From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.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,
Junaid Shahid <junaids@google.com>,
Maxim Levitsky <mlevitsk@redhat.com>,
Lai Jiangshan <laijs@linux.alibaba.com>
Subject: [PATCH 05/15] KVM: x86: Uncondtionally skip MMU sync/TLB flush in MOV CR3's PGD switch
Date: Wed, 9 Jun 2021 16:42:25 -0700 [thread overview]
Message-ID: <20210609234235.1244004-6-seanjc@google.com> (raw)
In-Reply-To: <20210609234235.1244004-1-seanjc@google.com>
Stop leveraging the MMU sync and TLB flush requested by the fast PGD
switch helper now that kvm_set_cr3() manually handles the necessary sync,
frees, and TLB flush. This will allow dropping the params from the fast
PGD helpers since nested SVM is now the odd blob out.
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/x86.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e2f6d6a1ba54..02ceb1f606f4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1136,7 +1136,7 @@ int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
return 1;
if (cr3 != kvm_read_cr3(vcpu))
- kvm_mmu_new_pgd(vcpu, cr3, skip_tlb_flush, skip_tlb_flush);
+ kvm_mmu_new_pgd(vcpu, cr3, true, true);
vcpu->arch.cr3 = cr3;
kvm_register_mark_available(vcpu, VCPU_EXREG_CR3);
--
2.32.0.rc1.229.g3e70b5a671-goog
next prev parent reply other threads:[~2021-06-09 23:43 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-09 23:42 [PATCH 00/15] KVM: x86/mmu: TLB fixes and related cleanups Sean Christopherson
2021-06-09 23:42 ` [PATCH 01/15] KVM: nVMX: Sync all PGDs on nested transition with shadow paging Sean Christopherson
2021-06-09 23:42 ` [PATCH 02/15] KVM: nVMX: Ensure 64-bit shift when checking VMFUNC bitmap Sean Christopherson
2021-06-09 23:42 ` [PATCH 03/15] KVM: nVMX: Don't clobber nested MMU's A/D status on EPTP switch Sean Christopherson
2021-06-09 23:42 ` [PATCH 04/15] KVM: x86: Invalidate all PGDs for the current PCID on MOV CR3 w/ flush Sean Christopherson
2021-06-09 23:42 ` Sean Christopherson [this message]
2021-06-09 23:42 ` [PATCH 06/15] KVM: nSVM: Move TLB flushing logic (or lack thereof) to dedicated helper Sean Christopherson
2021-06-09 23:42 ` [PATCH 07/15] KVM: x86: Drop skip MMU sync and TLB flush params from "new PGD" helpers Sean Christopherson
2021-06-09 23:42 ` [PATCH 08/15] KVM: nVMX: Consolidate VM-Enter/VM-Exit TLB flush and MMU sync logic Sean Christopherson
2021-06-09 23:42 ` [PATCH 09/15] KVM: nVMX: Free only guest_mode (L2) roots on INVVPID w/o EPT Sean Christopherson
2021-06-09 23:42 ` [PATCH 10/15] KVM: x86: Use KVM_REQ_TLB_FLUSH_GUEST to handle INVPCID(ALL) emulation Sean Christopherson
2021-06-09 23:42 ` [PATCH 11/15] KVM: nVMX: Use fast PGD switch when emulating VMFUNC[EPTP_SWITCH] Sean Christopherson
2021-06-09 23:42 ` [PATCH 12/15] KVM: x86: Defer MMU sync on PCID invalidation Sean Christopherson
2021-06-09 23:42 ` [PATCH 13/15] KVM: x86: Drop pointless @reset_roots from kvm_init_mmu() Sean Christopherson
2021-06-09 23:42 ` [PATCH 14/15] KVM: nVMX: WARN if subtly-impossible VMFUNC conditions occur Sean Christopherson
2021-06-09 23:42 ` [PATCH 15/15] KVM: nVMX: Drop redundant checks on vmcs12 in EPTP switching emulation Sean Christopherson
2021-06-10 16:09 ` Paolo Bonzini
2021-06-10 16:10 ` [PATCH 00/15] KVM: x86/mmu: TLB fixes and related cleanups Paolo Bonzini
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