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KVM: x86: move nested-related kvm_x86_ops to a separate struct

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Clean up some of the patching of kvm_x86_ops, by moving kvm_x86_ops related to
nested virtualization into a separate struct.

As a result, these ops will always be non-NULL on VMX.  This is not a problem:

* check_nested_events is only called if is_guest_mode(vcpu) returns true

* get_nested_state treats VMXOFF state the same as nested being disabled

* set_nested_state fails if you attempt to set nested state while
  nesting is disabled

* nested_enable_evmcs could already be called on a CPU without VMX enabled
  in CPUID.

* nested_get_evmcs_version was fixed in the previous patch

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2020-04-17 10:24:18 -04:00
parent 25091990ef
commit 33b2217245
9 changed files with 56 additions and 52 deletions
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13
arch/x86/kvm/svm/svm.c
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@@ -3902,9 +3902,9 @@ static bool svm_apic_init_signal_blocked(struct kvm_vcpu *vcpu)
/*
* TODO: Last condition latch INIT signals on vCPU when
* vCPU is in guest-mode and vmcb12 defines intercept on INIT.
* To properly emulate the INIT intercept, SVM should implement
* kvm_x86_ops.check_nested_events() and call nested_svm_vmexit()
* there if an INIT signal is pending.
* To properly emulate the INIT intercept,
* svm_check_nested_events() should call nested_svm_vmexit()
* if an INIT signal is pending.
*/
return !gif_set(svm) ||
(svm->vmcb->control.intercept & (1ULL << INTERCEPT_INIT));
@@ -4032,6 +4032,8 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
.sched_in = svm_sched_in,
.pmu_ops = &amd_pmu_ops,
.nested_ops = &svm_nested_ops,
.deliver_posted_interrupt = svm_deliver_avic_intr,
.dy_apicv_has_pending_interrupt = svm_dy_apicv_has_pending_interrupt,
.update_pi_irte = svm_update_pi_irte,
@@ -4046,14 +4048,9 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
.mem_enc_reg_region = svm_register_enc_region,
.mem_enc_unreg_region = svm_unregister_enc_region,
.nested_enable_evmcs = NULL,
.nested_get_evmcs_version = NULL,
.need_emulation_on_page_fault = svm_need_emulation_on_page_fault,
.apic_init_signal_blocked = svm_apic_init_signal_blocked,
.check_nested_events = svm_check_nested_events,
};
static struct kvm_x86_init_ops svm_init_ops __initdata = {