmd_clear)(pmd_t *pmdp);
319
320#endif /* CONFIG_X86_PAE */
321
322 void (*set_pud)(pud_t *pudp, pud_t pudval);
323
324 struct paravirt_callee_save pmd_val;
325 struct paravirt_callee_save make_pmd;
326
327#if PAGETABLE_LEVELS == 4
328 struct paravirt_callee_save pud_val;
329 struct paravirt_callee_save make_pud;
330
331 void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
332#endif /* PAGETABLE_LEVELS == 4 */
333#endif /* PAGETABLE_LEVELS >= 3 */
334
335#ifdef CONFIG_HIGHPTE
336 void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
337#endif
338
339 struct pv_lazy_ops lazy_mode;
340
341 /* dom0 ops */
342
343 /* Sometimes the physical address is a pfn, and sometimes its
344 an mfn. We can tell which is which from the index. */
345 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
346 phys_addr_t phys, pgprot_t flags);
347};
348
349struct raw_spinlock;
350struct pv_lock_ops {
351 int (*spin_is_locked)(struct raw_spinlock *lock);
352 int (*spin_is_contended)(struct raw_spinlock *lock);
353 void (*spin_lock)(struct raw_spinlock *lock);
354 void (*spin_lock_flags)(struct raw_spinlock *lock, unsigned long flags);
355 int (*spin_trylock)(struct raw_spinlock *lock);
356 void (*spin_unlock)(struct raw_spinlock *lock);
357};
358
359/* This contains all the paravirt structures: we get a convenient
360 * number for each function using the offset which we use to indicate
361 * what to patch. */
362struct paravirt_patch_template {
363 struct pv_init_ops pv_init_ops;
364 struct pv_time_ops pv_time_ops;
365 struct pv_cpu_ops pv_cpu_ops;
366 struct pv_irq_ops pv_irq_ops;
367 struct pv_apic_ops pv_apic_ops;
368 struct pv_mmu_ops pv_mmu_ops;
369 struct pv_lock_ops pv_lock_ops;
370};
371
372extern struct pv_info pv_info;
373extern struct pv_init_ops pv_init_ops;
374extern struct pv_time_ops pv_time_ops;
375extern struct pv_cpu_ops pv_cpu_ops;
376extern struct pv_irq_ops pv_irq_ops;
377extern struct pv_apic_ops pv_apic_ops;
378extern struct pv_mmu_ops pv_mmu_ops;
379extern struct pv_lock_ops pv_lock_ops;
380
381#define PARAVIRT_PATCH(x) \
382 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
383
384#define paravirt_type(op) \
385 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
386 [paravirt_opptr] "i" (&(op))
387#define paravirt_clobber(clobber) \
388 [paravirt_clobber] "i" (clobber)
389
390/*
391 * Generate some code, and mark it as patchable by the
392 * apply_paravirt() alternate instruction patcher.
393 */
394#define _paravirt_alt(insn_string, type, clobber) \
395 "771:\n\t" insn_string "\n" "772:\n" \
396 ".pushsection .parainstructions,\"a\"\n" \
397 _ASM_ALIGN "\n" \
398 _ASM_PTR " 771b\n" \
399 " .byte " type "\n" \
400 " .byte 772b-771b\n" \
401 " .short " clobber "\n" \
402 ".popsection\n"
403
404/* Generate patchable code, with the default asm parameters. */
405#define paravirt_alt(insn_string) \
406 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
407
408/* Simple instruction patching code. */
409#define DEF_NATIVE(ops, name, code) \
410 extern const char start_##ops##_##name[], end_##ops##_##name[]; \
411 asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
412
413unsigned paravirt_patch_nop(void);
414unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
415unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
416unsigned paravirt_patch_ignore(unsigned len);
417unsigned paravirt_patch_call(void *insnbuf,
418 const void *target, u16 tgt_clobbers,
419 unsigned long addr, u16 site_clobbers,
420 unsigned len);
421unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
422 unsigned long addr, unsigned len);
423unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
424 unsigned long addr, unsigned len);
425
426unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
427 const char *start, const char *end);
428
429unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
430 unsigned long addr, unsigned len);
431
432int paravirt_disable_iospace(void);
433
434/*
435 * This generates an indirect call based on the operation type number.
436 * The type number, computed in PARAVIRT_PATCH, is derived from the
437 * offset into the paravirt_patch_template structure, and can therefore be
438 * freely converted back into a structure offset.
439 */
440#define PARAVIRT_CALL "call *%c[paravirt_opptr];"
441
442/*
443 * These macros are intended to wrap calls through one of the paravirt
444 * ops structs, so that they can be later identified and patched at
445 * runtime.
446 *
447 * Normally, a call to a pv_op function is a simple indirect call:
448 * (pv_op_struct.operations)(args...).
449 *
450 * Unfortunately, this is a relatively slow operation for modern CPUs,
451 * because it cannot necessarily determine what the destination
452 * address is. In this case, the address is a runtime constant, so at
453 * the very least we can patch the call to e a simple direct call, or
454 * ideally, patch an inline implementation into the callsite. (Direct
455 * calls are essentially free, because the call and return addresses
456 * are completely predictable.)
457 *
458 * For i386, these macros rely on the standard gcc "regparm(3)" calling
459 * convention, in which the first three arguments are placed in %eax,
460 * %edx, %ecx (in that order), and the remaining arguments are placed
461 * on the stack. All caller-save registers (eax,edx,ecx) are expected
462 * to be modified (either clobbered or used for return values).
463 * X86_64, on the other hand, already specifies a register-based calling
464 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
465 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
466 * special handling for dealing with 4 arguments, unlike i386.
467 * However, x86_64 also have to clobber all caller saved registers, which
468 * unfortunately, are quite a bit (r8 - r11)
469 *
470 * The call instruction itself is marked by placing its start address
471 * and size into the .parainstructions section, so that
472 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
473 * appropriate patching under the control of the backend pv_init_ops
474 * implementation.
475 *
476 * Unfortunately there's no way to get gcc to generate the args setup
477 * for the call, and then allow the call itself to be generated by an
478 * inline asm. Because of this, we must do the complete arg setup and
479 * return value handling from within these macros. This is fairly
480 * cumbersome.
481 *
482 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
483 * It could be extended to more arguments, but there would be little
484 * to be gained from that. For each number of arguments, there are
485 * the two VCALL and CALL variants for void and non-void functions.
486 *
487 * When there is a return value, the invoker of the macro must specify
488 * the return type. The macro then uses sizeof() on that type to
489 * determine whether its a 32 or 64 bit value, and places the return
490 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
491 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
492 * the return value size.
493 *
494 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
495 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
496 * in low,high order
497 *
498 * Small structures are passed and returned in registers. The macro
499 * calling convention can't directly deal with this, so the wrapper
500 * functions must do this.
501 *
502 * These PVOP_* macros are only defined within this header. This
503 * means that all uses must be wrapped in inline functions. This also
504 * makes sure the incoming and outgoing types are always correct.
505 */
506#ifdef CONFIG_X86_32
507#define PVOP_VCALL_ARGS \
508 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx
509#define PVOP_CALL_ARGS PVOP_VCALL_ARGS
510
511#define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
512#define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
513#define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
514
515#define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
516 "=c" (__ecx)
517#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
518
519#define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
520#define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
521
522#define EXTRA_CLOBBERS
523#define VEXTRA_CLOBBERS
524#else /* CONFIG_X86_64 */
525#define PVOP_VCALL_ARGS \
526 unsigned long __edi = __edi, __esi = __esi, \
527 __edx = __edx, __ecx = __ecx
528#define PVOP_CALL_ARGS PVOP_VCALL_ARGS, __eax
529
530#define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
531#define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
532#define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
533#define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
534
535#define PVOP_VCALL_CLOBBERS "=D" (__edi), \
536 "=S" (__esi), "=d" (__edx), \
537 "=c" (__ecx)
538#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
539
540#define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
541#define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
542
543#define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
544#define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
545#endif /* CONFIG_X86_32 */
546
547#ifdef CONFIG_PARAVIRT_DEBUG
548#define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
549#else
550#define PVOP_TEST_NULL(op) ((void)op)
551#endif
552
553#define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \
554 pre, post, ...) \
555 ({ \
556 rettype __ret; \
557 PVOP_CALL_ARGS; \
558 PVOP_TEST_NULL(op); \
559 /* This is 32-bit specific, but is okay in 64-bit */ \
560 /* since this condition will never hold */ \
561 if (sizeof(rettype) > sizeof(unsigned long)) { \
562 asm volatile(pre \
563 paravirt_alt(PARAVIRT_CALL) \
564 post \
565 : call_clbr \
566 : paravirt_type(op), \
567 paravirt_clobber(clbr), \
568 ##__VA_ARGS__ \
569 : "memory", "cc" extra_clbr); \
570 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
571 } else { \
572 asm volatile(pre \
573 paravirt_alt(PARAVIRT_CALL) \
574 post \
575 : call_clbr \
576 : paravirt_type(op), \
577 paravirt_clobber(clbr), \
578 ##__VA_ARGS__ \
579 : "memory", "cc" extra_clbr); \
580 __ret = (rettype)__eax; \
581 } \
582 __ret; \
583 })
584
585#define __PVOP_CALL(rettype, op, pre, post, ...) \
586 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \
587 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__)
588
589#define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \
590 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
591 PVOP_CALLEE_CLOBBERS, , \
592 pre, post, ##__VA_ARGS__)
593
594
595#define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \
596 ({ \
597 PVOP_VCALL_ARGS; \
598 PVOP_TEST_NULL(op); \
599 asm volatile(pre \
600 paravirt_alt(PARAVIRT_CALL) \
601 post \
602 : call_clbr \
603 : paravirt_type(op), \
604 paravirt_clobber(clbr), \
605 ##__VA_ARGS__ \
606 : "memory", "cc" extra_clbr); \
607 })
608
609#define __PVOP_VCALL(op, pre, post, ...) \
610 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
611 VEXTRA_CLOBBERS, \
612 pre, post, ##__VA_ARGS__)
613
614#define __PVOP_VCALLEESAVE(rettype, op, pre, post, ...) \
615 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
616 PVOP_VCALLEE_CLOBBERS, , \
617 pre, post, ##__VA_ARGS__)
618
619
620
621#define PVOP_CALL0(rettype, op) \
622 __PVOP_CALL(rettype, op, "", "")
623#define PVOP_VCALL0(op) \
624 __PVOP_VCALL(op, "", "")
625
626#define PVOP_CALLEE0(rettype, op) \
627 __PVOP_CALLEESAVE(rettype, op, "", "")
628#define PVOP_VCALLEE0(op) \
629 __PVOP_VCALLEESAVE(op, "", "")
630
631
632#define PVOP_CALL1(rettype, op, arg1) \
633 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
634#define PVOP_VCALL1(op, arg1) \
635 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1))
636
637#define PVOP_CALLEE1(rettype, op, arg1) \
638 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
639#define PVOP_VCALLEE1(op, arg1) \
640 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1))
641
642
643#define PVOP_CALL2(rettype, op, arg1, arg2) \
644 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
645 PVOP_CALL_ARG2(arg2))
646#define PVOP_VCALL2(op, arg1, arg2) \
647 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
648 PVOP_CALL_ARG2(arg2))
649
650#define PVOP_CALLEE2(rettype, op, arg1, arg2) \
651 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
652 PVOP_CALL_ARG2(arg2))
653#define PVOP_VCALLEE2(op, arg1, arg2) \
654 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \
655 PVOP_CALL_ARG2(arg2))
656
657
658#define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
659 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
660 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
661#define PVOP_VCALL3(op, arg1, arg2, arg3) \
662 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
663 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
664
665/* This is the only difference in x86_64. We can make it much simpler */
666#ifdef CONFIG_X86_32
667#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
668 __PVOP_CALL(rettype, op, \
669 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
670 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
671 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4)))
672#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
673 __PVOP_VCALL(op, \
674 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
675 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
676 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
677#else
678#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
679 __PVOP_CALL(rettype, op, "", "", \
680 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
681 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
682#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
683 __PVOP_VCALL(op, "", "", \
684 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
685 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
686#endif
687
688/* Lazy mode for batching updates / context switch */
689enum paravirt_lazy_mode {
690 PARAVIRT_LAZY_NONE,
691 PARAVIRT_LAZY_MMU,
692 PARAVIRT_LAZY_CPU,
693};
694
695enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
696void paravirt_start_context_switch(struct task_struct *prev);
697void paravirt_end_context_switch(struct task_struct *next);
698
699void paravirt_enter_lazy_mmu(void);
700void paravirt_leave_lazy_mmu(void);
701
702void _paravirt_nop(void);
703u32 _paravirt_ident_32(u32);
704u64 _paravirt_ident_64(u64);
705
706#define paravirt_nop ((void *)_paravirt_nop)
707
708/* These all sit in the .parainstructions section to tell us what to patch. */
709struct paravirt_patch_site {
710 u8 *instr; /* original instructions */
711 u8 instrtype; /* type of this instruction */
712 u8 len; /* length of original instruction */
713 u16 clobbers; /* what registers you may clobber */
714};
715
716extern struct paravirt_patch_site __parainstructions[],
717 __parainstructions_end[];
718
719#endif /* __ASSEMBLY__ */
720
721#endif /* _ASM_X86_PARAVIRT_TYPES_H */
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index ac7e79654f3a..e08ea043e085 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -713,13 +713,23 @@ static inline void cpu_relax(void)
713 rep_nop(); 713 rep_nop();
714} 714}
715 715
716/* Stop speculative execution: */ 716/* Stop speculative execution and prefetching of modified code. */
717static inline void sync_core(void) 717static inline void sync_core(void)
718{ 718{
719 int tmp; 719 int tmp;
720 720
721 asm volatile("cpuid" : "=a" (tmp) : "0" (1) 721#if defined(CONFIG_M386) || defined(CONFIG_M486)
722 : "ebx", "ecx", "edx", "memory"); 722 if (boot_cpu_data.x86 < 5)
723 /* There is no speculative execution.
724 * jmp is a barrier to prefetching. */
725 asm volatile("jmp 1f\n1:\n" ::: "memory");
726 else
727#endif
728 /* cpuid is a barrier to speculative execution.
729 * Prefetched instructions are automatically
730 * invalidated when modified. */
731 asm volatile("cpuid" : "=a" (tmp) : "0" (1)
732 : "ebx", "ecx", "edx", "memory");
723} 733}
724 734
725static inline void __monitor(const void *eax, unsigned long ecx, 735static inline void __monitor(const void *eax, unsigned long ecx,
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 486935143e02..de7353c0ce9c 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -498,8 +498,8 @@ static void *__init_or_module text_poke_early(void *addr, const void *opcode,
498 unsigned long flags; 498 unsigned long flags;
499 local_irq_save(flags); 499 local_irq_save(flags);
500 memcpy(addr, opcode, len); 500 memcpy(addr, opcode, len);
501 local_irq_restore(flags);
502 sync_core(); 501 sync_core();
502 local_irq_restore(flags);
503 /* Could also do a CLFLUSH here to speed up CPU recovery; but 503 /* Could also do a CLFLUSH here to speed up CPU recovery; but
504 that causes hangs on some VIA CPUs. */ 504 that causes hangs on some VIA CPUs. */
505 return addr; 505 return addr;
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 83b217c7225f..22a47c82f3c0 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -253,6 +253,64 @@ static int __cpuinit nearby_node(int apicid)
253#endif 253#endif
254 254
255/* 255/*
256 * Fixup core topology information for AMD multi-node processors.
257 * Assumption 1: Number of cores in each internal node is the same.
258 * Assumption 2: Mixed systems with both single-node and dual-node
259 * processors are not supported.
260 */
261#ifdef CONFIG_X86_HT
262static void __cpuinit amd_fixup_dcm(struct cpuinfo_x86 *c)
263{
264#ifdef CONFIG_PCI
265 u32 t, cpn;
266 u8 n, n_id;
267 int cpu = smp_processor_id();
268
269 /* fixup topology information only once for a core */
270 if (cpu_has(c, X86_FEATURE_AMD_DCM))
271 return;
272
273 /* check for multi-node processor on boot cpu */
274 t = read_pci_config(0, 24, 3, 0xe8);
275 if (!(t & (1 << 29)))
276 return;
277
278 set_cpu_cap(c, X86_FEATURE_AMD_DCM);
279
280 /* cores per node: each internal node has half the number of cores */
281 cpn = c->x86_max_cores >> 1;
282
283 /* even-numbered NB_id of this dual-node processor */
284 n = c->phys_proc_id << 1;
285
286 /*
287 * determine internal node id and assign cores fifty-fifty to
288 * each node of the dual-node processor
289 */
290 t = read_pci_config(0, 24 + n, 3, 0xe8);
291 n = (t>>30) & 0x3;
292 if (n == 0) {
293 if (c->cpu_core_id < cpn)
294 n_id = 0;
295 else
296 n_id = 1;
297 } else {
298 if (c->cpu_core_id < cpn)
299 n_id = 1;
300 else
301 n_id = 0;
302 }
303
304 /* compute entire NodeID, use llc_shared_map to store sibling info */
305 per_cpu(cpu_llc_id, cpu) = (c->phys_proc_id << 1) + n_id;
306
307 /* fixup core id to be in range from 0 to cpn */
308 c->cpu_core_id = c->cpu_core_id % cpn;
309#endif
310}
311#endif
312
313/*
256 * On a AMD dual core setup the lower bits of the APIC id distingush the cores. 314 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
257 * Assumes number of cores is a power of two. 315 * Assumes number of cores is a power of two.
258 */ 316 */
@@ -269,6 +327,9 @@ static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c)
269 c->phys_proc_id = c->initial_apicid >> bits; 327 c->phys_proc_id = c->initial_apicid >> bits;
270 /* use socket ID also for last level cache */ 328 /* use socket ID also for last level cache */
271 per_cpu(cpu_llc_id, cpu) = c->phys_proc_id; 329 per_cpu(cpu_llc_id, cpu) = c->phys_proc_id;
330 /* fixup topology information on multi-node processors */
331 if ((c->x86 == 0x10) && (c->x86_model == 9))
332 amd_fixup_dcm(c);
272#endif 333#endif
273} 334}
274 335
@@ -277,9 +338,10 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
277#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64) 338#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
278 int cpu = smp_processor_id(); 339 int cpu = smp_processor_id();
279 int node; 340 int node;
280 unsigned apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid; 341 unsigned apicid = c->apicid;
342
343 node = per_cpu(cpu_llc_id, cpu);
281 344
282 node = c->phys_proc_id;
283 if (apicid_to_node[apicid] != NUMA_NO_NODE) 345 if (apicid_to_node[apicid] != NUMA_NO_NODE)
284 node = apicid_to_node[apicid]; 346 node = apicid_to_node[apicid];
285 if (!node_online(node)) { 347 if (!node_online(node)) {
@@ -406,12 +468,24 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
406 /* 468 /*
407 * Some BIOSes incorrectly force this feature, but only K8 469 * Some BIOSes incorrectly force this feature, but only K8
408 * revision D (model = 0x14) and later actually support it. 470 * revision D (model = 0x14) and later actually support it.
471 * (AMD Erratum #110, docId: 25759).
409 */ 472 */
410 if (c->x86_model < 0x14) 473 if (c->x86_model < 0x14 && cpu_has(c, X86_FEATURE_LAHF_LM)) {
474 u64 val;
475
411 clear_cpu_cap(c, X86_FEATURE_LAHF_LM); 476 clear_cpu_cap(c, X86_FEATURE_LAHF_LM);
477 if (!rdmsrl_amd_safe(0xc001100d, &val)) {
478 val &= ~(1ULL << 32);
479 wrmsrl_amd_safe(0xc001100d, val);
480 }
481 }
482
412 } 483 }
413 if (c->x86 == 0x10 || c->x86 == 0x11) 484 if (c->x86 == 0x10 || c->x86 == 0x11)
414 set_cpu_cap(c, X86_FEATURE_REP_GOOD); 485 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
486
487 /* get apicid instead of initial apic id from cpuid */
488 c->apicid = hard_smp_processor_id();
415#else 489#else
416 490
417 /* 491 /*
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 306bf0dca061..804c40e2bc3e 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -241,7 +241,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
241 case 0: 241 case 0:
242 if (!l1->val) 242 if (!l1->val)
243 return; 243 return;
244 assoc = l1->assoc; 244 assoc = assocs[l1->assoc];
245 line_size = l1->line_size; 245 line_size = l1->line_size;
246 lines_per_tag = l1->lines_per_tag; 246 lines_per_tag = l1->lines_per_tag;
247 size_in_kb = l1->size_in_kb; 247 size_in_kb = l1->size_in_kb;
@@ -249,7 +249,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
249 case 2: 249 case 2:
250 if (!l2.val) 250 if (!l2.val)
251 return; 251 return;
252 assoc = l2.assoc; 252 assoc = assocs[l2.assoc];
253 line_size = l2.line_size; 253 line_size = l2.line_size;
254 lines_per_tag = l2.lines_per_tag; 254 lines_per_tag = l2.lines_per_tag;
255 /* cpu_data has errata corrections for K7 applied */ 255 /* cpu_data has errata corrections for K7 applied */
@@ -258,10 +258,14 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
258 case 3: 258 case 3:
259 if (!l3.val) 259 if (!l3.val)
260 return; 260 return;
261 assoc = l3.assoc; 261 assoc = assocs[l3.assoc];
262 line_size = l3.line_size; 262 line_size = l3.line_size;
263 lines_per_tag = l3.lines_per_tag; 263 lines_per_tag = l3.lines_per_tag;
264 size_in_kb = l3.size_encoded * 512; 264 size_in_kb = l3.size_encoded * 512;
265 if (boot_cpu_has(X86_FEATURE_AMD_DCM)) {
266 size_in_kb = size_in_kb >> 1;
267 assoc = assoc >> 1;
268 }
265 break; 269 break;
266 default: 270 default:
267 return; 271 return;
@@ -270,18 +274,14 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
270 eax->split.is_self_initializing = 1; 274 eax->split.is_self_initializing = 1;
271 eax->split.type = types[leaf]; 275 eax->split.type = types[leaf];
272 eax->split.level = levels[leaf]; 276 eax->split.level = levels[leaf];
273 if (leaf == 3) 277 eax->split.num_threads_sharing = 0;
274 eax->split.num_threads_sharing =
275 current_cpu_data.x86_max_cores - 1;
276 else
277 eax->split.num_threads_sharing = 0;
278 eax->split.num_cores_on_die = current_cpu_data.x86_max_cores - 1; 278 eax->split.num_cores_on_die = current_cpu_data.x86_max_cores - 1;
279 279
280 280
281 if (assoc == 0xf) 281 if (assoc == 0xffff)
282 eax->split.is_fully_associative = 1; 282 eax->split.is_fully_associative = 1;
283 ebx->split.coherency_line_size = line_size - 1; 283 ebx->split.coherency_line_size = line_size - 1;
284 ebx->split.ways_of_associativity = assocs[assoc] - 1; 284 ebx->split.ways_of_associativity = assoc - 1;
285 ebx->split.physical_line_partition = lines_per_tag - 1; 285 ebx->split.physical_line_partition = lines_per_tag - 1;
286 ecx->split.number_of_sets = (size_in_kb * 1024) / line_size / 286 ecx->split.number_of_sets = (size_in_kb * 1024) / line_size /
287 (ebx->split.ways_of_associativity + 1) - 1; 287 (ebx->split.ways_of_associativity + 1) - 1;
@@ -523,6 +523,18 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
523 int index_msb, i; 523 int index_msb, i;
524 struct cpuinfo_x86 *c = &cpu_data(cpu); 524 struct cpuinfo_x86 *c = &cpu_data(cpu);
525 525
526 if ((index == 3) && (c->x86_vendor == X86_VENDOR_AMD)) {
527 struct cpuinfo_x86 *d;
528 for_each_online_cpu(i) {
529 if (!per_cpu(cpuid4_info, i))
530 continue;
531 d = &cpu_data(i);
532 this_leaf = CPUID4_INFO_IDX(i, index);
533 cpumask_copy(to_cpumask(this_leaf->shared_cpu_map),
534 d->llc_shared_map);
535 }
536 return;
537 }
526 this_leaf = CPUID4_INFO_IDX(cpu, index); 538 this_leaf = CPUID4_INFO_IDX(cpu, index);
527 num_threads_sharing = 1 + this_leaf->eax.split.num_threads_sharing; 539 num_threads_sharing = 1 + this_leaf->eax.split.num_threads_sharing;
528 540
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index ddae21620bda..1fecba404fd8 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -489,12 +489,14 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
489 int i, err = 0; 489 int i, err = 0;
490 struct threshold_bank *b = NULL; 490 struct threshold_bank *b = NULL;
491 char name[32]; 491 char name[32];
492 struct cpuinfo_x86 *c = &cpu_data(cpu);
493
492 494
493 sprintf(name, "threshold_bank%i", bank); 495 sprintf(name, "threshold_bank%i", bank);
494 496
495#ifdef CONFIG_SMP 497#ifdef CONFIG_SMP
496 if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */ 498 if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */
497 i = cpumask_first(cpu_core_mask(cpu)); 499 i = cpumask_first(c->llc_shared_map);
498 500
499 /* first core not up yet */ 501 /* first core not up yet */
500 if (cpu_data(i).cpu_core_id) 502 if (cpu_data(i).cpu_core_id)
@@ -514,7 +516,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
514 if (err) 516 if (err)
515 goto out; 517 goto out;
516 518
517 cpumask_copy(b->cpus, cpu_core_mask(cpu)); 519 cpumask_copy(b->cpus, c->llc_shared_map);
518 per_cpu(threshold_banks, cpu)[bank] = b; 520 per_cpu(threshold_banks, cpu)[bank] = b;
519 521
520 goto out; 522 goto out;
@@ -539,7 +541,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
539#ifndef CONFIG_SMP 541#ifndef CONFIG_SMP
540 cpumask_setall(b->cpus); 542 cpumask_setall(b->cpus);
541#else 543#else
542 cpumask_copy(b->cpus, cpu_core_mask(cpu)); 544 cpumask_copy(b->cpus, c->llc_shared_map);
543#endif 545#endif
544 546
545 per_cpu(threshold_banks, cpu)[bank] = b; 547 per_cpu(threshold_banks, cpu)[bank] = b;
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index 1e904346bbf4..62ac8cb6ba27 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -116,11 +116,9 @@ static int show_cpuinfo(struct seq_file *m, void *v)
116 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); 116 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
117#endif 117#endif
118 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size); 118 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
119#ifdef CONFIG_X86_64
120 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); 119 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
121 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", 120 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
122 c->x86_phys_bits, c->x86_virt_bits); 121 c->x86_phys_bits, c->x86_virt_bits);
123#endif
124 122
125 seq_printf(m, "power management:"); 123 seq_printf(m, "power management:");
126 for (i = 0; i < 32; i++) { 124 for (i = 0; i < 32; i++) {
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 98fd6cd4e3a4..7dd950094178 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -1,6 +1,7 @@
1/* ----------------------------------------------------------------------- * 1/* ----------------------------------------------------------------------- *
2 * 2 *
3 * Copyright 2000-2008 H. Peter Anvin - All Rights Reserved 3 * Copyright 2000-2008 H. Peter Anvin - All Rights Reserved
4 * Copyright 2009 Intel Corporation; author: H. Peter Anvin
4 * 5 *
5 * This program is free software; you can redistribute it and/or modify 6 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by 7 * it under the terms of the GNU General Public License as published by
@@ -80,11 +81,8 @@ static ssize_t msr_read(struct file *file, char __user *buf,
80 81
81 for (; count; count -= 8) { 82 for (; count; count -= 8) {
82 err = rdmsr_safe_on_cpu(cpu, reg, &data[0], &data[1]); 83 err = rdmsr_safe_on_cpu(cpu, reg, &data[0], &data[1]);
83 if (err) { 84 if (err)
84 if (err == -EFAULT) /* Fix idiotic error code */
85 err = -EIO;
86 break; 85 break;
87 }
88 if (copy_to_user(tmp, &data, 8)) { 86 if (copy_to_user(tmp, &data, 8)) {
89 err = -EFAULT; 87 err = -EFAULT;
90 break; 88 break;
@@ -115,11 +113,8 @@ static ssize_t msr_write(struct file *file, const char __user *buf,
115 break; 113 break;
116 } 114 }
117 err = wrmsr_safe_on_cpu(cpu, reg, data[0], data[1]); 115 err = wrmsr_safe_on_cpu(cpu, reg, data[0], data[1]);
118 if (err) { 116 if (err)
119 if (err == -EFAULT) /* Fix idiotic error code */
120 err = -EIO;
121 break; 117 break;
122 }
123 tmp += 2; 118 tmp += 2;
124 bytes += 8; 119 bytes += 8;
125 } 120 }
@@ -127,6 +122,54 @@ static ssize_t msr_write(struct file *file, const char __user *buf,
127 return bytes ? bytes : err; 122 return bytes ? bytes : err;
128} 123}
129 124
125static long msr_ioctl(struct file *file, unsigned int ioc, unsigned long arg)
126{
127 u32 __user *uregs = (u32 __user *)arg;
128 u32 regs[8];
129 int cpu = iminor(file->f_path.dentry->d_inode);
130 int err;
131
132 switch (ioc) {
133 case X86_IOC_RDMSR_REGS:
134 if (!(file->f_mode & FMODE_READ)) {
135 err = -EBADF;
136 break;
137 }
138 if (copy_from_user(&regs, uregs, sizeof regs)) {
139 err = -EFAULT;
140 break;
141 }
142 err = rdmsr_safe_regs_on_cpu(cpu, regs);
143 if (err)
144 break;
145 if (copy_to_user(uregs, &regs, sizeof regs))
146 err = -EFAULT;
147 break;
148
149 case X86_IOC_WRMSR_REGS:
150 if (!(file->f_mode & FMODE_WRITE)) {
151 err = -EBADF;
152 break;
153 }
154 if (copy_from_user(&regs, uregs, sizeof regs)) {
155 err = -EFAULT;
156 break;
157 }
158 err = wrmsr_safe_regs_on_cpu(cpu, regs);
159 if (err)
160 break;
161 if (copy_to_user(uregs, &regs, sizeof regs))
162 err = -EFAULT;
163 break;
164
165 default:
166 err = -ENOTTY;
167 break;
168 }
169
170 return err;
171}
172
130static int msr_open(struct inode *inode, struct file *file) 173static int msr_open(struct inode *inode, struct file *file)
131{ 174{
132 unsigned int cpu = iminor(file->f_path.dentry->d_inode); 175 unsigned int cpu = iminor(file->f_path.dentry->d_inode);
@@ -157,6 +200,8 @@ static const struct file_operations msr_fops = {
157 .read = msr_read, 200 .read = msr_read,
158 .write = msr_write, 201 .write = msr_write,
159 .open = msr_open, 202 .open = msr_open,
203 .unlocked_ioctl = msr_ioctl,
204 .compat_ioctl = msr_ioctl,
160}; 205};
161 206
162static int __cpuinit msr_device_create(int cpu) 207static int __cpuinit msr_device_create(int cpu)
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 70ec9b951d76..f5b0b4a01fb2 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -362,8 +362,9 @@ struct pv_cpu_ops pv_cpu_ops = {
362#endif 362#endif
363 .wbinvd = native_wbinvd, 363 .wbinvd = native_wbinvd,
364 .read_msr = native_read_msr_safe, 364 .read_msr = native_read_msr_safe,
365 .read_msr_amd = native_read_msr_amd_safe, 365 .rdmsr_regs = native_rdmsr_safe_regs,
366 .write_msr = native_write_msr_safe, 366 .write_msr = native_write_msr_safe,
367 .wrmsr_regs = native_wrmsr_safe_regs,
367 .read_tsc = native_read_tsc, 368 .read_tsc = native_read_tsc,
368 .read_pmc = native_read_pmc, 369 .read_pmc = native_read_pmc,
369 .read_tscp = native_read_tscp, 370 .read_tscp = native_read_tscp,
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 2fecda69ee64..c36cc1452cdc 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -434,7 +434,8 @@ const struct cpumask *cpu_coregroup_mask(int cpu)
434 * For perf, we return last level cache shared map. 434 * For perf, we return last level cache shared map.
435 * And for power savings, we return cpu_core_map 435 * And for power savings, we return cpu_core_map
436 */ 436 */
437 if (sched_mc_power_savings || sched_smt_power_savings) 437 if ((sched_mc_power_savings || sched_smt_power_savings) &&
438 !(cpu_has(c, X86_FEATURE_AMD_DCM)))
438 return cpu_core_mask(cpu); 439 return cpu_core_mask(cpu);
439 else 440 else
440 return c->llc_shared_map; 441 return c->llc_shared_map;
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 07c31899c9c2..9e609206fac9 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -9,6 +9,8 @@ lib-y += thunk_$(BITS).o
9lib-y += usercopy_$(BITS).o getuser.o putuser.o 9lib-y += usercopy_$(BITS).o getuser.o putuser.o
10lib-y += memcpy_$(BITS).o 10lib-y += memcpy_$(BITS).o
11 11
12obj-y += msr-reg.o msr-reg-export.o
13
12ifeq ($(CONFIG_X86_32),y) 14ifeq ($(CONFIG_X86_32),y)
13 obj-y += atomic64_32.o 15 obj-y += atomic64_32.o
14 lib-y += checksum_32.o 16 lib-y += checksum_32.o
diff --git a/arch/x86/lib/msr-reg-export.c b/arch/x86/lib/msr-reg-export.c
new file mode 100644
index 000000000000..a311cc59b65d
--- /dev/null
+++ b/arch/x86/lib/msr-reg-export.c
@@ -0,0 +1,5 @@
1#include <linux/module.h>
2#include <asm/msr.h>
3
4EXPORT_SYMBOL(native_rdmsr_safe_regs);
5EXPORT_SYMBOL(native_wrmsr_safe_regs);
diff --git a/arch/x86/lib/msr-reg.S b/arch/x86/lib/msr-reg.S
new file mode 100644
index 000000000000..69fa10623f21
--- /dev/null
+++ b/arch/x86/lib/msr-reg.S
@@ -0,0 +1,102 @@
1#include <linux/linkage.h>
2#include <linux/errno.h>
3#include <asm/dwarf2.h>
4#include <asm/asm.h>
5#include <asm/msr.h>
6
7#ifdef CONFIG_X86_64
8/*
9 * int native_{rdmsr,wrmsr}_safe_regs(u32 gprs[8]);
10 *
11 * reg layout: u32 gprs[eax, ecx, edx, ebx, esp, ebp, esi, edi]
12 *
13 */
14.macro op_safe_regs op
15ENTRY(native_\op\()_safe_regs)
16 CFI_STARTPROC
17 pushq_cfi %rbx
18 pushq_cfi %rbp
19 movq %rdi, %r10 /* Save pointer */
20 xorl %r11d, %r11d /* Return value */
21 movl (%rdi), %eax
22 movl 4(%rdi), %ecx
23 movl 8(%rdi), %edx
24 movl 12(%rdi), %ebx
25 movl 20(%rdi), %ebp
26 movl 24(%rdi), %esi
27 movl 28(%rdi), %edi
28 CFI_REMEMBER_STATE
291: \op
302: movl %eax, (%r10)
31 movl %r11d, %eax /* Return value */
32 movl %ecx, 4(%r10)
33 movl %edx, 8(%r10)
34 movl %ebx, 12(%r10)
35 movl %ebp, 20(%r10)
36 movl %esi, 24(%r10)
37 movl %edi, 28(%r10)
38 popq_cfi %rbp
39 popq_cfi %rbx
40 ret
413:
42 CFI_RESTORE_STATE
43 movl $-EIO, %r11d
44 jmp 2b
45
46 _ASM_EXTABLE(1b, 3b)
47 CFI_ENDPROC
48ENDPROC(native_\op\()_safe_regs)
49.endm
50
51#else /* X86_32 */
52
53.macro op_safe_regs op
54ENTRY(native_\op\()_safe_regs)
55 CFI_STARTPROC
56 pushl_cfi %ebx
57 pushl_cfi %ebp
58 pushl_cfi %esi
59 pushl_cfi %edi
60 pushl_cfi $0 /* Return value */
61 pushl_cfi %eax
62 movl 4(%eax), %ecx
63 movl 8(%eax), %edx
64 movl 12(%eax), %ebx
65 movl 20(%eax), %ebp
66 movl 24(%eax), %esi
67 movl 28(%eax), %edi
68 movl (%eax), %eax
69 CFI_REMEMBER_STATE
701: \op
712: pushl_cfi %eax
72 movl 4(%esp), %eax
73 popl_cfi (%eax)
74 addl $4, %esp
75 CFI_ADJUST_CFA_OFFSET -4
76 movl %ecx, 4(%eax)
77 movl %edx, 8(%eax)
78 movl %ebx, 12(%eax)
79 movl %ebp, 20(%eax)
80 movl %esi, 24(%eax)
81 movl %edi, 28(%eax)
82 popl_cfi %eax
83 popl_cfi %edi
84 popl_cfi %esi
85 popl_cfi %ebp
86 popl_cfi %ebx
87 ret
883:
89 CFI_RESTORE_STATE
90 movl $-EIO, 4(%esp)
91 jmp 2b
92
93 _ASM_EXTABLE(1b, 3b)
94 CFI_ENDPROC
95ENDPROC(native_\op\()_safe_regs)
96.endm
97
98#endif
99
100op_safe_regs rdmsr
101op_safe_regs wrmsr
102
diff --git a/arch/x86/lib/msr.c b/arch/x86/lib/msr.c
index caa24aca8115..33a1e3ca22d8 100644
--- a/arch/x86/lib/msr.c
+++ b/arch/x86/lib/msr.c
@@ -175,3 +175,52 @@ int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
175 return err ? err : rv.err; 175 return err ? err : rv.err;
176} 176}
177EXPORT_SYMBOL(wrmsr_safe_on_cpu); 177EXPORT_SYMBOL(wrmsr_safe_on_cpu);
178
179/*
180 * These variants are significantly slower, but allows control over
181 * the entire 32-bit GPR set.
182 */
183struct msr_regs_info {
184 u32 *regs;
185 int err;
186};
187
188static void __rdmsr_safe_regs_on_cpu(void *info)
189{
190 struct msr_regs_info *rv = info;
191
192 rv->err = rdmsr_safe_regs(rv->regs);
193}
194
195static void __wrmsr_safe_regs_on_cpu(void *info)
196{
197 struct msr_regs_info *rv = info;
198
199 rv->err = wrmsr_safe_regs(rv->regs);
200}
201
202int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
203{
204 int err;
205 struct msr_regs_info rv;
206
207 rv.regs = regs;
208 rv.err = -EIO;
209 err = smp_call_function_single(cpu, __rdmsr_safe_regs_on_cpu, &rv, 1);
210
211 return err ? err : rv.err;
212}
213EXPORT_SYMBOL(rdmsr_safe_regs_on_cpu);
214
215int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
216{
217 int err;
218 struct msr_regs_info rv;
219
220 rv.regs = regs;
221 rv.err = -EIO;
222 err = smp_call_function_single(cpu, __wrmsr_safe_regs_on_cpu, &rv, 1);
223
224 return err ? err : rv.err;
225}
226EXPORT_SYMBOL(wrmsr_safe_regs_on_cpu);
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index eb33aaa8415d..b62ccb840cfb 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -714,7 +714,7 @@ static int xen_write_msr_safe(unsigned int msr, unsigned low, unsigned high)
714 set: 714 set:
715 base = ((u64)high << 32) | low; 715 base = ((u64)high << 32) | low;
716 if (HYPERVISOR_set_segment_base(which, base) != 0) 716 if (HYPERVISOR_set_segment_base(which, base) != 0)
717 ret = -EFAULT; 717 ret = -EIO;
718 break; 718 break;
719#endif 719#endif
720 720
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 12:25:10 -0500