Commit dcbcfa28 authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Paolo Bonzini

KVM: svm: avic: Add support for dynamic setup/teardown of virtual APIC backing page

Re-factor avic_init_access_page() to avic_update_access_page() since
activate/deactivate AVIC requires setting/unsetting the memory region used
for virtual APIC backing page (APIC_ACCESS_PAGE_PRIVATE_MEMSLOT).
Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 8937d762
...@@ -1729,23 +1729,22 @@ static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu, ...@@ -1729,23 +1729,22 @@ static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
* field of the VMCB. Therefore, we set up the * field of the VMCB. Therefore, we set up the
* APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (4KB) here. * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (4KB) here.
*/ */
static int avic_init_access_page(struct kvm_vcpu *vcpu) static int avic_update_access_page(struct kvm *kvm, bool activate)
{ {
struct kvm *kvm = vcpu->kvm;
int ret = 0; int ret = 0;
mutex_lock(&kvm->slots_lock); mutex_lock(&kvm->slots_lock);
if (kvm->arch.apic_access_page_done) if (kvm->arch.apic_access_page_done == activate)
goto out; goto out;
ret = __x86_set_memory_region(kvm, ret = __x86_set_memory_region(kvm,
APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
APIC_DEFAULT_PHYS_BASE, APIC_DEFAULT_PHYS_BASE,
PAGE_SIZE); activate ? PAGE_SIZE : 0);
if (ret) if (ret)
goto out; goto out;
kvm->arch.apic_access_page_done = true; kvm->arch.apic_access_page_done = activate;
out: out:
mutex_unlock(&kvm->slots_lock); mutex_unlock(&kvm->slots_lock);
return ret; return ret;
...@@ -1758,7 +1757,7 @@ static int avic_init_backing_page(struct kvm_vcpu *vcpu) ...@@ -1758,7 +1757,7 @@ static int avic_init_backing_page(struct kvm_vcpu *vcpu)
int id = vcpu->vcpu_id; int id = vcpu->vcpu_id;
struct vcpu_svm *svm = to_svm(vcpu); struct vcpu_svm *svm = to_svm(vcpu);
ret = avic_init_access_page(vcpu); ret = avic_update_access_page(vcpu->kvm, true);
if (ret) if (ret)
return ret; return ret;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment