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KVM: selftests: Make a generic helper to get vm guest mode strings 

For generality and conciseness, make an API which can be used in all
kvm libs and selftests to get vm guest mode strings. And the index i
is checked in the API in case of possiable faults.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-Id: <20210330080856.14940-6-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Yanan Wang 2021-03-30 16:08:51 +08:00 коммит произвёл Paolo Bonzini
Родитель c412d6ac28
Коммит 6436430e29
2 изменённых файлов: 19 добавлений и 14 удалений
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4
tools/testing/selftests/kvm/include/kvm_util.h
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@ -68,9 +68,6 @@ enum vm_guest_mode {
#define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT)
#define PTES_PER_MIN_PAGE ptes_per_page(MIN_PAGE_SIZE)
#define vm_guest_mode_string(m) vm_guest_mode_string[m]
extern const char * const vm_guest_mode_string[];
struct vm_guest_mode_params {
unsigned int pa_bits;
unsigned int va_bits;
@ -84,6 +81,7 @@ int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);
int vcpu_enable_cap(struct kvm_vm *vm, uint32_t vcpu_id,
struct 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);
struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
void kvm_vm_free(struct kvm_vm *vmp);

29
tools/testing/selftests/kvm/lib/kvm_util.c
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@ -143,17 +143,24 @@ static void vm_open(struct kvm_vm *vm, int perm)
"rc: %i errno: %i", vm->fd, errno);
}
const char * const vm_guest_mode_string[] = {
"PA-bits:52, VA-bits:48, 4K pages",
"PA-bits:52, VA-bits:48, 64K pages",
"PA-bits:48, VA-bits:48, 4K pages",
"PA-bits:48, VA-bits:48, 64K pages",
"PA-bits:40, VA-bits:48, 4K pages",
"PA-bits:40, VA-bits:48, 64K pages",
"PA-bits:ANY, VA-bits:48, 4K pages",
};
_Static_assert(sizeof(vm_guest_mode_string)/sizeof(char *) == NUM_VM_MODES,
"Missing new mode strings?");
const char *vm_guest_mode_string(uint32_t i)
{
static const char * const strings[] = {
[VM_MODE_P52V48_4K] = "PA-bits:52, VA-bits:48, 4K pages",
[VM_MODE_P52V48_64K] = "PA-bits:52, VA-bits:48, 64K pages",
[VM_MODE_P48V48_4K] = "PA-bits:48, VA-bits:48, 4K pages",
[VM_MODE_P48V48_64K] = "PA-bits:48, VA-bits:48, 64K pages",
[VM_MODE_P40V48_4K] = "PA-bits:40, VA-bits:48, 4K pages",
[VM_MODE_P40V48_64K] = "PA-bits:40, VA-bits:48, 64K pages",
[VM_MODE_PXXV48_4K] = "PA-bits:ANY, VA-bits:48, 4K pages",
};
_Static_assert(sizeof(strings)/sizeof(char *) == NUM_VM_MODES,
"Missing new mode strings?");
TEST_ASSERT(i < NUM_VM_MODES, "Guest mode ID %d too big", i);
return strings[i];
}
const struct vm_guest_mode_params vm_guest_mode_params[] = {
{ 52, 48, 0x1000, 12 },