[PATCH v4 32/37] KVM: selftests: nVMX: Allocate Hyper-V partition assist page

Vitaly Kuznetsov
2022-05-25T09:06:29Z

In preparation to testing Hyper-V L2 TLB flush hypercalls, allocate
so-called Partition assist page and link it to 'struct vmx_pages'.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
tools/testing/selftests/kvm/include/x86_64/vmx.h | 4 ++++
tools/testing/selftests/kvm/lib/x86_64/vmx.c | 7 +++++++
2 files changed, 11 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/x86_64/vmx.h b/tools/testing/selftests/kvm/include/x86_64/vmx.h
index 583ceb0d1457..f99922ca8259 100644
--- a/tools/testing/selftests/kvm/include/x86_64/vmx.h
+++ b/tools/testing/selftests/kvm/include/x86_64/vmx.h
@@ -567,6 +567,10 @@ struct vmx_pages {
uint64_t enlightened_vmcs_gpa;
void *enlightened_vmcs;

+ void *partition_assist_hva;
+ uint64_t partition_assist_gpa;
+ void *partition_assist;
+
void *eptp_hva;
uint64_t eptp_gpa;
void *eptp;
diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
index d089d8b850b5..3db21e0e1a8f 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
@@ -124,6 +124,13 @@ vcpu_alloc_vmx(struct kvm_vm *vm, vm_vaddr_t *p_vmx_gva)
vmx->enlightened_vmcs_gpa =
addr_gva2gpa(vm, (uintptr_t)vmx->enlightened_vmcs);

+ /* Setup of a region of guest memory for the partition assist page. */
+ vmx->partition_assist = (void *)vm_vaddr_alloc_page(vm);
+ vmx->partition_assist_hva =
+ addr_gva2hva(vm, (uintptr_t)vmx->partition_assist);
+ vmx->partition_assist_gpa =
+ addr_gva2gpa(vm, (uintptr_t)vmx->partition_assist);
+
*p_vmx_gva = vmx_gva;
return vmx;
}
--
2.35.3