[RFC PATCH 064/105] KVM: selftests: Convert amx_test away from VCPU_ID

Sean Christopherson
2022-03-11T05:59:15Z

tools/testing/selftests/kvm/x86_64/amx_test.c | 33 +++++++++----------
1 file changed, 16 insertions(+), 17 deletions(-)

diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index 89d2423a2ffd..cd5a71f5a7ac 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -25,7 +25,6 @@
# error This test is 64-bit only
#endif

-#define VCPU_ID 0
#define X86_FEATURE_XSAVE (1 << 26)
#define X86_FEATURE_OSXSAVE (1 << 27)

@@ -320,6 +319,7 @@ int main(int argc, char *argv[])
struct kvm_cpuid_entry2 *entry;
struct kvm_regs regs1, regs2;
bool amx_supported = false;
+ struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
struct kvm_run *run;
struct kvm_x86_state *state;
@@ -332,7 +332,7 @@ int main(int argc, char *argv[])
vm_xsave_req_perm(XSTATE_XTILE_DATA_BIT);

/* Create VM */
- vm = vm_create_default(VCPU_ID, 0, guest_code);
+ vm = vm_create_with_one_vcpu(&vcpu, guest_code);

entry = kvm_get_supported_cpuid_entry(1);
if (!(entry->ecx & X86_FEATURE_XSAVE)) {
@@ -351,12 +351,12 @@ int main(int argc, char *argv[])
xsave_restore_size = entry->ecx;
}

- run = vcpu_state(vm, VCPU_ID);
- vcpu_regs_get(vm, VCPU_ID, &regs1);
+ run = vcpu->run;
+ vcpu_regs_get(vm, vcpu->id, &regs1);

/* Register #NM handler */
vm_init_descriptor_tables(vm);
- vcpu_init_descriptor_tables(vm, VCPU_ID);
+ vcpu_init_descriptor_tables(vm, vcpu->id);
vm_install_exception_handler(vm, NM_VECTOR, guest_nm_handler);

/* amx cfg for guest_code */
@@ -370,16 +370,16 @@ int main(int argc, char *argv[])
/* xsave data for guest_code */
xsavedata = vm_vaddr_alloc_pages(vm, 3);
memset(addr_gva2hva(vm, xsavedata), 0, 3 * getpagesize());
- vcpu_args_set(vm, VCPU_ID, 3, amx_cfg, tiledata, xsavedata);
+ vcpu_args_set(vm, vcpu->id, 3, amx_cfg, tiledata, xsavedata);

for (stage = 1; ; stage++) {
- _vcpu_run(vm, VCPU_ID);
+ vcpu_run(vm, vcpu->id);
TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
"Stage %d: unexpected exit reason: %u (%s),\n",
stage, run->exit_reason,
exit_reason_str(run->exit_reason));

- switch (get_ucall(vm, VCPU_ID, &uc)) {
+ switch (get_ucall(vm, vcpu->id, &uc)) {
case UCALL_ABORT:
TEST_FAIL("%s at %s:%ld", (const char *)uc.args[0],
__FILE__, uc.args[1]);
@@ -404,7 +404,7 @@ int main(int argc, char *argv[])
* size subtract 8K amx size.
*/
amx_offset = xsave_restore_size - NUM_TILES*TILE_SIZE;
- state = vcpu_save_state(vm, VCPU_ID);
+ state = vcpu_save_state(vm, vcpu->id);
void *amx_start = (void *)state->xsave + amx_offset;
void *tiles_data = (void *)addr_gva2hva(vm, tiledata);
/* Only check TMM0 register, 1 tile */
@@ -425,22 +425,21 @@ int main(int argc, char *argv[])
TEST_FAIL("Unknown ucall %lu", uc.cmd);
}

- state = vcpu_save_state(vm, VCPU_ID);
+ state = vcpu_save_state(vm, vcpu->id);
memset(&regs1, 0, sizeof(regs1));
- vcpu_regs_get(vm, VCPU_ID, &regs1);
+ vcpu_regs_get(vm, vcpu->id, &regs1);

kvm_vm_release(vm);

/* Restore state in a new VM. */
- kvm_vm_restart(vm);
- vm_vcpu_add(vm, VCPU_ID);
- vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
- vcpu_load_state(vm, VCPU_ID, state);
- run = vcpu_state(vm, VCPU_ID);
+ vcpu = vm_recreate_with_one_vcpu(vm);
+ vcpu_set_cpuid(vm, vcpu->id, kvm_get_supported_cpuid());
+ vcpu_load_state(vm, vcpu->id, state);
+ run = vcpu->run;
kvm_x86_state_cleanup(state);

memset(&regs2, 0, sizeof(regs2));
- vcpu_regs_get(vm, VCPU_ID, &regs2);
+ vcpu_regs_get(vm, vcpu->id, &regs2);
TEST_ASSERT(!memcmp(&regs1, &regs2, sizeof(regs2)),
"Unexpected register values after vcpu_load_state; rdi: %lx rsi: %lx",
(ulong) regs2.rdi, (ulong) regs2.rsi);
--
2.35.1.723.g4982287a31-goog