From mboxrd@z Thu Jan 1 00:00:00 1970 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 2348A1BE23D for ; Wed, 11 Sep 2024 20:42:43 +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=1726087365; cv=none; b=RCxDaFrVQLFNbkB8eW94qPFEa14t5S9MQ6s8g1WZPWoEJ7aP+6aPU5Zr9u5jiIIJK7ZtRdsBX06+hpFDqQoxwVi+mhwZ8sRM7HkDkM6GKSuhuP4olcfhvKy24E7q7o6emzrwJzTP6h5cvf9nd5i0HgVSZH35wtZmQ/wFzRNfWWU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726087365; c=relaxed/simple; bh=RjIjbK/O7AOXgjJl4H0U8PhhFXmA3gdfj48wRxxggdY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=gLMlAALbbiHqDZJApa1wN2G/15esHCHDiSGRr8bUAHfFCY3A2YCbf+lPzyCpv67y1PTKWucqBcuOa2I13AlAOVGYy1Zu3Mr1FGHNvWqXOLCpmXJ9nEZww/zLktNRhFXir9/Tw0uPKmxsE1/KNrGAbEMLoSuACj26zA6bLCh+NYo= 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=l1c1pnzr; 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="l1c1pnzr" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-2d8e59fcd4bso358649a91.1 for ; Wed, 11 Sep 2024 13:42:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1726087363; x=1726692163; darn=lists.linux.dev; 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=bmoPUX+JXjpnDZGI5p6xMsNQ8aqKvxbSE8GAbeQD0ic=; b=l1c1pnzrtWarIFI8g8HWMgBP+R/ax8xqIczGIh6ChaAd9LLfWq3xYiNUhG87SHjQeN ejMXJeoOEVY/8iAIp3OFxu2Hk73fHGZrhfw7AdiINP38aOa0EZemCNRcIwnvizpwLU84 ghmAMVS+kIRPtcv4Z4LjDm3ow5Zay+imJ6h1LcmG1j90a1nWCeTThKhwuV4nKmid9/b8 9MNupNwaATdrCOslkZgjOWpkcp2rJN4/ghpk6mcTu1n/pMZRGOt0mMjwVXkuyl/+oLq2 ho9grQ92+fZ5fOgGWgeMzvvF2qRRSKqKrTwZacePcJujm2e1sTd98qUDmHuyloc5Q5JY oMOQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726087363; x=1726692163; 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=bmoPUX+JXjpnDZGI5p6xMsNQ8aqKvxbSE8GAbeQD0ic=; b=I0pLLXWpj0nV1wmkmHG8VWsTGRd6AV2bx73Gds3rTrFZR8iV3y/0FyG8NZdV1z3PyI DFMlHoVSOEQTn/lgoT0PMpQPUAH/1roHEshDF/WI6n/P7rjFpK67D3en2pQOi1BvtnIL HsKuQJy3eWLYVLWZmQPKZVBOrOMTeXQcWh6+Zvax+/ADbDPKYC9e2XmoW112NWxGkh+h rvEaTa+uz47YNRxRtflcooSz4Nhgezlm17HUJsLRkkPzIuUtAwHHYObrcJ8JbXBOxae9 IDoRiO7iMox5AMOe8BQahGwv0yqiUXVjFm7JPqH7C1IaLNMXQqvv9oX1PIBkKk0n1V4Y GMOw== X-Forwarded-Encrypted: i=1; AJvYcCWIebuv7/A0OzxINtBgLTu6vge1UGBaoBdZzD5AaTHfja1Cdds3hG6E5bxB8br/kTaEjgyeb9A=@lists.linux.dev X-Gm-Message-State: AOJu0YzgjFteCLpM4u3jrT2du+2J4cYqG8SWxykCRphE5DF/tN1rIoMO VHEpMqcll5LcVesQPJ1AvvWQ1cxGL6JuWiwKeO5BkTsdhYGyCqt48FC5sCZn8xXPvFpVGde6RD9 jcg== X-Google-Smtp-Source: AGHT+IFejIMeELuVO8txo5UGwYsGrFXhMhJbdLyClaj2asDasqbAOd2Ag+P6eX01VQr2edSnhAi2+MXrYfY= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:90b:710:b0:2d8:a9a0:3615 with SMTP id 98e67ed59e1d1-2dba005b566mr856a91.8.1726087363354; Wed, 11 Sep 2024 13:42:43 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 11 Sep 2024 13:41:56 -0700 In-Reply-To: <20240911204158.2034295-1-seanjc@google.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240911204158.2034295-1-seanjc@google.com> X-Mailer: git-send-email 2.46.0.598.g6f2099f65c-goog Message-ID: <20240911204158.2034295-12-seanjc@google.com> Subject: [PATCH v2 11/13] KVM: selftests: Precisely limit the number of guest loops in mmu_stress_test From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Anup Patel , Paolo Bonzini , Christian Borntraeger , Janosch Frank , Claudio Imbrenda 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, Sean Christopherson , James Houghton Content-Type: text/plain; charset="UTF-8" Run the exact number of guest loops required in mmu_stress_test instead of looping indefinitely in anticipation of adding more stages that run different code (e.g. reads instead of writes). Signed-off-by: Sean Christopherson --- tools/testing/selftests/kvm/mmu_stress_test.c | 25 ++++++++++++++----- 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/kvm/mmu_stress_test.c b/tools/testing/selftests/kvm/mmu_stress_test.c index 80863e8290db..9573ed0e696d 100644 --- a/tools/testing/selftests/kvm/mmu_stress_test.c +++ b/tools/testing/selftests/kvm/mmu_stress_test.c @@ -19,12 +19,15 @@ static void guest_code(uint64_t start_gpa, uint64_t end_gpa, uint64_t stride) { uint64_t gpa; + int i; - for (;;) { + for (i = 0; i < 2; i++) { for (gpa = start_gpa; gpa < end_gpa; gpa += stride) vcpu_arch_put_guest(*((volatile uint64_t *)gpa), gpa); - GUEST_SYNC(0); + GUEST_SYNC(i); } + + GUEST_ASSERT(0); } struct vcpu_info { @@ -51,10 +54,18 @@ static void rendezvous_with_boss(void) } } -static void run_vcpu(struct kvm_vcpu *vcpu) +static void assert_sync_stage(struct kvm_vcpu *vcpu, int stage) +{ + struct ucall uc; + + TEST_ASSERT_EQ(get_ucall(vcpu, &uc), UCALL_SYNC); + TEST_ASSERT_EQ(uc.args[1], stage); +} + +static void run_vcpu(struct kvm_vcpu *vcpu, int stage) { vcpu_run(vcpu); - TEST_ASSERT_EQ(get_ucall(vcpu, NULL), UCALL_SYNC); + assert_sync_stage(vcpu, stage); } static void *vcpu_worker(void *data) @@ -68,7 +79,8 @@ static void *vcpu_worker(void *data) rendezvous_with_boss(); - run_vcpu(vcpu); + /* Stage 0, write all of guest memory. */ + run_vcpu(vcpu, 0); rendezvous_with_boss(); #ifdef __x86_64__ vcpu_sregs_get(vcpu, &sregs); @@ -78,7 +90,8 @@ static void *vcpu_worker(void *data) #endif rendezvous_with_boss(); - run_vcpu(vcpu); + /* Stage 1, re-write all of guest memory. */ + run_vcpu(vcpu, 1); rendezvous_with_boss(); return NULL; -- 2.46.0.598.g6f2099f65c-goog