From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E8CCAF532C0 for ; Mon, 23 Mar 2026 23:59:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=JUFryWFBPXxe6T+DTeCmqMtrNHQ62SSe5LgDU16cd+0=; b=RjD6BU95FIqjmlZn9Q0zq0LBqm lBeN9AxK85oPHJuH6MEoRyChlVk7ZPskgY+6JyxIC6PrJHkPV9Svs4IVB2s98hRGu5zu7EMv8B2DV 6aKuasFvwsPTk+X159K89zuzgXEvHB0GYx/lTzRVcQ12mkvN4fGywYyKxLHvqcUUPO8AOgPGXvYed zvhvoKAVaYbfT6KdNMDPsRCz1HMFQDSzol+VfTJ4rbAR6zympuvSxrZDEcbS2wQrobTZJqtaLka4n NshIhCAJnQNhXc+4iN4AC54mjueV+Vq/GaxMJPrTWB3B7e+kVjRm8NBwBK+USzGMh5JkjY7YAt91O gl7pkIrA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w4pAu-00000000Bny-3eKH; Mon, 23 Mar 2026 23:59:12 +0000 Received: from mail-pj1-x104a.google.com ([2607:f8b0:4864:20::104a]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w4pAs-00000000Bkc-3LWv for kexec@lists.infradead.org; Mon, 23 Mar 2026 23:59:12 +0000 Received: by mail-pj1-x104a.google.com with SMTP id 98e67ed59e1d1-35a1e725a8fso24245724a91.3 for ; Mon, 23 Mar 2026 16:59:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1774310349; x=1774915149; darn=lists.infradead.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=JUFryWFBPXxe6T+DTeCmqMtrNHQ62SSe5LgDU16cd+0=; b=pl6vVfjzbygHGXKpuFEw/Ns13k6zPXAxFq0XD8j9LqpxnKJzT5YxYaBOa4df2RzqiK DLgRoKf2eORl5Pn5ZFmBwFpTridWoJ8dM+jZ3KECItIpXrRuFEBLjKRHvnM+1cIFdzJu o5wT7ur0y4sARP1cCydx19RMcrhEzHqW3SA1VciELi9PdnFwOY6i31+BnXa89UVENSb7 /PM2saTzUUjbx+Y4gljhpERPbvwLdUYBZn9DHqdeChDWP5B0xpNsriQ05Tf1aP2gov83 f3rp66obSM4jCuCZRe8X9beivQisieHid5+NLoY/O1RKkXmgiG3KgcdcUydnZXpdN+nS KFww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774310349; x=1774915149; 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=JUFryWFBPXxe6T+DTeCmqMtrNHQ62SSe5LgDU16cd+0=; b=RKdgzWnqs/piFvf4ebPluY4cnO9QenVuf9dyjQ4yAnnHyJev3OsSVBD94HmLfXi1/D 8n/p2KptVb53WSGc85Yu7MeRwI0E9QsiJpJspBycPRAL4kIcQqVlsnUxhcxuuDscAWM5 t8daO4QHSnwXsoAktY0YmI4+2rxvPT84ih0jjzRf8BdbBxyPpUxBdOY7NP7GL0AVNUap hTor49A8namf6P9er4tvr323EhcDKMle4GheW5h/ypgATiimYRY74n0Qi66e3eTZFM9F uaJmcTRxZRi8B11xvEsULqa0MlKyoF/+BNHRWzEM+dd+thYWqMtuurlXNs2tZYI/PTiq XBsA== X-Forwarded-Encrypted: i=1; AJvYcCVGLUW303xmJ2aCYBhcVDzRUEqnrnGAQQoQTjFpNZjLgDtJZuW5GJrHjIekImfUS2BtXXMRHw==@lists.infradead.org X-Gm-Message-State: AOJu0YxRR8UuC/l/QWp+n9eBkxDOIBrxP01QIluPtZFzfQtm3EUgyjan GBCAUbPtA4b0zjCh2Ja/6W5VFsmHz13p5D8KFGdYpSQ5CfAcOqdy0UgDyppqkwPt4YeiMEINvBx +lW9Em9+P8l68Qg== X-Received: from pjub5.prod.google.com ([2002:a17:90a:cc05:b0:359:f1f1:7bcb]) (user=dmatlack job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:1c08:b0:35b:e519:213b with SMTP id 98e67ed59e1d1-35be5192186mr4242377a91.30.1774310349283; Mon, 23 Mar 2026 16:59:09 -0700 (PDT) Date: Mon, 23 Mar 2026 23:58:10 +0000 In-Reply-To: <20260323235817.1960573-1-dmatlack@google.com> Mime-Version: 1.0 References: <20260323235817.1960573-1-dmatlack@google.com> X-Mailer: git-send-email 2.53.0.983.g0bb29b3bc5-goog Message-ID: <20260323235817.1960573-19-dmatlack@google.com> Subject: [PATCH v3 18/24] vfio: selftests: Add vfio_pci_liveupdate_uapi_test From: David Matlack To: Alex Williamson , Bjorn Helgaas Cc: Adithya Jayachandran , Alexander Graf , Alex Mastro , Andrew Morton , Ankit Agrawal , Arnd Bergmann , Askar Safin , "Borislav Petkov (AMD)" , Chris Li , Dapeng Mi , David Matlack , David Rientjes , Feng Tang , Jacob Pan , Jason Gunthorpe , Jason Gunthorpe , Jonathan Corbet , Josh Hilke , Kees Cook , Kevin Tian , kexec@lists.infradead.org, kvm@vger.kernel.org, Leon Romanovsky , Leon Romanovsky , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Li RongQing , Lukas Wunner , Marco Elver , "=?UTF-8?q?Micha=C5=82=20Winiarski?=" , Mike Rapoport , Parav Pandit , Pasha Tatashin , "Paul E. McKenney" , Pawan Gupta , "Peter Zijlstra (Intel)" , Pranjal Shrivastava , Pratyush Yadav , Raghavendra Rao Ananta , Randy Dunlap , Rodrigo Vivi , Saeed Mahameed , Samiullah Khawaja , Shuah Khan , Vipin Sharma , Vivek Kasireddy , William Tu , Yi Liu , Zhu Yanjun Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260323_165910_875158_D1D5F09E X-CRM114-Status: GOOD ( 16.14 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org Add a selftest to exercise preserving a various VFIO files through /dev/liveupdate. Ensure that VFIO cdev device files can be preserved and everything else (group-based device files, group files, and container files) all fail. Signed-off-by: David Matlack --- tools/testing/selftests/vfio/Makefile | 1 + .../vfio/vfio_pci_liveupdate_uapi_test.c | 93 +++++++++++++++++++ 2 files changed, 94 insertions(+) create mode 100644 tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test.c diff --git a/tools/testing/selftests/vfio/Makefile b/tools/testing/selftests/vfio/Makefile index 9d5e390a61b7..5b6e79593555 100644 --- a/tools/testing/selftests/vfio/Makefile +++ b/tools/testing/selftests/vfio/Makefile @@ -12,6 +12,7 @@ TEST_GEN_PROGS += vfio_iommufd_setup_test TEST_GEN_PROGS += vfio_pci_device_test TEST_GEN_PROGS += vfio_pci_device_init_perf_test TEST_GEN_PROGS += vfio_pci_driver_test +TEST_GEN_PROGS += vfio_pci_liveupdate_uapi_test TEST_FILES += scripts/cleanup.sh TEST_FILES += scripts/lib.sh diff --git a/tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test.c b/tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test.c new file mode 100644 index 000000000000..1d89b08ab0a4 --- /dev/null +++ b/tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include +#include + +static const char *device_bdf; + +FIXTURE(vfio_pci_liveupdate_uapi_test) { + int luo_fd; + int session_fd; + struct iommu *iommu; + struct vfio_pci_device *device; +}; + +FIXTURE_VARIANT(vfio_pci_liveupdate_uapi_test) { + const char *iommu_mode; +}; + +#define FIXTURE_VARIANT_ADD_IOMMU_MODE(_iommu_mode) \ +FIXTURE_VARIANT_ADD(vfio_pci_liveupdate_uapi_test, _iommu_mode) { \ + .iommu_mode = #_iommu_mode, \ +} + +FIXTURE_VARIANT_ADD_ALL_IOMMU_MODES(); +#undef FIXTURE_VARIANT_ADD_IOMMU_MODE + +FIXTURE_SETUP(vfio_pci_liveupdate_uapi_test) +{ + self->luo_fd = luo_open_device(); + ASSERT_GE(self->luo_fd, 0); + + self->session_fd = luo_create_session(self->luo_fd, "session"); + ASSERT_GE(self->session_fd, 0); + + self->iommu = iommu_init(variant->iommu_mode); + self->device = vfio_pci_device_init(device_bdf, self->iommu); +} + +FIXTURE_TEARDOWN(vfio_pci_liveupdate_uapi_test) +{ + vfio_pci_device_cleanup(self->device); + iommu_cleanup(self->iommu); + close(self->session_fd); + close(self->luo_fd); +} + +TEST_F(vfio_pci_liveupdate_uapi_test, preserve_device) +{ + int ret; + + ret = luo_session_preserve_fd(self->session_fd, self->device->fd, 0); + + /* Preservation should only be supported for VFIO cdev files. */ + ASSERT_EQ(ret, self->iommu->iommufd ? 0 : -ENOENT); +} + +TEST_F(vfio_pci_liveupdate_uapi_test, preserve_group_fails) +{ + int ret; + + if (self->iommu->iommufd) + SKIP(return, "iommufd-mode does not have group files"); + + ret = luo_session_preserve_fd(self->session_fd, self->device->group_fd, 0); + ASSERT_EQ(ret, -ENOENT); +} + +TEST_F(vfio_pci_liveupdate_uapi_test, preserve_container_fails) +{ + int ret; + + if (self->iommu->iommufd) + SKIP(return, "iommufd-mode does not have container files"); + + ret = luo_session_preserve_fd(self->session_fd, self->iommu->container_fd, 0); + ASSERT_EQ(ret, -ENOENT); +} + +int main(int argc, char *argv[]) +{ + int fd; + + fd = luo_open_device(); + if (fd < 0) + ksft_exit_skip("open(%s) failed: %s, skipping\n", + LUO_DEVICE, strerror(errno)); + + close(fd); + + device_bdf = vfio_selftests_get_bdf(&argc, argv); + return test_harness_run(argc, argv); +} -- 2.53.0.983.g0bb29b3bc5-goog