From nobody Mon Feb 9 07:21:56 2026 Received: from mail-oo1-f74.google.com (mail-oo1-f74.google.com [209.85.161.74]) (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 F3604202C3E for ; Wed, 4 Dec 2024 19:14:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733339666; cv=none; b=e71Tj9BkT4gx6ow3UOMGjweHkm5agUNGHSJjgw7x+q6qhAvbEU55TllZsjCAqIbeXTX7ZZyMO3SkwcUVDxxFYpoBzkCpUTOQMiPLB+J8xo//Rf4qMoGBRr8nmIAcdRtMh5//0FTLTwDEq19h1PklFLNNAT+Dd/t6q8xECU22F+g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733339666; c=relaxed/simple; bh=g0rkDGLpu4v+ug31ibm4fJibfbopHH42jmhVi9EOmqs=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=YgGlcwRjSG6zm5PjrYXmygKfOnIfOTbXoxNYf72q7AKZuUxklt9tCazusuAKemKyA/t8znB7QvMHFQhUJiaTP/9LsRFhIm34wjLU3MBcgFnJA44o4gLx+/Vco5UV18bwKzqo0NFh3LxPuEyURusSqlYzPD9icqxnRe/QYUasvS0= 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=Va4w2hA+; arc=none smtp.client-ip=209.85.161.74 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="Va4w2hA+" Received: by mail-oo1-f74.google.com with SMTP id 006d021491bc7-5f2033c97cfso118424eaf.3 for ; Wed, 04 Dec 2024 11:14:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1733339663; x=1733944463; 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=zFzCtU30qR2oi/Is6fdl592GY3fZRLXfeluJtZi8G84=; b=Va4w2hA+uWJh+kB1R8xnR1i0iaMi6BjrdFaDRcbvZyPJGCmNwdYyf7bTwTHdYq0cFi j35iNpYKEftFzvCpL8twNGARFLc8Sm/SZ5SiFJoH6207g4BvSdcGqhpxvk6J/qWfTScn B5TSb/vi3sPD7axxPeHmH2DCtDXQ33kr0XyJOWnnYn0oN2WNt9PlxBDmH0ofuEVWEL5o a2Ji22A9CzQjX3ajlFgf37s0zqJCQo6nQdapFEFMYwdtJNUzkNH3waahXw5H6OPOK//q Z80MAY/imeKmrkb7frsWZtW1b4cXuC1/J6AAyOtkaHjBS1nfdVeIW1IWQKcfLrxvIPnp AviQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733339663; x=1733944463; 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=zFzCtU30qR2oi/Is6fdl592GY3fZRLXfeluJtZi8G84=; b=sQNBGBfuYLCCflTZ7GQgut3hESNPtuWmJoZALI6eeKgjEPup6VuMoExlHhKABZd+3D UaGBFzN0tiHW++bcIzP20DMTaKEvrDIXdqBOCoAz+k0V1aLVz23ZPtYgrQR6q7Rxz+2M t8yPl80LYgvyDqYW75g3LYre3N/iWcG8krYYIJuzWdecrf98SE4AKVNUsA7TQWi9Y1XD +cQGXnqD1H+jCX6X/9R8388Ia64a6Orbgu3xOEc517t8BneStbOX0GIwq9Edq/sDLkA2 DNuX8BpoDDtZ6CZkm/6wuQyhluWUGPvkx37OAfhK+Os5iOpnN4JkoxqN3Fu0Vb7UCINi A+XQ== X-Forwarded-Encrypted: i=1; AJvYcCXq7TfWp/Ri6UEYRzGaLpYVns9DwiGSaPDItn45tyLnfwjgET7lE9kQG3++lgUcqpuh9skrxpPvov8aISU=@vger.kernel.org X-Gm-Message-State: AOJu0YysRRLOW+HQgsD9m5b80xp0woGfq5IwRgpXKqWRCoz0s6WBb/d1 2yGoyhRKGypznJv5/wgy6/PLvyTSHA/mnK0+RcBi10rDFEc/T00txwi8R/XV5YYlPkiYSxh3XE/ YQXS4T8z4PQkzAImk/A== X-Google-Smtp-Source: AGHT+IE0Bvu2wb5sZ62wPHnkPebE9DLvFVJFuHpqNaMFqI9+9IIU97LvrniH728q/X5uxBPvfLsjs32/EpieLb++ X-Received: from uad11.prod.google.com ([2002:a05:6130:800b:b0:855:e8c8:6d6c]) (user=jthoughton job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6218:2812:b0:1bc:45bc:81f0 with SMTP id e5c5f4694b2df-1caeaab608amr694161055d.11.1733339663073; Wed, 04 Dec 2024 11:14:23 -0800 (PST) Date: Wed, 4 Dec 2024 19:13:43 +0000 In-Reply-To: <20241204191349.1730936-1-jthoughton@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241204191349.1730936-1-jthoughton@google.com> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog Message-ID: <20241204191349.1730936-9-jthoughton@google.com> Subject: [PATCH v1 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 , Wang@google.com, Wei W , 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 2.47.0.338.g60cca15819-goog