[PATCH 04/30] KVM: nSVM: remove exit_required

[Paolo Bonzini]

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 <pbonz...@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 1ae13fd17028..3d17c62a84a3 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -792,8 +792,7 @@ 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 89b6fb1e0abc..545f63ebc720 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;
-- 
2.26.2