From nobody Mon Dec 1 22:34:46 2025 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (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 68C842EE60B for ; Wed, 26 Nov 2025 23:17:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764199068; cv=none; b=aegDpTOv+qIGfktyQ9IhtFjdmt5Pv0i0Ayf7GTWiljHrcXo/2vzSDklThRiKPAqBJLU9W1kVy/pDEFqZbXXNoJbDTG1IGqTRTfaeWE2piynGSm+p5beC2nCJCscO+kabcCACVSo8E4vJdTQy468G9PMyGRiPX4PhbRtUnkoX+TI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764199068; c=relaxed/simple; bh=AvSFNKiKL+c7A+jWVKE0Bg18iz3X2ZUYRCg6aF1PgR4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=MgD143UtoZSKfSQnf/NLfc43PzuOMZRGKZUV/n1QCGvH+swW/rHth1TMUO8rMLj/XkS17oalqCny1cwd40/DXWf4jvsEC8jDOOeikayDEe7EPbOxfMGtNVU4M59f4Y9sGPlhQe8gShMBaZ/chTNQfEv0vwG74ErbI5wWmwa5m0c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--dmatlack.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=rLcrkCNb; arc=none smtp.client-ip=209.85.210.201 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--dmatlack.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="rLcrkCNb" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-7b80de683efso353741b3a.3 for ; Wed, 26 Nov 2025 15:17:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1764199067; x=1764803867; 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=2NmqlILt/SIZo48TbaGQlmIwJAUYztjRVDmwIOHsj6Y=; b=rLcrkCNb0Qi94JuYAhH244e6Kr3e44p9lGcPro1K2c8iiX0iL88o6qtJqIFYFm1wDh s0C8h8TJHWYh+W5UPgVSkYasPPrPBVSv7yobkQwhE6oN+thUELA8URoZ0Qq1UjL9zyNC uEZ9mrI0TEXEAZ7Zxtl9zemUkdw2RFRt4NkxHLA7OrJhqb+GXbTbCxvHyiFeOTnZ967p GC6N/lTtKx6nEdvC2NVtzoyD2sJKvrwA9KYl4SzfUENpYNf0egcoBWGon5GqsjaEzxgJ P/PgQegCfv31AYb4rx2r4NjLq6nYoY/pU2L5+I+E7vWtRJzM6kd4jFHRiEjj6wExMRjI F0HQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764199067; x=1764803867; 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=2NmqlILt/SIZo48TbaGQlmIwJAUYztjRVDmwIOHsj6Y=; b=G8YLilXbRT6U+YkwLdpklQYtqEiJKWA5P3/1q4xo4tInxPZKLhVLttiRkYh6KpgEgW emGpAQLlhijqYYlhQEx0xNArWLbtdR82pEqvoVd8xvuOaW94zBKpWo2mVeAbJOvN7EXA anouU5pNFx+V88NetQfWRrkooSsrTIILlpf2qSIBDV1aIUtEiHTuYwutdNREsO4SYkaJ gqPzN+oC2PCsqVaohdzm8eyxoM9R3uRTNorzEF4SffVZywE6MPce8Y6v/cVy1+IZeOCV fJofn11dOwMtlwzkF8tFZuaVY6w8ONg5Mex3afrDVLxXHM6EC2BcJYAuLmXO+MxzlBOP rV2w== X-Forwarded-Encrypted: i=1; AJvYcCU/pkamOaX4CKar9MovUETc7FsKas5ru3TTHXIvU/AZuTYp4yWkRSgCyze14Ohrd6pFYPob38EA93gv5Nc=@vger.kernel.org X-Gm-Message-State: AOJu0Yyl8Tq4xw5y6d6qjKy7QUVr1J8SdFiQD9ZYDmE/zh2o5o0lMCwf ItexhSP4lqpnxX4DeETs7kw5uxOgo9NQSGJhlDBn9D6o/A4Q5Zvnjn+QNeNFTE3x9MWNHBUsDwx DJYfRmIq7MwVKLQ== X-Google-Smtp-Source: AGHT+IFe/Mo3B5TgFhtPN43rvpR/V3Sb3frYIJR1W12Kqz3wnQ9iJPaORUJ41nbeEG+8jvATbp+GIwQQjnw/uw== X-Received: from pfbhj14.prod.google.com ([2002:a05:6a00:870e:b0:77d:4a42:1179]) (user=dmatlack job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:390d:b0:7aa:9e4d:b693 with SMTP id d2e1a72fcca58-7c58e113a8amr24159761b3a.17.1764199066615; Wed, 26 Nov 2025 15:17:46 -0800 (PST) Date: Wed, 26 Nov 2025 23:17:18 +0000 In-Reply-To: <20251126231733.3302983-1-dmatlack@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251126231733.3302983-1-dmatlack@google.com> X-Mailer: git-send-email 2.52.0.487.g5c8c507ade-goog Message-ID: <20251126231733.3302983-4-dmatlack@google.com> Subject: [PATCH v4 03/18] vfio: selftests: Allow passing multiple BDFs on the command line From: David Matlack To: Alex Williamson Cc: Alex Mastro , David Matlack , Jason Gunthorpe , Josh Hilke , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Raghavendra Rao Ananta , Vipin Sharma Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support for passing multiple device BDFs to a test via the command line. This is a prerequisite for multi-device tests. Single-device tests can continue using vfio_selftests_get_bdf(), which will continue to return argv[argc - 1] (if it is a BDF string), or the environment variable $VFIO_SELFTESTS_BDF otherwise. For multi-device tests, a new helper called vfio_selftests_get_bdfs() is introduced which will return an array of all BDFs found at the end of argv[], as well as the number of BDFs found (passed back to the caller via argument). The array of BDFs returned does not need to be freed by the caller. The environment variable VFIO_SELFTESTS_BDF continues to support only a single BDF for the time being. Reviewed-by: Alex Mastro Tested-by: Alex Mastro Reviewed-by: Raghavendra Rao Ananta Signed-off-by: David Matlack --- .../selftests/vfio/lib/include/vfio_util.h | 2 + .../selftests/vfio/lib/vfio_pci_device.c | 57 +++++++++++++++---- 2 files changed, 48 insertions(+), 11 deletions(-) diff --git a/tools/testing/selftests/vfio/lib/include/vfio_util.h b/tools/t= esting/selftests/vfio/lib/include/vfio_util.h index 69ec0c856481..0b9a5628d23e 100644 --- a/tools/testing/selftests/vfio/lib/include/vfio_util.h +++ b/tools/testing/selftests/vfio/lib/include/vfio_util.h @@ -208,6 +208,8 @@ struct iova_allocator { * If BDF cannot be determined then the test will exit with KSFT_SKIP. */ const char *vfio_selftests_get_bdf(int *argc, char *argv[]); +char **vfio_selftests_get_bdfs(int *argc, char *argv[], int *nr_bdfs); + const char *vfio_pci_get_cdev_path(const char *bdf); =20 extern const char *default_iommu_mode; diff --git a/tools/testing/selftests/vfio/lib/vfio_pci_device.c b/tools/tes= ting/selftests/vfio/lib/vfio_pci_device.c index b479a359da12..eda8f14de797 100644 --- a/tools/testing/selftests/vfio/lib/vfio_pci_device.c +++ b/tools/testing/selftests/vfio/lib/vfio_pci_device.c @@ -868,29 +868,64 @@ static bool is_bdf(const char *str) return count =3D=3D 4 && length =3D=3D strlen(str); } =20 -const char *vfio_selftests_get_bdf(int *argc, char *argv[]) +static char **get_bdfs_cmdline(int *argc, char *argv[], int *nr_bdfs) { - char *bdf; + int i; =20 - if (*argc > 1 && is_bdf(argv[*argc - 1])) - return argv[--(*argc)]; + for (i =3D *argc - 1; i > 0 && is_bdf(argv[i]); i--) + continue; + + i++; + *nr_bdfs =3D *argc - i; + *argc -=3D *nr_bdfs; + + return *nr_bdfs ? &argv[i] : NULL; +} + +static char *get_bdf_env(void) +{ + char *bdf; =20 bdf =3D getenv("VFIO_SELFTESTS_BDF"); - if (bdf) { - VFIO_ASSERT_TRUE(is_bdf(bdf), "Invalid BDF: %s\n", bdf); - return bdf; + if (!bdf) + return NULL; + + VFIO_ASSERT_TRUE(is_bdf(bdf), "Invalid BDF: %s\n", bdf); + return bdf; +} + +char **vfio_selftests_get_bdfs(int *argc, char *argv[], int *nr_bdfs) +{ + static char *env_bdf; + char **bdfs; + + bdfs =3D get_bdfs_cmdline(argc, argv, nr_bdfs); + if (bdfs) + return bdfs; + + env_bdf =3D get_bdf_env(); + if (env_bdf) { + *nr_bdfs =3D 1; + return &env_bdf; } =20 - fprintf(stderr, "Unable to determine which device to use, skipping test.\= n"); + fprintf(stderr, "Unable to determine which device(s) to use, skipping tes= t.\n"); fprintf(stderr, "\n"); fprintf(stderr, "To pass the device address via environment variable:\n"); fprintf(stderr, "\n"); - fprintf(stderr, " export VFIO_SELFTESTS_BDF=3Dsegment:bus:device.funct= ion\n"); + fprintf(stderr, " export VFIO_SELFTESTS_BDF=3D\"segment:bus:device.fun= ction\"\n"); fprintf(stderr, " %s [options]\n", argv[0]); fprintf(stderr, "\n"); - fprintf(stderr, "To pass the device address via argv:\n"); + fprintf(stderr, "To pass the device address(es) via argv:\n"); fprintf(stderr, "\n"); - fprintf(stderr, " %s [options] segment:bus:device.function\n", argv[0]= ); + fprintf(stderr, " %s [options] segment:bus:device.function ...\n", arg= v[0]); fprintf(stderr, "\n"); exit(KSFT_SKIP); } + +const char *vfio_selftests_get_bdf(int *argc, char *argv[]) +{ + int nr_bdfs; + + return vfio_selftests_get_bdfs(argc, argv, &nr_bdfs)[0]; +} --=20 2.52.0.487.g5c8c507ade-goog