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Message-ID: <20260129212510.967611-21-dmatlack@google.com>
Date: Thu, 29 Jan 2026 21:25:07 +0000
From: David Matlack <dmatlack@...gle.com>
To: Alex Williamson <alex@...zbot.org>
Cc: Adithya Jayachandran <ajayachandra@...dia.com>, Alexander Graf <graf@...zon.com>,
Alex Mastro <amastro@...com>, Alistair Popple <apopple@...dia.com>,
Andrew Morton <akpm@...ux-foundation.org>, Ankit Agrawal <ankita@...dia.com>,
Bjorn Helgaas <bhelgaas@...gle.com>, Chris Li <chrisl@...nel.org>,
David Matlack <dmatlack@...gle.com>, David Rientjes <rientjes@...gle.com>,
Jacob Pan <jacob.pan@...ux.microsoft.com>, Jason Gunthorpe <jgg@...dia.com>,
Jason Gunthorpe <jgg@...pe.ca>, Jonathan Corbet <corbet@....net>, Josh Hilke <jrhilke@...gle.com>,
Kevin Tian <kevin.tian@...el.com>, kexec@...ts.infradead.org, kvm@...r.kernel.org,
Leon Romanovsky <leon@...nel.org>, Leon Romanovsky <leonro@...dia.com>, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-mm@...ck.org, linux-pci@...r.kernel.org, Lukas Wunner <lukas@...ner.de>,
"Michał Winiarski" <michal.winiarski@...el.com>, Mike Rapoport <rppt@...nel.org>,
Parav Pandit <parav@...dia.com>, Pasha Tatashin <pasha.tatashin@...een.com>,
Pranjal Shrivastava <praan@...gle.com>, Pratyush Yadav <pratyush@...nel.org>,
Raghavendra Rao Ananta <rananta@...gle.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>,
Saeed Mahameed <saeedm@...dia.com>, Samiullah Khawaja <skhawaja@...gle.com>,
Shuah Khan <skhan@...uxfoundation.org>,
"Thomas Hellström" <thomas.hellstrom@...ux.intel.com>, Tomita Moeko <tomitamoeko@...il.com>,
Vipin Sharma <vipinsh@...gle.com>, Vivek Kasireddy <vivek.kasireddy@...el.com>,
William Tu <witu@...dia.com>, Yi Liu <yi.l.liu@...el.com>, Zhu Yanjun <yanjun.zhu@...ux.dev>
Subject: [PATCH v2 20/22] vfio: selftests: Expose low-level helper routines
for setting up struct vfio_pci_device
Expose a few low-level helper routings for setting up vfio_pci_device
structs. These routines will be used in a subsequent commit to assert
that VFIO_GROUP_GET_DEVICE_FD fails under certain conditions.
Signed-off-by: David Matlack <dmatlack@...gle.com>
---
.../lib/include/libvfio/vfio_pci_device.h | 5 +++
.../selftests/vfio/lib/vfio_pci_device.c | 33 +++++++++++++------
2 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_device.h b/tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_device.h
index 896dfde88118..2389c7698335 100644
--- a/tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_device.h
+++ b/tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_device.h
@@ -125,4 +125,9 @@ static inline bool vfio_pci_device_match(struct vfio_pci_device *device,
const char *vfio_pci_get_cdev_path(const char *bdf);
+/* Low-level routines for setting up a struct vfio_pci_device */
+struct vfio_pci_device *vfio_pci_device_alloc(const char *bdf, struct iommu *iommu);
+void vfio_pci_group_setup(struct vfio_pci_device *device);
+void vfio_pci_iommu_setup(struct vfio_pci_device *device);
+
#endif /* SELFTESTS_VFIO_LIB_INCLUDE_LIBVFIO_VFIO_PCI_DEVICE_H */
diff --git a/tools/testing/selftests/vfio/lib/vfio_pci_device.c b/tools/testing/selftests/vfio/lib/vfio_pci_device.c
index 08bb582eaa8f..76597c84e956 100644
--- a/tools/testing/selftests/vfio/lib/vfio_pci_device.c
+++ b/tools/testing/selftests/vfio/lib/vfio_pci_device.c
@@ -198,7 +198,7 @@ static unsigned int vfio_pci_get_group_from_dev(const char *bdf)
return group;
}
-static void vfio_pci_group_setup(struct vfio_pci_device *device, const char *bdf)
+void vfio_pci_group_setup(struct vfio_pci_device *device)
{
struct vfio_group_status group_status = {
.argsz = sizeof(group_status),
@@ -206,7 +206,7 @@ static void vfio_pci_group_setup(struct vfio_pci_device *device, const char *bdf
char group_path[32];
int group;
- group = vfio_pci_get_group_from_dev(bdf);
+ group = vfio_pci_get_group_from_dev(device->bdf);
snprintf(group_path, sizeof(group_path), "/dev/vfio/%d", group);
device->group_fd = open(group_path, O_RDWR);
@@ -218,14 +218,12 @@ static void vfio_pci_group_setup(struct vfio_pci_device *device, const char *bdf
ioctl_assert(device->group_fd, VFIO_GROUP_SET_CONTAINER, &device->iommu->container_fd);
}
-static void vfio_pci_container_setup(struct vfio_pci_device *device, const char *bdf)
+void vfio_pci_iommu_setup(struct vfio_pci_device *device)
{
struct iommu *iommu = device->iommu;
unsigned long iommu_type = iommu->mode->iommu_type;
int ret;
- vfio_pci_group_setup(device, bdf);
-
ret = ioctl(iommu->container_fd, VFIO_CHECK_EXTENSION, iommu_type);
VFIO_ASSERT_GT(ret, 0, "VFIO IOMMU type %lu not supported\n", iommu_type);
@@ -235,8 +233,14 @@ static void vfio_pci_container_setup(struct vfio_pci_device *device, const char
* because the IOMMU type is already set.
*/
(void)ioctl(iommu->container_fd, VFIO_SET_IOMMU, (void *)iommu_type);
+}
- device->fd = ioctl(device->group_fd, VFIO_GROUP_GET_DEVICE_FD, bdf);
+static void vfio_pci_container_setup(struct vfio_pci_device *device)
+{
+ vfio_pci_group_setup(device);
+ vfio_pci_iommu_setup(device);
+
+ device->fd = ioctl(device->group_fd, VFIO_GROUP_GET_DEVICE_FD, device->bdf);
VFIO_ASSERT_GE(device->fd, 0);
}
@@ -336,9 +340,7 @@ static void vfio_pci_iommufd_setup(struct vfio_pci_device *device,
vfio_device_attach_iommufd_pt(device->fd, device->iommu->ioas_id);
}
-struct vfio_pci_device *__vfio_pci_device_init(const char *bdf,
- struct iommu *iommu,
- int device_fd)
+struct vfio_pci_device *vfio_pci_device_alloc(const char *bdf, struct iommu *iommu)
{
struct vfio_pci_device *device;
@@ -349,9 +351,20 @@ struct vfio_pci_device *__vfio_pci_device_init(const char *bdf,
device->iommu = iommu;
device->bdf = bdf;
+ return device;
+}
+
+struct vfio_pci_device *__vfio_pci_device_init(const char *bdf,
+ struct iommu *iommu,
+ int device_fd)
+{
+ struct vfio_pci_device *device;
+
+ device = vfio_pci_device_alloc(bdf, iommu);
+
if (iommu->mode->container_path) {
VFIO_ASSERT_EQ(device_fd, -1);
- vfio_pci_container_setup(device, bdf);
+ vfio_pci_container_setup(device);
} else {
vfio_pci_iommufd_setup(device, bdf, device_fd);
}
--
2.53.0.rc1.225.gd81095ad13-goog
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