linux-kernel - [PATCH 07/14] KVM: VMX: Add missing VMENTRY controls to vmcs

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Date:   Mon, 27 Jun 2022 18:04:33 +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 07/14] KVM: VMX: Add missing VMENTRY controls to vmcs_config

As a preparation to reusing the result of setup_vmcs_config() in
nested VMX MSR setup, add the VMENTRY controls which KVM doesn't
use but supports for nVMX to KVM_OPT_VMX_VM_ENTRY_CONTROLS and
filter them out in vmx_vmentry_ctrl().

No functional change intended.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
---
 arch/x86/kvm/vmx/vmx.c | 3 +++
 arch/x86/kvm/vmx/vmx.h | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 15191b3e5538..3846a8c7102a 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4184,6 +4184,9 @@ static u32 vmx_vmentry_ctrl(void)
 {
 	u32 vmentry_ctrl = vmcs_config.vmentry_ctrl;
 
+	/* Not used by KVM but supported for nesting. */
+	vmentry_ctrl &= ~(VM_ENTRY_SMM | VM_ENTRY_DEACT_DUAL_MONITOR);
+
 	if (vmx_pt_mode_is_system())
 		vmentry_ctrl &= ~(VM_ENTRY_PT_CONCEAL_PIP |
 				  VM_ENTRY_LOAD_IA32_RTIT_CTL);
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 5e9127f39c19..6b44f4c1d45f 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -478,7 +478,9 @@ static inline u8 vmx_get_rvi(void)
 		__KVM_REQ_VMX_VM_ENTRY_CONTROLS
 #endif
 #define KVM_OPT_VMX_VM_ENTRY_CONTROLS				\
-	(VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL |			\
+	(VM_ENTRY_SMM |						\
+	VM_ENTRY_DEACT_DUAL_MONITOR |				\
+	VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL |			\
 	VM_ENTRY_LOAD_IA32_PAT |				\
 	VM_ENTRY_LOAD_IA32_EFER |				\
 	VM_ENTRY_LOAD_BNDCFGS |					\
-- 
2.35.3