diff mbox series

[v3,51/57] KVM: x86: Drop superfluous host XSAVE check when adjusting guest XSAVES caps

Message ID 20241128013424.4096668-52-seanjc@google.com (mailing list archive)
State New
Headers show
Series KVM: x86: CPUID overhaul, fixes, and caching | expand

Commit Message

Sean Christopherson Nov. 28, 2024, 1:34 a.m. UTC 
Drop the manual boot_cpu_has() checks on XSAVE when adjusting the guest's
XSAVES capabilities now that guest cpu_caps incorporates KVM's support.
The guest's cpu_caps are initialized from kvm_cpu_caps, which are in turn
initialized from boot_cpu_data, i.e. checking guest_cpu_cap_has() also
checks host/KVM capabilities (which is the entire point of cpu_caps).

Cc: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/svm/svm.c | 1 -
 arch/x86/kvm/vmx/vmx.c | 3 +--
 2 files changed, 1 insertion(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 734b3ca40311..07911ddf1efe 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4402,7 +4402,6 @@  static void svm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
 	 * the guest read/write access to the host's XSS.
 	 */
 	guest_cpu_cap_change(vcpu, X86_FEATURE_XSAVES,
-			     boot_cpu_has(X86_FEATURE_XSAVE) &&
 			     boot_cpu_has(X86_FEATURE_XSAVES) &&
 			     guest_cpu_cap_has(vcpu, X86_FEATURE_XSAVE));
 
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 6e5edaa2ba3a..cf872d8691b5 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7825,8 +7825,7 @@  void vmx_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
 	 * to the guest.  XSAVES depends on CR4.OSXSAVE, and CR4.OSXSAVE can be
 	 * set if and only if XSAVE is supported.
 	 */
-	if (!boot_cpu_has(X86_FEATURE_XSAVE) ||
-	    !guest_cpu_cap_has(vcpu, X86_FEATURE_XSAVE))
+	if (!guest_cpu_cap_has(vcpu, X86_FEATURE_XSAVE))
 		guest_cpu_cap_clear(vcpu, X86_FEATURE_XSAVES);
 
 	vmx_setup_uret_msrs(vmx);