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From:   Vitaly Kuznetsov <vkuznets@redhat.com>
To:     kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <seanjc@google.com>
Cc:     Anirudh Rayabharam <anrayabh@linux.microsoft.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Maxim Levitsky <mlevitsk@redhat.com>,
        linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 13/28] KVM: VMX: Get rid of eVMCS specific VMX controls sanitization
Date:   Wed, 29 Jun 2022 17:06:10 +0200
Message-Id: <20220629150625.238286-14-vkuznets@redhat.com>
In-Reply-To: <20220629150625.238286-1-vkuznets@redhat.com>
References: <20220629150625.238286-1-vkuznets@redhat.com>
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With the updated eVMCSv1 definition, there's no known 'problematic'
controls which are exposed in VMX control MSRs but are not present in
eVMCSv1. Get rid of the filtering.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/x86/kvm/vmx/evmcs.c | 13 -------------
 arch/x86/kvm/vmx/evmcs.h |  1 -
 arch/x86/kvm/vmx/vmx.c   |  5 -----
 3 files changed, 19 deletions(-)

diff --git a/arch/x86/kvm/vmx/evmcs.c b/arch/x86/kvm/vmx/evmcs.c
index 697590cf5b10..ed29bc9bc485 100644
--- a/arch/x86/kvm/vmx/evmcs.c
+++ b/arch/x86/kvm/vmx/evmcs.c
@@ -320,19 +320,6 @@ const struct evmcs_field vmcs_field_to_evmcs_1[] = {
 };
 const unsigned int nr_evmcs_1_fields = ARRAY_SIZE(vmcs_field_to_evmcs_1);
 
-#if IS_ENABLED(CONFIG_HYPERV)
-__init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
-{
-	vmcs_conf->cpu_based_exec_ctrl &= ~EVMCS1_UNSUPPORTED_EXEC_CTRL;
-	vmcs_conf->pin_based_exec_ctrl &= ~EVMCS1_UNSUPPORTED_PINCTRL;
-	vmcs_conf->cpu_based_2nd_exec_ctrl &= ~EVMCS1_UNSUPPORTED_2NDEXEC;
-	vmcs_conf->cpu_based_3rd_exec_ctrl = 0;
-
-	vmcs_conf->vmexit_ctrl &= ~EVMCS1_UNSUPPORTED_VMEXIT_CTRL;
-	vmcs_conf->vmentry_ctrl &= ~EVMCS1_UNSUPPORTED_VMENTRY_CTRL;
-}
-#endif
-
 bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa)
 {
 	struct hv_vp_assist_page assist_page;
diff --git a/arch/x86/kvm/vmx/evmcs.h b/arch/x86/kvm/vmx/evmcs.h
index c9090ac39740..36a311bb80a9 100644
--- a/arch/x86/kvm/vmx/evmcs.h
+++ b/arch/x86/kvm/vmx/evmcs.h
@@ -218,7 +218,6 @@ static inline void evmcs_load(u64 phys_addr)
 	vp_ap->enlighten_vmentry = 1;
 }
 
-__init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
 #else /* !IS_ENABLED(CONFIG_HYPERV) */
 static __always_inline void evmcs_write64(unsigned long field, u64 value) {}
 static inline void evmcs_write32(unsigned long field, u32 value) {}
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 99cd017cd3fe..83feb70d44a9 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2689,11 +2689,6 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf,
 	vmcs_conf->vmexit_ctrl         = _vmexit_control;
 	vmcs_conf->vmentry_ctrl        = _vmentry_control;
 
-#if IS_ENABLED(CONFIG_HYPERV)
-	if (enlightened_vmcs)
-		evmcs_sanitize_exec_ctrls(vmcs_conf);
-#endif
-
 	return 0;
 }
 
-- 
2.35.3