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Commit 99801604 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
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KVM: selftests: Convert steal_time away from VCPU_ID 

Convert steal_time to use vm_create_with_vcpus() and pass around a
'struct kvm_vcpu' object instead of requiring that the index into the
array of vCPUs for a given vCPU is also the ID of the vCPU.
Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 0ffc70ea
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Inline Side-by-side
Showing with 62 additions and 61 deletions
tools/testing/selftests/kvm/steal_time.c
View file @ 99801604
......@@ -58,36 +58,34 @@ static void guest_code(int cpu)
GUEST_DONE();
}
static void steal_time_init(struct kvm_vm *vm)
static bool is_steal_time_supported(struct kvm_vcpu *vcpu)
{
int i;
struct kvm_cpuid_entry2 *cpuid = kvm_get_supported_cpuid_entry(KVM_CPUID_FEATURES);
if (!(kvm_get_supported_cpuid_entry(KVM_CPUID_FEATURES)->eax &
KVM_FEATURE_STEAL_TIME)) {
print_skip("steal-time not supported");
exit(KSFT_SKIP);
}
return cpuid && (cpuid->eax & KVM_FEATURE_STEAL_TIME);
}
for (i = 0; i < NR_VCPUS; ++i) {
int ret;
static void steal_time_init(struct kvm_vcpu *vcpu, uint32_t i)
{
int ret;
/* ST_GPA_BASE is identity mapped */
st_gva[i] = (void *)(ST_GPA_BASE + i * STEAL_TIME_SIZE);
sync_global_to_guest(vm, st_gva[i]);
/* ST_GPA_BASE is identity mapped */
st_gva[i] = (void *)(ST_GPA_BASE + i * STEAL_TIME_SIZE);
sync_global_to_guest(vcpu->vm, st_gva[i]);
ret = _vcpu_set_msr(vm, i, MSR_KVM_STEAL_TIME, (ulong)st_gva[i] | KVM_STEAL_RESERVED_MASK);
TEST_ASSERT(ret == 0, "Bad GPA didn't fail");
ret = _vcpu_set_msr(vcpu->vm, vcpu->id, MSR_KVM_STEAL_TIME,
(ulong)st_gva[i] | KVM_STEAL_RESERVED_MASK);
TEST_ASSERT(ret == 0, "Bad GPA didn't fail");
vcpu_set_msr(vm, i, MSR_KVM_STEAL_TIME, (ulong)st_gva[i] | KVM_MSR_ENABLED);
}
vcpu_set_msr(vcpu->vm, vcpu->id, MSR_KVM_STEAL_TIME, (ulong)st_gva[i] | KVM_MSR_ENABLED);
}
static void steal_time_dump(struct kvm_vm *vm, uint32_t vcpuid)
static void steal_time_dump(struct kvm_vm *vm, uint32_t vcpu_idx)
{
struct kvm_steal_time *st = addr_gva2hva(vm, (ulong)st_gva[vcpuid]);
struct kvm_steal_time *st = addr_gva2hva(vm, (ulong)st_gva[vcpu_idx]);
int i;
pr_info("VCPU%d:\n", vcpuid);
pr_info("VCPU%d:\n", vcpu_idx);
pr_info(" steal: %lld\n", st->steal);
pr_info(" version: %d\n", st->version);
pr_info(" flags: %d\n", st->flags);
......@@ -158,49 +156,50 @@ static void guest_code(int cpu)
GUEST_DONE();
}
static void steal_time_init(struct kvm_vm *vm)
static bool is_steal_time_supported(struct kvm_vcpu *vcpu)
{
struct kvm_device_attr dev = {
.group = KVM_ARM_VCPU_PVTIME_CTRL,
.attr = KVM_ARM_VCPU_PVTIME_IPA,
};
int i, ret;
ret = __vcpu_ioctl(vm, 0, KVM_HAS_DEVICE_ATTR, &dev);
if (ret != 0 && errno == ENXIO) {
print_skip("steal-time not supported");
exit(KSFT_SKIP);
}
for (i = 0; i < NR_VCPUS; ++i) {
uint64_t st_ipa;
return !__vcpu_ioctl(vcpu->vm, vcpu->id, KVM_HAS_DEVICE_ATTR, &dev);
}
vcpu_ioctl(vm, i, KVM_HAS_DEVICE_ATTR, &dev);
static void steal_time_init(struct kvm_vcpu *vcpu, uint32_t i)
{
struct kvm_vm *vm = vcpu->vm;
uint64_t st_ipa;
int ret;
dev.addr = (uint64_t)&st_ipa;
struct kvm_device_attr dev = {
.group = KVM_ARM_VCPU_PVTIME_CTRL,
.attr = KVM_ARM_VCPU_PVTIME_IPA,
.addr = (uint64_t)&st_ipa,
};
/* ST_GPA_BASE is identity mapped */
st_gva[i] = (void *)(ST_GPA_BASE + i * STEAL_TIME_SIZE);
sync_global_to_guest(vm, st_gva[i]);
vcpu_ioctl(vm, vcpu->id, KVM_HAS_DEVICE_ATTR, &dev);
st_ipa = (ulong)st_gva[i] | 1;
ret = __vcpu_ioctl(vm, i, KVM_SET_DEVICE_ATTR, &dev);
TEST_ASSERT(ret == -1 && errno == EINVAL, "Bad IPA didn't report EINVAL");
/* ST_GPA_BASE is identity mapped */
st_gva[i] = (void *)(ST_GPA_BASE + i * STEAL_TIME_SIZE);
sync_global_to_guest(vm, st_gva[i]);
st_ipa = (ulong)st_gva[i];
vcpu_ioctl(vm, i, KVM_SET_DEVICE_ATTR, &dev);
st_ipa = (ulong)st_gva[i] | 1;
ret = __vcpu_ioctl(vm, vcpu->id, KVM_SET_DEVICE_ATTR, &dev);
TEST_ASSERT(ret == -1 && errno == EINVAL, "Bad IPA didn't report EINVAL");
ret = __vcpu_ioctl(vm, i, KVM_SET_DEVICE_ATTR, &dev);
TEST_ASSERT(ret == -1 && errno == EEXIST, "Set IPA twice without EEXIST");
st_ipa = (ulong)st_gva[i];
vcpu_ioctl(vm, vcpu->id, KVM_SET_DEVICE_ATTR, &dev);
}
ret = __vcpu_ioctl(vm, vcpu->id, KVM_SET_DEVICE_ATTR, &dev);
TEST_ASSERT(ret == -1 && errno == EEXIST, "Set IPA twice without EEXIST");
}
static void steal_time_dump(struct kvm_vm *vm, uint32_t vcpuid)
static void steal_time_dump(struct kvm_vm *vm, uint32_t vcpu_idx)
{
struct st_time *st = addr_gva2hva(vm, (ulong)st_gva[vcpuid]);
struct st_time *st = addr_gva2hva(vm, (ulong)st_gva[vcpu_idx]);
pr_info("VCPU%d:\n", vcpuid);
pr_info("VCPU%d:\n", vcpu_idx);
pr_info(" rev: %d\n", st->rev);
pr_info(" attr: %d\n", st->attr);
pr_info(" st_time: %ld\n", st->st_time);
......@@ -224,15 +223,13 @@ static void *do_steal_time(void *arg)
return NULL;
}
static void run_vcpu(struct kvm_vm *vm, uint32_t vcpuid)
static void run_vcpu(struct kvm_vcpu *vcpu)
{
struct ucall uc;
vcpu_args_set(vm, vcpuid, 1, vcpuid);
vcpu_ioctl(vm, vcpuid, KVM_RUN, NULL);
vcpu_run(vcpu->vm, vcpu->id);
switch (get_ucall(vm, vcpuid, &uc)) {
switch (get_ucall(vcpu->vm, vcpu->id, &uc)) {
case UCALL_SYNC:
case UCALL_DONE:
break;
......@@ -241,12 +238,13 @@ static void run_vcpu(struct kvm_vm *vm, uint32_t vcpuid)
__FILE__, uc.args[1]);
default:
TEST_ASSERT(false, "Unexpected exit: %s",
exit_reason_str(vcpu_state(vm, vcpuid)->exit_reason));
exit_reason_str(vcpu->run->exit_reason));
}
}
int main(int ac, char **av)
{
struct kvm_vcpu *vcpus[NR_VCPUS];
struct kvm_vm *vm;
pthread_attr_t attr;
pthread_t thread;
......@@ -266,26 +264,29 @@ int main(int ac, char **av)
pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &cpuset);
pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
/* Create a one VCPU guest and an identity mapped memslot for the steal time structure */
vm = vm_create_default(0, 0, guest_code);
/* Create a VM and an identity mapped memslot for the steal time structure */
vm = vm_create_with_vcpus(NR_VCPUS, guest_code, vcpus);
gpages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, STEAL_TIME_SIZE * NR_VCPUS);
vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, ST_GPA_BASE, 1, gpages, 0);
virt_map(vm, ST_GPA_BASE, ST_GPA_BASE, gpages);
ucall_init(vm, NULL);
/* Add the rest of the VCPUs */
for (i = 1; i < NR_VCPUS; ++i)
vm_vcpu_add(vm, i, guest_code);
steal_time_init(vm);
if (!is_steal_time_supported(vcpus[0])) {
print_skip("steal-time not supported");
exit(KSFT_SKIP);
}
/* Run test on each VCPU */
for (i = 0; i < NR_VCPUS; ++i) {
steal_time_init(vcpus[i], i);
vcpu_args_set(vm, vcpus[i]->id, 1, i);
/* First VCPU run initializes steal-time */
run_vcpu(vm, i);
run_vcpu(vcpus[i]);
/* Second VCPU run, expect guest stolen time to be <= run_delay */
run_vcpu(vm, i);
run_vcpu(vcpus[i]);
sync_global_from_guest(vm, guest_stolen_time[i]);
stolen_time = guest_stolen_time[i];
run_delay = get_run_delay();
......@@ -306,7 +307,7 @@ int main(int ac, char **av)
MIN_RUN_DELAY_NS, run_delay);
/* Run VCPU again to confirm stolen time is consistent with run_delay */
run_vcpu(vm, i);
run_vcpu(vcpus[i]);
sync_global_from_guest(vm, guest_stolen_time[i]);
stolen_time = guest_stolen_time[i] - stolen_time;
TEST_ASSERT(stolen_time >= run_delay,
......
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