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authorIngo Molnar <mingo@elte.hu>2008-10-15 13:46:29 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-15 13:46:29 +0200
commitb2aaf8f74cdc84a9182f6cabf198b7763bcb9d40 (patch)
tree53ccb1c2c14751fe69cf93102e76e97021f6df07 /arch/x86/kernel/reboot.c
parent4f962d4d65923d7b722192e729840cfb79af0a5a (diff)
parent278429cff8809958d25415ba0ed32b59866ab1a8 (diff)
Merge branch 'linus' into stackprotector
Conflicts: arch/x86/kernel/Makefile include/asm-x86/pda.h
Diffstat (limited to 'arch/x86/kernel/reboot.c')
-rw-r--r--arch/x86/kernel/reboot.c35
1 files changed, 23 insertions, 12 deletions
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index f6be7d5f82f..f4c93f1cfc1 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -27,9 +27,13 @@
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
-static long no_idt[3];
+static const struct desc_ptr no_idt = {};
static int reboot_mode;
-enum reboot_type reboot_type = BOOT_KBD;
+/*
+ * Keyboard reset and triple fault may result in INIT, not RESET, which
+ * doesn't work when we're in vmx root mode. Try ACPI first.
+ */
+enum reboot_type reboot_type = BOOT_ACPI;
int reboot_force;
#if defined(CONFIG_X86_32) && defined(CONFIG_SMP)
@@ -177,6 +181,14 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"),
},
},
+ { /* Handle problems with rebooting on Dell T5400's */
+ .callback = set_bios_reboot,
+ .ident = "Dell Precision T5400",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"),
+ },
+ },
{ /* Handle problems with rebooting on HP laptops */
.callback = set_bios_reboot,
.ident = "HP Compaq Laptop",
@@ -201,15 +213,15 @@ core_initcall(reboot_init);
controller to pulse the CPU reset line, which is more thorough, but
doesn't work with at least one type of 486 motherboard. It is easy
to stop this code working; hence the copious comments. */
-static unsigned long long
+static const unsigned long long
real_mode_gdt_entries [3] =
{
0x0000000000000000ULL, /* Null descriptor */
- 0x00009a000000ffffULL, /* 16-bit real-mode 64k code at 0x00000000 */
- 0x000092000100ffffULL /* 16-bit real-mode 64k data at 0x00000100 */
+ 0x00009b000000ffffULL, /* 16-bit real-mode 64k code at 0x00000000 */
+ 0x000093000100ffffULL /* 16-bit real-mode 64k data at 0x00000100 */
};
-static struct desc_ptr
+static const struct desc_ptr
real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
real_mode_idt = { 0x3ff, 0 };
@@ -231,7 +243,7 @@ real_mode_idt = { 0x3ff, 0 };
More could be done here to set up the registers as if a CPU reset had
occurred; hopefully real BIOSs don't assume much. */
-static unsigned char real_mode_switch [] =
+static const unsigned char real_mode_switch [] =
{
0x66, 0x0f, 0x20, 0xc0, /* movl %cr0,%eax */
0x66, 0x83, 0xe0, 0x11, /* andl $0x00000011,%eax */
@@ -245,7 +257,7 @@ static unsigned char real_mode_switch [] =
0x24, 0x10, /* f: andb $0x10,al */
0x66, 0x0f, 0x22, 0xc0 /* movl %eax,%cr0 */
};
-static unsigned char jump_to_bios [] =
+static const unsigned char jump_to_bios [] =
{
0xea, 0x00, 0x00, 0xff, 0xff /* ljmp $0xffff,$0x0000 */
};
@@ -255,7 +267,7 @@ static unsigned char jump_to_bios [] =
* specified by the code and length parameters.
* We assume that length will aways be less that 100!
*/
-void machine_real_restart(unsigned char *code, int length)
+void machine_real_restart(const unsigned char *code, int length)
{
local_irq_disable();
@@ -368,7 +380,7 @@ static void native_machine_emergency_restart(void)
}
case BOOT_TRIPLE:
- load_idt((const struct desc_ptr *)&no_idt);
+ load_idt(&no_idt);
__asm__ __volatile__("int3");
reboot_type = BOOT_KBD;
@@ -403,10 +415,9 @@ void native_machine_shutdown(void)
{
/* Stop the cpus and apics */
#ifdef CONFIG_SMP
- int reboot_cpu_id;
/* The boot cpu is always logical cpu 0 */
- reboot_cpu_id = 0;
+ int reboot_cpu_id = 0;
#ifdef CONFIG_X86_32
/* See if there has been given a command line override */