From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Add a second kvm_x86_ops hook in kvm_arch_vm_destroy() to support TDX's
destruction path, which needs to first put the VM into a teardown state,
then free per-vCPU resource, and finally free per-VM resources.
Note, this knowingly creates a discrepancy in nomenclature for SVM as
svm_vm_teardown() invokes avic_vm_destroy() and sev_vm_destroy().
Moving the now-misnamed functions or renaming them is left to a future
patch so as not to introduce a functional change for SVM.
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/svm/svm.c | 8 +++++++-
arch/x86/kvm/vmx/vmx.c | 12 ++++++++++++
arch/x86/kvm/x86.c | 4 ++--
4 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 32e995327944..a6c89666ec49 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1100,6 +1100,7 @@ struct kvm_x86_ops {
bool (*is_vm_type_supported)(unsigned long vm_type);
unsigned int vm_size;
int (*vm_init)(struct kvm *kvm);
+ void (*vm_teardown)(struct kvm *kvm);
void (*vm_destroy)(struct kvm *kvm);
/* Create, but do not attach this VCPU */
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 241a26e1fa71..15836446a9b8 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4155,12 +4155,17 @@ static bool svm_apic_init_signal_blocked(struct kvm_vcpu *vcpu)
(vmcb_is_intercept(&svm->vmcb->control, INTERCEPT_INIT));
}
-static void svm_vm_destroy(struct kvm *kvm)
+static void svm_vm_teardown(struct kvm *kvm)
{
avic_vm_destroy(kvm);
sev_vm_destroy(kvm);
}
+static void svm_vm_destroy(struct kvm *kvm)
+{
+
+}
+
static bool svm_is_vm_type_supported(unsigned long type)
{
return type == KVM_X86_LEGACY_VM;
@@ -4195,6 +4200,7 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
.is_vm_type_supported = svm_is_vm_type_supported,
.vm_size = sizeof(struct kvm_svm),
.vm_init = svm_vm_init,
+ .vm_teardown = svm_vm_teardown,
.vm_destroy = svm_vm_destroy,
.prepare_guest_switch = svm_prepare_guest_switch,
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 2ee7eb7dac26..3559b51f566d 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7010,6 +7010,16 @@ static int vmx_vm_init(struct kvm *kvm)
return 0;
}
+static void vmx_vm_teardown(struct kvm *kvm)
+{
+
+}
+
+static void vmx_vm_destroy(struct kvm *kvm)
+{
+
+}
+
static int __init vmx_check_processor_compat(void)
{
struct vmcs_config vmcs_conf;
@@ -7611,6 +7621,8 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.is_vm_type_supported = vmx_is_vm_type_supported,
.vm_size = sizeof(struct kvm_vmx),
.vm_init = vmx_vm_init,
+ .vm_teardown = vmx_vm_teardown,
+ .vm_destroy = vmx_vm_destroy,
.vcpu_create = vmx_create_vcpu,
.vcpu_free = vmx_free_vcpu,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7b8bbdc98492..42bd24ba7fdd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10533,10 +10533,9 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
__x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0);
mutex_unlock(&kvm->slots_lock);
}
- if (kvm_x86_ops.vm_destroy)
- kvm_x86_ops.vm_destroy(kvm);
for (i = 0; i < kvm->arch.msr_filter.count; i++)
kfree(kvm->arch.msr_filter.ranges[i].bitmap);
+ kvm_x86_ops.vm_teardown(kvm);
kvm_pic_destroy(kvm);
kvm_ioapic_destroy(kvm);
kvm_free_vcpus(kvm);
@@ -10545,6 +10544,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
kvm_mmu_uninit_vm(kvm);
kvm_page_track_cleanup(kvm);
kvm_hv_destroy_vm(kvm);
+ kvm_x86_ops.vm_destroy(kvm);
}
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
--
2.17.1
