This patch fixes register saving so that each register is only
saved once, and adds missing saving of %cr8 on x86-64. Some reordering
so that save/restore is more logical/safer (segment registers should be
restored after gdt).
Signed-off-by: Pavel Machek <[email protected]>
---
commit 1f9ca1262e6b27dde44d456a87c456d15f0a9b80
tree de65e7579ed050d324357e3040b37c561676ab7d
parent e8108c98dd6d65613fa0ec9d2300f89c48d554bf
author <pavel@amd.(none)> 1114677870 +0200
committer <pavel@amd.(none)> 1114677870 +0200
Index: arch/i386/power/cpu.c
===================================================================
--- 3608de2fc88b062070a9d197eda9cac1fb9635d3/arch/i386/power/cpu.c (mode:100644 sha1:cf337c673d92a23d2d3ed339ec6e3065998a0a5e)
+++ de65e7579ed050d324357e3040b37c561676ab7d/arch/i386/power/cpu.c (mode:100644 sha1:3e7e54b402a6ad11bbace158ab5d399a4efd149b)
@@ -44,7 +44,6 @@
*/
asm volatile ("sgdt %0" : "=m" (ctxt->gdt_limit));
asm volatile ("sidt %0" : "=m" (ctxt->idt_limit));
- asm volatile ("sldt %0" : "=m" (ctxt->ldt));
asm volatile ("str %0" : "=m" (ctxt->tr));
/*
@@ -107,7 +106,6 @@
void __restore_processor_state(struct saved_context *ctxt)
{
-
/*
* control registers
*/
@@ -117,6 +115,13 @@
asm volatile ("movl %0, %%cr0" :: "r" (ctxt->cr0));
/*
+ * now restore the descriptor tables to their proper values
+ * ltr is done i fix_processor_context().
+ */
+ asm volatile ("lgdt %0" :: "m" (ctxt->gdt_limit));
+ asm volatile ("lidt %0" :: "m" (ctxt->idt_limit));
+
+ /*
* segment registers
*/
asm volatile ("movw %0, %%es" :: "r" (ctxt->es));
@@ -125,14 +130,6 @@
asm volatile ("movw %0, %%ss" :: "r" (ctxt->ss));
/*
- * now restore the descriptor tables to their proper values
- * ltr is done i fix_processor_context().
- */
- asm volatile ("lgdt %0" :: "m" (ctxt->gdt_limit));
- asm volatile ("lidt %0" :: "m" (ctxt->idt_limit));
- asm volatile ("lldt %0" :: "m" (ctxt->ldt));
-
- /*
* sysenter MSRs
*/
if (boot_cpu_has(X86_FEATURE_SEP))
Index: arch/x86_64/kernel/suspend.c
===================================================================
--- 3608de2fc88b062070a9d197eda9cac1fb9635d3/arch/x86_64/kernel/suspend.c (mode:100644 sha1:ebaa1e37d6579b7e0912e093fc1daa4fc186646d)
+++ de65e7579ed050d324357e3040b37c561676ab7d/arch/x86_64/kernel/suspend.c (mode:100644 sha1:6c0f402e3a889c9b7234a6ed8de80b259bd12a38)
@@ -44,7 +44,6 @@
*/
asm volatile ("sgdt %0" : "=m" (ctxt->gdt_limit));
asm volatile ("sidt %0" : "=m" (ctxt->idt_limit));
- asm volatile ("sldt %0" : "=m" (ctxt->ldt));
asm volatile ("str %0" : "=m" (ctxt->tr));
/* XMM0..XMM15 should be handled by kernel_fpu_begin(). */
@@ -69,6 +68,7 @@
asm volatile ("movq %%cr2, %0" : "=r" (ctxt->cr2));
asm volatile ("movq %%cr3, %0" : "=r" (ctxt->cr3));
asm volatile ("movq %%cr4, %0" : "=r" (ctxt->cr4));
+ asm volatile ("movq %%cr8, %0" : "=r" (ctxt->cr8));
}
void save_processor_state(void)
@@ -90,12 +90,20 @@
/*
* control registers
*/
+ asm volatile ("movq %0, %%cr8" :: "r" (ctxt->cr8));
asm volatile ("movq %0, %%cr4" :: "r" (ctxt->cr4));
asm volatile ("movq %0, %%cr3" :: "r" (ctxt->cr3));
asm volatile ("movq %0, %%cr2" :: "r" (ctxt->cr2));
asm volatile ("movq %0, %%cr0" :: "r" (ctxt->cr0));
/*
+ * now restore the descriptor tables to their proper values
+ * ltr is done i fix_processor_context().
+ */
+ asm volatile ("lgdt %0" :: "m" (ctxt->gdt_limit));
+ asm volatile ("lidt %0" :: "m" (ctxt->idt_limit));
+
+ /*
* segment registers
*/
asm volatile ("movw %0, %%ds" :: "r" (ctxt->ds));
@@ -108,14 +116,6 @@
wrmsrl(MSR_GS_BASE, ctxt->gs_base);
wrmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
- /*
- * now restore the descriptor tables to their proper values
- * ltr is done i fix_processor_context().
- */
- asm volatile ("lgdt %0" :: "m" (ctxt->gdt_limit));
- asm volatile ("lidt %0" :: "m" (ctxt->idt_limit));
- asm volatile ("lldt %0" :: "m" (ctxt->ldt));
-
fix_processor_context();
do_fpu_end();
Index: include/asm-x86_64/suspend.h
===================================================================
--- 3608de2fc88b062070a9d197eda9cac1fb9635d3/include/asm-x86_64/suspend.h (mode:100644 sha1:ec745807feae4892ec7d560e9fc930ca04591acb)
+++ de65e7579ed050d324357e3040b37c561676ab7d/include/asm-x86_64/suspend.h (mode:100644 sha1:bb9f40597d097dacf7e08ae8de2cc23dfbb2adab)
@@ -16,7 +16,7 @@
struct saved_context {
u16 ds, es, fs, gs, ss;
unsigned long gs_base, gs_kernel_base, fs_base;
- unsigned long cr0, cr2, cr3, cr4;
+ unsigned long cr0, cr2, cr3, cr4, cr8;
u16 gdt_pad;
u16 gdt_limit;
unsigned long gdt_base;
!-------------------------------------------------------------flip-
--
Boycott Kodak -- for their patent abuse against Java.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
