--- a/xen/arch/x86/acpi/suspend.c
+++ b/xen/arch/x86/acpi/suspend.c
@@ -13,12 +13,14 @@
#include <asm/hvm/hvm.h>
#include <asm/hvm/support.h>
#include <asm/i387.h>
+#include <asm/xstate.h>
#include <xen/hypercall.h>
static unsigned long saved_lstar, saved_cstar;
static unsigned long saved_sysenter_esp, saved_sysenter_eip;
static unsigned long saved_fs_base, saved_gs_base, saved_kernel_gs_base;
static uint16_t saved_segs[4];
+static uint64_t saved_xcr0;
void save_rest_processor_state(void)
{
@@ -38,6 +40,8 @@ void save_rest_processor_state(void)
rdmsrl(MSR_IA32_SYSENTER_ESP, saved_sysenter_esp);
rdmsrl(MSR_IA32_SYSENTER_EIP, saved_sysenter_eip);
}
+ if ( cpu_has_xsave )
+ saved_xcr0 = get_xcr0();
}
@@ -77,6 +81,9 @@ void restore_rest_processor_state(void)
do_set_segment_base(SEGBASE_GS_USER_SEL, saved_segs[3]);
}
+ if ( cpu_has_xsave && !set_xcr0(saved_xcr0) )
+ BUG();
+
/* Maybe load the debug registers. */
BUG_ON(is_hvm_vcpu(curr));
if ( !is_idle_vcpu(curr) && curr->arch.debugreg[7] )
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