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Message-Id: <20220627160440.31857-15-vkuznets@redhat.com>
Date: Mon, 27 Jun 2022 18:04:40 +0200
From: Vitaly Kuznetsov <vkuznets@...hat.com>
To: kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
Sean Christopherson <seanjc@...gle.com>
Cc: Anirudh Rayabharam <anrayabh@...ux.microsoft.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Maxim Levitsky <mlevitsk@...hat.com>,
linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 14/14] KVM: nVMX: Use cached host MSR_IA32_VMX_MISC value for setting up nested MSR
vmcs_config has cased host MSR_IA32_VMX_MISC value, use it for setting
up nested MSR_IA32_VMX_MISC in nested_vmx_setup_ctls_msrs() and avoid the
redundant rdmsr().
No (real) functional change intended.
Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
---
arch/x86/kvm/vmx/nested.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index c88a9c6b4606..a35b28261d31 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -6723,10 +6723,7 @@ void nested_vmx_setup_ctls_msrs(struct vmcs_config *vmcs_conf, u32 ept_caps)
msrs->secondary_ctls_high |= SECONDARY_EXEC_ENCLS_EXITING;
/* miscellaneous data */
- rdmsr(MSR_IA32_VMX_MISC,
- msrs->misc_low,
- msrs->misc_high);
- msrs->misc_low &= VMX_MISC_SAVE_EFER_LMA;
+ msrs->misc_low = (u32)vmcs_conf->misc & VMX_MISC_SAVE_EFER_LMA;
msrs->misc_low |=
MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS |
VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE |
--
2.35.3
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