From nobody Mon Feb 9 10:28:51 2026 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A0D79189BB3 for ; Fri, 20 Dec 2024 01:39:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734658763; cv=none; b=CrHSjrLwmD8HGoDyrcdb28kKo4oPlAocIJL9VIS1Hcfa1LoDwMNZU9yqneaLQU/68R5XXS+HWx6TLSyWeWjvi8ylmcXmwbc8yWMmi6INlULuORqPJU0HAHKE83SOXFwa6FiLla0ZxZbTyolSVrXpnQoN9mC0TLY1vcdjI+fkZMU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734658763; c=relaxed/simple; bh=B+RJp0TYVNSYdkENveDWwDdnsH059YtVcZm9zws4alI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=KFllteyVk8tqZpOYPsuFTNaZ1SHx3KCHTE1q0AzdHEZFpQhywDCuokN+t7kyOmWoKRJZuEEd46XmxNRePAC5xuIuLHp/t+RAd+7zcWQI35Hegi5d+ugLOA8vtzIWbg5vOMtuUS3xk7DM/gBDYGrBf1mcmfVM6dyacqLp7/dpBuo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=Al7Oj66y; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Al7Oj66y" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-2ef9da03117so1749214a91.1 for ; Thu, 19 Dec 2024 17:39:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1734658761; x=1735263561; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=dH5y8/UE39Fu2msLM/JJYa9i5LZG9N1ZOJAUvzMfFnk=; b=Al7Oj66ydz8dPcNCKh4q0gXlV+MOOD7aAQQss8of06t7hMxi8z628f6gqgD31Gt4e3 xFGXY1rp5/2MnBm+nuwk2tU+sP6i9nFCt1dOV1CfDpy20vbNF6//WJIoCiYmNjHgy5lG 4m1hr2EgYoec88H0VzD5XRBtf400nA7y9esYkYd/WnJic/x1UUD5enbSaSxknGgBF/8x 143vgHGBG7Ylv4jDXWJbVYq+JHXTcPvbNdG8Ezk6JOQWy6pqPUfLAjkp4U5ORG5cyPtl HhkI0P/zruV+JrU//Cg18PW9Zn7V9gYubXSdcHWf6RJyo+jRu/RxiQIMcaOBrOc2D7TX ThxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734658761; x=1735263561; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=dH5y8/UE39Fu2msLM/JJYa9i5LZG9N1ZOJAUvzMfFnk=; b=soZzTFTtgTHTCv9Hy/3j/wE0GutAcOeuPaGTEs/BPzTrVoltKOuzEl9bojrDcKxESg R6OWUSFcs0IDLDw+3lrtHK53zRVfxRf2KVoCMoMtJy0a18PgmkitvX9fTn8K+NO9YIey Wna1fE2xB/QbWi7sr/DSs6+EONYHb2nB1/ZANTwHNhLCnL+boDyi7g/n5u+qvoFZ8t22 w1gUrdafOZQXTlL8Gvbqzv+85VwEWV39uVc/EeSnKjPLXEjwOwDlxTaw2KJznZFMX2Ku W103WT58+NfHwuiqwg+jaOK/3AD2RaMQL/JDAw6TlOpx3kTjwMRO2cp+34HmnsHKBexQ 27UA== X-Forwarded-Encrypted: i=1; AJvYcCUhmak7vVl6nTtu67aDxqdw9E2I+pcNvdd8rkY64dliQh2muNU9kUpeRmI8aRI5KHjOE07SRpmDZzXRWR8=@vger.kernel.org X-Gm-Message-State: AOJu0YzJ+O++4Img7jU0Ab0QIOly4z3meN/BcwCGGcF4aSmT1VhLasib 0FqvoCFcwHwMJ7qsj/ZOPQtq91S5XboYvLaQsVZEJgpNnXIZ1iRxabeIFMSfK3wwzfwlRVP7TfQ XBQ== X-Google-Smtp-Source: AGHT+IEWDX/fMBQN37LNDm8pwZAbb4nPz2A12lsLKXmgW0NfsvdhBH23GcxtGNe29UPGQ7kGMBybcOA6PXg= X-Received: from pjbqn15.prod.google.com ([2002:a17:90b:3d4f:b0:2ef:8612:dd6b]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:e18b:b0:2ee:9902:18b4 with SMTP id 98e67ed59e1d1-2f452ee838bmr1687135a91.27.1734658760980; Thu, 19 Dec 2024 17:39:20 -0800 (PST) Reply-To: Sean Christopherson Date: Thu, 19 Dec 2024 17:39:05 -0800 In-Reply-To: <20241220013906.3518334-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241220013906.3518334-1-seanjc@google.com> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Message-ID: <20241220013906.3518334-8-seanjc@google.com> Subject: [PATCH 7/8] KVM: selftests: Add infrastructure for getting vCPU binary stats From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson , Paolo Bonzini Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Now that the binary stats cache infrastructure is largely scope agnostic, add support for vCPU-scoped stats. Like VM stats, open and cache the stats FD when the vCPU is created so that it's guaranteed to be valid when vcpu_get_stats() is invoked. To sanity check that the infrastructure actually works, and to get a bit of bonus coverage, add an assert in x86's xapic_ipi_test to verify that the number of HLTs executed by the test matches the number of HLT exits observed by KVM. Signed-off-by: Sean Christopherson --- .../testing/selftests/kvm/include/kvm_util.h | 20 +++++++++------ tools/testing/selftests/kvm/lib/kvm_util.c | 25 +++++++------------ .../selftests/kvm/x86/xapic_ipi_test.c | 2 ++ 3 files changed, 23 insertions(+), 24 deletions(-) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing= /selftests/kvm/include/kvm_util.h index 9a64bab42f89..e0d23873158e 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -61,6 +61,7 @@ struct kvm_vcpu { #ifdef __x86_64__ struct kvm_cpuid2 *cpuid; #endif + struct kvm_binary_stats stats; struct kvm_dirty_gfn *dirty_gfns; uint32_t fetch_index; uint32_t dirty_gfns_count; @@ -534,17 +535,20 @@ void read_stat_data(int stats_fd, struct kvm_stats_he= ader *header, struct kvm_stats_desc *desc, uint64_t *data, size_t max_elements); =20 -void __vm_get_stat(struct kvm_vm *vm, const char *stat_name, uint64_t *dat= a, - size_t max_elements); +void kvm_get_stat(struct kvm_binary_stats *stats, const char *name, + uint64_t *data, size_t max_elements); =20 -#define vm_get_stat(vm, stat) \ -({ \ - uint64_t data; \ - \ - __vm_get_stat(vm, #stat, &data, 1); \ - data; \ +#define __get_stat(stats, stat) \ +({ \ + uint64_t data; \ + \ + kvm_get_stat(stats, #stat, &data, 1); \ + data; \ }) =20 +#define vm_get_stat(vm, stat) __get_stat(&(vm)->stats, stat) +#define vcpu_get_stat(vcpu, stat) __get_stat(&(vcpu)->stats, stat) + void vm_create_irqchip(struct kvm_vm *vm); =20 static inline int __vm_create_guest_memfd(struct kvm_vm *vm, uint64_t size, diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/sel= ftests/kvm/lib/kvm_util.c index 16ee03e76d66..99fe8bcd2346 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -712,6 +712,8 @@ static void vm_vcpu_rm(struct kvm_vm *vm, struct kvm_vc= pu *vcpu) ret =3D close(vcpu->fd); TEST_ASSERT(!ret, __KVM_SYSCALL_ERROR("close()", ret)); =20 + kvm_stats_release(&vcpu->stats); + list_del(&vcpu->list); =20 vcpu_arch_free(vcpu); @@ -1305,6 +1307,11 @@ struct kvm_vcpu *__vm_vcpu_add(struct kvm_vm *vm, ui= nt32_t vcpu_id) TEST_ASSERT(vcpu->run !=3D MAP_FAILED, __KVM_SYSCALL_ERROR("mmap()", (int)(unsigned long)MAP_FAILED)); =20 + if (kvm_has_cap(KVM_CAP_BINARY_STATS_FD)) + vcpu->stats.fd =3D vcpu_get_stats_fd(vcpu); + else + vcpu->stats.fd =3D -1; + /* Add to linked-list of VCPUs. */ list_add(&vcpu->list, &vm->vcpus); =20 @@ -2217,23 +2224,9 @@ void read_stat_data(int stats_fd, struct kvm_stats_h= eader *header, desc->name, size, ret); } =20 -/* - * Read the data of the named stat - * - * Input Args: - * vm - the VM for which the stat should be read - * stat_name - the name of the stat to read - * max_elements - the maximum number of 8-byte values to read into data - * - * Output Args: - * data - the buffer into which stat data should be read - * - * Read the data values of a specified stat from the binary stats interfac= e. - */ -void __vm_get_stat(struct kvm_vm *vm, const char *name, uint64_t *data, - size_t max_elements) +void kvm_get_stat(struct kvm_binary_stats *stats, const char *name, + uint64_t *data, size_t max_elements) { - struct kvm_binary_stats *stats =3D &vm->stats; struct kvm_stats_desc *desc; size_t size_desc; int i; diff --git a/tools/testing/selftests/kvm/x86/xapic_ipi_test.c b/tools/testi= ng/selftests/kvm/x86/xapic_ipi_test.c index a76078a08ff8..574a944763b7 100644 --- a/tools/testing/selftests/kvm/x86/xapic_ipi_test.c +++ b/tools/testing/selftests/kvm/x86/xapic_ipi_test.c @@ -465,6 +465,8 @@ int main(int argc, char *argv[]) cancel_join_vcpu_thread(threads[0], params[0].vcpu); cancel_join_vcpu_thread(threads[1], params[1].vcpu); =20 + TEST_ASSERT_EQ(data->hlt_count, vcpu_get_stat(params[0].vcpu, halt_exits)= ); + fprintf(stderr, "Test successful after running for %d seconds.\n" "Sending vCPU sent %lu IPIs to halting vCPU\n" --=20 2.47.1.613.gc27f4b7a9f-goog