Commit 83b8e28b authored by Suresh Siddha's avatar Suresh Siddha Committed by H. Peter Anvin
Browse files

x86: xsave: restore xcr0 during resume 



Add the missing XCR0(XFEATURE_ENABLED_MASK) restore during resume.

Reported-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent f65bc214

arch/x86/power/cpu_32.c

+7 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/suspend.h>

#include <asm/mtrr.h>

#include <asm/mce.h>

#include <asm/xcr.h>



static struct saved_context saved_context;
@@ -124,6 +125,12 @@ static void __restore_processor_state(struct saved_context *ctxt) 
	if (boot_cpu_has(X86_FEATURE_SEP))

		enable_sep_cpu();



	/*

	 * restore XCR0 for xsave capable cpu's.

	 */

	if (cpu_has_xsave)

		xsetbv(XCR_XFEATURE_ENABLED_MASK, pcntxt_mask);



	fix_processor_context();

	do_fpu_end();

	mtrr_ap_init();

arch/x86/power/cpu_64.c

+7 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <asm/page.h>

#include <asm/pgtable.h>

#include <asm/mtrr.h>

#include <asm/xcr.h>



static void fix_processor_context(void);
@@ -122,6 +123,12 @@ static void __restore_processor_state(struct saved_context *ctxt) 
	wrmsrl(MSR_GS_BASE, ctxt->gs_base);

	wrmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);



	/*

	 * restore XCR0 for xsave capable cpu's.

	 */

	if (cpu_has_xsave)

		xsetbv(XCR_XFEATURE_ENABLED_MASK, pcntxt_mask);



	fix_processor_context();



	do_fpu_end();