[PATCH v2 014/144] KVM: selftests: Add vcpu_get() to retrieve and assert on vCPU existence

Sean Christopherson
2022-06-03T00:47:51Z

Add vcpu_get() to wrap vcpu_find() and deduplicate a pile of code that
asserts the requested vCPU exists.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
tools/testing/selftests/kvm/lib/kvm_util.c | 56 ++++++-------------
.../selftests/kvm/lib/kvm_util_internal.h | 2 +-
.../selftests/kvm/lib/s390x/processor.c | 5 +-
.../selftests/kvm/lib/x86_64/processor.c | 4 +-
4 files changed, 20 insertions(+), 47 deletions(-)

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 73123b9d9625..940decfaa633 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -561,23 +561,7 @@ kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,
return &region->region;
}

-/*
- * VCPU Find
- *
- * Input Args:
- * vm - Virtual Machine
- * vcpuid - VCPU ID
- *
- * Output Args: None
- *
- * Return:
- * Pointer to VCPU structure
- *
- * Locates a vcpu structure that describes the VCPU specified by vcpuid and
- * returns a pointer to it. Returns NULL if the VM doesn't contain a VCPU
- * for the specified vcpuid.
- */
-struct vcpu *vcpu_find(struct kvm_vm *vm, uint32_t vcpuid)
+static struct vcpu *vcpu_find(struct kvm_vm *vm, uint32_t vcpuid)
{
struct vcpu *vcpu;

@@ -589,6 +573,14 @@ struct vcpu *vcpu_find(struct kvm_vm *vm, uint32_t vcpuid)
return NULL;
}

+struct vcpu *vcpu_get(struct kvm_vm *vm, uint32_t vcpuid)
+{
+ struct vcpu *vcpu = vcpu_find(vm, vcpuid);
+
+ TEST_ASSERT(vcpu, "vCPU %d does not exist", vcpuid);
+ return vcpu;
+}
+
/*
* VM VCPU Remove
*
@@ -1568,8 +1560,7 @@ void vm_create_irqchip(struct kvm_vm *vm)
*/
struct kvm_run *vcpu_state(struct kvm_vm *vm, uint32_t vcpuid)
{
- struct vcpu *vcpu = vcpu_find(vm, vcpuid);
- TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid);
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);

return vcpu->state;
}
@@ -1610,11 +1601,9 @@ int _vcpu_run(struct kvm_vm *vm, uint32_t vcpuid)

void vcpu_run_complete_io(struct kvm_vm *vm, uint32_t vcpuid)
{
- struct vcpu *vcpu = vcpu_find(vm, vcpuid);
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);
int ret;

- TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid);
-
vcpu->state->immediate_exit = 1;
ret = __vcpu_run(vm, vcpuid);
vcpu->state->immediate_exit = 0;
@@ -1656,14 +1645,9 @@ struct kvm_reg_list *vcpu_get_reg_list(struct kvm_vm *vm, uint32_t vcpuid)
int __vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid,
unsigned long cmd, void *arg)
{
- struct vcpu *vcpu = vcpu_find(vm, vcpuid);
- int ret;
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);

- TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid);
-
- ret = ioctl(vcpu->fd, cmd, arg);
-
- return ret;
+ return ioctl(vcpu->fd, cmd, arg);
}

void _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long cmd,
@@ -1676,15 +1660,11 @@ void _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long cmd,

void *vcpu_map_dirty_ring(struct kvm_vm *vm, uint32_t vcpuid)
{
- struct vcpu *vcpu;
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);
uint32_t size = vm->dirty_ring_size;

TEST_ASSERT(size > 0, "Should enable dirty ring first");

- vcpu = vcpu_find(vm, vcpuid);
-
- TEST_ASSERT(vcpu, "Cannot find vcpu %u", vcpuid);
-
if (!vcpu->dirty_gfns) {
void *addr;

@@ -1840,9 +1820,7 @@ int kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
int _vcpu_has_device_attr(struct kvm_vm *vm, uint32_t vcpuid, uint32_t group,
uint64_t attr)
{
- struct vcpu *vcpu = vcpu_find(vm, vcpuid);
-
- TEST_ASSERT(vcpu, "nonexistent vcpu id: %d", vcpuid);
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);

return _kvm_device_check_attr(vcpu->fd, group, attr);
}
@@ -1859,9 +1837,7 @@ int vcpu_has_device_attr(struct kvm_vm *vm, uint32_t vcpuid, uint32_t group,
int _vcpu_access_device_attr(struct kvm_vm *vm, uint32_t vcpuid, uint32_t group,
uint64_t attr, void *val, bool write)
{
- struct vcpu *vcpu = vcpu_find(vm, vcpuid);
-
- TEST_ASSERT(vcpu, "nonexistent vcpu id: %d", vcpuid);
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);

return _kvm_device_access(vcpu->fd, group, attr, val, write);
}
diff --git a/tools/testing/selftests/kvm/lib/kvm_util_internal.h b/tools/testing/selftests/kvm/lib/kvm_util_internal.h
index a03febc24ba6..0c7c44499129 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util_internal.h
+++ b/tools/testing/selftests/kvm/lib/kvm_util_internal.h
@@ -69,7 +69,7 @@ struct kvm_vm {
uint32_t dirty_ring_size;
};

-struct vcpu *vcpu_find(struct kvm_vm *vm, uint32_t vcpuid);
+struct vcpu *vcpu_get(struct kvm_vm *vm, uint32_t vcpuid);

/*
* Virtual Translation Tables Dump
diff --git a/tools/testing/selftests/kvm/lib/s390x/processor.c b/tools/testing/selftests/kvm/lib/s390x/processor.c
index f87c7137598e..7cc1051c4b71 100644
--- a/tools/testing/selftests/kvm/lib/s390x/processor.c
+++ b/tools/testing/selftests/kvm/lib/s390x/processor.c
@@ -208,10 +208,7 @@ void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...)

void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent)
{
- struct vcpu *vcpu = vcpu_find(vm, vcpuid);
-
- if (!vcpu)
- return;
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);

fprintf(stream, "%*spstate: psw: 0x%.16llx:0x%.16llx\n",
indent, "", vcpu->state->psw_mask, vcpu->state->psw_addr);
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 27c40b5ab01d..bd9d1b63b848 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -996,7 +996,7 @@ static int vcpu_save_xsave_state(struct kvm_vm *vm, struct vcpu *vcpu,

struct kvm_x86_state *vcpu_save_state(struct kvm_vm *vm, uint32_t vcpuid)
{
- struct vcpu *vcpu = vcpu_find(vm, vcpuid);
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);
struct kvm_msr_list *list;
struct kvm_x86_state *state;
int nmsrs, r, i;
@@ -1079,7 +1079,7 @@ struct kvm_x86_state *vcpu_save_state(struct kvm_vm *vm, uint32_t vcpuid)

void vcpu_load_state(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_x86_state *state)
{
- struct vcpu *vcpu = vcpu_find(vm, vcpuid);
+ struct vcpu *vcpu = vcpu_get(vm, vcpuid);
int r;

r = ioctl(vcpu->fd, KVM_SET_SREGS, &state->sregs);
--
2.36.1.255.ge46751e96f-goog