From: Lei Wang <lei4.wang@intel.com>
To: pbonzini@redhat.com, seanjc@google.com, vkuznets@redhat.com,
wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com
Cc: lei4.wang@intel.com, chenyi.qiang@intel.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] KVM: VMX: Read BNDCFGS if not from_vmentry
Date: Thu, 21 Apr 2022 02:13:31 -0700 [thread overview]
Message-ID: <20220421091331.11196-1-lei4.wang@intel.com> (raw)
In the migration case, if nested state is set after MSR state, the value
needs to come from the current MSR value.
Signed-off-by: Lei Wang <lei4.wang@intel.com>
Reported-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/vmx/nested.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index f18744f7ff82..58a1fa7defc9 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -3381,7 +3381,8 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
if (!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS))
vmx->nested.vmcs01_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL);
if (kvm_mpx_supported() &&
- !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))
+ (!from_vmentry ||
+ !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS)))
vmx->nested.vmcs01_guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS);
/*
--
2.25.1
next reply other threads:[~2022-04-21 9:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-21 9:13 Lei Wang [this message]
2022-05-19 17:59 ` [PATCH] KVM: VMX: Read BNDCFGS if not from_vmentry Sean Christopherson
2022-05-25 2:40 ` Wang, Lei
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