33 files changed, 188 insertions, 135 deletions

diff --git a/arch/x86/Kbuild b/arch/x86/Kbuild
index 61b6d51866f8..3942f74c92d7 100644
--- a/arch/x86/Kbuild
+++ b/arch/x86/Kbuild
@@ -17,6 +17,4 @@ obj-$(CONFIG_IA32_EMULATION) += ia32/
 obj-y += platform/
 obj-y += net/
 
-ifeq ($(CONFIG_X86_64),y)
-obj-$(CONFIG_KEXEC) += purgatory/
-endif
+obj-$(CONFIG_KEXEC_FILE) += purgatory/
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index a11f27c4266a..e4b1f431c7ed 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -23,6 +23,7 @@ config X86
         def_bool y
         select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
         select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
+        select ARCH_HAS_FAST_MULTIPLIER
         select ARCH_MIGHT_HAVE_PC_PARPORT
         select ARCH_MIGHT_HAVE_PC_SERIO
         select HAVE_AOUT if X86_32
@@ -1597,9 +1598,6 @@ source kernel/Kconfig.hz
 
 config KEXEC
         bool "kexec system call"
-        select BUILD_BIN2C
-        select CRYPTO
-        select CRYPTO_SHA256
         ---help---
           kexec is a system call that implements the ability to shutdown your
           current kernel, and to start another kernel.  It is like a reboot
@@ -1614,9 +1612,22 @@ config KEXEC
           interface is strongly in flux, so no good recommendation can be
           made.
 
+config KEXEC_FILE
+        bool "kexec file based system call"
+        select BUILD_BIN2C
+        depends on KEXEC
+        depends on X86_64
+        depends on CRYPTO=y
+        depends on CRYPTO_SHA256=y
+        ---help---
+          This is new version of kexec system call. This system call is
+          file based and takes file descriptors as system call argument
+          for kernel and initramfs as opposed to list of segments as
+          accepted by previous system call.
+
 config KEXEC_VERIFY_SIG
         bool "Verify kernel signature during kexec_file_load() syscall"
-        depends on KEXEC
+        depends on KEXEC_FILE
         ---help---
           This option makes kernel signature verification mandatory for
           kexec_file_load() syscall. If kernel is signature can not be
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 7705b6f921ac..5692d6ac0f18 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -184,11 +184,8 @@ archheaders:
         $(Q)$(MAKE) $(build)=arch/x86/syscalls all
 
 archprepare:
-ifeq ($(CONFIG_KEXEC),y)
-# Build only for 64bit. No loaders for 32bit yet.
- ifeq ($(CONFIG_X86_64),y)
+ifeq ($(CONFIG_KEXEC_FILE),y)
         $(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
- endif
 endif
 
 ###
@@ -254,6 +251,7 @@ archclean:
         $(Q)rm -rf $(objtree)/arch/x86_64
         $(Q)$(MAKE) $(clean)=$(boot)
         $(Q)$(MAKE) $(clean)=arch/x86/tools
+        $(Q)$(MAKE) $(clean)=arch/x86/purgatory
 
 define archhelp
   echo  '* bzImage      - Compressed kernel image (arch/x86/boot/bzImage)'
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 20db5b3609de..704f58aa79cd 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -35,8 +35,7 @@ vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/aslr.o
 
 $(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone
 
-vmlinux-objs-$(CONFIG_EFI_STUB) += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o \
-        $(objtree)/drivers/firmware/efi/libstub/lib.a
+vmlinux-objs-$(CONFIG_EFI_STUB) += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o
 
 $(obj)/vmlinux: $(vmlinux-objs-y) FORCE
         $(call if_changed,ld)
diff --git a/arch/x86/boot/compressed/aslr.c b/arch/x86/boot/compressed/aslr.c
index 913c999b0045..7c68808edeb7 100644
--- a/arch/x86/boot/compressed/aslr.c
+++ b/arch/x86/boot/compressed/aslr.c
@@ -182,12 +182,27 @@ static void mem_avoid_init(unsigned long input, unsigned long input_size,
 static bool mem_avoid_overlap(struct mem_vector *img)
 {
         int i;
+        struct setup_data *ptr;
 
         for (i = 0; i < MEM_AVOID_MAX; i++) {
                 if (mem_overlaps(img, &mem_avoid[i]))
                         return true;
         }
 
+        /* Avoid all entries in the setup_data linked list. */
+        ptr = (struct setup_data *)(unsigned long)real_mode->hdr.setup_data;
+        while (ptr) {
+                struct mem_vector avoid;
+
+                avoid.start = (u64)ptr;
+                avoid.size = sizeof(*ptr) + ptr->len;
+
+                if (mem_overlaps(img, &avoid))
+                        return true;
+
+                ptr = (struct setup_data *)(unsigned long)ptr->next;
+        }
+
         return false;
 }
 
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index f277184e2ac1..de8eebd6f67c 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -19,7 +19,10 @@
 
 static efi_system_table_t *sys_table;
 
-struct efi_config *efi_early;
+static struct efi_config *efi_early;
+
+#define efi_call_early(f, ...)                                          \
+        efi_early->call(efi_early->f, __VA_ARGS__);
 
 #define BOOT_SERVICES(bits)                                             \
 static void setup_boot_services##bits(struct efi_config *c)             \
@@ -265,21 +268,25 @@ void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
 
                 offset = offsetof(typeof(*out), output_string);
                 output_string = efi_early->text_output + offset;
+                out = (typeof(out))(unsigned long)efi_early->text_output;
                 func = (u64 *)output_string;
 
-                efi_early->call(*func, efi_early->text_output, str);
+                efi_early->call(*func, out, str);
         } else {
                 struct efi_simple_text_output_protocol_32 *out;
                 u32 *func;
 
                 offset = offsetof(typeof(*out), output_string);
                 output_string = efi_early->text_output + offset;
+                out = (typeof(out))(unsigned long)efi_early->text_output;
                 func = (u32 *)output_string;
 
-                efi_early->call(*func, efi_early->text_output, str);
+                efi_early->call(*func, out, str);
         }
 }
 
+#include "../../../../drivers/firmware/efi/libstub/efi-stub-helper.c"
+
 static void find_bits(unsigned long mask, u8 *pos, u8 *size)
 {
         u8 first, len;
@@ -360,7 +367,7 @@ free_struct:
         return status;
 }
 
-static efi_status_t
+static void
 setup_efi_pci32(struct boot_params *params, void **pci_handle,
                 unsigned long size)
 {
@@ -403,8 +410,6 @@ setup_efi_pci32(struct boot_params *params, void **pci_handle,
                 data = (struct setup_data *)rom;
 
         }
-
-        return status;
 }
 
 static efi_status_t
@@ -463,7 +468,7 @@ free_struct:
 
 }
 
-static efi_status_t
+static void
 setup_efi_pci64(struct boot_params *params, void **pci_handle,
                 unsigned long size)
 {
@@ -506,11 +511,18 @@ setup_efi_pci64(struct boot_params *params, void **pci_handle,
                 data = (struct setup_data *)rom;
 
         }
-
-        return status;
 }
 
-static efi_status_t setup_efi_pci(struct boot_params *params)
+/*
+ * There's no way to return an informative status from this function,
+ * because any analysis (and printing of error messages) needs to be
+ * done directly at the EFI function call-site.
+ *
+ * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
+ * just didn't find any PCI devices, but there's no way to tell outside
+ * the context of the call.
+ */
+static void setup_efi_pci(struct boot_params *params)
 {
         efi_status_t status;
         void **pci_handle = NULL;
@@ -527,7 +539,7 @@ static efi_status_t setup_efi_pci(struct boot_params *params)
                                         size, (void **)&pci_handle);
 
                 if (status != EFI_SUCCESS)
-                        return status;
+                        return;
 
                 status = efi_call_early(locate_handle,
                                         EFI_LOCATE_BY_PROTOCOL, &pci_proto,
@@ -538,13 +550,12 @@ static efi_status_t setup_efi_pci(struct boot_params *params)
                 goto free_handle;
 
         if (efi_early->is64)
-                status = setup_efi_pci64(params, pci_handle, size);
+                setup_efi_pci64(params, pci_handle, size);
         else
-                status = setup_efi_pci32(params, pci_handle, size);
+                setup_efi_pci32(params, pci_handle, size);
 
 free_handle:
         efi_call_early(free_pool, pci_handle);
-        return status;
 }
 
 static void
@@ -1032,7 +1043,6 @@ struct boot_params *make_boot_params(struct efi_config *c)
         int i;
         unsigned long ramdisk_addr;
         unsigned long ramdisk_size;
-        unsigned long initrd_addr_max;
 
         efi_early = c;
         sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
@@ -1095,15 +1105,20 @@ struct boot_params *make_boot_params(struct efi_config *c)
 
         memset(sdt, 0, sizeof(*sdt));
 
-        if (hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)
-                initrd_addr_max = -1UL;
-        else
-                initrd_addr_max = hdr->initrd_addr_max;
-
         status = handle_cmdline_files(sys_table, image,
                                       (char *)(unsigned long)hdr->cmd_line_ptr,
-                                      "initrd=", initrd_addr_max,
+                                      "initrd=", hdr->initrd_addr_max,
                                       &ramdisk_addr, &ramdisk_size);
+
+        if (status != EFI_SUCCESS &&
+            hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {
+                efi_printk(sys_table, "Trying to load files to higher address\n");
+                status = handle_cmdline_files(sys_table, image,
+                                      (char *)(unsigned long)hdr->cmd_line_ptr,
+                                      "initrd=", -1UL,
+                                      &ramdisk_addr, &ramdisk_size);
+        }
+
         if (status != EFI_SUCCESS)
                 goto fail2;
         hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
@@ -1376,10 +1391,7 @@ struct boot_params *efi_main(struct efi_config *c,
 
         setup_graphics(boot_params);
 
-        status = setup_efi_pci(boot_params);
-        if (status != EFI_SUCCESS) {
-                efi_printk(sys_table, "setup_efi_pci() failed!\n");
-        }
+        setup_efi_pci(boot_params);
 
         status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
                                 sizeof(*gdt), (void **)&gdt);
diff --git a/arch/x86/boot/compressed/eboot.h b/arch/x86/boot/compressed/eboot.h
index d487e727f1ec..c88c31ecad12 100644
--- a/arch/x86/boot/compressed/eboot.h
+++ b/arch/x86/boot/compressed/eboot.h
@@ -103,4 +103,20 @@ struct efi_uga_draw_protocol {
         void *blt;
 };
 
+struct efi_config {
+        u64 image_handle;
+        u64 table;
+        u64 allocate_pool;
+        u64 allocate_pages;
+        u64 get_memory_map;
+        u64 free_pool;
+        u64 free_pages;
+        u64 locate_handle;
+        u64 handle_protocol;
+        u64 exit_boot_services;
+        u64 text_output;
+        efi_status_t (*call)(unsigned long, ...);
+        bool is64;
+} __packed;
+
 #endif /* BOOT_COMPRESSED_EBOOT_H */
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index 888950f29fd9..a7ccd57f19e4 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -481,7 +481,7 @@ static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
         crypto_inc(ctrblk, AES_BLOCK_SIZE);
 }
 
-#ifdef CONFIG_AS_AVX
+#if 0   /* temporary disabled due to failing crypto tests */
 static void aesni_ctr_enc_avx_tfm(struct crypto_aes_ctx *ctx, u8 *out,
                               const u8 *in, unsigned int len, u8 *iv)
 {
@@ -1522,7 +1522,7 @@ static int __init aesni_init(void)
                 aesni_gcm_dec_tfm = aesni_gcm_dec;
         }
         aesni_ctr_enc_tfm = aesni_ctr_enc;
-#ifdef CONFIG_AS_AVX
+#if 0   /* temporary disabled due to failing crypto tests */
         if (cpu_has_avx) {
                 /* optimize performance of ctr mode encryption transform */
                 aesni_ctr_enc_tfm = aesni_ctr_enc_avx_tfm;
diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h
index afcd35d331de..cfe3b954d5e4 100644
--- a/arch/x86/include/asm/bitops.h
+++ b/arch/x86/include/asm/bitops.h
@@ -497,8 +497,6 @@ static __always_inline int fls64(__u64 x)
 
 #include <asm-generic/bitops/sched.h>
 
-#define ARCH_HAS_FAST_MULTIPLIER 1
-
 #include <asm/arch_hweight.h>
 
 #include <asm-generic/bitops/const_hweight.h>
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 044a2fd3c5fe..0ec241ede5a2 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -159,30 +159,6 @@ static inline efi_status_t efi_thunk_set_virtual_address_map(
 }
 #endif /* CONFIG_EFI_MIXED */
 
-
-/* arch specific definitions used by the stub code */
-
-struct efi_config {
-        u64 image_handle;
-        u64 table;
-        u64 allocate_pool;
-        u64 allocate_pages;
-        u64 get_memory_map;
-        u64 free_pool;
-        u64 free_pages;
-        u64 locate_handle;
-        u64 handle_protocol;
-        u64 exit_boot_services;
-        u64 text_output;
-        efi_status_t (*call)(unsigned long, ...);
-        bool is64;
-} __packed;
-
-extern struct efi_config *efi_early;
-
-#define efi_call_early(f, ...)                                          \
-        efi_early->call(efi_early->f, __VA_ARGS__);
-
 extern bool efi_reboot_required(void);
 
 #else
diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
index b0910f97a3ea..ffb1733ac91f 100644
--- a/arch/x86/include/asm/fixmap.h
+++ b/arch/x86/include/asm/fixmap.h
@@ -106,14 +106,14 @@ enum fixed_addresses {
         __end_of_permanent_fixed_addresses,
 
         /*
-         * 256 temporary boot-time mappings, used by early_ioremap(),
+         * 512 temporary boot-time mappings, used by early_ioremap(),
          * before ioremap() is functional.
          *
-         * If necessary we round it up to the next 256 pages boundary so
+         * If necessary we round it up to the next 512 pages boundary so
          * that we can have a single pgd entry and a single pte table:
          */
 #define NR_FIX_BTMAPS           64
-#define FIX_BTMAPS_SLOTS        4
+#define FIX_BTMAPS_SLOTS        8
 #define TOTAL_FIX_BTMAPS        (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
         FIX_BTMAP_END =
          (__end_of_permanent_fixed_addresses ^
diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 0aeed5ca356e..1733ab49ac5e 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -227,6 +227,8 @@ static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned
 
 extern void io_apic_eoi(unsigned int apic, unsigned int vector);
 
+extern bool mp_should_keep_irq(struct device *dev);
+
 #else  /* !CONFIG_X86_IO_APIC */
 
 #define io_apic_assign_pci_irqs 0
@@ -237,6 +239,7 @@ static inline int mp_find_ioapic(u32 gsi) { return 0; }
 static inline u32 mp_pin_to_gsi(int ioapic, int pin) { return UINT_MAX; }
 static inline int mp_map_gsi_to_irq(u32 gsi, unsigned int flags) { return gsi; }
 static inline void mp_unmap_irq(int irq) { }
+static inline bool mp_should_keep_irq(struct device *dev) { return 1; }
 
 static inline int save_ioapic_entries(void)
 {
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 572460175ba5..7c492ed9087b 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -95,7 +95,7 @@ static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
 #define KVM_REFILL_PAGES 25
 #define KVM_MAX_CPUID_ENTRIES 80
 #define KVM_NR_FIXED_MTRR_REGION 88
-#define KVM_NR_VAR_MTRR 10
+#define KVM_NR_VAR_MTRR 8
 
 #define ASYNC_PF_PER_VCPU 64
 
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 0ec056012618..aa97a070f09f 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -131,8 +131,13 @@ static inline int pte_exec(pte_t pte)
 
 static inline int pte_special(pte_t pte)
 {
-        return (pte_flags(pte) & (_PAGE_PRESENT|_PAGE_SPECIAL)) ==
-                                 (_PAGE_PRESENT|_PAGE_SPECIAL);
+        /*
+         * See CONFIG_NUMA_BALANCING pte_numa in include/asm-generic/pgtable.h.
+         * On x86 we have _PAGE_BIT_NUMA == _PAGE_BIT_GLOBAL+1 ==
+         * __PAGE_BIT_SOFTW1 == _PAGE_BIT_SPECIAL.
+         */
+        return (pte_flags(pte) & _PAGE_SPECIAL) &&
+                (pte_flags(pte) & (_PAGE_PRESENT|_PAGE_PROTNONE));
 }
 
 static inline unsigned long pte_pfn(pte_t pte)
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index 5be9063545d2..3874693c0e53 100644
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -19,6 +19,7 @@ extern pud_t level3_ident_pgt[512];
 extern pmd_t level2_kernel_pgt[512];
 extern pmd_t level2_fixmap_pgt[512];
 extern pmd_t level2_ident_pgt[512];
+extern pte_t level1_fixmap_pgt[512];
 extern pgd_t init_level4_pgt[];
 
 #define swapper_pg_dir init_level4_pgt
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index b5ea75c4a4b4..ada2e2d6be3e 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -71,6 +71,7 @@ obj-$(CONFIG_FTRACE_SYSCALLS)	+= ftrace.o
 obj-$(CONFIG_X86_TSC)           += trace_clock.o
 obj-$(CONFIG_KEXEC)             += machine_kexec_$(BITS).o
 obj-$(CONFIG_KEXEC)             += relocate_kernel_$(BITS).o crash.o
+obj-$(CONFIG_KEXEC_FILE)        += kexec-bzimage64.o
 obj-$(CONFIG_CRASH_DUMP)        += crash_dump_$(BITS).o
 obj-y                           += kprobes/
 obj-$(CONFIG_MODULES)           += module.o
@@ -118,5 +119,4 @@ ifeq ($(CONFIG_X86_64),y)
 
         obj-$(CONFIG_PCI_MMCONFIG)      += mmconf-fam10h_64.o
         obj-y                           += vsmp_64.o
-        obj-$(CONFIG_KEXEC)             += kexec-bzimage64.o
 endif
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 29290f554e79..337ce5a9b15c 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1070,6 +1070,11 @@ static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin,
         }
 
         if (flags & IOAPIC_MAP_ALLOC) {
+                /* special handling for legacy IRQs */
+                if (irq < nr_legacy_irqs() && info->count == 1 &&
+                    mp_irqdomain_map(domain, irq, pin) != 0)
+                        irq = -1;
+
                 if (irq > 0)
                         info->count++;
                 else if (info->count == 0)
@@ -3896,7 +3901,15 @@ int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq,
                         info->polarity = 1;
                 }
                 info->node = NUMA_NO_NODE;
-                info->set = 1;
+
+                /*
+                 * setup_IO_APIC_irqs() programs all legacy IRQs with default
+                 * trigger and polarity attributes. Don't set the flag for that
+                 * case so the first legacy IRQ user could reprogram the pin
+                 * with real trigger and polarity attributes.
+                 */
+                if (virq >= nr_legacy_irqs() || info->count)
+                        info->set = 1;
         }
         set_io_apic_irq_attr(&attr, ioapic, hwirq, info->trigger,
                              info->polarity);
@@ -3946,6 +3959,18 @@ int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node)
         return ret;
 }
 
+bool mp_should_keep_irq(struct device *dev)
+{
+        if (dev->power.is_prepared)
+                return true;
+#ifdef  CONFIG_PM_RUNTIME
+        if (dev->power.runtime_status == RPM_SUSPENDING)
+                return true;
+#endif
+
+        return false;
+}
+
 /* Enable IOAPIC early just for system timer */
 void __init pre_init_apic_IRQ0(void)
 {
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 0553a34fa0df..a618fcd2c07d 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -182,8 +182,7 @@ void native_machine_crash_shutdown(struct pt_regs *regs)
         crash_save_cpu(regs, safe_smp_processor_id());
 }
 
-#ifdef CONFIG_X86_64
-
+#ifdef CONFIG_KEXEC_FILE
 static int get_nr_ram_ranges_callback(unsigned long start_pfn,
                                 unsigned long nr_pfn, void *arg)
 {
@@ -696,5 +695,4 @@ int crash_load_segments(struct kimage *image)
 
         return ret;
 }
-
-#endif /* CONFIG_X86_64 */
+#endif /* CONFIG_KEXEC_FILE */
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 47c410d99f5d..4b0e1dfa2226 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -683,7 +683,7 @@ END(syscall_badsys)
 sysenter_badsys:
         movl $-ENOSYS,%eax
         jmp sysenter_after_call
-END(syscall_badsys)
+END(sysenter_badsys)
         CFI_ENDPROC
 
 .macro FIXUP_ESPFIX_STACK
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index 1e6cff5814fa..44f1ed42fdf2 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -203,7 +203,7 @@ void __init native_init_IRQ(void)
                 set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]);
         }
 
-        if (!acpi_ioapic && !of_ioapic)
+        if (!acpi_ioapic && !of_ioapic && nr_legacy_irqs())
                 setup_irq(2, &irq2);
 
 #ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index f304773285ae..f1314d0bcf0a 100644
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -338,8 +338,10 @@ int arch_prepare_optimized_kprobe(struct optimized_kprobe *op)
          * a relative jump.
          */
         rel = (long)op->optinsn.insn - (long)op->kp.addr + RELATIVEJUMP_SIZE;
-        if (abs(rel) > 0x7fffffff)
+        if (abs(rel) > 0x7fffffff) {
+                __arch_remove_optimized_kprobe(op, 0);
                 return -ERANGE;
+        }
 
         buf = (u8 *)op->optinsn.insn;
 
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 8b04018e5d1f..485981059a40 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -25,9 +25,11 @@
 #include <asm/debugreg.h>
 #include <asm/kexec-bzimage64.h>
 
+#ifdef CONFIG_KEXEC_FILE
 static struct kexec_file_ops *kexec_file_loaders[] = {
                 &kexec_bzImage64_ops,
 };
+#endif
 
 static void free_transition_pgtable(struct kimage *image)
 {
@@ -178,6 +180,7 @@ static void load_segments(void)
                 );
 }
 
+#ifdef CONFIG_KEXEC_FILE
 /* Update purgatory as needed after various image segments have been prepared */
 static int arch_update_purgatory(struct kimage *image)
 {
@@ -209,6 +212,12 @@ static int arch_update_purgatory(struct kimage *image)
 
         return ret;
 }
+#else /* !CONFIG_KEXEC_FILE */
+static inline int arch_update_purgatory(struct kimage *image)
+{
+        return 0;
+}
+#endif /* CONFIG_KEXEC_FILE */
 
 int machine_kexec_prepare(struct kimage *image)
 {
@@ -329,6 +338,7 @@ void arch_crash_save_vmcoreinfo(void)
 
 /* arch-dependent functionality related to kexec file-based syscall */
 
+#ifdef CONFIG_KEXEC_FILE
 int arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
                                   unsigned long buf_len)
 {
@@ -522,3 +532,4 @@ overflow:
                (int)ELF64_R_TYPE(rel[i].r_info), value);
         return -ENOEXEC;
 }
+#endif /* CONFIG_KEXEC_FILE */
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 2d872e08fab9..42a2dca984b3 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1284,6 +1284,9 @@ static void remove_siblinginfo(int cpu)
 
         for_each_cpu(sibling, cpu_sibling_mask(cpu))
                 cpumask_clear_cpu(cpu, cpu_sibling_mask(sibling));
+        for_each_cpu(sibling, cpu_llc_shared_mask(cpu))
+                cpumask_clear_cpu(cpu, cpu_llc_shared_mask(sibling));
+        cpumask_clear(cpu_llc_shared_mask(cpu));
         cpumask_clear(cpu_sibling_mask(cpu));
         cpumask_clear(cpu_core_mask(cpu));
         c->phys_proc_id = 0;
diff --git a/arch/x86/kernel/time.c b/arch/x86/kernel/time.c
index bf7ef5ce29df..0fa29609b2c4 100644
--- a/arch/x86/kernel/time.c
+++ b/arch/x86/kernel/time.c
@@ -68,6 +68,8 @@ static struct irqaction irq0  = {
 
 void __init setup_default_timer_irq(void)
 {
+        if (!nr_legacy_irqs())
+                return;
         setup_irq(0, &irq0);
 }
 
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 56657b0bb3bb..03954f7900f5 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1491,9 +1491,6 @@ static int __load_segment_descriptor(struct x86_emulate_ctxt *ctxt,
                         goto exception;
                 break;
         case VCPU_SREG_CS:
-                if (in_task_switch && rpl != dpl)
-                        goto exception;
-
                 if (!(seg_desc.type & 8))
                         goto exception;
 
@@ -4394,8 +4391,11 @@ done_prefixes:
 
         ctxt->execute = opcode.u.execute;
 
+        if (unlikely(ctxt->ud) && likely(!(ctxt->d & EmulateOnUD)))
+                return EMULATION_FAILED;
+
         if (unlikely(ctxt->d &
-                     (NotImpl|EmulateOnUD|Stack|Op3264|Sse|Mmx|Intercept|CheckPerm))) {
+                     (NotImpl|Stack|Op3264|Sse|Mmx|Intercept|CheckPerm))) {
                 /*
                  * These are copied unconditionally here, and checked unconditionally
                  * in x86_emulate_insn.
@@ -4406,9 +4406,6 @@ done_prefixes:
                 if (ctxt->d & NotImpl)
                         return EMULATION_FAILED;
 
-                if (!(ctxt->d & EmulateOnUD) && ctxt->ud)
-                        return EMULATION_FAILED;
-
                 if (mode == X86EMUL_MODE_PROT64 && (ctxt->d & Stack))
                         ctxt->op_bytes = 8;
 
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index 167ffcac16ed..95a427e57887 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -48,7 +48,9 @@ enum address_markers_idx {
         LOW_KERNEL_NR,
         VMALLOC_START_NR,
         VMEMMAP_START_NR,
+# ifdef CONFIG_X86_ESPFIX64
         ESPFIX_START_NR,
+# endif
         HIGH_KERNEL_NR,
         MODULES_VADDR_NR,
         MODULES_END_NR,
@@ -71,7 +73,9 @@ static struct addr_marker address_markers[] = {
         { PAGE_OFFSET,          "Low Kernel Mapping" },
         { VMALLOC_START,        "vmalloc() Area" },
         { VMEMMAP_START,        "Vmemmap" },
+# ifdef CONFIG_X86_ESPFIX64
         { ESPFIX_BASE_ADDR,     "ESPfix Area", 16 },
+# endif
         { __START_KERNEL_map,   "High Kernel Mapping" },
         { MODULES_VADDR,        "Modules" },
         { MODULES_END,          "End Modules" },
diff --git a/arch/x86/mm/mmap.c b/arch/x86/mm/mmap.c
index 25e7e1372bb2..919b91205cd4 100644
--- a/arch/x86/mm/mmap.c
+++ b/arch/x86/mm/mmap.c
@@ -31,7 +31,7 @@
 #include <linux/sched.h>
 #include <asm/elf.h>
 
-struct __read_mostly va_alignment va_align = {
+struct va_alignment __read_mostly va_align = {
         .flags = -1,
 };
 
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 1fe33987de02..ee61c36d64f8 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -49,7 +49,13 @@ void leave_mm(int cpu)
         if (cpumask_test_cpu(cpu, mm_cpumask(active_mm))) {
                 cpumask_clear_cpu(cpu, mm_cpumask(active_mm));
                 load_cr3(swapper_pg_dir);
-                trace_tlb_flush(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL);
+                /*
+                 * This gets called in the idle path where RCU
+                 * functions differently.  Tracing normally
+                 * uses RCU, so we have to call the tracepoint
+                 * specially here.
+                 */
+                trace_tlb_flush_rcuidle(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL);
         }
 }
 EXPORT_SYMBOL_GPL(leave_mm);
@@ -174,7 +180,7 @@ void flush_tlb_current_task(void)
  *
  * This is in units of pages.
  */
-unsigned long tlb_single_page_flush_ceiling = 33;
+static unsigned long tlb_single_page_flush_ceiling __read_mostly = 33;
 
 void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
                                 unsigned long end, unsigned long vmflag)
diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index c61ea57d1ba1..9a2b7101ae8a 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -326,27 +326,6 @@ static void pci_fixup_video(struct pci_dev *pdev)
         struct pci_bus *bus;
         u16 config;
 
-        if (!vga_default_device()) {
-                resource_size_t start, end;
-                int i;
-
-                /* Does firmware framebuffer belong to us? */
-                for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
-                        if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
-                                continue;
-
-                        start = pci_resource_start(pdev, i);
-                        end  = pci_resource_end(pdev, i);
-
-                        if (!start || !end)
-                                continue;
-
-                        if (screen_info.lfb_base >= start &&
-                            (screen_info.lfb_base + screen_info.lfb_size) < end)
-                                vga_set_default_device(pdev);
-                }
-        }
-
         /* Is VGA routed to us? */
         bus = pdev->bus;
         while (bus) {
@@ -371,8 +350,7 @@ static void pci_fixup_video(struct pci_dev *pdev)
                 pci_read_config_word(pdev, PCI_COMMAND, &config);
                 if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
                         pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
-                        dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device\n");
-                        vga_set_default_device(pdev);
+                        dev_printk(KERN_DEBUG, &pdev->dev, "Video device with shadowed ROM\n");
                 }
         }
 }
diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c
index 3865116c51fb..b9958c364075 100644
--- a/arch/x86/pci/intel_mid_pci.c
+++ b/arch/x86/pci/intel_mid_pci.c
@@ -229,7 +229,7 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev)
 
 static void intel_mid_pci_irq_disable(struct pci_dev *dev)
 {
-        if (!dev->dev.power.is_prepared && dev->irq > 0)
+        if (!mp_should_keep_irq(&dev->dev) && dev->irq > 0)
                 mp_unmap_irq(dev->irq);
 }
 
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index bc1a2c341891..eb500c2592ad 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -1256,7 +1256,7 @@ static int pirq_enable_irq(struct pci_dev *dev)
 
 static void pirq_disable_irq(struct pci_dev *dev)
 {
-        if (io_apic_assign_pci_irqs && !dev->dev.power.is_prepared &&
+        if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) &&
             dev->irq) {
                 mp_unmap_irq(dev->irq);
                 dev->irq = 0;
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
index 7fde9ee438a4..899dd2454256 100644
--- a/arch/x86/purgatory/Makefile
+++ b/arch/x86/purgatory/Makefile
@@ -11,6 +11,7 @@ targets += purgatory.ro
 # sure how to relocate those. Like kexec-tools, use custom flags.
 
 KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -MD -Os -mcmodel=large
+KBUILD_CFLAGS += -m$(BITS)
 
 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
                 $(call if_changed,ld)
@@ -24,7 +25,4 @@ $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
         $(call if_changed,bin2c)
 
 
-# No loaders for 32bits yet.
-ifeq ($(CONFIG_X86_64),y)
- obj-$(CONFIG_KEXEC)            += kexec-purgatory.o
-endif
+obj-$(CONFIG_KEXEC_FILE)        += kexec-purgatory.o
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index e8a1201c3293..16fb0099b7f2 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1866,12 +1866,11 @@ static void __init check_pt_base(unsigned long *pt_base, unsigned long *pt_end,
  *
  * We can construct this by grafting the Xen provided pagetable into
  * head_64.S's preconstructed pagetables.  We copy the Xen L2's into
- * level2_ident_pgt, level2_kernel_pgt and level2_fixmap_pgt.  This
- * means that only the kernel has a physical mapping to start with -
- * but that's enough to get __va working.  We need to fill in the rest
- * of the physical mapping once some sort of allocator has been set
- * up.
- * NOTE: for PVH, the page tables are native.
+ * level2_ident_pgt, and level2_kernel_pgt.  This means that only the
+ * kernel has a physical mapping to start with - but that's enough to
+ * get __va working.  We need to fill in the rest of the physical
+ * mapping once some sort of allocator has been set up.  NOTE: for
+ * PVH, the page tables are native.
  */
 void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn)
 {
@@ -1902,8 +1901,11 @@ void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn)
                 /* L3_i[0] -> level2_ident_pgt */
                 convert_pfn_mfn(level3_ident_pgt);
                 /* L3_k[510] -> level2_kernel_pgt
-                 * L3_i[511] -> level2_fixmap_pgt */
+                 * L3_k[511] -> level2_fixmap_pgt */
                 convert_pfn_mfn(level3_kernel_pgt);
+
+                /* L3_k[511][506] -> level1_fixmap_pgt */
+                convert_pfn_mfn(level2_fixmap_pgt);
         }
         /* We get [511][511] and have Xen's version of level2_kernel_pgt */
         l3 = m2v(pgd[pgd_index(__START_KERNEL_map)].pgd);
@@ -1913,21 +1915,15 @@ void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn)
         addr[1] = (unsigned long)l3;
         addr[2] = (unsigned long)l2;
         /* Graft it onto L4[272][0]. Note that we creating an aliasing problem:
-         * Both L4[272][0] and L4[511][511] have entries that point to the same
+         * Both L4[272][0] and L4[511][510] have entries that point to the same
          * L2 (PMD) tables. Meaning that if you modify it in __va space
          * it will be also modified in the __ka space! (But if you just
          * modify the PMD table to point to other PTE's or none, then you
          * are OK - which is what cleanup_highmap does) */
         copy_page(level2_ident_pgt, l2);
-        /* Graft it onto L4[511][511] */
+        /* Graft it onto L4[511][510] */
         copy_page(level2_kernel_pgt, l2);
 
-        /* Get [511][510] and graft that in level2_fixmap_pgt */
-        l3 = m2v(pgd[pgd_index(__START_KERNEL_map + PMD_SIZE)].pgd);
-        l2 = m2v(l3[pud_index(__START_KERNEL_map + PMD_SIZE)].pud);
-        copy_page(level2_fixmap_pgt, l2);
-        /* Note that we don't do anything with level1_fixmap_pgt which
-         * we don't need. */
         if (!xen_feature(XENFEAT_auto_translated_physmap)) {
                 /* Make pagetable pieces RO */
                 set_page_prot(init_level4_pgt, PAGE_KERNEL_RO);
@@ -1937,6 +1933,7 @@ void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn)
                 set_page_prot(level2_ident_pgt, PAGE_KERNEL_RO);
                 set_page_prot(level2_kernel_pgt, PAGE_KERNEL_RO);
                 set_page_prot(level2_fixmap_pgt, PAGE_KERNEL_RO);
+                set_page_prot(level1_fixmap_pgt, PAGE_KERNEL_RO);
 
                 /* Pin down new L4 */
                 pin_pagetable_pfn(MMUEXT_PIN_L4_TABLE,