Commit e099f3eb authored by Xiaoyao Li's avatar Xiaoyao Li Committed by Paolo Bonzini

KVM: VMX: RTIT_CTL_BRANCH_EN has no dependency on other CPUID bit

Per Intel SDM, RTIT_CTL_BRANCH_EN bit has no dependency on any CPUID
leaf 0x14.
Signed-off-by: default avatarXiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20210827070249.924633-5-xiaoyao.li@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent f4d3a902
......@@ -7136,7 +7136,8 @@ static void update_intel_pt_cfg(struct kvm_vcpu *vcpu)
/* Initialize and clear the no dependency bits */
vmx->pt_desc.ctl_bitmask = ~(RTIT_CTL_TRACEEN | RTIT_CTL_OS |
RTIT_CTL_USR | RTIT_CTL_TSC_EN | RTIT_CTL_DISRETC);
RTIT_CTL_USR | RTIT_CTL_TSC_EN | RTIT_CTL_DISRETC |
RTIT_CTL_BRANCH_EN);
/*
* If CPUID.(EAX=14H,ECX=0):EBX[0]=1 CR3Filter can be set otherwise
......@@ -7154,12 +7155,11 @@ static void update_intel_pt_cfg(struct kvm_vcpu *vcpu)
RTIT_CTL_CYC_THRESH | RTIT_CTL_PSB_FREQ);
/*
* If CPUID.(EAX=14H,ECX=0):EBX[3]=1 MTCEn BranchEn and
* MTCFreq can be set
* If CPUID.(EAX=14H,ECX=0):EBX[3]=1 MTCEn and MTCFreq can be set
*/
if (intel_pt_validate_cap(vmx->pt_desc.caps, PT_CAP_mtc))
vmx->pt_desc.ctl_bitmask &= ~(RTIT_CTL_MTC_EN |
RTIT_CTL_BRANCH_EN | RTIT_CTL_MTC_RANGE);
RTIT_CTL_MTC_RANGE);
/* If CPUID.(EAX=14H,ECX=0):EBX[4]=1 FUPonPTW and PTWEn can be set */
if (intel_pt_validate_cap(vmx->pt_desc.caps, PT_CAP_ptwrite))
......
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