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Peter Anvin" Subject: [RFC PATCH 2/2] kvm/x86: allow guest to toggle X86_CR4_FSGSBASE Date: Mon, 28 Sep 2020 16:30:47 +0800 Message-Id: <20200928083047.3349-2-jiangshanlai@gmail.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20200928083047.3349-1-jiangshanlai@gmail.com> References: <20200928083047.3349-1-jiangshanlai@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lai Jiangshan There is no reason to force VM-Exit on toggling X86_CR4_FSGSBASE. Cc: Paolo Bonzini Signed-off-by: Lai Jiangshan --- arch/x86/kvm/kvm_cache_regs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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)\ -- 2.19.1.6.gb485710b