From patchwork Tue Jan 16 06:01:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 13520461 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B11F810A1A for ; Tue, 16 Jan 2024 06:01:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="e5Qq/41x" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1705384898; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tqg7c9T7jiq+ZGShn5JqBvivigq2f42UVRdO/5im1Wc=; b=e5Qq/41xgN3833TCfqa7hYEMXAwXeFUy5fzhlO7kF9AvuaH4BIzrljFqTVnIZYUF8riWHd Rof9xzE9Fm6muSBkAAyScU3/WCqnpUoJLm2C5T3T9BYf7VGPEF4YeHyclvmliRqOOb/O9Z YklCL6VRyHce/bxaDnxXvLJpHv5UqqQ= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-271-qZgA-5W7NRi9d5vWdbsfEg-1; Tue, 16 Jan 2024 01:01:34 -0500 X-MC-Unique: qZgA-5W7NRi9d5vWdbsfEg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C7ABF185A781; Tue, 16 Jan 2024 06:01:33 +0000 (UTC) Received: from virt-mtcollins-01.lab.eng.rdu2.redhat.com (virt-mtcollins-01.lab.eng.rdu2.redhat.com [10.8.1.196]) by smtp.corp.redhat.com (Postfix) with ESMTP id B0DC72026D6F; Tue, 16 Jan 2024 06:01:33 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: Eric Auger , Shaoqin Huang , Eric Auger , Paolo Bonzini , Shuah Khan , James Morse , Suzuki K Poulose , Zenghui Yu , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/5] KVM: selftests: aarch64: Make the [create|destroy]_vpmu_vm() public Date: Tue, 16 Jan 2024 01:01:19 -0500 Message-Id: <20240116060129.55473-2-shahuang@redhat.com> In-Reply-To: <20240116060129.55473-1-shahuang@redhat.com> References: <20240116060129.55473-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Move the implementation of [create|destroy]_vpmu_vm() into lib/aarch64/pmu.c and export their declaration in a header so they can be reused by other tests. The sync exception handler install is test specific so we move it out of the helper function. No functional change intended. Reviewed-by: Eric Auger Signed-off-by: Shaoqin Huang --- 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 #include #include +#include #include #include @@ -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 + +#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 +#include +#include +#include +#include +#include + +/* 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); +} From patchwork Tue Jan 16 06:01:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 13520462 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB00110A22 for ; Tue, 16 Jan 2024 06:01:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="AN0gko4u" DKIM-Signature: v=1; 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Tue, 16 Jan 2024 06:01:34 +0000 (UTC) Received: from virt-mtcollins-01.lab.eng.rdu2.redhat.com (virt-mtcollins-01.lab.eng.rdu2.redhat.com [10.8.1.196]) by smtp.corp.redhat.com (Postfix) with ESMTP id 483A12026D6F; Tue, 16 Jan 2024 06:01:34 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: Eric Auger , Shaoqin Huang , Eric Auger , James Morse , Suzuki K Poulose , Zenghui Yu , Paolo Bonzini , Shuah Khan , linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/5] KVM: selftests: aarch64: Move pmu helper functions into vpmu.h Date: Tue, 16 Jan 2024 01:01:20 -0500 Message-Id: <20240116060129.55473-3-shahuang@redhat.com> In-Reply-To: <20240116060129.55473-1-shahuang@redhat.com> References: <20240116060129.55473-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Move those pmu helper functions into include/aarch64/vpmu.h, thus it can be used by other pmu test. No functional change intended. Reviewed-by: Eric Auger Signed-off-by: Shaoqin Huang --- .../kvm/aarch64/vpmu_counter_access.c | 118 ----------------- .../selftests/kvm/include/aarch64/vpmu.h | 119 ++++++++++++++++++ 2 files changed, 119 insertions(+), 118 deletions(-) diff --git a/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c b/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c index 17305408a334..62d6315790ab 100644 --- a/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c +++ b/tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c @@ -20,12 +20,6 @@ #include #include -/* The max number of the PMU event counters (excluding the cycle counter) */ -#define ARMV8_PMU_MAX_GENERAL_COUNTERS (ARMV8_PMU_MAX_COUNTERS - 1) - -/* The cycle counter bit position that's common among the PMU registers */ -#define ARMV8_PMU_CYCLE_IDX 31 - static struct vpmu_vm *vpmu_vm; struct pmreg_sets { @@ -35,118 +29,6 @@ struct pmreg_sets { #define PMREG_SET(set, clr) {.set_reg_id = set, .clr_reg_id = clr} -static uint64_t get_pmcr_n(uint64_t pmcr) -{ - return (pmcr >> ARMV8_PMU_PMCR_N_SHIFT) & ARMV8_PMU_PMCR_N_MASK; -} - -static void set_pmcr_n(uint64_t *pmcr, uint64_t pmcr_n) -{ - *pmcr = *pmcr & ~(ARMV8_PMU_PMCR_N_MASK << ARMV8_PMU_PMCR_N_SHIFT); - *pmcr |= (pmcr_n << ARMV8_PMU_PMCR_N_SHIFT); -} - -static uint64_t get_counters_mask(uint64_t n) -{ - uint64_t mask = BIT(ARMV8_PMU_CYCLE_IDX); - - if (n) - mask |= GENMASK(n - 1, 0); - return mask; -} - -/* Read PMEVTCNTR_EL0 through PMXEVCNTR_EL0 */ -static inline unsigned long read_sel_evcntr(int sel) -{ - write_sysreg(sel, pmselr_el0); - isb(); - return read_sysreg(pmxevcntr_el0); -} - -/* Write PMEVTCNTR_EL0 through PMXEVCNTR_EL0 */ -static inline void write_sel_evcntr(int sel, unsigned long val) -{ - write_sysreg(sel, pmselr_el0); - isb(); - write_sysreg(val, pmxevcntr_el0); - isb(); -} - -/* Read PMEVTYPER_EL0 through PMXEVTYPER_EL0 */ -static inline unsigned long read_sel_evtyper(int sel) -{ - write_sysreg(sel, pmselr_el0); - isb(); - return read_sysreg(pmxevtyper_el0); -} - -/* Write PMEVTYPER_EL0 through PMXEVTYPER_EL0 */ -static inline void write_sel_evtyper(int sel, unsigned long val) -{ - write_sysreg(sel, pmselr_el0); - isb(); - write_sysreg(val, pmxevtyper_el0); - isb(); -} - -static inline void enable_counter(int idx) -{ - uint64_t v = read_sysreg(pmcntenset_el0); - - write_sysreg(BIT(idx) | v, pmcntenset_el0); - isb(); -} - -static inline void disable_counter(int idx) -{ - uint64_t v = read_sysreg(pmcntenset_el0); - - write_sysreg(BIT(idx) | v, pmcntenclr_el0); - isb(); -} - -static void pmu_disable_reset(void) -{ - uint64_t pmcr = read_sysreg(pmcr_el0); - - /* Reset all counters, disabling them */ - pmcr &= ~ARMV8_PMU_PMCR_E; - write_sysreg(pmcr | ARMV8_PMU_PMCR_P, pmcr_el0); - isb(); -} - -#define RETURN_READ_PMEVCNTRN(n) \ - return read_sysreg(pmevcntr##n##_el0) -static unsigned long read_pmevcntrn(int n) -{ - PMEVN_SWITCH(n, RETURN_READ_PMEVCNTRN); - return 0; -} - -#define WRITE_PMEVCNTRN(n) \ - write_sysreg(val, pmevcntr##n##_el0) -static void write_pmevcntrn(int n, unsigned long val) -{ - PMEVN_SWITCH(n, WRITE_PMEVCNTRN); - isb(); -} - -#define READ_PMEVTYPERN(n) \ - return read_sysreg(pmevtyper##n##_el0) -static unsigned long read_pmevtypern(int n) -{ - PMEVN_SWITCH(n, READ_PMEVTYPERN); - return 0; -} - -#define WRITE_PMEVTYPERN(n) \ - write_sysreg(val, pmevtyper##n##_el0) -static void write_pmevtypern(int n, unsigned long val) -{ - PMEVN_SWITCH(n, WRITE_PMEVTYPERN); - isb(); -} - /* * The pmc_accessor structure has pointers to PMEV{CNTR,TYPER}_EL0 * accessors that test cases will use. Each of the accessors will diff --git a/tools/testing/selftests/kvm/include/aarch64/vpmu.h b/tools/testing/selftests/kvm/include/aarch64/vpmu.h index 0a56183644ee..e0cc1ca1c4b7 100644 --- a/tools/testing/selftests/kvm/include/aarch64/vpmu.h +++ b/tools/testing/selftests/kvm/include/aarch64/vpmu.h @@ -1,10 +1,17 @@ /* SPDX-License-Identifier: GPL-2.0 */ #include +#include #define GICD_BASE_GPA 0x8000000ULL #define GICR_BASE_GPA 0x80A0000ULL +/* The max number of the PMU event counters (excluding the cycle counter) */ +#define ARMV8_PMU_MAX_GENERAL_COUNTERS (ARMV8_PMU_MAX_COUNTERS - 1) + +/* 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; @@ -14,3 +21,115 @@ struct vpmu_vm { struct vpmu_vm *create_vpmu_vm(void *guest_code); void destroy_vpmu_vm(struct vpmu_vm *vpmu_vm); + +static inline uint64_t get_pmcr_n(uint64_t pmcr) +{ + return (pmcr >> ARMV8_PMU_PMCR_N_SHIFT) & ARMV8_PMU_PMCR_N_MASK; +} + +static inline void set_pmcr_n(uint64_t *pmcr, uint64_t pmcr_n) +{ + *pmcr = *pmcr & ~(ARMV8_PMU_PMCR_N_MASK << ARMV8_PMU_PMCR_N_SHIFT); + *pmcr |= (pmcr_n << ARMV8_PMU_PMCR_N_SHIFT); +} + +static inline uint64_t get_counters_mask(uint64_t n) +{ + uint64_t mask = BIT(ARMV8_PMU_CYCLE_IDX); + + if (n) + mask |= GENMASK(n - 1, 0); + return mask; +} + +/* Read PMEVTCNTR_EL0 through PMXEVCNTR_EL0 */ +static inline unsigned long read_sel_evcntr(int sel) +{ + write_sysreg(sel, pmselr_el0); + isb(); + return read_sysreg(pmxevcntr_el0); +} + +/* Write PMEVTCNTR_EL0 through PMXEVCNTR_EL0 */ +static inline void write_sel_evcntr(int sel, unsigned long val) +{ + write_sysreg(sel, pmselr_el0); + isb(); + write_sysreg(val, pmxevcntr_el0); + isb(); +} + +/* Read PMEVTYPER_EL0 through PMXEVTYPER_EL0 */ +static inline unsigned long read_sel_evtyper(int sel) +{ + write_sysreg(sel, pmselr_el0); + isb(); + return read_sysreg(pmxevtyper_el0); +} + +/* Write PMEVTYPER_EL0 through PMXEVTYPER_EL0 */ +static inline void write_sel_evtyper(int sel, unsigned long val) +{ + write_sysreg(sel, pmselr_el0); + isb(); + write_sysreg(val, pmxevtyper_el0); + isb(); +} + +static inline void enable_counter(int idx) +{ + uint64_t v = read_sysreg(pmcntenset_el0); + + write_sysreg(BIT(idx) | v, pmcntenset_el0); + isb(); +} + +static inline void disable_counter(int idx) +{ + uint64_t v = read_sysreg(pmcntenset_el0); + + write_sysreg(BIT(idx) | v, pmcntenclr_el0); + isb(); +} + +static inline void pmu_disable_reset(void) +{ + uint64_t pmcr = read_sysreg(pmcr_el0); + + /* Reset all counters, disabling them */ + pmcr &= ~ARMV8_PMU_PMCR_E; + write_sysreg(pmcr | ARMV8_PMU_PMCR_P, pmcr_el0); + isb(); +} + +#define RETURN_READ_PMEVCNTRN(n) \ + return read_sysreg(pmevcntr##n##_el0) +static inline unsigned long read_pmevcntrn(int n) +{ + PMEVN_SWITCH(n, RETURN_READ_PMEVCNTRN); + return 0; +} + +#define WRITE_PMEVCNTRN(n) \ + write_sysreg(val, pmevcntr##n##_el0) +static inline void write_pmevcntrn(int n, unsigned long val) +{ + PMEVN_SWITCH(n, WRITE_PMEVCNTRN); + isb(); +} + +#define READ_PMEVTYPERN(n) \ + return read_sysreg(pmevtyper##n##_el0) +static inline unsigned long read_pmevtypern(int n) +{ + PMEVN_SWITCH(n, READ_PMEVTYPERN); + return 0; +} + +#define WRITE_PMEVTYPERN(n) \ + write_sysreg(val, pmevtyper##n##_el0) +static inline void write_pmevtypern(int n, unsigned long val) +{ + PMEVN_SWITCH(n, WRITE_PMEVTYPERN); + isb(); +} From patchwork Tue Jan 16 06:01:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 13520460 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E5F87DDB9 for ; Tue, 16 Jan 2024 06:01:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="HryBCwXq" DKIM-Signature: v=1; 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Tue, 16 Jan 2024 06:01:34 +0000 (UTC) Received: from virt-mtcollins-01.lab.eng.rdu2.redhat.com (virt-mtcollins-01.lab.eng.rdu2.redhat.com [10.8.1.196]) by smtp.corp.redhat.com (Postfix) with ESMTP id A5B1B2026D6F; Tue, 16 Jan 2024 06:01:34 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: Eric Auger , Shaoqin Huang , Eric Auger , James Morse , Suzuki K Poulose , Zenghui Yu , Paolo Bonzini , Shuah Khan , linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 3/5] KVM: selftests: aarch64: Fix the buggy [enable|disable]_counter Date: Tue, 16 Jan 2024 01:01:21 -0500 Message-Id: <20240116060129.55473-4-shahuang@redhat.com> In-Reply-To: <20240116060129.55473-1-shahuang@redhat.com> References: <20240116060129.55473-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 In general, the set/clr registers should always be used in their write form, never in a RMW form (imagine an interrupt disabling a counter between the read and the write...). The current implementation of [enable|disable]_counter both use the RMW form, fix them by directly write to the set/clr registers. At the same time, it also fix the buggy disable_counter() which would end up disabling all the counters. Reviewed-by: Eric Auger Signed-off-by: Shaoqin Huang --- tools/testing/selftests/kvm/include/aarch64/vpmu.h | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/kvm/include/aarch64/vpmu.h b/tools/testing/selftests/kvm/include/aarch64/vpmu.h index e0cc1ca1c4b7..644dae3814b5 100644 --- a/tools/testing/selftests/kvm/include/aarch64/vpmu.h +++ b/tools/testing/selftests/kvm/include/aarch64/vpmu.h @@ -78,17 +78,13 @@ static inline void write_sel_evtyper(int sel, unsigned long val) static inline void enable_counter(int idx) { - uint64_t v = read_sysreg(pmcntenset_el0); - - write_sysreg(BIT(idx) | v, pmcntenset_el0); + write_sysreg(BIT(idx), pmcntenset_el0); isb(); } static inline void disable_counter(int idx) { - uint64_t v = read_sysreg(pmcntenset_el0); - - write_sysreg(BIT(idx) | v, pmcntenclr_el0); + write_sysreg(BIT(idx), pmcntenclr_el0); isb(); } From patchwork Tue Jan 16 06:01:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 13520463 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 43AC211CBC for ; Tue, 16 Jan 2024 06:01:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="NTjpI0Kv" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1705384902; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9Qw6FiQjfkuQIwLM/Cd1XVofWUckSVDRH6rB1Jby9Xc=; b=NTjpI0KvmuhB+izE88k8A5mBXByNStm6xb7DPMhJnx3ErSv6Q0qbFec15nE65VnTEyQsjL hcZlmBDCLpWSQ/SSTKbAE2HfJ6KLaJOy2zy4l2zJo/VjCkkWRExvyiKigDhrSCk9QX/dRk E22kvUQI75ktkM3Qd1i4sCDXvqAuxQI= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-370-eny1oHpJPiGlyNf6cxFRLg-1; Tue, 16 Jan 2024 01:01:37 -0500 X-MC-Unique: eny1oHpJPiGlyNf6cxFRLg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1FB9B1C05ABF; Tue, 16 Jan 2024 06:01:37 +0000 (UTC) Received: from virt-mtcollins-01.lab.eng.rdu2.redhat.com (virt-mtcollins-01.lab.eng.rdu2.redhat.com [10.8.1.196]) by smtp.corp.redhat.com (Postfix) with ESMTP id 125332026D6F; Tue, 16 Jan 2024 06:01:37 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: Eric Auger , Shaoqin Huang , Paolo Bonzini , Shuah Khan , James Morse , Suzuki K Poulose , Zenghui Yu , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 4/5] KVM: selftests: aarch64: Introduce pmu_event_filter_test Date: Tue, 16 Jan 2024 01:01:22 -0500 Message-Id: <20240116060129.55473-5-shahuang@redhat.com> In-Reply-To: <20240116060129.55473-1-shahuang@redhat.com> References: <20240116060129.55473-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Introduce pmu_event_filter_test for arm64 platforms. The test configures PMUv3 for a vCPU, and sets different pmu event filters for the vCPU, and check if the guest can see those events which user allow and can't use those events which use deny. This test refactor the create_vpmu_vm() and make it a wrapper for __create_vpmu_vm(), which allows some extra init code before KVM_ARM_VCPU_PMU_V3_INIT. And this test use the KVM_ARM_VCPU_PMU_V3_FILTER attribute to set the pmu event filter in KVM. And choose to filter two common event branches_retired and instructions_retired, and let the guest to check if it see the right pmceid register. Signed-off-by: Shaoqin Huang --- tools/testing/selftests/kvm/Makefile | 1 + .../kvm/aarch64/pmu_event_filter_test.c | 219 ++++++++++++++++++ .../selftests/kvm/include/aarch64/vpmu.h | 4 + .../testing/selftests/kvm/lib/aarch64/vpmu.c | 14 +- 4 files changed, 236 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index b60852c222ac..5f126e1a1dbf 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -155,6 +155,7 @@ TEST_GEN_PROGS_aarch64 += aarch64/arch_timer TEST_GEN_PROGS_aarch64 += aarch64/debug-exceptions TEST_GEN_PROGS_aarch64 += aarch64/hypercalls TEST_GEN_PROGS_aarch64 += aarch64/page_fault_test +TEST_GEN_PROGS_aarch64 += aarch64/pmu_event_filter_test TEST_GEN_PROGS_aarch64 += aarch64/psci_test TEST_GEN_PROGS_aarch64 += aarch64/set_id_regs TEST_GEN_PROGS_aarch64 += aarch64/smccc_filter diff --git a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c new file mode 100644 index 000000000000..d280382f362f --- /dev/null +++ b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c @@ -0,0 +1,219 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * pmu_event_filter_test - Test user limit pmu event for guest. + * + * Copyright (c) 2023 Red Hat, Inc. + * + * This test checks if the guest only see the limited pmu event that userspace + * sets, if the guest can use those events which user allow, and if the guest + * can't use those events which user deny. + * This test runs only when KVM_CAP_ARM_PMU_V3, KVM_ARM_VCPU_PMU_V3_FILTER + * is supported on the host. + */ +#include +#include +#include +#include +#include +#include + +struct pmce{ + uint64_t pmceid0; + uint64_t pmceid1; +} supported_pmce, guest_pmce; + +static struct vpmu_vm *vpmu_vm; + +#define FILTER_NR 10 + +struct test_desc { + const char *name; + struct kvm_pmu_event_filter filter[FILTER_NR]; +}; + +#define __DEFINE_FILTER(base, num, act) \ + ((struct kvm_pmu_event_filter) { \ + .base_event = base, \ + .nevents = num, \ + .action = act, \ + }) + +#define DEFINE_FILTER(base, act) __DEFINE_FILTER(base, 1, act) + +#define EMPTY_FILTER { 0 } + +#define SW_INCR 0x0 +#define INST_RETIRED 0x8 +#define BR_RETIRED 0x21 + +static void guest_code(void) +{ + uint64_t pmceid0 = read_sysreg(pmceid0_el0); + uint64_t pmceid1 = read_sysreg(pmceid1_el0); + + GUEST_ASSERT_EQ(guest_pmce.pmceid0, pmceid0); + GUEST_ASSERT_EQ(guest_pmce.pmceid1, pmceid1); + + GUEST_DONE(); +} + +static void guest_get_pmceid(void) +{ + supported_pmce.pmceid0 = read_sysreg(pmceid0_el0); + supported_pmce.pmceid1 = read_sysreg(pmceid1_el0); + + GUEST_DONE(); +} + +static void pmu_event_filter_init(struct vpmu_vm *vm, void *arg) +{ + struct kvm_device_attr attr = { + .group = KVM_ARM_VCPU_PMU_V3_CTRL, + .attr = KVM_ARM_VCPU_PMU_V3_FILTER, + }; + struct kvm_pmu_event_filter *filter = (struct kvm_pmu_event_filter *)arg; + + while (filter && filter->nevents != 0) { + attr.addr = (uint64_t)filter; + vcpu_ioctl(vm->vcpu, KVM_SET_DEVICE_ATTR, &attr); + filter++; + } +} + +static void create_vpmu_vm_with_filter(void *guest_code, + struct kvm_pmu_event_filter *filter) +{ + vpmu_vm = __create_vpmu_vm(guest_code, pmu_event_filter_init, filter); +} + +static void run_vcpu(struct kvm_vcpu *vcpu) +{ + struct ucall uc; + + while (1) { + vcpu_run(vcpu); + switch (get_ucall(vcpu, &uc)) { + case UCALL_DONE: + return; + default: + TEST_FAIL("Unknown ucall %lu", uc.cmd); + } + } +} + +static void set_pmce(struct pmce *pmce, int action, int event) +{ + int base = 0; + uint64_t *pmceid = NULL; + + if (event >= 0x4000) { + event -= 0x4000; + base = 32; + } + + if (event >= 0 && event <= 0x1F) { + pmceid = &pmce->pmceid0; + } else if (event >= 0x20 && event <= 0x3F) { + event -= 0x20; + pmceid = &pmce->pmceid1; + } else { + return; + } + + event += base; + if (action == KVM_PMU_EVENT_ALLOW) + *pmceid |= BIT(event); + else + *pmceid &= ~BIT(event); +} + +static void prepare_guest_pmce(struct kvm_pmu_event_filter *filter) +{ + struct pmce pmce_mask = { ~0, ~0 }; + bool first_filter = true; + + while (filter && filter->nevents != 0) { + if (first_filter) { + if (filter->action == KVM_PMU_EVENT_ALLOW) + memset(&pmce_mask, 0, sizeof(pmce_mask)); + first_filter = false; + } + + set_pmce(&pmce_mask, filter->action, filter->base_event); + filter++; + } + + guest_pmce.pmceid0 = supported_pmce.pmceid0 & pmce_mask.pmceid0; + guest_pmce.pmceid1 = supported_pmce.pmceid1 & pmce_mask.pmceid1; +} + +static void run_test(struct test_desc *t) +{ + pr_debug("Test: %s\n", t->name); + + create_vpmu_vm_with_filter(guest_code, t->filter); + prepare_guest_pmce(t->filter); + sync_global_to_guest(vpmu_vm->vm, guest_pmce); + + run_vcpu(vpmu_vm->vcpu); + + destroy_vpmu_vm(vpmu_vm); +} + +static struct test_desc tests[] = { + {"without_filter", { EMPTY_FILTER }}, + {"member_allow_filter", + {DEFINE_FILTER(SW_INCR, 0), DEFINE_FILTER(INST_RETIRED, 0), + DEFINE_FILTER(BR_RETIRED, 0), EMPTY_FILTER}}, + {"member_deny_filter", + {DEFINE_FILTER(SW_INCR, 1), DEFINE_FILTER(INST_RETIRED, 1), + DEFINE_FILTER(BR_RETIRED, 1), EMPTY_FILTER}}, + {"not_member_deny_filter", + {DEFINE_FILTER(SW_INCR, 1), EMPTY_FILTER}}, + {"not_member_allow_filter", + {DEFINE_FILTER(SW_INCR, 0), EMPTY_FILTER}}, + { 0 } +}; + +static void for_each_test(void) +{ + struct test_desc *t; + + for (t = &tests[0]; t->name; t++) + run_test(t); +} + +static bool kvm_supports_pmu_event_filter(void) +{ + int r; + + vpmu_vm = create_vpmu_vm(guest_code); + + r = __kvm_has_device_attr(vpmu_vm->vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL, + KVM_ARM_VCPU_PMU_V3_FILTER); + + destroy_vpmu_vm(vpmu_vm); + return !r; +} + +static bool host_pmu_supports_events(void) +{ + vpmu_vm = create_vpmu_vm(guest_get_pmceid); + + memset(&supported_pmce, 0, sizeof(supported_pmce)); + sync_global_to_guest(vpmu_vm->vm, supported_pmce); + run_vcpu(vpmu_vm->vcpu); + sync_global_from_guest(vpmu_vm->vm, supported_pmce); + destroy_vpmu_vm(vpmu_vm); + + return supported_pmce.pmceid0 & (BR_RETIRED | INST_RETIRED); +} + +int main(void) +{ + TEST_REQUIRE(kvm_has_cap(KVM_CAP_ARM_PMU_V3)); + TEST_REQUIRE(kvm_supports_pmu_event_filter()); + TEST_REQUIRE(host_pmu_supports_events()); + + for_each_test(); +} diff --git a/tools/testing/selftests/kvm/include/aarch64/vpmu.h b/tools/testing/selftests/kvm/include/aarch64/vpmu.h index 644dae3814b5..f103d0824f8a 100644 --- a/tools/testing/selftests/kvm/include/aarch64/vpmu.h +++ b/tools/testing/selftests/kvm/include/aarch64/vpmu.h @@ -18,6 +18,10 @@ struct vpmu_vm { int gic_fd; }; +struct vpmu_vm *__create_vpmu_vm(void *guest_code, + void (*init_pmu)(struct vpmu_vm *vm, void *arg), + void *arg); + 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 index b3de8fdc555e..76ea03d607f1 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/vpmu.c +++ b/tools/testing/selftests/kvm/lib/aarch64/vpmu.c @@ -7,8 +7,9 @@ #include #include -/* Create a VM that has one vCPU with PMUv3 configured. */ -struct vpmu_vm *create_vpmu_vm(void *guest_code) +struct vpmu_vm *__create_vpmu_vm(void *guest_code, + void (*init_pmu)(struct vpmu_vm *vm, void *arg), + void *arg) { struct kvm_vcpu_init init; uint8_t pmuver; @@ -50,12 +51,21 @@ struct vpmu_vm *create_vpmu_vm(void *guest_code) "Unexpected PMUVER (0x%x) on the vCPU with PMUv3", pmuver); /* Initialize vPMU */ + if (init_pmu) + init_pmu(vpmu_vm, arg); + 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; } +/* Create a VM that has one vCPU with PMUv3 configured. */ +struct vpmu_vm *create_vpmu_vm(void *guest_code) +{ + return __create_vpmu_vm(guest_code, NULL, NULL); +} + void destroy_vpmu_vm(struct vpmu_vm *vpmu_vm) { close(vpmu_vm->gic_fd); From patchwork Tue Jan 16 06:01:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 13520464 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6671912B9F for ; Tue, 16 Jan 2024 06:01:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; 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Tue, 16 Jan 2024 06:01:37 +0000 (UTC) Received: from virt-mtcollins-01.lab.eng.rdu2.redhat.com (virt-mtcollins-01.lab.eng.rdu2.redhat.com [10.8.1.196]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6B99E2026D6F; Tue, 16 Jan 2024 06:01:37 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: Eric Auger , Shaoqin Huang , James Morse , Suzuki K Poulose , Zenghui Yu , Paolo Bonzini , Shuah Khan , linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 5/5] KVM: selftests: aarch64: Add invalid filter test in pmu_event_filter_test Date: Tue, 16 Jan 2024 01:01:23 -0500 Message-Id: <20240116060129.55473-6-shahuang@redhat.com> In-Reply-To: <20240116060129.55473-1-shahuang@redhat.com> References: <20240116060129.55473-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Add the invalid filter test includes sets the filter beyond the event space and sets the invalid action to double check if the KVM_ARM_VCPU_PMU_V3_FILTER will return the expected error. Signed-off-by: Shaoqin Huang --- .../kvm/aarch64/pmu_event_filter_test.c | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c index d280382f362f..68e1f2003312 100644 --- a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c +++ b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c @@ -7,6 +7,7 @@ * This test checks if the guest only see the limited pmu event that userspace * sets, if the guest can use those events which user allow, and if the guest * can't use those events which user deny. + * It also checks that setting invalid filter ranges return the expected error. * This test runs only when KVM_CAP_ARM_PMU_V3, KVM_ARM_VCPU_PMU_V3_FILTER * is supported on the host. */ @@ -183,6 +184,39 @@ static void for_each_test(void) run_test(t); } +static void set_invalid_filter(struct vpmu_vm *vm, void *arg) +{ + struct kvm_pmu_event_filter invalid; + struct kvm_device_attr attr = { + .group = KVM_ARM_VCPU_PMU_V3_CTRL, + .attr = KVM_ARM_VCPU_PMU_V3_FILTER, + .addr = (uint64_t)&invalid, + }; + int ret = 0; + + /* The max event number is (1 << 16), set a range largeer than it. */ + invalid = __DEFINE_FILTER(BIT(15), BIT(15)+1, 0); + ret = __vcpu_ioctl(vm->vcpu, KVM_SET_DEVICE_ATTR, &attr); + TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter range " + "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)", + ret, errno); + + ret = 0; + + /* Set the Invalid action. */ + invalid = __DEFINE_FILTER(0, 1, 3); + ret = __vcpu_ioctl(vm->vcpu, KVM_SET_DEVICE_ATTR, &attr); + TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter action " + "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)", + ret, errno); +} + +static void test_invalid_filter(void) +{ + vpmu_vm = __create_vpmu_vm(guest_code, set_invalid_filter, NULL); + destroy_vpmu_vm(vpmu_vm); +} + static bool kvm_supports_pmu_event_filter(void) { int r; @@ -216,4 +250,6 @@ int main(void) TEST_REQUIRE(host_pmu_supports_events()); for_each_test(); + + test_invalid_filter(); }