[PATCH v4 3/3] kvm: x86: Enable Intel XSAVES for guest

From: Wanpeng Li
Date: Tue Dec 02 2014 - 20:02:36 EST


Expose intel xsaves feature to guest.

Signed-off-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxxxxxx>
---
arch/x86/kvm/cpuid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index a4f5ac4..0d919bc 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -267,6 +267,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
unsigned f_invpcid = kvm_x86_ops->invpcid_supported() ? F(INVPCID) : 0;
unsigned f_mpx = kvm_x86_ops->mpx_supported() ? F(MPX) : 0;
+ unsigned f_xsaves = kvm_x86_ops->xsaves_supported() ? F(XSAVES) : 0;

/* cpuid 1.edx */
const u32 kvm_supported_word0_x86_features =
@@ -322,7 +323,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,

/* cpuid 0xD.1.eax */
const u32 kvm_supported_word10_x86_features =
- F(XSAVEOPT) | F(XSAVEC) | F(XGETBV1);
+ F(XSAVEOPT) | F(XSAVEC) | F(XGETBV1) | f_xsaves;

/* all calls to cpuid_count() should be made on the same cpu */
get_cpu();
--
1.9.1

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