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virpcimock: Create symlink in /sys/kernel/iommu_groups/N/devices dir

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So far, we don't need to create anything under
/sys/kernel/iommu_groups/N/devices directory (which is symlinked
from /sys/bus/pci/devices/DDDD:BB:DD.F/iommu_group directory)
because virhostdevtest still tests the old KVM assignment and
thus has no notion of IOMMU groups. This will change in near
future though. And in order to discover devices belonging to the
same IOMMU group we need to do what kernel does - create symlinks
to devices.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Tested-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Michal Privoznik 2019-08-13 17:10:50 +02:00
parent 6a966aac9d
commit 324b576c0c
1 changed files with 25 additions and 7 deletions
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32
tests/virpcimock.c
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@ -401,6 +401,30 @@ pci_device_get_path(const struct pciDevice *dev,
} }
static void
pci_device_create_iommu(const struct pciDevice *dev,
const char *devid)
{
VIR_AUTOFREE(char *) iommuPath = NULL;
char tmp[256];
if (virAsprintfQuiet(&iommuPath, "%s/sys/kernel/iommu_groups/%d/devices/",
fakerootdir, dev->iommuGroup) < 0)
ABORT_OOM();
if (virFileMakePath(iommuPath) < 0)
ABORT("Unable to create: %s", iommuPath);
if (snprintf(tmp, sizeof(tmp),
"../../../../devices/pci%04x:%02x/%s",
dev->addr.domain, dev->addr.bus, devid) < 0) {
ABORT("@tmp overflow");
}
make_symlink(iommuPath, devid, tmp);
}
static void static void
pci_device_new_from_stub(const struct pciDevice *data) pci_device_new_from_stub(const struct pciDevice *data)
{ {
@ -481,13 +505,7 @@ pci_device_new_from_stub(const struct pciDevice *data)
make_file(devpath, "driver_override", NULL, -1); make_file(devpath, "driver_override", NULL, -1);
if (snprintf(tmp, sizeof(tmp), pci_device_create_iommu(dev, devid);
"%s/../../../kernel/iommu_groups/%d",
devpath, dev->iommuGroup) < 0) {
ABORT("@tmp overflow");
}
if (virFileMakePath(tmp) < 0)
ABORT("Unable to create %s", tmp);
if (snprintf(tmp, sizeof(tmp), if (snprintf(tmp, sizeof(tmp),
"../../../kernel/iommu_groups/%d", dev->iommuGroup) < 0) { "../../../kernel/iommu_groups/%d", dev->iommuGroup) < 0) {