[PATCH 015/128] KVM: sefltests: Use vm_ioctl() and __vm_ioctl() helpers

Sean Christopherson
2022-05-04T22:53:15Z

Use the recently introduced VM-specific ioctl() helpers instead of open
coding calls to ioctl() just to pretty print the ioctl name. Keep a few
open coded assertions that provide additional info.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
.../selftests/kvm/include/kvm_util_base.h | 60 +++++++--
.../selftests/kvm/kvm_binary_stats_test.c | 6 +-
.../testing/selftests/kvm/lib/aarch64/vgic.c | 6 +-
tools/testing/selftests/kvm/lib/kvm_util.c | 116 ++----------------
.../selftests/kvm/set_memory_region_test.c | 3 +-
.../kvm/x86_64/pmu_event_filter_test.c | 2 +-
6 files changed, 67 insertions(+), 126 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index 39e1971e5d65..1ccb91103e74 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -103,8 +103,6 @@ extern const struct vm_guest_mode_params vm_guest_mode_params[];
int open_path_or_exit(const char *path, int flags);
int open_kvm_dev_path_or_exit(void);
int kvm_check_cap(long cap);
-int vm_check_cap(struct kvm_vm *vm, long cap);
-int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);

#define __KVM_SYSCALL_ERROR(_name, _ret) \
"%s failed, rc: %i errno: %i (%s)", (_name), (_ret), errno, strerror(errno)
@@ -126,6 +124,23 @@ void _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long cmd,
#define vcpu_ioctl(vm, vcpuid, cmd, arg) \
_vcpu_ioctl(vm, vcpuid, cmd, #cmd, arg)

+/*
+ * Looks up and returns the value corresponding to the capability
+ * (KVM_CAP_*) given by cap.
+ */
+static inline int vm_check_cap(struct kvm_vm *vm, long cap)
+{
+ int ret = __vm_ioctl(vm, KVM_CHECK_EXTENSION, (void *)cap);
+
+ TEST_ASSERT(ret >= 0, KVM_IOCTL_ERROR(KVM_CHECK_EXTENSION, ret));
+ return ret;
+}
+
+static inline void vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap)
+{
+ vm_ioctl(vm, KVM_ENABLE_CAP, cap);
+}
+
void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size);
const char *vm_guest_mode_string(uint32_t i);

@@ -134,19 +149,46 @@ struct kvm_vm *vm_create(uint64_t phy_pages);
void kvm_vm_free(struct kvm_vm *vmp);
void kvm_vm_restart(struct kvm_vm *vmp);
void kvm_vm_release(struct kvm_vm *vmp);
-void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log);
-void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log,
- uint64_t first_page, uint32_t num_pages);
-uint32_t kvm_vm_reset_dirty_ring(struct kvm_vm *vm);
-
int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, const vm_vaddr_t gva,
size_t len);
-
void kvm_vm_elf_load(struct kvm_vm *vm, const char *filename);
int kvm_memfd_alloc(size_t size, bool hugepages);

void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent);

+static inline void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log)
+{
+ struct kvm_dirty_log args = { .dirty_bitmap = log, .slot = slot };
+
+ vm_ioctl(vm, KVM_GET_DIRTY_LOG, &args);
+}
+
+static inline void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log,
+ uint64_t first_page, uint32_t num_pages)
+{
+ struct kvm_clear_dirty_log args = {
+ .dirty_bitmap = log,
+ .slot = slot,
+ .first_page = first_page,
+ .num_pages = num_pages
+ };
+
+ vm_ioctl(vm, KVM_CLEAR_DIRTY_LOG, &args);
+}
+
+static inline uint32_t kvm_vm_reset_dirty_ring(struct kvm_vm *vm)
+{
+ return __vm_ioctl(vm, KVM_RESET_DIRTY_RINGS, NULL);
+}
+
+static inline int vm_get_stats_fd(struct kvm_vm *vm)
+{
+ int fd = __vm_ioctl(vm, KVM_GET_STATS_FD, NULL);
+
+ TEST_ASSERT(fd >= 0, KVM_IOCTL_ERROR(KVM_GET_STATS_FD, fd));
+ return fd;
+}
+
/*
* VM VCPU Dump
*
@@ -483,8 +525,6 @@ kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,

void assert_on_unhandled_exception(struct kvm_vm *vm, uint32_t vcpuid);

-int vm_get_stats_fd(struct kvm_vm *vm);
-
uint32_t guest_get_vcpuid(void);

#endif /* SELFTEST_KVM_UTIL_BASE_H */
diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
index bab8b49b52da..0a27b0f85009 100644
--- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
+++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
@@ -165,11 +165,7 @@ static void stats_test(int stats_fd)

static void vm_stats_test(struct kvm_vm *vm)
{
- int stats_fd;
-
- /* Get fd for VM stats */
- stats_fd = vm_get_stats_fd(vm);
- TEST_ASSERT(stats_fd >= 0, "Get VM stats fd");
+ int stats_fd = vm_get_stats_fd(vm);

stats_test(stats_fd);
close(stats_fd);
diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c
index 5d45046c1b80..25d1ec65621d 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/vgic.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c
@@ -104,8 +104,7 @@ void kvm_irq_set_level_info(int gic_fd, uint32_t intid, int level)
{
int ret = _kvm_irq_set_level_info(gic_fd, intid, level);

- TEST_ASSERT(ret == 0, "KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO failed, "
- "rc: %i errno: %i", ret, errno);
+ TEST_ASSERT(!ret, KVM_IOCTL_ERROR(KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO, ret));
}

int _kvm_arm_irq_line(struct kvm_vm *vm, uint32_t intid, int level)
@@ -127,8 +126,7 @@ void kvm_arm_irq_line(struct kvm_vm *vm, uint32_t intid, int level)
{
int ret = _kvm_arm_irq_line(vm, intid, level);

- TEST_ASSERT(ret == 0, "KVM_IRQ_LINE failed, rc: %i errno: %i",
- ret, errno);
+ TEST_ASSERT(!ret, KVM_IOCTL_ERROR(KVM_IRQ_LINE, ret));
}

static void vgic_poke_irq(int gic_fd, uint32_t intid,
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 7eedd9ff20fa..339d524a0399 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -85,56 +85,6 @@ int kvm_check_cap(long cap)
return ret;
}

-/* VM Check Capability
- *
- * Input Args:
- * vm - Virtual Machine
- * cap - Capability
- *
- * Output Args: None
- *
- * Return:
- * On success, the Value corresponding to the capability (KVM_CAP_*)
- * specified by the value of cap. On failure a TEST_ASSERT failure
- * is produced.
- *
- * Looks up and returns the value corresponding to the capability
- * (KVM_CAP_*) given by cap.
- */
-int vm_check_cap(struct kvm_vm *vm, long cap)
-{
- int ret;
-
- ret = ioctl(vm->fd, KVM_CHECK_EXTENSION, cap);
- TEST_ASSERT(ret >= 0, "KVM_CHECK_EXTENSION VM IOCTL failed,\n"
- " rc: %i errno: %i", ret, errno);
-
- return ret;
-}
-
-/* VM Enable Capability
- *
- * Input Args:
- * vm - Virtual Machine
- * cap - Capability
- *
- * Output Args: None
- *
- * Return: On success, 0. On failure a TEST_ASSERT failure is produced.
- *
- * Enables a capability (KVM_CAP_*) on the VM.
- */
-int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap)
-{
- int ret;
-
- ret = ioctl(vm->fd, KVM_ENABLE_CAP, cap);
- TEST_ASSERT(ret == 0, "KVM_ENABLE_CAP IOCTL failed,\n"
- " rc: %i errno: %i", ret, errno);
-
- return ret;
-}
-
void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size)
{
struct kvm_enable_cap cap = { 0 };
@@ -460,36 +410,6 @@ void kvm_vm_restart(struct kvm_vm *vmp)
}
}

-void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log)
-{
- struct kvm_dirty_log args = { .dirty_bitmap = log, .slot = slot };
- int ret;
-
- ret = ioctl(vm->fd, KVM_GET_DIRTY_LOG, &args);
- TEST_ASSERT(ret == 0, "%s: KVM_GET_DIRTY_LOG failed: %s",
- __func__, strerror(-ret));
-}
-
-void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log,
- uint64_t first_page, uint32_t num_pages)
-{
- struct kvm_clear_dirty_log args = {
- .dirty_bitmap = log, .slot = slot,
- .first_page = first_page,
- .num_pages = num_pages
- };
- int ret;
-
- ret = ioctl(vm->fd, KVM_CLEAR_DIRTY_LOG, &args);
- TEST_ASSERT(ret == 0, "%s: KVM_CLEAR_DIRTY_LOG failed: %s",
- __func__, strerror(-ret));
-}
-
-uint32_t kvm_vm_reset_dirty_ring(struct kvm_vm *vm)
-{
- return ioctl(vm->fd, KVM_RESET_DIRTY_RINGS);
-}
-
/*
* Userspace Memory Region Find
*
@@ -645,9 +565,7 @@ static void __vm_mem_region_delete(struct kvm_vm *vm,
}

region->region.memory_size = 0;
- ret = ioctl(vm->fd, KVM_SET_USER_MEMORY_REGION, &region->region);
- TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION IOCTL failed, "
- "rc: %i errno: %i", ret, errno);
+ vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION, &region->region);

sparsebit_free(&region->unused_phy_pages);
ret = munmap(region->mmap_start, region->mmap_size);
@@ -993,7 +911,7 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
region->region.guest_phys_addr = guest_paddr;
region->region.memory_size = npages * vm->page_size;
region->region.userspace_addr = (uintptr_t) region->host_mem;
- ret = ioctl(vm->fd, KVM_SET_USER_MEMORY_REGION, &region->region);
+ ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION, &region->region);
TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION IOCTL failed,\n"
" rc: %i errno: %i\n"
" slot: %u flags: 0x%x\n"
@@ -1076,7 +994,7 @@ void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags)

region->region.flags = flags;

- ret = ioctl(vm->fd, KVM_SET_USER_MEMORY_REGION, &region->region);
+ ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION, &region->region);

TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION IOCTL failed,\n"
" rc: %i errno: %i slot: %u flags: 0x%x",
@@ -1106,7 +1024,7 @@ void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa)

region->region.guest_phys_addr = new_gpa;

- ret = ioctl(vm->fd, KVM_SET_USER_MEMORY_REGION, &region->region);
+ ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION, &region->region);

TEST_ASSERT(!ret, "KVM_SET_USER_MEMORY_REGION failed\n"
"ret: %i errno: %i slot: %u new_gpa: 0x%lx",
@@ -1190,10 +1108,10 @@ void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid)
/* Allocate and initialize new vcpu structure. */
vcpu = calloc(1, sizeof(*vcpu));
TEST_ASSERT(vcpu != NULL, "Insufficient Memory");
+
vcpu->id = vcpuid;
- vcpu->fd = ioctl(vm->fd, KVM_CREATE_VCPU, vcpuid);
- TEST_ASSERT(vcpu->fd >= 0, "KVM_CREATE_VCPU failed, rc: %i errno: %i",
- vcpu->fd, errno);
+ vcpu->fd = __vm_ioctl(vm, KVM_CREATE_VCPU, (void *)(unsigned long)vcpuid);
+ TEST_ASSERT(vcpu->fd >= 0, KVM_IOCTL_ERROR(KVM_CREATE_VCPU, vcpu->fd));

TEST_ASSERT(vcpu_mmap_sz() >= sizeof(*vcpu->state), "vcpu mmap size "
"smaller than expected, vcpu_mmap_sz: %i expected_min: %zi",
@@ -1534,11 +1452,7 @@ void *addr_gpa2alias(struct kvm_vm *vm, vm_paddr_t gpa)
*/
void vm_create_irqchip(struct kvm_vm *vm)
{
- int ret;
-
- ret = ioctl(vm->fd, KVM_CREATE_IRQCHIP, 0);
- TEST_ASSERT(ret == 0, "KVM_CREATE_IRQCHIP IOCTL failed, "
- "rc: %i errno: %i", ret, errno);
+ vm_ioctl(vm, KVM_CREATE_IRQCHIP, NULL);

vm->has_irqchip = true;
}
@@ -1759,7 +1673,7 @@ int _kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test, int *fd)
create_dev.type = type;
create_dev.fd = -1;
create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
- ret = ioctl(vm_get_fd(vm), KVM_CREATE_DEVICE, &create_dev);
+ ret = __vm_ioctl(vm, KVM_CREATE_DEVICE, &create_dev);
*fd = create_dev.fd;
return ret;
}
@@ -1855,7 +1769,7 @@ void kvm_irq_line(struct kvm_vm *vm, uint32_t irq, int level)
{
int ret = _kvm_irq_line(vm, irq, level);

- TEST_ASSERT(ret >= 0, "KVM_IRQ_LINE failed, rc: %i errno: %i", ret, errno);
+ TEST_ASSERT(ret >= 0, KVM_IOCTL_ERROR(KVM_IRQ_LINE, ret));
}

struct kvm_irq_routing *kvm_gsi_routing_create(void)
@@ -1894,7 +1808,7 @@ int _kvm_gsi_routing_write(struct kvm_vm *vm, struct kvm_irq_routing *routing)
int ret;

assert(routing);
- ret = ioctl(vm_get_fd(vm), KVM_SET_GSI_ROUTING, routing);
+ ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);
free(routing);

return ret;
@@ -1905,8 +1819,7 @@ void kvm_gsi_routing_write(struct kvm_vm *vm, struct kvm_irq_routing *routing)
int ret;

ret = _kvm_gsi_routing_write(vm, routing);
- TEST_ASSERT(ret == 0, "KVM_SET_GSI_ROUTING failed, rc: %i errno: %i",
- ret, errno);
+ TEST_ASSERT(!ret, KVM_IOCTL_ERROR(KVM_SET_GSI_ROUTING, ret));
}

/*
@@ -2205,8 +2118,3 @@ unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size)
n = DIV_ROUND_UP(size, vm_guest_mode_params[mode].page_size);
return vm_adjust_num_guest_pages(mode, n);
}
-
-int vm_get_stats_fd(struct kvm_vm *vm)
-{
- return ioctl(vm->fd, KVM_GET_STATS_FD, NULL);
-}
diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
index 89b13f23c3ac..e66deb8ba7e0 100644
--- a/tools/testing/selftests/kvm/set_memory_region_test.c
+++ b/tools/testing/selftests/kvm/set_memory_region_test.c
@@ -317,8 +317,7 @@ static void test_zero_memory_regions(void)
vm = vm_create(0);
vm_vcpu_add(vm, VCPU_ID);

- TEST_ASSERT(!ioctl(vm_get_fd(vm), KVM_SET_NR_MMU_PAGES, 64),
- "KVM_SET_NR_MMU_PAGES failed, errno = %d\n", errno);
+ vm_ioctl(vm, KVM_SET_NR_MMU_PAGES, (void *)64ul);
vcpu_run(vm, VCPU_ID);

run = vcpu_state(vm, VCPU_ID);
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
index 0d06ffa95d9d..269033af43ce 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
@@ -344,7 +344,7 @@ static void test_pmu_config_disable(void (*guest_code)(void))

cap.cap = KVM_CAP_PMU_CAPABILITY;
cap.args[0] = KVM_PMU_CAP_DISABLE;
- TEST_ASSERT(!vm_enable_cap(vm, &cap), "Failed to set KVM_PMU_CAP_DISABLE.");
+ vm_enable_cap(vm, &cap);

vm_vcpu_add_default(vm, VCPU_ID, guest_code);
vm_init_descriptor_tables(vm);
--
2.36.0.464.gb9c8b46e94-goog