linux-kernel - [PATCH] KVM: VMX: Fix a TSX_CTRL_CPUID

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Date:   Mon,  6 Sep 2021 09:43:23 +0800
From:   Zhenzhong Duan <zhenzhong.duan@...el.com>
To:     kvm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, pbonzini@...hat.com,
        vkuznets@...hat.com, wanpengli@...cent.com, jmattson@...gle.com,
        joro@...tes.org, Zhenzhong Duan <zhenzhong.duan@...el.com>
Subject: [PATCH] KVM: VMX: Fix a TSX_CTRL_CPUID_CLEAR field mask issue

Host value of TSX_CTRL_CPUID_CLEAR field should be unchangable by guest,
but the mask for this purpose is set to a wrong value. So it doesn't
take effect.

Fixes: 8ea8b8d6f869 ("KVM: VMX: Use common x86's uret MSR list as the one true list")
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...el.com>
---
 arch/x86/kvm/vmx/vmx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 927a552393b9..36588b5feee6 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6812,7 +6812,7 @@ static int vmx_create_vcpu(struct kvm_vcpu *vcpu)
 		 */
 		tsx_ctrl = vmx_find_uret_msr(vmx, MSR_IA32_TSX_CTRL);
 		if (tsx_ctrl)
-			vmx->guest_uret_msrs[i].mask = ~(u64)TSX_CTRL_CPUID_CLEAR;
+			tsx_ctrl->mask = ~(u64)TSX_CTRL_CPUID_CLEAR;
 	}
 
 	err = alloc_loaded_vmcs(&vmx->vmcs01);
-- 
2.25.1