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Message-Id: <20231123063750.2176250-2-shahuang@redhat.com>
Date: Thu, 23 Nov 2023 01:37:43 -0500
From: Shaoqin Huang <shahuang@...hat.com>
To: Oliver Upton <oliver.upton@...ux.dev>,
Marc Zyngier <maz@...nel.org>, kvmarm@...ts.linux.dev
Cc: Shaoqin Huang <shahuang@...hat.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Shuah Khan <shuah@...nel.org>,
James Morse <james.morse@....com>,
Suzuki K Poulose <suzuki.poulose@....com>,
Zenghui Yu <yuzenghui@...wei.com>,
linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
linux-kselftest@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v1 1/3] KVM: selftests: aarch64: Make the [create|destroy]_vpmu_vm() can be reused
Move the [create|destroy]_vpmu_vm() into the lib/, which makes those
function can be used by other tests. Install the handler is specific to
the vpmu_counter_access test, so create a wrapper function for it, and
only move the common part.
No functional change.
Signed-off-by: Shaoqin Huang <shahuang@...hat.com>
---
tools/testing/selftests/kvm/Makefile | 1 +
.../kvm/aarch64/vpmu_counter_access.c | 100 +++++-------------
.../selftests/kvm/include/aarch64/vpmu.h | 16 +++
.../testing/selftests/kvm/lib/aarch64/vpmu.c | 64 +++++++++++
4 files changed, 105 insertions(+), 76 deletions(-)
create mode 100644 tools/testing/selftests/kvm/include/aarch64/vpmu.h
create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vpmu.c
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index a5963ab9215b..b60852c222ac 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -57,6 +57,7 @@ LIBKVM_aarch64 += lib/aarch64/processor.c
LIBKVM_aarch64 += lib/aarch64/spinlock.c
LIBKVM_aarch64 += lib/aarch64/ucall.c
LIBKVM_aarch64 += lib/aarch64/vgic.c
+LIBKVM_aarch64 += lib/aarch64/vpmu.c
LIBKVM_s390x += lib/s390x/diag318_test_handler.c
LIBKVM_s390x += lib/s390x/processor.c
diff --git a/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c b/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c
index 5ea78986e665..17305408a334 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>
@@ -25,13 +26,7 @@
/* The cycle counter bit position that's common among the PMU registers */
#define ARMV8_PMU_CYCLE_IDX 31
-struct vpmu_vm {
- struct kvm_vm *vm;
- struct kvm_vcpu *vcpu;
- int gic_fd;
-};
-
-static struct vpmu_vm vpmu_vm;
+static struct vpmu_vm *vpmu_vm;
struct pmreg_sets {
uint64_t set_reg_id;
@@ -421,64 +416,6 @@ static void guest_code(uint64_t expected_pmcr_n)
GUEST_DONE();
}
-#define GICD_BASE_GPA 0x8000000ULL
-#define GICR_BASE_GPA 0x80A0000ULL
-
-/* 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,
- };
-
- /* The test creates the vpmu_vm multiple times. Ensure a clean state */
- memset(&vpmu_vm, 0, sizeof(vpmu_vm));
-
- vpmu_vm.vm = vm_create(1);
- vm_init_descriptor_tables(vpmu_vm.vm);
- for (ec = 0; ec < ESR_EC_NUM; ec++) {
- vm_install_sync_handler(vpmu_vm.vm, VECTOR_SYNC_CURRENT, ec,
- 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);
- vcpu_init_descriptor_tables(vpmu_vm.vcpu);
- vpmu_vm.gic_fd = vgic_v3_setup(vpmu_vm.vm, 1, 64,
- GICD_BASE_GPA, GICR_BASE_GPA);
- __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);
-}
-
-static void destroy_vpmu_vm(void)
-{
- close(vpmu_vm.gic_fd);
- kvm_vm_free(vpmu_vm.vm);
-}
-
static void run_vcpu(struct kvm_vcpu *vcpu, uint64_t pmcr_n)
{
struct ucall uc;
@@ -497,13 +434,24 @@ static void run_vcpu(struct kvm_vcpu *vcpu, uint64_t pmcr_n)
}
}
+static void create_vpmu_vm_with_handler(void *guest_code)
+{
+ uint8_t ec;
+ vpmu_vm = create_vpmu_vm(guest_code);
+
+ for (ec = 0; ec < ESR_EC_NUM; ec++) {
+ vm_install_sync_handler(vpmu_vm->vm, VECTOR_SYNC_CURRENT, ec,
+ guest_sync_handler);
+ }
+}
+
static void test_create_vpmu_vm_with_pmcr_n(uint64_t pmcr_n, bool expect_fail)
{
struct kvm_vcpu *vcpu;
uint64_t pmcr, pmcr_orig;
- create_vpmu_vm(guest_code);
- vcpu = vpmu_vm.vcpu;
+ create_vpmu_vm_with_handler(guest_code);
+ vcpu = vpmu_vm->vcpu;
vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_PMCR_EL0), &pmcr_orig);
pmcr = pmcr_orig;
@@ -539,7 +487,7 @@ static void run_access_test(uint64_t pmcr_n)
pr_debug("Test with pmcr_n %lu\n", pmcr_n);
test_create_vpmu_vm_with_pmcr_n(pmcr_n, false);
- vcpu = vpmu_vm.vcpu;
+ vcpu = vpmu_vm->vcpu;
/* Save the initial sp to restore them later to run the guest again */
vcpu_get_reg(vcpu, ARM64_CORE_REG(sp_el1), &sp);
@@ -550,7 +498,7 @@ static void run_access_test(uint64_t pmcr_n)
* Reset and re-initialize the vCPU, and run the guest code again to
* check if PMCR_EL0.N is preserved.
*/
- vm_ioctl(vpmu_vm.vm, KVM_ARM_PREFERRED_TARGET, &init);
+ vm_ioctl(vpmu_vm->vm, KVM_ARM_PREFERRED_TARGET, &init);
init.features[0] |= (1 << KVM_ARM_VCPU_PMU_V3);
aarch64_vcpu_setup(vcpu, &init);
vcpu_init_descriptor_tables(vcpu);
@@ -559,7 +507,7 @@ static void run_access_test(uint64_t pmcr_n)
run_vcpu(vcpu, pmcr_n);
- destroy_vpmu_vm();
+ destroy_vpmu_vm(vpmu_vm);
}
static struct pmreg_sets validity_check_reg_sets[] = {
@@ -580,7 +528,7 @@ static void run_pmregs_validity_test(uint64_t pmcr_n)
uint64_t valid_counters_mask, max_counters_mask;
test_create_vpmu_vm_with_pmcr_n(pmcr_n, false);
- vcpu = vpmu_vm.vcpu;
+ vcpu = vpmu_vm->vcpu;
valid_counters_mask = get_counters_mask(pmcr_n);
max_counters_mask = get_counters_mask(ARMV8_PMU_MAX_COUNTERS);
@@ -621,7 +569,7 @@ static void run_pmregs_validity_test(uint64_t pmcr_n)
KVM_ARM64_SYS_REG(clr_reg_id), reg_val);
}
- destroy_vpmu_vm();
+ destroy_vpmu_vm(vpmu_vm);
}
/*
@@ -634,7 +582,7 @@ static void run_error_test(uint64_t pmcr_n)
pr_debug("Error test with pmcr_n %lu (larger than the host)\n", pmcr_n);
test_create_vpmu_vm_with_pmcr_n(pmcr_n, true);
- destroy_vpmu_vm();
+ destroy_vpmu_vm(vpmu_vm);
}
/*
@@ -645,9 +593,9 @@ static uint64_t get_pmcr_n_limit(void)
{
uint64_t pmcr;
- create_vpmu_vm(guest_code);
- vcpu_get_reg(vpmu_vm.vcpu, KVM_ARM64_SYS_REG(SYS_PMCR_EL0), &pmcr);
- destroy_vpmu_vm();
+ create_vpmu_vm_with_handler(guest_code);
+ vcpu_get_reg(vpmu_vm->vcpu, KVM_ARM64_SYS_REG(SYS_PMCR_EL0), &pmcr);
+ destroy_vpmu_vm(vpmu_vm);
return get_pmcr_n(pmcr);
}
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..0a56183644ee
--- /dev/null
+++ b/tools/testing/selftests/kvm/include/aarch64/vpmu.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <kvm_util.h>
+
+#define GICD_BASE_GPA 0x8000000ULL
+#define GICR_BASE_GPA 0x80A0000ULL
+
+struct vpmu_vm {
+ struct kvm_vm *vm;
+ struct kvm_vcpu *vcpu;
+ int gic_fd;
+};
+
+struct vpmu_vm *create_vpmu_vm(void *guest_code);
+
+void destroy_vpmu_vm(struct vpmu_vm *vpmu_vm);
diff --git a/tools/testing/selftests/kvm/lib/aarch64/vpmu.c b/tools/testing/selftests/kvm/lib/aarch64/vpmu.c
new file mode 100644
index 000000000000..b3de8fdc555e
--- /dev/null
+++ b/tools/testing/selftests/kvm/lib/aarch64/vpmu.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <kvm_util.h>
+#include <processor.h>
+#include <test_util.h>
+#include <vgic.h>
+#include <vpmu.h>
+#include <perf/arm_pmuv3.h>
+
+/* Create a VM that has one vCPU with PMUv3 configured. */
+struct vpmu_vm *create_vpmu_vm(void *guest_code)
+{
+ struct kvm_vcpu_init init;
+ uint8_t pmuver;
+ 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,
+ };
+ struct vpmu_vm *vpmu_vm;
+
+ vpmu_vm = calloc(1, sizeof(*vpmu_vm));
+ TEST_ASSERT(vpmu_vm != NULL, "Insufficient Memory");
+ memset(vpmu_vm, 0, sizeof(vpmu_vm));
+
+ vpmu_vm->vm = vm_create(1);
+ vm_init_descriptor_tables(vpmu_vm->vm);
+
+ /* 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);
+ vcpu_init_descriptor_tables(vpmu_vm->vcpu);
+ vpmu_vm->gic_fd = vgic_v3_setup(vpmu_vm->vm, 1, 64,
+ GICD_BASE_GPA, GICR_BASE_GPA);
+ __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);
+
+ return vpmu_vm;
+}
+
+void destroy_vpmu_vm(struct vpmu_vm *vpmu_vm)
+{
+ close(vpmu_vm->gic_fd);
+ kvm_vm_free(vpmu_vm->vm);
+ free(vpmu_vm);
+}
--
2.40.1
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