[PATCH v11 42/46] KVM: selftests: Create a vendor independent helper to allocate Hyper-V specific test pages

Vitaly Kuznetsov
2022-10-04T12:56:58Z

There's no need to pollute VMX and SVM code with Hyper-V specific
stuff and allocate Hyper-V specific test pages for all test as only
few really need them. Create a dedicated struct and an allocation
helper.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
.../selftests/kvm/include/x86_64/evmcs.h | 4 ++--
.../selftests/kvm/include/x86_64/hyperv.h | 15 +++++++++++++
.../selftests/kvm/include/x86_64/vmx.h | 8 -------
.../testing/selftests/kvm/lib/x86_64/hyperv.c | 20 +++++++++++++++++
tools/testing/selftests/kvm/lib/x86_64/vmx.c | 12 ----------
.../testing/selftests/kvm/x86_64/evmcs_test.c | 22 +++++++++----------
6 files changed, 48 insertions(+), 33 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/x86_64/evmcs.h b/tools/testing/selftests/kvm/include/x86_64/evmcs.h
index 59b60d45b8f6..94d6059e9a12 100644
--- a/tools/testing/selftests/kvm/include/x86_64/evmcs.h
+++ b/tools/testing/selftests/kvm/include/x86_64/evmcs.h
@@ -256,9 +256,9 @@ static inline int evmcs_vmptrld(uint64_t vmcs_pa, void *vmcs)
return 0;
}

-static inline bool load_evmcs(uint64_t enlightened_vmcs_gpa, void *enlightened_vmcs)
+static inline bool load_evmcs(struct hyperv_test_pages *hv)
{
- if (evmcs_vmptrld(enlightened_vmcs_gpa, enlightened_vmcs))
+ if (evmcs_vmptrld(hv->enlightened_vmcs_gpa, hv->enlightened_vmcs))
return false;

current_evmcs->revision_id = EVMCS_VERSION;
diff --git a/tools/testing/selftests/kvm/include/x86_64/hyperv.h b/tools/testing/selftests/kvm/include/x86_64/hyperv.h
index 3a17431c5771..186f3aab888f 100644
--- a/tools/testing/selftests/kvm/include/x86_64/hyperv.h
+++ b/tools/testing/selftests/kvm/include/x86_64/hyperv.h
@@ -267,4 +267,19 @@ extern struct hv_vp_assist_page *current_vp_assist;

int enable_vp_assist(uint64_t vp_assist_pa, void *vp_assist);

+struct hyperv_test_pages {
+ /* VP assist page */
+ void *vp_assist_hva;
+ uint64_t vp_assist_gpa;
+ void *vp_assist;
+
+ /* Enlightened VMCS */
+ void *enlightened_vmcs_hva;
+ uint64_t enlightened_vmcs_gpa;
+ void *enlightened_vmcs;
+};
+
+struct hyperv_test_pages *vcpu_alloc_hyperv_test_pages(struct kvm_vm *vm,
+ vm_vaddr_t *p_hv_pages_gva);
+
#endif /* !SELFTEST_KVM_HYPERV_H */
diff --git a/tools/testing/selftests/kvm/include/x86_64/vmx.h b/tools/testing/selftests/kvm/include/x86_64/vmx.h
index d07f13c9fced..6d024e1c5f99 100644
--- a/tools/testing/selftests/kvm/include/x86_64/vmx.h
+++ b/tools/testing/selftests/kvm/include/x86_64/vmx.h
@@ -517,14 +517,6 @@ struct vmx_pages {
uint64_t vmwrite_gpa;
void *vmwrite;

- void *vp_assist_hva;
- uint64_t vp_assist_gpa;
- void *vp_assist;
-
- void *enlightened_vmcs_hva;
- uint64_t enlightened_vmcs_gpa;
- void *enlightened_vmcs;
-
void *eptp_hva;
uint64_t eptp_gpa;
void *eptp;
diff --git a/tools/testing/selftests/kvm/lib/x86_64/hyperv.c b/tools/testing/selftests/kvm/lib/x86_64/hyperv.c
index 32dc0afd9e5b..a2fc083c65ef 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/hyperv.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/hyperv.c
@@ -8,6 +8,26 @@
#include "processor.h"
#include "hyperv.h"

+struct hyperv_test_pages *vcpu_alloc_hyperv_test_pages(struct kvm_vm *vm,
+ vm_vaddr_t *p_hv_pages_gva)
+{
+ vm_vaddr_t hv_pages_gva = vm_vaddr_alloc_page(vm);
+ struct hyperv_test_pages *hv = addr_gva2hva(vm, hv_pages_gva);
+
+ /* Setup of a region of guest memory for the VP Assist page. */
+ hv->vp_assist = (void *)vm_vaddr_alloc_page(vm);
+ hv->vp_assist_hva = addr_gva2hva(vm, (uintptr_t)hv->vp_assist);
+ hv->vp_assist_gpa = addr_gva2gpa(vm, (uintptr_t)hv->vp_assist);
+
+ /* Setup of a region of guest memory for the enlightened VMCS. */
+ hv->enlightened_vmcs = (void *)vm_vaddr_alloc_page(vm);
+ hv->enlightened_vmcs_hva = addr_gva2hva(vm, (uintptr_t)hv->enlightened_vmcs);
+ hv->enlightened_vmcs_gpa = addr_gva2gpa(vm, (uintptr_t)hv->enlightened_vmcs);
+
+ *p_hv_pages_gva = hv_pages_gva;
+ return hv;
+}
+
int enable_vp_assist(uint64_t vp_assist_pa, void *vp_assist)
{
uint64_t val = (vp_assist_pa & HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_MASK) |
diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
index f8acbc7c8d7d..11e7f1f26624 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
@@ -107,18 +107,6 @@ vcpu_alloc_vmx(struct kvm_vm *vm, vm_vaddr_t *p_vmx_gva)
vmx->vmwrite_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmwrite);
memset(vmx->vmwrite_hva, 0, getpagesize());

- /* Setup of a region of guest memory for the VP Assist page. */
- vmx->vp_assist = (void *)vm_vaddr_alloc_page(vm);
- vmx->vp_assist_hva = addr_gva2hva(vm, (uintptr_t)vmx->vp_assist);
- vmx->vp_assist_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vp_assist);
-
- /* Setup of a region of guest memory for the enlightened VMCS. */
- vmx->enlightened_vmcs = (void *)vm_vaddr_alloc_page(vm);
- vmx->enlightened_vmcs_hva =
- addr_gva2hva(vm, (uintptr_t)vmx->enlightened_vmcs);
- vmx->enlightened_vmcs_gpa =
- addr_gva2gpa(vm, (uintptr_t)vmx->enlightened_vmcs);
-
*p_vmx_gva = vmx_gva;
return vmx;
}
diff --git a/tools/testing/selftests/kvm/x86_64/evmcs_test.c b/tools/testing/selftests/kvm/x86_64/evmcs_test.c
index 5a4c8b1873aa..74f076ba574b 100644
--- a/tools/testing/selftests/kvm/x86_64/evmcs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/evmcs_test.c
@@ -68,7 +68,7 @@ void l2_guest_code(void)
vmcall();
}

-void guest_code(struct vmx_pages *vmx_pages)
+void guest_code(struct vmx_pages *vmx_pages, struct hyperv_test_pages *hv_pages)
{
#define L2_GUEST_STACK_SIZE 64
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
@@ -78,23 +78,22 @@ void guest_code(struct vmx_pages *vmx_pages)
GUEST_SYNC(1);
GUEST_SYNC(2);

- enable_vp_assist(vmx_pages->vp_assist_gpa, vmx_pages->vp_assist);
+ enable_vp_assist(hv_pages->vp_assist_gpa, hv_pages->vp_assist);
evmcs_enable();

GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));
GUEST_SYNC(3);
- GUEST_ASSERT(load_evmcs(vmx_pages->enlightened_vmcs_gpa,
- vmx_pages->enlightened_vmcs));
- GUEST_ASSERT(vmptrstz() == vmx_pages->enlightened_vmcs_gpa);
+ GUEST_ASSERT(load_evmcs(hv_pages));
+ GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);

GUEST_SYNC(4);
- GUEST_ASSERT(vmptrstz() == vmx_pages->enlightened_vmcs_gpa);
+ GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);

prepare_vmcs(vmx_pages, l2_guest_code,
&l2_guest_stack[L2_GUEST_STACK_SIZE]);

GUEST_SYNC(5);
- GUEST_ASSERT(vmptrstz() == vmx_pages->enlightened_vmcs_gpa);
+ GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);
current_evmcs->revision_id = -1u;
GUEST_ASSERT(vmlaunch());
current_evmcs->revision_id = EVMCS_VERSION;
@@ -104,7 +103,7 @@ void guest_code(struct vmx_pages *vmx_pages)
PIN_BASED_NMI_EXITING);

GUEST_ASSERT(!vmlaunch());
- GUEST_ASSERT(vmptrstz() == vmx_pages->enlightened_vmcs_gpa);
+ GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);

/*
* NMI forces L2->L1 exit, resuming L2 and hope that EVMCS is
@@ -152,7 +151,7 @@ void guest_code(struct vmx_pages *vmx_pages)
GUEST_SYNC(11);

/* Try enlightened vmptrld with an incorrect GPA */
- evmcs_vmptrld(0xdeadbeef, vmx_pages->enlightened_vmcs);
+ evmcs_vmptrld(0xdeadbeef, hv_pages->enlightened_vmcs);
GUEST_ASSERT(vmlaunch());
GUEST_ASSERT(ud_count == 1);
GUEST_DONE();
@@ -199,7 +198,7 @@ static struct kvm_vcpu *save_restore_vm(struct kvm_vm *vm,

int main(int argc, char *argv[])
{
- vm_vaddr_t vmx_pages_gva = 0;
+ vm_vaddr_t vmx_pages_gva = 0, hv_pages_gva = 0;

struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
@@ -217,7 +216,8 @@ int main(int argc, char *argv[])
vcpu_enable_evmcs(vcpu);

vcpu_alloc_vmx(vm, &vmx_pages_gva);
- vcpu_args_set(vcpu, 1, vmx_pages_gva);
+ vcpu_alloc_hyperv_test_pages(vm, &hv_pages_gva);
+ vcpu_args_set(vcpu, 2, vmx_pages_gva, hv_pages_gva);

vm_init_descriptor_tables(vm);
vcpu_init_descriptor_tables(vcpu);
--
2.37.3