From nobody Mon Dec 1 23:06:44 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 5847C3469F3 for ; Wed, 26 Nov 2025 19:36:35 +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=1764185797; cv=none; b=JrmJN35JfiSrNxDFbbpBsp3y8fxcc+CEfrSgxQ0qQU9O5pQ1DIti4ppFhEYLVk2x9rjhOoFOpvQT+IGWlOVaYNLjT0j1P8PgI85k1vkJB3R8LyXxigYk/q6MhW0gJyKujK8jGr3Zji2vNKaDZvE9bFzE+SYKID8PKaHCr3qnqNE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764185797; c=relaxed/simple; bh=vBI+BcPeBVK4GSwEmi25dYSa3GjI0+koQ6NIxM3yr7I=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=RABaJuJupkEdQX0fFOd4lQlBNkHya8qLcDNOOz6eWVjdMJ9t1+yg3NmAV+/t0TddpjaUZB/uGTyJ0/DTkvlBUELN5beLZ9DvdUVow6offBrm1ZjYsQDZK8MGiEvIaY5+jlTtziHeInyvCaINUF9nBZaFSDsOibmkpzVp3ar5E3o= 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=RvtO+qoB; 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="RvtO+qoB" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-7ba9c366057so182336b3a.1 for ; Wed, 26 Nov 2025 11:36:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1764185794; x=1764790594; 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=JlttO+kP+T+xZD5DVn0EpdpTFcNTZGOHePuSNnW/JoA=; b=RvtO+qoBrysg8qXH+T1HcibT/haYUCXdYRZzrf+VRexDeAoIGQoHBl1kMqo4HBnMG2 8SDdxIj2SfP85X6DHNUYKI6NQ+HmELeu01y9/JjkS1kA0m4QxWam7p6OijuuSyTWmKX3 +HPPTvwdNSUkWHjNCfyS5772Nm3pn0nHsEy4AiT1iIPOk++NOFy3QU21LtS53LcabZ0h WjLafKukrIFarSkIuAfS8qf3k0c0xy/rth2+7JWfML1Pw+A6WKXSfTRLz90Zbx2WUcLc szmooieqXrzroM7+C8PZyDGbcHa/Cx2ayhs86kGqK1Pi2lmDYLnrEIfciCa4gCt62IlO 1fow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764185794; x=1764790594; 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=JlttO+kP+T+xZD5DVn0EpdpTFcNTZGOHePuSNnW/JoA=; b=OHdlalGftLiNbyrUBAwAulc0KDXbFwGp1Xc+lQvJSVvPDeWqfbayrCKb9JBjCkb71b Vjpo5R3ZFIGOf89hvZ+zyyJ9B3zfCX5nqPHLttcNLesVVgjl2vH4ZtwSvajaaOWclnti mbCs5Vseb2SfCPw9/cDxPbPcUCQfVOWX4vfdzlY+xPe+90RcZCMMTvx+IsAq4dxVP3IM zvL+sDBjcw3p6RXgoT5KwBokUeEZ+Q9ot3qrQVjGfr09oJaf2/QqowkTcdL968D6F3Tt rn/uCalrInZXNwRGEsiSyAln6w8Ww1HKJ2Hc0oxjwtSlesfeHoRWsN4yHtm+65nXidTn P+GQ== X-Forwarded-Encrypted: i=1; AJvYcCU+lbVQ9J8QUgEI3hoGFQGCt8PC1PWOmmzveomnujiW+S1gViBfGD3eKIVTFyOZNuHLM3dbo5iTP++uYGo=@vger.kernel.org X-Gm-Message-State: AOJu0Yw0U6V4SYTXu1v9MAFUAvDAAxv39bzwFvI+yFHzmWXiq5trPMcr r+cCkEOWNYmw+aONQUnfUoR1q0LihqlmTPReoiPOqMZc864ePrMH/ysrE+bWsG5wO7/c0BWx8lg +M0X7Y9mzwVmcuQ== X-Google-Smtp-Source: AGHT+IGfJFqnQcEqTjyto3NMliFrj7gIasa9HojRwUWAbHy3ogFhO2JBnuthvTdBNfMOSov8pJvPknTpGK+cJQ== X-Received: from pfbfj40.prod.google.com ([2002:a05:6a00:3a28:b0:781:1659:e630]) (user=dmatlack job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:23d5:b0:7b8:758c:7e7f with SMTP id d2e1a72fcca58-7ca877f7eabmr8568252b3a.7.1764185794404; Wed, 26 Nov 2025 11:36:34 -0800 (PST) Date: Wed, 26 Nov 2025 19:36:02 +0000 In-Reply-To: <20251126193608.2678510-1-dmatlack@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251126193608.2678510-1-dmatlack@google.com> X-Mailer: git-send-email 2.52.0.487.g5c8c507ade-goog Message-ID: <20251126193608.2678510-16-dmatlack@google.com> Subject: [PATCH 15/21] vfio: selftests: Add vfio_pci_liveupdate_uapi_test From: David Matlack To: Alex Williamson Cc: Adithya Jayachandran , Alex Mastro , Alistair Popple , Andrew Morton , Bjorn Helgaas , Chris Li , David Matlack , David Rientjes , Jacob Pan , Jason Gunthorpe , Jason Gunthorpe , Josh Hilke , Kevin Tian , kvm@vger.kernel.org, Leon Romanovsky , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-pci@vger.kernel.org, Lukas Wunner , Mike Rapoport , Parav Pandit , Pasha Tatashin , Philipp Stanner , Pratyush Yadav , Saeed Mahameed , Samiullah Khawaja , Shuah Khan , Tomita Moeko , Vipin Sharma , William Tu , Yi Liu , Yunxiang Li , Zhu Yanjun Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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_t= est.c diff --git a/tools/testing/selftests/vfio/Makefile b/tools/testing/selftest= s/vfio/Makefile index 424649049d94..9b2a4f10c558 100644 --- a/tools/testing/selftests/vfio/Makefile +++ b/tools/testing/selftests/vfio/Makefile @@ -4,6 +4,7 @@ TEST_GEN_PROGS +=3D vfio_iommufd_setup_test TEST_GEN_PROGS +=3D vfio_pci_device_test TEST_GEN_PROGS +=3D vfio_pci_device_init_perf_test TEST_GEN_PROGS +=3D vfio_pci_driver_test +TEST_GEN_PROGS +=3D vfio_pci_liveupdate_uapi_test =20 TEST_PROGS_EXTENDED :=3D scripts/cleanup.sh TEST_PROGS_EXTENDED :=3D 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..3b4276b2532c --- /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 =3D #_iommu_mode, \ +} + +FIXTURE_VARIANT_ADD_ALL_IOMMU_MODES(); +#undef FIXTURE_VARIANT_ADD_IOMMU_MODE + +FIXTURE_SETUP(vfio_pci_liveupdate_uapi_test) +{ + self->luo_fd =3D luo_open_device(); + ASSERT_GE(self->luo_fd, 0); + + self->session_fd =3D luo_create_session(self->luo_fd, "session"); + ASSERT_GE(self->session_fd, 0); + + self->iommu =3D iommu_init(variant->iommu_mode); + self->device =3D 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 =3D 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) + return; + + ret =3D 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) + return; + + ret =3D 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 =3D luo_open_device(); + if (fd < 0) { + printf("open(%s) failed: %s, skipping\n", LUO_DEVICE, strerror(errno)); + return KSFT_SKIP; + } + close(fd); + + device_bdf =3D vfio_selftests_get_bdf(&argc, argv); + return test_harness_run(argc, argv); +} --=20 2.52.0.487.g5c8c507ade-goog