From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: vkuznets@redhat.com, Joerg Roedel <jroedel@suse.de>
Subject: [PATCH 17/24] KVM: nSVM: do all MMU switch work in init/uninit functions
Date: Wed, 20 May 2020 13:21:38 -0400 [thread overview]
Message-ID: <20200520172145.23284-18-pbonzini@redhat.com> (raw)
In-Reply-To: <20200520172145.23284-1-pbonzini@redhat.com>
Move the kvm_mmu_reset_context calls to nested_svm_init_mmu_context and
nested_svm_uninit_mmu_context, so that the state of the MMU is consistent
with the vcpu->arch.mmu and vcpu->arch.walk_mmu state. Remove an
unnecessary kvm_mmu_load, which can wait until the first vcpu_run.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/svm/nested.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 024e27bebba3..54a3384a60f8 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -90,12 +90,17 @@ static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
vcpu->arch.mmu->shadow_root_level = vcpu->arch.tdp_level;
reset_shadow_zero_bits_mask(vcpu, vcpu->arch.mmu);
vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu;
+
+ /* Guest paging mode is active - reset mmu */
+ kvm_mmu_reset_context(vcpu);
}
static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
{
vcpu->arch.mmu = &vcpu->arch.root_mmu;
vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
+
+ kvm_mmu_reset_context(vcpu);
}
void recalc_intercepts(struct vcpu_svm *svm)
@@ -277,9 +282,6 @@ static void nested_prepare_vmcb_control(struct vcpu_svm *svm)
if (svm->nested.ctl.nested_ctl & SVM_NESTED_CTL_NP_ENABLE)
nested_svm_init_mmu_context(&svm->vcpu);
- /* Guest paging mode is active - reset mmu */
- kvm_mmu_reset_context(&svm->vcpu);
-
svm_flush_tlb(&svm->vcpu);
svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset =
@@ -573,8 +575,6 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
kvm_vcpu_unmap(&svm->vcpu, &map, true);
nested_svm_uninit_mmu_context(&svm->vcpu);
- kvm_mmu_reset_context(&svm->vcpu);
- kvm_mmu_load(&svm->vcpu);
/*
* Drop what we picked up for L2 via svm_complete_interrupts() so it
--
2.18.2
next prev parent reply other threads:[~2020-05-20 17:22 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-20 17:21 [PATCH 00/24] KVM: nSVM: event fixes and migration support Paolo Bonzini
2020-05-20 17:21 ` [PATCH 01/24] KVM: nSVM: fix condition for filtering async PF Paolo Bonzini
2020-05-26 0:23 ` Sasha Levin
2020-05-20 17:21 ` [PATCH 02/24] KVM: nSVM: leave ASID aside in copy_vmcb_control_area Paolo Bonzini
2020-05-26 0:23 ` Sasha Levin
2020-05-20 17:21 ` [PATCH 03/24] KVM: nSVM: inject exceptions via svm_check_nested_events Paolo Bonzini
2020-05-20 17:21 ` [PATCH 04/24] KVM: nSVM: remove exit_required Paolo Bonzini
2020-05-20 17:21 ` [PATCH 05/24] KVM: nSVM: correctly inject INIT vmexits Paolo Bonzini
2020-05-20 17:21 ` [PATCH 06/24] KVM: nSVM: move map argument out of enter_svm_guest_mode Paolo Bonzini
2020-05-20 17:21 ` [PATCH 07/24] KVM: nSVM: extract load_nested_vmcb_control Paolo Bonzini
2020-05-20 17:21 ` [PATCH 08/24] KVM: nSVM: extract preparation of VMCB for nested run Paolo Bonzini
2020-05-20 17:21 ` [PATCH 09/24] KVM: nSVM: clean up tsc_offset update Paolo Bonzini
2020-05-20 17:21 ` [PATCH 10/24] KVM: nSVM: pass vmcb_control_area to copy_vmcb_control_area Paolo Bonzini
2020-05-20 17:21 ` [PATCH 11/24] KVM: nSVM: remove trailing padding for struct vmcb_control_area Paolo Bonzini
2020-05-20 17:21 ` [PATCH 12/24] KVM: nSVM: save all control fields in svm->nested Paolo Bonzini
2020-05-20 17:21 ` [PATCH 13/24] KVM: nSVM: do not reload pause filter fields from VMCB Paolo Bonzini
2020-05-20 17:21 ` [PATCH 14/24] KVM: nSVM: remove HF_VINTR_MASK Paolo Bonzini
2020-05-20 17:21 ` [PATCH 15/24] KVM: nSVM: remove HF_HIF_MASK Paolo Bonzini
2020-05-20 17:21 ` [PATCH 16/24] KVM: nSVM: split nested_vmcb_check_controls Paolo Bonzini
2020-05-20 17:21 ` Paolo Bonzini [this message]
2020-05-20 17:21 ` [PATCH 18/24] KVM: nSVM: leave guest mode when clearing EFER.SVME Paolo Bonzini
2020-05-20 17:21 ` [PATCH 19/24] KVM: nSVM: extract svm_set_gif Paolo Bonzini
2020-05-20 17:21 ` [PATCH 20/24] KVM: MMU: pass arbitrary CR0/CR4/EFER to kvm_init_shadow_mmu Paolo Bonzini
2020-05-20 17:21 ` [PATCH 21/24] KVM: x86: always update CR3 in VMCB Paolo Bonzini
2020-05-20 18:22 ` Sean Christopherson
2020-05-20 20:14 ` Paolo Bonzini
2020-05-22 22:47 ` Sean Christopherson
2020-05-23 7:07 ` Paolo Bonzini
2020-05-20 18:24 ` Sean Christopherson
2020-05-20 17:21 ` [PATCH 22/24] uaccess: add memzero_user Paolo Bonzini
2020-05-20 20:40 ` Christoph Hellwig
2020-05-20 20:50 ` Al Viro
2020-05-20 21:13 ` Paolo Bonzini
2020-05-20 21:28 ` Al Viro
2020-05-20 21:33 ` Paolo Bonzini
2020-05-20 17:21 ` [PATCH 23/24] selftests: kvm: add a SVM version of state-test Paolo Bonzini
2020-05-20 17:21 ` [PATCH 24/24] KVM: nSVM: implement KVM_GET_NESTED_STATE and KVM_SET_NESTED_STATE Paolo Bonzini
2020-05-20 19:24 ` [PATCH 00/24] KVM: nSVM: event fixes and migration support Maxim Levitsky
2020-05-20 20:42 ` Paolo Bonzini
2020-05-20 21:08 ` Maxim Levitsky
2020-05-20 21:15 ` Paolo Bonzini
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