Create a vcpu with vpmu would be a common requirement for the vpmu test,
so add the helper function for the vpmu vcpu creation. And use those
helper function in the vpmu_counter_access.c test.
Use this chance to delete the meaningless ASSERT about the pmuver,
because KVM does not advertise an IMP_DEF PMU to guests.
No functional changes intended.
Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
Signed-off-by: Shaoqin Huang <shahuang@xxxxxxxxxx>
---
.../kvm/aarch64/vpmu_counter_access.c | 32 ++++---------------
.../selftests/kvm/include/aarch64/vpmu.h | 28 ++++++++++++++++
2 files changed, 34 insertions(+), 26 deletions(-)
create mode 100644 tools/testing/selftests/kvm/include/aarch64/vpmu.h
diff --git a/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c b/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c
index d31b9f64ba14..68da44198719 100644
--- a/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c
+++ b/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c
@@ -16,6 +16,7 @@
#include <processor.h>
#include <test_util.h>
#include <vgic.h>
+#include <vpmu.h>
#include <perf/arm_pmuv3.h>
#include <linux/bitfield.h>
@@ -407,18 +408,8 @@ static void guest_code(uint64_t expected_pmcr_n)
/* Create a VM that has one vCPU with PMUv3 configured. */
static void create_vpmu_vm(void *guest_code)
{
- struct kvm_vcpu_init init;
- uint8_t pmuver, ec;
- uint64_t dfr0, irq = 23;
- struct kvm_device_attr irq_attr = {
- .group = KVM_ARM_VCPU_PMU_V3_CTRL,
- .attr = KVM_ARM_VCPU_PMU_V3_IRQ,
- .addr = (uint64_t)&irq,
- };
- struct kvm_device_attr init_attr = {
- .group = KVM_ARM_VCPU_PMU_V3_CTRL,
- .attr = KVM_ARM_VCPU_PMU_V3_INIT,
- };
+ uint8_t ec;
+ uint64_t irq = 23;
/* The test creates the vpmu_vm multiple times. Ensure a clean state */
memset(&vpmu_vm, 0, sizeof(vpmu_vm));
@@ -430,26 +421,15 @@ static void create_vpmu_vm(void *guest_code)
guest_sync_handler);
}
- /* Create vCPU with PMUv3 */
- vm_ioctl(vpmu_vm.vm, KVM_ARM_PREFERRED_TARGET, &init);
- init.features[0] |= (1 << KVM_ARM_VCPU_PMU_V3);
- vpmu_vm.vcpu = aarch64_vcpu_add(vpmu_vm.vm, 0, &init, guest_code);
+ vpmu_vm.vcpu = vm_vcpu_add_with_vpmu(vpmu_vm.vm, 0, guest_code);
vcpu_init_descriptor_tables(vpmu_vm.vcpu);
vpmu_vm.gic_fd = vgic_v3_setup(vpmu_vm.vm, 1, 64);
__TEST_REQUIRE(vpmu_vm.gic_fd >= 0,
"Failed to create vgic-v3, skipping");
- /* Make sure that PMUv3 support is indicated in the ID register */
- vcpu_get_reg(vpmu_vm.vcpu,
- KVM_ARM64_SYS_REG(SYS_ID_AA64DFR0_EL1), &dfr0);
- pmuver = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64DFR0_EL1_PMUVer), dfr0);
- TEST_ASSERT(pmuver != ID_AA64DFR0_EL1_PMUVer_IMP_DEF &&
- pmuver >= ID_AA64DFR0_EL1_PMUVer_IMP,
- "Unexpected PMUVER (0x%x) on the vCPU with PMUv3", pmuver);
-
/* Initialize vPMU */
- vcpu_ioctl(vpmu_vm.vcpu, KVM_SET_DEVICE_ATTR, &irq_attr);
- vcpu_ioctl(vpmu_vm.vcpu, KVM_SET_DEVICE_ATTR, &init_attr);
+ vpmu_set_irq(vpmu_vm.vcpu, irq);
+ vpmu_init(vpmu_vm.vcpu);
}
static void destroy_vpmu_vm(void)
diff --git a/tools/testing/selftests/kvm/include/aarch64/vpmu.h b/tools/testing/selftests/kvm/include/aarch64/vpmu.h
new file mode 100644
index 000000000000..5ef6cb011e41
--- /dev/null
+++ b/tools/testing/selftests/kvm/include/aarch64/vpmu.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <kvm_util.h>
+
+static inline struct kvm_vcpu *vm_vcpu_add_with_vpmu(struct kvm_vm *vm,
+ uint32_t vcpu_id,
+ void *guest_code)
+{
+ struct kvm_vcpu_init init;
+
+ /* Create vCPU with PMUv3 */
+ vm_ioctl(vm, KVM_ARM_PREFERRED_TARGET, &init);
+ init.features[0] |= (1 << KVM_ARM_VCPU_PMU_V3);
+
+ return aarch64_vcpu_add(vm, 0, &init, guest_code);
+}
+
+static void vpmu_set_irq(struct kvm_vcpu *vcpu, int irq)
+{
+ kvm_device_attr_set(vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL,
+ KVM_ARM_VCPU_PMU_V3_IRQ, &irq);
+}
+
+static void vpmu_init(struct kvm_vcpu *vcpu)
+{
+ kvm_device_attr_set(vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL,
+ KVM_ARM_VCPU_PMU_V3_INIT, NULL);
+}
--
2.40.1
