From patchwork Tue Mar 26 03:37:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 783409 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 CE6181EEE6 for ; Tue, 26 Mar 2024 03:37:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711424238; cv=none; b=N72aZ9kpRlivFESTR3pfqn8cHG1Br6zIp30BNldodhi1dCf6ibTaCD6T48Ifm616sVmBSoewjaTG6oPKjPyoPkDbTDkv7x+RAbuiu+FpsJXV6dDG0gnbvopn5mKNdqv3je5JPNe2hnsb1yWC94PNd6YjupUNEIvugIlV6CeJTqY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711424238; c=relaxed/simple; bh=guEa8Gu7AgWMHoz+deeYODTcNOKeQLiJjToQKhTp2QM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=gnYgIqPeFkEuy5p+IXd1UTe1RmMb76f5f9RtvAe+Zf/JGPue/I68FJg+c70XcgFLcCwO1x4map6hpGVd3LLWVPfrmSVnabKd6f6zXyvHNjAswsDxm7O29jQKqk/lLMN7yr2ybX66FNrSoIL3rpPWfU7Z9fBwWJ431FlrvgXbf9A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=bKdCbU5w; arc=none smtp.client-ip=170.10.129.124 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="bKdCbU5w" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1711424235; 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=2YhhpUYjzkJ8Xe1BPLPOMrPAah757pDAo33eD0cMCSc=; b=bKdCbU5wq89gCcYaQg5mUXJT7Gt0Q6L3SnNI55NV6mIhaXt5Z6A/lkwgcr347XCODRElY2 TGmm5o/E765nVXN5od32Und7D/bjR0Yzdpv6vgk+epij5i7V9YsVa8hgYYUryXWY3HW95c hg8Aut7IVMhDjkJ7A+nIo2N5VM2SzMw= 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-611-rU-6DTFnMhu3Prjunc832Q-1; Mon, 25 Mar 2024 23:37:13 -0400 X-MC-Unique: rU-6DTFnMhu3Prjunc832Q-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (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 CFF5E84B162; Tue, 26 Mar 2024 03:37:12 +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 F300E492BC4; Tue, 26 Mar 2024 03:37:11 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: Shaoqin Huang , Eric Auger , James Morse , Suzuki K Poulose , Zenghui Yu , Paolo Bonzini , Shuah Khan , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v6 1/3] KVM: selftests: aarch64: Add helper function for the vpmu vcpu creation Date: Mon, 25 Mar 2024 23:37:00 -0400 Message-Id: <20240326033706.117189-2-shahuang@redhat.com> In-Reply-To: <20240326033706.117189-1-shahuang@redhat.com> References: <20240326033706.117189-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 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 Signed-off-by: Shaoqin Huang --- .../kvm/aarch64/vpmu_counter_access.c | 33 ++++--------------- .../selftests/kvm/include/aarch64/vpmu.h | 28 ++++++++++++++++ 2 files changed, 35 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 f2fb0e3f14bc..33358797e7ec 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 @@ -410,18 +411,8 @@ 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)); @@ -433,27 +424,17 @@ 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, 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); + 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 + +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); +} From patchwork Tue Mar 26 03:37:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 783408 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 7CD7812A17B for ; Tue, 26 Mar 2024 03:37:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711424242; cv=none; b=t8VwLGN6Ubv41v3MY/fUP2JfV9GBup/7sZJAfN7O61GiD+EOn6/n1mGAyqydT7znZG55oQ0b7F3Prte8bFeuOaYXAhV1AmgRWVA+EpIG9MCgDC9qitWnWOMYJO9XPP/LWZQuLNYpLDk9zqMFB1LUJqPxGQBtxGjFWCX7aXDiJgI= ARC-Message-Signature: i=1; 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Tue, 26 Mar 2024 03:37:15 +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 236EC492BC4; Tue, 26 Mar 2024 03:37:15 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: 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 v6 2/3] KVM: selftests: aarch64: Introduce pmu_event_filter_test Date: Mon, 25 Mar 2024 23:37:01 -0400 Message-Id: <20240326033706.117189-3-shahuang@redhat.com> In-Reply-To: <20240326033706.117189-1-shahuang@redhat.com> References: <20240326033706.117189-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 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 | 298 ++++++++++++++++++ 2 files changed, 299 insertions(+) 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 741c7dc16afc..9745be534df3 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -151,6 +151,7 @@ TEST_GEN_PROGS_aarch64 += aarch64/aarch32_id_regs 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..972384e81067 --- /dev/null +++ b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c @@ -0,0 +1,298 @@ + +// 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 pmu_common_event_ids { + uint64_t pmceid0; + uint64_t pmceid1; +} max_pmce, expected_pmce; + +struct vpmu_vm { + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + int gic_fd; +}; + +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) + +static void guest_code(void) +{ + uint64_t pmceid0 = read_sysreg(pmceid0_el0); + uint64_t pmceid1 = read_sysreg(pmceid1_el0); + + GUEST_ASSERT_EQ(expected_pmce.pmceid0, pmceid0); + GUEST_ASSERT_EQ(expected_pmce.pmceid1, pmceid1); + + GUEST_DONE(); +} + +static void guest_get_pmceid(void) +{ + max_pmce.pmceid0 = read_sysreg(pmceid0_el0); + max_pmce.pmceid1 = read_sysreg(pmceid1_el0); + + GUEST_DONE(); +} + +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; + case UCALL_ABORT: + REPORT_GUEST_ASSERT(uc); + break; + default: + TEST_FAIL("Unknown ucall %lu", uc.cmd); + } + } +} + +static void set_pmce(struct pmu_common_event_ids *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_expected_pmce(struct kvm_pmu_event_filter *filter) +{ + struct pmu_common_event_ids pmce_mask = { ~0, ~0 }; + bool first_filter = true; + int i; + + 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; + } + + for (i = 0; i < filter->nevents; i++) + set_pmce(&pmce_mask, filter->action, + filter->base_event + i); + + filter++; + } + + expected_pmce.pmceid0 = max_pmce.pmceid0 & pmce_mask.pmceid0; + expected_pmce.pmceid1 = max_pmce.pmceid1 & pmce_mask.pmceid1; +} + +static void pmu_event_filter_init(struct kvm_pmu_event_filter *filter) +{ + while (filter && filter->nevents != 0) { + kvm_device_attr_set(vpmu_vm.vcpu->fd, + KVM_ARM_VCPU_PMU_V3_CTRL, + KVM_ARM_VCPU_PMU_V3_FILTER, + filter); + filter++; + } +} + +#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_with_filter(void *guest_code, + struct kvm_pmu_event_filter *filter) +{ + uint64_t irq = 23; + + /* 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); + vpmu_vm.vcpu = vm_vcpu_add_with_vpmu(vpmu_vm.vm, 0, guest_code); + 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"); + + pmu_event_filter_init(filter); + + /* Initialize vPMU */ + vpmu_set_irq(vpmu_vm.vcpu, irq); + vpmu_init(vpmu_vm.vcpu); +} + +static void create_vpmu_vm(void *guest_code) +{ + create_vpmu_vm_with_filter(guest_code, NULL); +} + +static void destroy_vpmu_vm(void) +{ + close(vpmu_vm.gic_fd); + kvm_vm_free(vpmu_vm.vm); +} + +static void run_test(struct test_desc *t) +{ + pr_info("Test: %s\n", t->name); + + create_vpmu_vm_with_filter(guest_code, t->filter); + prepare_expected_pmce(t->filter); + sync_global_to_guest(vpmu_vm.vm, expected_pmce); + + run_vcpu(vpmu_vm.vcpu); + + destroy_vpmu_vm(); +} + +static struct test_desc tests[] = { + { + .name = "without_filter", + .filter = { + { 0 } + }, + }, + { + .name = "member_allow_filter", + .filter = { + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_SW_INCR, 0), + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_INST_RETIRED, 0), + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_BR_RETIRED, 0), + { 0 }, + }, + }, + { + .name = "member_deny_filter", + .filter = { + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_SW_INCR, 1), + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_INST_RETIRED, 1), + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_BR_RETIRED, 1), + { 0 }, + }, + }, + { + .name = "not_member_deny_filter", + .filter = { + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_SW_INCR, 1), + { 0 }, + }, + }, + { + .name = "not_member_allow_filter", + .filter = { + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_SW_INCR, 0), + { 0 }, + }, + }, + { + .name = "deny_chain_filter", + .filter = { + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_CHAIN, 1), + { 0 }, + }, + }, + { + .name = "deny_cpu_cycles_filter", + .filter = { + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_CPU_CYCLES, 1), + { 0 }, + }, + }, + { + .name = "cancel_filter", + .filter = { + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_CPU_CYCLES, 0), + DEFINE_FILTER(ARMV8_PMUV3_PERFCTR_CPU_CYCLES, 1), + }, + }, + { + .name = "multiple_filter", + .filter = { + __DEFINE_FILTER(0x0, 0x10, 0), + __DEFINE_FILTER(0x6, 0x3, 1), + }, + }, + { 0 } +}; + +static void run_tests(void) +{ + struct test_desc *t; + + for (t = &tests[0]; t->name; t++) + run_test(t); +} + +static bool kvm_pmu_support_events(void) +{ + create_vpmu_vm(guest_get_pmceid); + + memset(&max_pmce, 0, sizeof(max_pmce)); + sync_global_to_guest(vpmu_vm.vm, max_pmce); + run_vcpu(vpmu_vm.vcpu); + sync_global_from_guest(vpmu_vm.vm, max_pmce); + destroy_vpmu_vm(); + + return max_pmce.pmceid0 & + (ARMV8_PMUV3_PERFCTR_BR_RETIRED | + ARMV8_PMUV3_PERFCTR_INST_RETIRED | + ARMV8_PMUV3_PERFCTR_CHAIN); +} + +int main(void) +{ + TEST_REQUIRE(kvm_has_cap(KVM_CAP_ARM_PMU_V3)); + TEST_REQUIRE(kvm_pmu_support_events()); + + run_tests(); +} From patchwork Tue Mar 26 03:37:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 782898 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 2AE3912A166 for ; 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Mon, 25 Mar 2024 23:37:16 -0400 X-MC-Unique: 7x3Mwbx-P7mSl5eCsRyhgQ-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (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 BDA931C05152; Tue, 26 Mar 2024 03:37:15 +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 7B9F6492BD0; Tue, 26 Mar 2024 03:37:15 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: 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 v6 3/3] KVM: selftests: aarch64: Add invalid filter test in pmu_event_filter_test Date: Mon, 25 Mar 2024 23:37:02 -0400 Message-Id: <20240326033706.117189-4-shahuang@redhat.com> In-Reply-To: <20240326033706.117189-1-shahuang@redhat.com> References: <20240326033706.117189-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 Add the invalid filter test which 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. Reviewed-by: Eric Auger Signed-off-by: Shaoqin Huang --- .../kvm/aarch64/pmu_event_filter_test.c | 38 +++++++++++++++++++ 1 file changed, 38 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 972384e81067..1abcd9ab325e 100644 --- a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c +++ b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c @@ -8,6 +8,7 @@ * 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. */ @@ -273,6 +274,41 @@ static void run_tests(void) run_test(t); } +static void test_invalid_filter(void) +{ + struct kvm_pmu_event_filter invalid; + int ret; + + pr_info("Test: test_invalid_filter\n"); + + memset(&vpmu_vm, 0, sizeof(vpmu_vm)); + + vpmu_vm.vm = vm_create(1); + vpmu_vm.vcpu = vm_vcpu_add_with_vpmu(vpmu_vm.vm, 0, guest_code); + 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"); + + /* The max event number is (1 << 16), set a range largeer than it. */ + invalid = __DEFINE_FILTER(BIT(15), BIT(15) + 1, 0); + ret = __kvm_device_attr_set(vpmu_vm.vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL, + KVM_ARM_VCPU_PMU_V3_FILTER, &invalid); + TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter range " + "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)", + ret, errno); + + /* Set the Invalid action. */ + invalid = __DEFINE_FILTER(0, 1, 3); + ret = __kvm_device_attr_set(vpmu_vm.vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL, + KVM_ARM_VCPU_PMU_V3_FILTER, &invalid); + TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter action " + "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)", + ret, errno); + + destroy_vpmu_vm(); +} + static bool kvm_pmu_support_events(void) { create_vpmu_vm(guest_get_pmceid); @@ -295,4 +331,6 @@ int main(void) TEST_REQUIRE(kvm_pmu_support_events()); run_tests(); + + test_invalid_filter(); }