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KVM: x86: Introduce .hv_inject_synthetic_vmexit_post_tlb_flush() nested hook

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Hyper-V supports injecting synthetic L2->L1 exit after performing
L2 TLB flush operation but the procedure is vendor specific. Introduce
.hv_inject_synthetic_vmexit_post_tlb_flush nested hook for it.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-22-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2022-11-01 15:53:59 +01:00 committed by Paolo Bonzini
parent e45aa2444d
commit b0c9c25e46
8 changed files with 23 additions and 1 deletions
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1
arch/x86/include/asm/kvm_host.h
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@ -1722,6 +1722,7 @@ struct kvm_x86_nested_ops {
int (*enable_evmcs)(struct kvm_vcpu *vcpu,
uint16_t *vmcs_version);
uint16_t (*get_evmcs_version)(struct kvm_vcpu *vcpu);
void (*hv_inject_synthetic_vmexit_post_tlb_flush)(struct kvm_vcpu *vcpu);
};
struct kvm_x86_init_ops {

3
arch/x86/kvm/Makefile
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@ -26,7 +26,8 @@ kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
vmx/hyperv.o vmx/nested.o vmx/posted_intr.o
kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o svm/sev.o
kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o \
svm/sev.o svm/hyperv.o
ifdef CONFIG_HYPERV
kvm-amd-y += svm/svm_onhyperv.o

11
arch/x86/kvm/svm/hyperv.c Normal file
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@ -0,0 +1,11 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* AMD SVM specific code for Hyper-V on KVM.
*
* Copyright 2022 Red Hat, Inc. and/or its affiliates.
*/
#include "hyperv.h"
void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu)
{
}

2
arch/x86/kvm/svm/hyperv.h
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@ -25,4 +25,6 @@ static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu)
hv_vcpu->nested.vp_id = hve->hv_vp_id;
}
void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
#endif /* __ARCH_X86_KVM_SVM_HYPERV_H__ */

1
arch/x86/kvm/svm/nested.c
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@ -1730,4 +1730,5 @@ struct kvm_x86_nested_ops svm_nested_ops = {
.get_nested_state_pages = svm_get_nested_state_pages,
.get_state = svm_get_nested_state,
.set_state = svm_set_nested_state,
.hv_inject_synthetic_vmexit_post_tlb_flush = svm_hv_inject_synthetic_vmexit_post_tlb_flush,
};

4
arch/x86/kvm/vmx/hyperv.c
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@ -506,3 +506,7 @@ int nested_enable_evmcs(struct kvm_vcpu *vcpu,
return 0;
}
void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu)
{
}

1
arch/x86/kvm/vmx/hyperv.h
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@ -243,5 +243,6 @@ int nested_enable_evmcs(struct kvm_vcpu *vcpu,
uint16_t *vmcs_version);
void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
#endif /* __KVM_X86_VMX_HYPERV_H */

1
arch/x86/kvm/vmx/nested.c
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@ -6995,4 +6995,5 @@ struct kvm_x86_nested_ops vmx_nested_ops = {
.write_log_dirty = nested_vmx_write_pml_buffer,
.enable_evmcs = nested_enable_evmcs,
.get_evmcs_version = nested_get_evmcs_version,
.hv_inject_synthetic_vmexit_post_tlb_flush = vmx_hv_inject_synthetic_vmexit_post_tlb_flush,
};