diff mbox series

[RFC,2/2] kvm/x86: allow guest to toggle X86_CR4_FSGSBASE

Message ID 20200928083047.3349-2-jiangshanlai@gmail.com (mailing list archive)
State New, archived
Headers show
Series [RFC,1/2] kvm/x86: intercept guest changes to X86_CR4_LA57 | expand

Commit Message

Lai Jiangshan Sept. 28, 2020, 8:30 a.m. UTC 
From: Lai Jiangshan <laijs@linux.alibaba.com>

There is no reason to force VM-Exit on toggling
X86_CR4_FSGSBASE.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
 arch/x86/kvm/kvm_cache_regs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h
index ca0781b41df9..a889563ad02d 100644
--- a/arch/x86/kvm/kvm_cache_regs.h
+++ b/arch/x86/kvm/kvm_cache_regs.h
@@ -7,7 +7,7 @@ 
 #define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
 #define KVM_POSSIBLE_CR4_GUEST_BITS				  \
 	(X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR  \
-	 | X86_CR4_OSXMMEXCPT | X86_CR4_PGE | X86_CR4_TSD)
+	 | X86_CR4_OSXMMEXCPT | X86_CR4_PGE | X86_CR4_TSD | X86_CR4_FSGSBASE)
 
 #define BUILD_KVM_GPR_ACCESSORS(lname, uname)				      \
 static __always_inline unsigned long kvm_##lname##_read(struct kvm_vcpu *vcpu)\