From nobody Mon Feb 9 06:25:07 2026 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 7CB3915098F for ; Sat, 11 Jan 2025 00:51:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736556664; cv=none; b=HKgbmrec+wXnZt5PcDp357tG2iJC1Uug1FzP5AZ5F+vTwEQaz39JO10kSaDLnuJoM3owng3X930SAksA8Oe+TmaTfEapDVQGxxgkZ4/IcdZ/7IHAAVAWT48VE3QkFAb9TqNENAwg2ACTzmk4j7NcBraIZS5R5xlFX3ADb+MtGSM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736556664; c=relaxed/simple; bh=9wCSd3rSLA4oI57Um3yrK2ezfr59o98xEdgio1tOA1k=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=bTBZV8s/BIl3L3BbGDkSN5bu3yN/252Kw0odBucaZ2gcw5+AbKcopEMJOh7SaXhZPHw2c7Ow1YSziqxXyxRLESxNpgTIL4En9gz8+lQrEYHFQ8Bav4yEYPekGZ5eLhzMTpShnVOoiOXA7qYrZ0GyY/HzVos0PU9u6PujZ3Ib8lw= 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=H8cNZlc6; arc=none smtp.client-ip=209.85.216.74 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="H8cNZlc6" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-2f2a9743093so4764418a91.3 for ; Fri, 10 Jan 2025 16:51:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1736556662; x=1737161462; 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=9d0sb2aXj7DAHSi3NyOXr17347erebt+0rHoY2hViJM=; b=H8cNZlc6tDTrxCDUjw05dZs8eqIrZRwhHA7BCspiemMfAw56X3j8rskLOJVHIcONCP iKqGyFYQeLBsWDQgIfcc1chpB8rGX3iXOfc0VvFSzCfHQf/Zz2Ow6f0vyTcVPKD4J4ID +QHYR8e1o9K0crzSFF5kZG6X+IcoHOSHNSWM0S7NWDNi6lg7zyBhwMdVKGcLLslMcgsy h5EeTm6tNtyuUHF3oTR7YRC5htZKJjNqydix3bipSTZeDc0ws8olZJM/dw6/WF4BMzHR sIWGw3mH3qANH+bLechbhGpQ05EX453F87iMvvtcMKIxpTzcyUDbIfF6bDgQCfpBl9Cp Mesg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1736556662; x=1737161462; 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=9d0sb2aXj7DAHSi3NyOXr17347erebt+0rHoY2hViJM=; b=EnXTZKy8tan1e9Qe/HMgZhin0GV3lERCAXxWpcjY59NUxleVrjCFlbFuIzPlTo8nU7 ChIXYu8zL8EE6gv30Pg9Kz5VsuJzEYk6KddhKaSL7lz4iDivIoulAgt/5KflZR6d5NWE cDZXZLyn+pLqpgp8BACQABxZDzPMgKSP2h2po06dTdZ9fUMZ23WnXqCbIJdxf+6b1yV8 ntXHiGIc0FJ6dl8S00/teKqeRt0ISpkR5sPxsH3rNJi4anqpS+dqMIMS9dnv3Xm7KA5A b/XdSCScMAdS91l38kAQgfxmxmKotDjtHjNbNliH7w88cMofa9uqAgHwyUP4XKTDjyZd vM+g== X-Forwarded-Encrypted: i=1; AJvYcCXGmPO96B/M2DZQfrnRacq8xuRPcIKdlGQkTjzTXbwtwRIIBFpUompac8VNix//r6PU1Cb/IHoUCUUD61Y=@vger.kernel.org X-Gm-Message-State: AOJu0YykVm9bcALgRhPfV30xDnlszAxZFf3ibSgB+EESbNtPn1x9Utgd 7vxUY8eA8bsu55+gn9A84Xb/9DT9j1aJg1B8tIDO6Zt+ewsByMRrw0+0ER5npG33eqfOgqX19US eIQ== X-Google-Smtp-Source: AGHT+IGlLX0aEPqXGbQsPjSqI3Z9q/GgP2EA9enACEq8PUpXduEFLRvRbXw1OHEj1+uEtI1vezl+E8v1zzM= X-Received: from pjbnw2.prod.google.com ([2002:a17:90b:2542:b0:2f4:4222:ebba]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:51c5:b0:2f4:423a:8fb2 with SMTP id 98e67ed59e1d1-2f548eca27emr18806754a91.20.1736556661971; Fri, 10 Jan 2025 16:51:01 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 10 Jan 2025 16:50:46 -0800 In-Reply-To: <20250111005049.1247555-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250111005049.1247555-1-seanjc@google.com> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Message-ID: <20250111005049.1247555-7-seanjc@google.com> Subject: [PATCH v2 6/9] KVM: selftests: Get VM's binary stats FD when opening VM 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" Get and cache a VM's binary stats FD when the VM is opened, as opposed to waiting until the stats are first used. Opening the stats FD outside of __vm_get_stat() will allow converting it to a scope-agnostic helper. Note, this doesn't interfere with kvm_binary_stats_test's testcase that verifies a stats FD can be used after its own VM's FD is closed, as the cached FD is also closed during kvm_vm_free(). Signed-off-by: Sean Christopherson --- tools/testing/selftests/kvm/lib/kvm_util.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/sel= ftests/kvm/lib/kvm_util.c index c88f5e7871f7..16ee03e76d66 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -196,6 +196,11 @@ static void vm_open(struct kvm_vm *vm) =20 vm->fd =3D __kvm_ioctl(vm->kvm_fd, KVM_CREATE_VM, (void *)vm->type); TEST_ASSERT(vm->fd >=3D 0, KVM_IOCTL_ERROR(KVM_CREATE_VM, vm->fd)); + + if (kvm_has_cap(KVM_CAP_BINARY_STATS_FD)) + vm->stats.fd =3D vm_get_stats_fd(vm); + else + vm->stats.fd =3D -1; } =20 const char *vm_guest_mode_string(uint32_t i) @@ -661,14 +666,17 @@ static void kvm_stats_release(struct kvm_binary_stats= *stats) { int ret; =20 - if (!stats->desc) + if (stats->fd < 0) return; =20 - free(stats->desc); - stats->desc =3D NULL; + if (stats->desc) { + free(stats->desc); + stats->desc =3D NULL; + } =20 ret =3D close(stats->fd); TEST_ASSERT(!ret, __KVM_SYSCALL_ERROR("close()", ret)); + stats->fd =3D -1; } =20 __weak void vcpu_arch_free(struct kvm_vcpu *vcpu) @@ -2231,7 +2239,6 @@ void __vm_get_stat(struct kvm_vm *vm, const char *nam= e, uint64_t *data, int i; =20 if (!stats->desc) { - stats->fd =3D vm_get_stats_fd(vm); read_stats_header(stats->fd, &stats->header); stats->desc =3D read_stats_descriptors(stats->fd, &stats->header); } --=20 2.47.1.613.gc27f4b7a9f-goog