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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 04/24] KVM: nSVM: remove exit_required
Date: Wed, 20 May 2020 13:21:25 -0400	[thread overview]
Message-ID: <20200520172145.23284-5-pbonzini@redhat.com> (raw)
In-Reply-To: <20200520172145.23284-1-pbonzini@redhat.com>

All events now inject vmexits before vmentry rather than after vmexit.  Therefore,
exit_required is not set anymore and we can remove it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/svm/nested.c |  3 +--
 arch/x86/kvm/svm/svm.c    | 14 --------------
 arch/x86/kvm/svm/svm.h    |  3 ---
 3 files changed, 1 insertion(+), 19 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index e80349132ea1..dd2868dd6129 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -785,8 +785,7 @@ static int svm_check_nested_events(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_svm *svm = to_svm(vcpu);
 	bool block_nested_events =
-		kvm_event_needs_reinjection(vcpu) || svm->nested.exit_required ||
-		svm->nested.nested_run_pending;
+		kvm_event_needs_reinjection(vcpu) || svm->nested.nested_run_pending;
 
 	if (vcpu->arch.exception.pending) {
 		if (block_nested_events)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 9da4e5b6d724..04332d0efa5f 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2889,13 +2889,6 @@ static int handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
 	if (npt_enabled)
 		vcpu->arch.cr3 = svm->vmcb->save.cr3;
 
-	if (unlikely(svm->nested.exit_required)) {
-		nested_svm_vmexit(svm);
-		svm->nested.exit_required = false;
-
-		return 1;
-	}
-
 	if (is_guest_mode(vcpu)) {
 		int vmexit;
 
@@ -3327,13 +3320,6 @@ static fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
 	svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
 	svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
 
-	/*
-	 * A vmexit emulation is required before the vcpu can be executed
-	 * again.
-	 */
-	if (unlikely(svm->nested.exit_required))
-		return EXIT_FASTPATH_NONE;
-
 	/*
 	 * Disable singlestep if we're injecting an interrupt/exception.
 	 * We don't want our modified rflags to be pushed on the stack where
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 8342032291fc..89fab75dd4f5 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -95,9 +95,6 @@ struct nested_state {
 	u64 vmcb_msrpm;
 	u64 vmcb_iopm;
 
-	/* A VMEXIT is required but not yet emulated */
-	bool exit_required;
-
 	/* A VMRUN has started but has not yet been performed, so
 	 * we cannot inject a nested vmexit yet.  */
 	bool nested_run_pending;
-- 
2.18.2



  parent reply	other threads:[~2020-05-20 17:24 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 ` Paolo Bonzini [this message]
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 ` [PATCH 17/24] KVM: nSVM: do all MMU switch work in init/uninit functions Paolo Bonzini
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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