Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Don't use the EFI reboot method by default
  x86, suspend: Restore MISC_ENABLE MSR in realmode wakeup
  x86, reboot: Acer Aspire One A110 reboot quirk
  x86-32, NUMA: Fix boot regression caused by NUMA init unification on highmem machines

diff --git a/arch/x86/include/asm/mmzone_32.h b/arch/x86/include/asm/mmzone_32.h
index 224e8c5..ffa037f 100644 (file)
--- a/arch/x86/include/asm/mmzone_32.h
+++ b/arch/x86/include/asm/mmzone_32.h
@@ -57,6 +57,8 @@ static inline int pfn_valid(int pfn)
        return 0;
 }
 
+#define early_pfn_valid(pfn)   pfn_valid((pfn))
+
 #endif /* CONFIG_DISCONTIGMEM */
 
 #ifdef CONFIG_NEED_MULTIPLE_NODES

diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S
index ead21b6..b4fd836 100644 (file)
--- a/arch/x86/kernel/acpi/realmode/wakeup.S
+++ b/arch/x86/kernel/acpi/realmode/wakeup.S
@@ -28,6 +28,8 @@ pmode_cr3:    .long   0       /* Saved %cr3 */
 pmode_cr4:     .long   0       /* Saved %cr4 */
 pmode_efer:    .quad   0       /* Saved EFER */
 pmode_gdt:     .quad   0
+pmode_misc_en: .quad   0       /* Saved MISC_ENABLE MSR */
+pmode_behavior:        .long   0       /* Wakeup behavior flags */
 realmode_flags:        .long   0
 real_magic:    .long   0
 trampoline_segment:    .word 0
@@ -91,6 +93,18 @@ wakeup_code:
        /* Call the C code */
        calll   main
 
+       /* Restore MISC_ENABLE before entering protected mode, in case
+          BIOS decided to clear XD_DISABLE during S3. */
+       movl    pmode_behavior, %eax
+       btl     $WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE, %eax
+       jnc     1f
+
+       movl    pmode_misc_en, %eax
+       movl    pmode_misc_en + 4, %edx
+       movl    $MSR_IA32_MISC_ENABLE, %ecx
+       wrmsr
+1:
+
        /* Do any other stuff... */
 
 #ifndef CONFIG_64BIT

diff --git a/arch/x86/kernel/acpi/realmode/wakeup.h b/arch/x86/kernel/acpi/realmode/wakeup.h
index e1828c0..97a29e1 100644 (file)
--- a/arch/x86/kernel/acpi/realmode/wakeup.h
+++ b/arch/x86/kernel/acpi/realmode/wakeup.h
@@ -21,6 +21,9 @@ struct wakeup_header {
        u32 pmode_efer_low;     /* Protected mode EFER */
        u32 pmode_efer_high;
        u64 pmode_gdt;
+       u32 pmode_misc_en_low;  /* Protected mode MISC_ENABLE */
+       u32 pmode_misc_en_high;
+       u32 pmode_behavior;     /* Wakeup routine behavior flags */
        u32 realmode_flags;
        u32 real_magic;
        u16 trampoline_segment; /* segment with trampoline code, 64-bit only */
@@ -39,4 +42,7 @@ extern struct wakeup_header wakeup_header;
 #define WAKEUP_HEADER_SIGNATURE 0x51ee1111
 #define WAKEUP_END_SIGNATURE   0x65a22c82
 
+/* Wakeup behavior bits */
+#define WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE     0
+
 #endif /* ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H */

diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 18a857b..103b6ab 100644 (file)
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -77,6 +77,12 @@ int acpi_suspend_lowlevel(void)
 
        header->pmode_cr0 = read_cr0();
        header->pmode_cr4 = read_cr4_safe();
+       header->pmode_behavior = 0;
+       if (!rdmsr_safe(MSR_IA32_MISC_ENABLE,
+                       &header->pmode_misc_en_low,
+                       &header->pmode_misc_en_high))
+               header->pmode_behavior |=
+                       (1 << WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE);
        header->realmode_flags = acpi_realmode_flags;
        header->real_magic = 0x12345678;
 

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 0c016f7..4f0d46f 100644 (file)
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -294,6 +294,14 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
                        DMI_MATCH(DMI_BOARD_NAME, "VersaLogic Menlow board"),
                },
        },
+       { /* Handle reboot issue on Acer Aspire one */
+               .callback = set_bios_reboot,
+               .ident = "Acer Aspire One A110",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
+               },
+       },
        { }
 };
 

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 474356b..899e393 100644 (file)
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -504,9 +504,6 @@ void __init efi_init(void)
        x86_platform.set_wallclock = efi_set_rtc_mmss;
 #endif
 
-       /* Setup for EFI runtime service */
-       reboot_type = BOOT_EFI;
-
 #if EFI_DEBUG
        print_efi_memmap();
 #endif