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backends/iommufd: Introduce iommufd_backend_alloc_hw_queue

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Add a helper to allocate an iommufd backed HW queue for a vIOMMU.

While at it, define a struct IOMMUFDHWqueue for use by vendor
implementations.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Shameer Kolothum <skolothumtho@nvidia.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20260609112552.378999-4-skolothumtho@nvidia.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Nicolin Chen
2026-06-09 12:25:24 +01:00
committed by Peter Maydell
parent d2f3b3156d
commit 41dae463f4
3 changed files with 43 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
backends/iommufd.c
View File

@@ -549,6 +549,37 @@ bool iommufd_backend_alloc_veventq(IOMMUFDBackend *be, uint32_t viommu_id,
return true;
}
bool iommufd_backend_alloc_hw_queue(IOMMUFDBackend *be, uint32_t viommu_id,
uint32_t queue_type, uint32_t index,
uint64_t addr, uint64_t length,
uint32_t *out_hw_queue_id, Error **errp)
{
int ret;
struct iommu_hw_queue_alloc alloc_hw_queue = {
.size = sizeof(alloc_hw_queue),
.flags = 0,
.viommu_id = viommu_id,
.type = queue_type,
.index = index,
.nesting_parent_iova = addr,
.length = length,
};
ret = ioctl(be->fd, IOMMU_HW_QUEUE_ALLOC, &alloc_hw_queue);
trace_iommufd_backend_alloc_hw_queue(be->fd, viommu_id, queue_type,
index, addr, length,
alloc_hw_queue.out_hw_queue_id, ret);
if (ret) {
error_setg_errno(errp, errno, "IOMMU_HW_QUEUE_ALLOC failed");
return false;
}
g_assert(out_hw_queue_id);
*out_hw_queue_id = alloc_hw_queue.out_hw_queue_id;
return true;
}
bool host_iommu_device_iommufd_attach_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,
uint32_t hwpt_id, Error **errp)
{

1
backends/trace-events
View File

@@ -24,6 +24,7 @@ iommufd_backend_invalidate_cache(int iommufd, uint32_t id, uint32_t data_type, u
iommufd_backend_alloc_viommu(int iommufd, uint32_t dev_id, uint32_t type, uint32_t hwpt_id, uint64_t data_ptr, uint32_t data_len, uint32_t viommu_id, int ret) " iommufd=%d type=%u dev_id=%u hwpt_id=%u data_ptr=0x%"PRIx64" data_len=0x%x viommu_id=%u (%d)"
iommufd_backend_alloc_vdev(int iommufd, uint32_t dev_id, uint32_t viommu_id, uint64_t virt_id, uint32_t vdev_id, int ret) " iommufd=%d dev_id=%u viommu_id=%u virt_id=0x%"PRIx64" vdev_id=%u (%d)"
iommufd_viommu_alloc_eventq(int iommufd, uint32_t viommu_id, uint32_t type, uint32_t veventq_id, uint32_t veventq_fd, int ret) " iommufd=%d viommu_id=%u type=%u veventq_id=%u veventq_fd=%u (%d)"
iommufd_backend_alloc_hw_queue(int iommufd, uint32_t viommu_id, uint32_t queue_type, uint32_t index, uint64_t addr, uint64_t size, uint32_t queue_id, int ret) " iommufd=%d viommu_id=%u queue_type=%u index=%u addr=0x%"PRIx64" size=0x%"PRIx64" queue_id=%u (%d)"
# igvm-cfg.c
igvm_reset_enter(int type) "type=%u"