From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 10/10] KVM: VMX: Fold __vmx_flush_tlb() into vmx_flush_tlb()
Date: Thu, 20 Feb 2020 12:43:56 -0800 [thread overview]
Message-ID: <20200220204356.8837-11-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20200220204356.8837-1-sean.j.christopherson@intel.com>
Fold __vmx_flush_tlb() into its sole caller, vmx_flush_tlb(), now that
all call sites that previously bounced through __vmx_flush_tlb() to
force the INVVPID path instead call vpid_sync_context() directly.
Opportunistically add a comment to explain why INVEPT is necessary when
EPT is enabled, even if VPID is disabled.
No functional change intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/kvm/vmx/vmx.h | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 6e0ca57cc41c..6204fa5897bb 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -501,23 +501,25 @@ static inline struct vmcs *alloc_vmcs(bool shadow)
u64 construct_eptp(struct kvm_vcpu *vcpu, unsigned long root_hpa);
-static inline void __vmx_flush_tlb(struct kvm_vcpu *vcpu, int vpid)
+static inline void vmx_flush_tlb(struct kvm_vcpu *vcpu)
{
+ /*
+ * INVEPT must be issued when EPT is enabled, irrespective of VPID, as
+ * the CPU is not required to invalidate GPA->HPA mappings on VM-Entry,
+ * even if VPID is disabled. GPA->HPA mappings are associated with the
+ * root EPT structure and not any particular VPID (INVVPID is also not
+ * required to invalidate GPA->HPA mappings).
+ */
if (enable_ept) {
if (!VALID_PAGE(vcpu->arch.mmu->root_hpa))
return;
ept_sync_context(construct_eptp(vcpu,
vcpu->arch.mmu->root_hpa));
} else {
- vpid_sync_context(vpid);
+ vpid_sync_context(to_vmx(vcpu)->vpid);
}
}
-static inline void vmx_flush_tlb(struct kvm_vcpu *vcpu)
-{
- __vmx_flush_tlb(vcpu, to_vmx(vcpu)->vpid);
-}
-
static inline void decache_tsc_multiplier(struct vcpu_vmx *vmx)
{
vmx->current_tsc_ratio = vmx->vcpu.arch.tsc_scaling_ratio;
--
2.24.1
next prev parent reply other threads:[~2020-02-20 20:44 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-20 20:43 [PATCH 00/10] KVM: x86: Clean up VMX's TLB flushing code Sean Christopherson
2020-02-20 20:43 ` [PATCH 01/10] KVM: VMX: Use vpid_sync_context() directly when possible Sean Christopherson
2020-02-21 13:17 ` Vitaly Kuznetsov
2020-02-21 15:36 ` Sean Christopherson
2020-02-21 17:26 ` Paolo Bonzini
2020-02-20 20:43 ` [PATCH 02/10] KVM: VMX: Move vpid_sync_vcpu_addr() down a few lines Sean Christopherson
2020-02-21 13:19 ` Vitaly Kuznetsov
2020-02-20 20:43 ` [PATCH 03/10] KVM: VMX: Handle INVVPID fallback logic in vpid_sync_vcpu_addr() Sean Christopherson
2020-02-21 13:26 ` Vitaly Kuznetsov
2020-02-20 20:43 ` [PATCH 04/10] KVM: VMX: Fold vpid_sync_vcpu_{single,global}() into vpid_sync_context() Sean Christopherson
2020-02-21 13:39 ` Vitaly Kuznetsov
2020-02-21 15:32 ` Sean Christopherson
2020-02-21 17:28 ` Paolo Bonzini
2020-02-20 20:43 ` [PATCH 05/10] KVM: nVMX: Use vpid_sync_vcpu_addr() to emulate INVVPID with address Sean Christopherson
2020-02-21 13:43 ` Vitaly Kuznetsov
2020-02-20 20:43 ` [PATCH 06/10] KVM: x86: Move "flush guest's TLB" logic to separate kvm_x86_ops hook Sean Christopherson
[not found] ` <87tv3krqta.fsf@vitty.brq.redhat.com>
2020-02-21 17:31 ` Paolo Bonzini
2020-02-21 17:32 ` Paolo Bonzini
2020-02-20 20:43 ` [PATCH 07/10] KVM: VMX: Clean up vmx_flush_tlb_gva() Sean Christopherson
2020-02-21 13:54 ` Vitaly Kuznetsov
2020-02-20 20:43 ` [PATCH 08/10] KVM: x86: Drop @invalidate_gpa param from kvm_x86_ops' tlb_flush() Sean Christopherson
2020-02-21 13:56 ` Vitaly Kuznetsov
2020-02-20 20:43 ` [PATCH 09/10] KVM: VMX: Drop @invalidate_gpa from __vmx_flush_tlb() Sean Christopherson
2020-02-20 20:43 ` Sean Christopherson [this message]
2020-02-21 13:20 ` [PATCH 00/10] KVM: x86: Clean up VMX's TLB flushing code Paolo Bonzini
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