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From: Yang Weijiang <weijiang.yang@intel.com>
To: pbonzini@redhat.com, seanjc@google.com, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: Yang Weijiang <weijiang.yang@intel.com>
Subject: [PATCH] KVM: nVMX: Set X86_CR4_CET in cr4_fixed1_bits if CET IBT is enabled
Date: Thu, 25 Feb 2021 11:09:50 +0800	[thread overview]
Message-ID: <20210225030951.17099-1-weijiang.yang@intel.com> (raw)

CET SHSTK and IBT are independently controlled by kernel, set X86_CR4_CET
bit in cr4_fixed1_bits if either of them is enabled so that nested guest
can enjoy the feature.

Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 5856c5b81084..e92134ee081c 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7258,6 +7258,7 @@ static void nested_vmx_cr_fixed1_bits_update(struct kvm_vcpu *vcpu)
 	cr4_fixed1_update(X86_CR4_UMIP,       ecx, feature_bit(UMIP));
 	cr4_fixed1_update(X86_CR4_LA57,       ecx, feature_bit(LA57));
 	cr4_fixed1_update(X86_CR4_CET,	      ecx, feature_bit(SHSTK));
+	cr4_fixed1_update(X86_CR4_CET,	      edx, feature_bit(IBT));
 
 #undef cr4_fixed1_update
 }
-- 
2.26.2


             reply	other threads:[~2021-02-25  2:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-25  3:09 Yang Weijiang [this message]
2021-02-25  3:09 ` [PATCH v2] KVM: nVMX: Sync L2 guest CET states between L1/L2 Yang Weijiang
2021-03-01 17:46   ` Sean Christopherson
2021-03-02  9:05     ` Yang Weijiang
2021-03-02  9:33       ` Paolo Bonzini
2021-03-02 10:35     ` Vitaly Kuznetsov
2021-03-03  6:09       ` Yang Weijiang
2021-03-01 17:39 ` [PATCH] KVM: nVMX: Set X86_CR4_CET in cr4_fixed1_bits if CET IBT is enabled Sean Christopherson

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