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authorLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 08:41:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 08:41:21 -0700
commit1e2f5b598aa56c3978c2e623f72e9656a565c6c9 (patch)
tree31b3a7555ac7c1d9a856adc0436ed9943c9cab36 /arch/x86/power/cpu.c
parentf9b3bcfbc43ac80f2019a5093ad9a1e624e611b1 (diff)
parent4d681be3c33dd74efffbe2a8f70634f7128602ec (diff)
downloadop-kernel-dev-1e2f5b598aa56c3978c2e623f72e9656a565c6c9.zip
op-kernel-dev-1e2f5b598aa56c3978c2e623f72e9656a565c6c9.tar.gz
Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 paravirt update from Ingo Molnar: "Various paravirtualization related changes - the biggest one makes guest support optional via CONFIG_HYPERVISOR_GUEST" * 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, wakeup, sleep: Use pvops functions for changing GDT entries x86, xen, gdt: Remove the pvops variant of store_gdt. x86-32, gdt: Store/load GDT for ACPI S3 or hibernation/resume path is not needed x86-64, gdt: Store/load GDT for ACPI S3 or hibernate/resume path is not needed. x86: Make Linux guest support optional x86, Kconfig: Move PARAVIRT_DEBUG into the paravirt menu
Diffstat (limited to 'arch/x86/power/cpu.c')
-rw-r--r--arch/x86/power/cpu.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/x86/power/cpu.c b/arch/x86/power/cpu.c
index 3c68768..6d6e907 100644
--- a/arch/x86/power/cpu.c
+++ b/arch/x86/power/cpu.c
@@ -62,11 +62,9 @@ static void __save_processor_state(struct saved_context *ctxt)
* descriptor tables
*/
#ifdef CONFIG_X86_32
- store_gdt(&ctxt->gdt);
store_idt(&ctxt->idt);
#else
/* CONFIG_X86_64 */
- store_gdt((struct desc_ptr *)&ctxt->gdt_limit);
store_idt((struct desc_ptr *)&ctxt->idt_limit);
#endif
store_tr(ctxt->tr);
@@ -135,7 +133,10 @@ static void fix_processor_context(void)
{
int cpu = smp_processor_id();
struct tss_struct *t = &per_cpu(init_tss, cpu);
-
+#ifdef CONFIG_X86_64
+ struct desc_struct *desc = get_cpu_gdt_table(cpu);
+ tss_desc tss;
+#endif
set_tss_desc(cpu, t); /*
* This just modifies memory; should not be
* necessary. But... This is necessary, because
@@ -144,7 +145,9 @@ static void fix_processor_context(void)
*/
#ifdef CONFIG_X86_64
- get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
+ memcpy(&tss, &desc[GDT_ENTRY_TSS], sizeof(tss_desc));
+ tss.type = 0x9; /* The available 64-bit TSS (see AMD vol 2, pg 91 */
+ write_gdt_entry(desc, GDT_ENTRY_TSS, &tss, DESC_TSS);
syscall_init(); /* This sets MSR_*STAR and related */
#endif
@@ -183,11 +186,9 @@ static void __restore_processor_state(struct saved_context *ctxt)
* ltr is done i fix_processor_context().
*/
#ifdef CONFIG_X86_32
- load_gdt(&ctxt->gdt);
load_idt(&ctxt->idt);
#else
/* CONFIG_X86_64 */
- load_gdt((const struct desc_ptr *)&ctxt->gdt_limit);
load_idt((const struct desc_ptr *)&ctxt->idt_limit);
#endif
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