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[v3,8/9] kvm: svm: Update svm_xsaves_supported

Message ID 20191021233027.21566-9-aaronlewis@google.com (mailing list archive)
State New, archived
Headers show
Series Add support for XSAVES to AMD and unify it with Intel | expand

Commit Message

Aaron Lewis Oct. 21, 2019, 11:30 p.m. UTC 
AMD CPUs now support XSAVES in a limited fashion (they require IA32_XSS
to be zero).

AMD has no equivalent of Intel's "Enable XSAVES/XRSTORS" VM-execution
control. Instead, XSAVES is always available to the guest when supported
on the host.

Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Change-Id: I40dc2c682eb0d38c2208d95d5eb7bbb6c47f6317
---
 arch/x86/kvm/svm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 36d1cfd45c60..dd8a6418d56c 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5965,7 +5965,7 @@  static bool svm_mpx_supported(void)
 
 static bool svm_xsaves_supported(void)
 {
-	return false;
+	return boot_cpu_has(X86_FEATURE_XSAVES);
 }
 
 static bool svm_umip_emulated(void)