[PART1 RFC v4 02/11] KVM: x86: Introducing kvm_x86_ops VM init/uninit hooks

[Suravee Suthikulpanit]

Adding function pointers in struct kvm_x86_ops for processor-specific
layer to provide hooks for when KVM initialize and un-initialize VM.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
---
 arch/x86/include/asm/kvm_host.h | 3 +++
 arch/x86/kvm/x86.c              | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index f62a9f37..22bd70c 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -848,6 +848,9 @@ struct kvm_x86_ops {
        bool (*cpu_has_high_real_mode_segbase)(void);
        void (*cpuid_update)(struct kvm_vcpu *vcpu);
 
+       int (*vm_init)(struct kvm *kvm);
+       void (*vm_uninit)(struct kvm *kvm);
+
        /* Create, but do not attach this VCPU */
        struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
        void (*vcpu_free)(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 742d0f7..d12583e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7754,6 +7754,9 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
        kvm_page_track_init(kvm);
        kvm_mmu_init_vm(kvm);
 
+       if (kvm_x86_ops->vm_init)
+               return kvm_x86_ops->vm_init(kvm);
+
        return 0;
 }
 
@@ -7781,6 +7784,9 @@ static void kvm_free_vcpus(struct kvm *kvm)
        kvm_for_each_vcpu(i, vcpu, kvm)
                kvm_arch_vcpu_free(vcpu);
 
+       if (kvm_x86_ops->vm_uninit)
+               kvm_x86_ops->vm_uninit(kvm);
+
        mutex_lock(&kvm->lock);
        for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
                kvm->vcpus[i] = NULL;
-- 
1.9.1