From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Update tests to reflect new CPUID capabilities with SYNDBG.
Check that we get the right number of entries and that
0x40000000.EAX always returns the correct max leaf.
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Signed-off-by: Jon Doron <arilou@xxxxxxxxx>
---
.../selftests/kvm/x86_64/hyperv_cpuid.c | 103 ++++++++++--------
1 file changed, 56 insertions(+), 47 deletions(-)
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
index 83323f3d7ca0..4a7967cca281 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
@@ -26,18 +26,18 @@ static void guest_code(void)
{
}
-static int smt_possible(void)
+static bool smt_possible(void)
{
char buf[16];
FILE *f;
- bool res = 1;
+ bool res = true;
f = fopen("/sys/devices/system/cpu/smt/control", "r");
if (f) {
if (fread(buf, sizeof(*buf), sizeof(buf), f) > 0) {
if (!strncmp(buf, "forceoff", 8) ||
!strncmp(buf, "notsupported", 12))
- res = 0;
+ res = false;
}
fclose(f);
}
@@ -46,29 +46,31 @@ static int smt_possible(void)
}
static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries,
- int evmcs_enabled)
+ bool evmcs_enabled)
{
int i;
+ int nent = 9;
+ u32 test_val;
- if (!evmcs_enabled)
- TEST_ASSERT(hv_cpuid_entries->nent == 6,
- "KVM_GET_SUPPORTED_HV_CPUID should return 6 entries"
- " when Enlightened VMCS is disabled (returned %d)",
- hv_cpuid_entries->nent);
- else
- TEST_ASSERT(hv_cpuid_entries->nent == 7,
- "KVM_GET_SUPPORTED_HV_CPUID should return 7 entries"
- " when Enlightened VMCS is enabled (returned %d)",
- hv_cpuid_entries->nent);
+ if (evmcs_enabled)
+ nent += 1; /* 0x4000000A */
+
+ TEST_ASSERT(hv_cpuid_entries->nent == nent,
+ "KVM_GET_SUPPORTED_HV_CPUID should return %d entries"
+ " with evmcs=%d (returned %d)",
+ nent, evmcs_enabled, hv_cpuid_entries->nent);
for (i = 0; i < hv_cpuid_entries->nent; i++) {
struct kvm_cpuid_entry2 *entry = &hv_cpuid_entries->entries[i];
TEST_ASSERT((entry->function >= 0x40000000) &&
- (entry->function <= 0x4000000A),
+ (entry->function <= 0x40000082),
"function %x is our of supported range",
entry->function);
+ TEST_ASSERT(evmcs_enabled || (entry->function != 0x4000000A),
+ "0x4000000A leaf should not be reported");
+
TEST_ASSERT(entry->index == 0,
".index field should be zero");
@@ -78,12 +80,23 @@ static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries,
TEST_ASSERT(!entry->padding[0] && !entry->padding[1] &&
!entry->padding[2], "padding should be zero");
- if (entry->function == 0x40000004) {
- int nononarchcs = !!(entry->eax & (1UL << 18));
+ switch (entry->function) {
+ case 0x40000000:
+ test_val = 0x40000082;
- TEST_ASSERT(nononarchcs == !smt_possible(),
+ TEST_ASSERT(entry->eax == test_val,
+ "Wrong max leaf report in 0x40000000.EAX: %x"
+ " (evmcs=%d)",
+ entry->eax, evmcs_enabled
+ );
+ break;
+ case 0x40000004:
+ test_val = entry->eax & (1UL << 18);
+
+ TEST_ASSERT(!!test_val == !smt_possible(),
"NoNonArchitecturalCoreSharing bit"
" doesn't reflect SMT setting");
+ break;
}
/*
@@ -133,8 +146,9 @@ struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(struct kvm_vm *vm)
int main(int argc, char *argv[])
{
struct kvm_vm *vm;
- int rv;
+ int rv, stage;
struct kvm_cpuid2 *hv_cpuid_entries;
+ bool evmcs_enabled;
/* Tell stdout not to buffer its content */
setbuf(stdout, NULL);
@@ -145,36 +159,31 @@ int main(int argc, char *argv[])
exit(KSFT_SKIP);
}
- /* Create VM */
- vm = vm_create_default(VCPU_ID, 0, guest_code);
-
- test_hv_cpuid_e2big(vm);
-
- hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm);
- if (!hv_cpuid_entries)
- return 1;
-
- test_hv_cpuid(hv_cpuid_entries, 0);
-
- free(hv_cpuid_entries);
+ for (stage = 0; stage < 3; stage++) {
+ evmcs_enabled = false;
+
+ vm = vm_create_default(VCPU_ID, 0, guest_code);
+ switch (stage) {
+ case 0:
+ test_hv_cpuid_e2big(vm);
+ continue;
+ case 1:
+ break;
+ case 2:
+ if (!kvm_check_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) {
+ print_skip("Enlightened VMCS is unsupported");
+ continue;
+ }
+ vcpu_enable_evmcs(vm, VCPU_ID);
+ evmcs_enabled = true;
+ break;
+ }
- if (!kvm_check_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) {
- print_skip("Enlightened VMCS is unsupported");
- goto vm_free;
+ hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm);
+ test_hv_cpuid(hv_cpuid_entries, evmcs_enabled);
+ free(hv_cpuid_entries);
+ kvm_vm_free(vm);
}
- vcpu_enable_evmcs(vm, VCPU_ID);
-
- hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm);
- if (!hv_cpuid_entries)
- return 1;
-
- test_hv_cpuid(hv_cpuid_entries, 1);
-
- free(hv_cpuid_entries);
-
-vm_free:
- kvm_vm_free(vm);
-
return 0;
}
--
2.24.1
