From aa8c64443e0f8dfdd0d304372e68a2b50543f1bc Mon Sep 17 00:00:00 2001 Message-ID: From: Pavel Hrdina Date: Wed, 18 Mar 2026 17:59:01 +0100 Subject: [PATCH] qemu: Implement iommufd From: Pavel Hrdina Ideally this should be done in qemuDomainHostdevDefPostParse but that would require a lot of refactoring mainly due to how interface backed by hostdev works. Signed-off-by: Pavel Hrdina Reviewed-by: Peter Krempa (cherry picked from commit fc516031ed865f78d590068424ada19a941046ba) Resolves: https://redhat.atlassian.net/browse/VOYAGER-309 Signed-off-by: Pavel Hrdina --- src/qemu/qemu_domain.c | 12 +++++++++--- src/qemu/qemu_domain.h | 3 ++- src/qemu/qemu_hotplug.c | 2 +- src/qemu/qemu_process.c | 4 ++-- 4 files changed, 14 insertions(+), 7 deletions(-) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index a61939aa15..495cbd4f7d 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -10120,10 +10120,12 @@ qemuDomainPrepareHostdevSCSI(virDomainHostdevDef *hostdev, static int -qemuDomainPrepareHostdevPCI(virDomainHostdevDef *hostdev, +qemuDomainPrepareHostdevPCI(const virDomainDef *def, + virDomainHostdevDef *hostdev, virQEMUCaps *qemuCaps) { virDeviceHostdevPCIDriverName *driverName = &hostdev->source.subsys.u.pci.driver.name; + virDomainHostdevSubsysPCI *pcisrc = &hostdev->source.subsys.u.pci; /* assign defaults for hostdev passthrough */ switch (*driverName) { @@ -10160,12 +10162,16 @@ qemuDomainPrepareHostdevPCI(virDomainHostdevDef *hostdev, return -1; } + if (pcisrc->driver.iommufd == VIR_TRISTATE_BOOL_ABSENT) + pcisrc->driver.iommufd = def->iommufd; + return 0; } int -qemuDomainPrepareHostdev(virDomainHostdevDef *hostdev, +qemuDomainPrepareHostdev(const virDomainDef *def, + virDomainHostdevDef *hostdev, qemuDomainObjPrivate *priv) { if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) @@ -10175,7 +10181,7 @@ qemuDomainPrepareHostdev(virDomainHostdevDef *hostdev, case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI: return qemuDomainPrepareHostdevSCSI(hostdev, priv); case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI: - return qemuDomainPrepareHostdevPCI(hostdev, priv->qemuCaps); + return qemuDomainPrepareHostdevPCI(def, hostdev, priv->qemuCaps); case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB: case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST: case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV: diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h index 62c5252b9f..8cd221062c 100644 --- a/src/qemu/qemu_domain.h +++ b/src/qemu/qemu_domain.h @@ -1048,7 +1048,8 @@ qemuDomainDiskCachemodeFlags(virDomainDiskCache cachemode, bool *noflush); int -qemuDomainPrepareHostdev(virDomainHostdevDef *hostdev, +qemuDomainPrepareHostdev(const virDomainDef *def, + virDomainHostdevDef *hostdev, qemuDomainObjPrivate *priv); char * qemuDomainGetManagedPRSocketPath(qemuDomainObjPrivate *priv); diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 994cc749f6..25fe699bb3 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -2900,7 +2900,7 @@ qemuDomainAttachHostDevice(virQEMUDriver *driver, return -1; } - if (qemuDomainPrepareHostdev(hostdev, vm->privateData) < 0) + if (qemuDomainPrepareHostdev(vm->def, hostdev, vm->privateData) < 0) return -1; switch (hostdev->source.subsys.type) { diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 6a9625e283..5fe4a33944 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -6050,7 +6050,7 @@ qemuProcessPrepareDomainNetwork(virDomainObj *vm) /* For hostdev present in qemuProcessPrepareDomain() phase this was * done already, but this code runs after that, so we have to call * it ourselves. */ - if (qemuDomainPrepareHostdev(hostdev, priv) < 0) + if (qemuDomainPrepareHostdev(def, hostdev, priv) < 0) return -1; virDomainHostdevInsert(def, hostdev); @@ -6838,7 +6838,7 @@ qemuProcessPrepareDomainHostdevs(virDomainObj *vm, for (i = 0; i < vm->def->nhostdevs; i++) { virDomainHostdevDef *hostdev = vm->def->hostdevs[i]; - if (qemuDomainPrepareHostdev(hostdev, priv) < 0) + if (qemuDomainPrepareHostdev(vm->def, hostdev, priv) < 0) return -1; } -- 2.53.0