From nobody Sun Feb 8 14:10:51 2026 Received: from mail-qv1-f74.google.com (mail-qv1-f74.google.com [209.85.219.74]) (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 4973C205E0A for ; Thu, 9 Jan 2025 20:50:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736455805; cv=none; b=PiCDQmkY9QP7rqw9l2NoxkPMm9qT8EWAxYdPJgFLZxbj2SPeurg6vNN+mq8mRnuelSCZjG//pXdfVePTE7sIBCwywkX0zmipwP2lmVRK7cyLjc07HJ0ciRm4mMJmmEnz3/GmqvZWqf8EHw+2me3sKjefej5PkUaW0Oi2wKK5ToM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736455805; c=relaxed/simple; bh=wX30xj9sJm8y6Ulhl1IoKeVlsOrKZuVPq174Ef2/lmg=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ogXiuK0z06bVVBTdYrpPpFm7D2/Bgbk+Zd4tx0e+mZZJ4sJwIsUw8nQdRhZl23RN9eYVFSeUbNCwFY3WaXHJm5A6Rm5FcIQwlY+kAgheygAvgbQq3JRX6W8Z8cT4a/QC6whUpwWT3b1G7p6Yc3fu0/C9bdOzbYfUooYERBDPMpM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jthoughton.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=WlCdUd61; arc=none smtp.client-ip=209.85.219.74 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--jthoughton.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="WlCdUd61" Received: by mail-qv1-f74.google.com with SMTP id 6a1803df08f44-6d8860ab00dso21474736d6.0 for ; Thu, 09 Jan 2025 12:50:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1736455802; x=1737060602; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=O767jE59AeAMsTglDWemPeR1CkI5EMgHAt7K2sI2JAg=; b=WlCdUd619YU8lYk986ZY4xjT3n6gmOwDPGl5+xf/JRzVAaIN7N9QmlRJx0dlHQ4BxR eX8r/UJ8YTO2Fglf+hSatu3nSIvBc8kN0o4/C1YK5FYVsyeBjmxecijdFVqZTU/BogUf jtbcbgd41FIzi7Tz8wgb9IEs8phkhwf9b6H3PauPzdi3FaKQR/fluydOUL0tJmEEOMRh tFHArHoI3yTVHm64fj1JwlHpkbguH9RnUh2pmvz9hgNSC1lsVh5fDTeJ/f/MzghN8ZXf V3J10OLS1/zvXt4LA6UyHn9fAAsBx/aziEqsNt3v3pNBJOFZTd/v6ZOP74bJJnlj9tD/ RsuQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1736455802; x=1737060602; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=O767jE59AeAMsTglDWemPeR1CkI5EMgHAt7K2sI2JAg=; b=fLqkLJkuY1tt7Eigaz1m5czB2P1+beiH54olSAx0FgsXevHZUUc1Dmmz9pq8UfVPqR HIQWY3zT4cIIp05Kut0/gMlpl9X1QHRvTlodOubqFBte6Y5KL633pTe4+0egd00lJ/ol uOOZ+2Kr7TOgT1EFUkBC2rgskkS3nn3IwANg1AdhQNElSdlzTyRRajQ1XjhMW6F7XWhs fBSuFLhqEiVBRQ998annG3gNUFl5J3lyqPsXs4+wENCzfdzp8D2ED0ZquU9X0pkN/Bzx uvThYvdBD4914nDDwfUIOB5UZsSLfgp1Aci9Kr2ZAjg/l8RSS0gEOLNhpYMc9Q30AexK yvIw== X-Forwarded-Encrypted: i=1; AJvYcCVwsyAPMEKGV0j966ZhxGhkmdsuKkgpLu4K7dq5K/h5VMVOdYRNWg5Xn9obBNQM3CqFNA/Rc38RcQfx8Sk=@vger.kernel.org X-Gm-Message-State: AOJu0YyExK2qmtSoWFOqn5SU28cN6M5jWxXMK15aIk/Rd1aUKAdzQ5o4 k+2c/RzpmtZVSjDJ3fJNAwu203Fa50VWCsoX4YWkLCpO8d0fbn8SktIZ8uD1GHfxumaoPMrvbCO ddBqZ6WTf6DLvAC0zPw== X-Google-Smtp-Source: AGHT+IFgx6gAPenNPcGigBK2pqFto4Hhpu9WmCDI55SJzVOesvWzc1cj0nZb4kbFOEWQTb6nHd4wPYt7OTvCG9XJ X-Received: from qvboq1.prod.google.com ([2002:a05:6214:4601:b0:6d8:f326:1f33]) (user=jthoughton job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6214:2688:b0:6d4:1c9d:4f47 with SMTP id 6a1803df08f44-6df9b238643mr125150226d6.13.1736455802071; Thu, 09 Jan 2025 12:50:02 -0800 (PST) Date: Thu, 9 Jan 2025 20:49:24 +0000 In-Reply-To: <20250109204929.1106563-1-jthoughton@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250109204929.1106563-1-jthoughton@google.com> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Message-ID: <20250109204929.1106563-9-jthoughton@google.com> Subject: [PATCH v2 08/13] KVM: selftests: Fix prefault_mem logic From: James Houghton To: Paolo Bonzini , Sean Christopherson Cc: Jonathan Corbet , Marc Zyngier , Oliver Upton , Yan Zhao , James Houghton , Nikita Kalyazin , Anish Moorthy , Peter Gonda , Peter Xu , David Matlack , wei.w.wang@intel.com, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The previous logic didn't handle the case where memory was partitioned AND we were using a single userfaultfd. It would only prefault the first vCPU's memory and not the rest. Signed-off-by: James Houghton --- tools/testing/selftests/kvm/demand_paging_test.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testi= ng/selftests/kvm/demand_paging_test.c index 0202b78f8680..315f5c9037b4 100644 --- a/tools/testing/selftests/kvm/demand_paging_test.c +++ b/tools/testing/selftests/kvm/demand_paging_test.c @@ -172,11 +172,13 @@ static void run_test(enum vm_guest_mode mode, void *a= rg) memset(guest_data_prototype, 0xAB, demand_paging_size); =20 if (p->uffd_mode =3D=3D UFFDIO_REGISTER_MODE_MINOR) { - num_uffds =3D p->single_uffd ? 1 : nr_vcpus; - for (i =3D 0; i < num_uffds; i++) { + for (i =3D 0; i < nr_vcpus; i++) { vcpu_args =3D &memstress_args.vcpu_args[i]; prefault_mem(addr_gpa2alias(vm, vcpu_args->gpa), vcpu_args->pages * memstress_args.guest_page_size); + if (!p->partition_vcpu_memory_access) + /* We prefaulted everything */ + break; } } =20 --=20 2.47.1.613.gc27f4b7a9f-goog