starred/qemu-qemu-1
1
0
Fork 0
mirror of https://github.com/qemu/qemu.git synced 2026-07-08 17:56:38 +00:00
Code Issues Packages Projects Releases Wiki Activity

backends/iommufd: Introduce iommufd_backend_alloc_viommu

Browse Source 
Add a helper to allocate a viommu object.

Also introduce a struct IOMMUFDViommu that can be used later by vendor
IOMMU implementations.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Shameer Kolothum <skolothumtho@nvidia.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Message-id: 20260126104342.253965-2-skolothumtho@nvidia.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Nicolin Chen
2026-01-29 13:32:04 +00:00
committed by Peter Maydell
parent 65fb9de488
commit f2d31df0d9
3 changed files with 41 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
backends/iommufd.c
View File

@@ -447,6 +447,32 @@ bool iommufd_backend_invalidate_cache(IOMMUFDBackend *be, uint32_t id,
return !ret;
}
bool iommufd_backend_alloc_viommu(IOMMUFDBackend *be, uint32_t dev_id,
uint32_t viommu_type, uint32_t hwpt_id,
uint32_t *out_viommu_id, Error **errp)
{
int ret;
struct iommu_viommu_alloc alloc_viommu = {
.size = sizeof(alloc_viommu),
.type = viommu_type,
.dev_id = dev_id,
.hwpt_id = hwpt_id,
};
ret = ioctl(be->fd, IOMMU_VIOMMU_ALLOC, &alloc_viommu);
trace_iommufd_backend_alloc_viommu(be->fd, dev_id, viommu_type, hwpt_id,
alloc_viommu.out_viommu_id, ret);
if (ret) {
error_setg_errno(errp, errno, "IOMMU_VIOMMU_ALLOC failed");
return false;
}
g_assert(out_viommu_id);
*out_viommu_id = alloc_viommu.out_viommu_id;
return true;
}
bool host_iommu_device_iommufd_attach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
uint32_t hwpt_id, Error **errp)
{

1
backends/trace-events
View File

@@ -21,3 +21,4 @@ iommufd_backend_free_id(int iommufd, uint32_t id, int ret) " iommufd=%d id=%d (%
iommufd_backend_set_dirty(int iommufd, uint32_t hwpt_id, bool start, int ret) " iommufd=%d hwpt=%u enable=%d (%d)"
iommufd_backend_get_dirty_bitmap(int iommufd, uint32_t hwpt_id, uint64_t iova, uint64_t size, uint64_t flags, uint64_t page_size, int ret) " iommufd=%d hwpt=%u iova=0x%"PRIx64" size=0x%"PRIx64" flags=0x%"PRIx64" page_size=0x%"PRIx64" (%d)"
iommufd_backend_invalidate_cache(int iommufd, uint32_t id, uint32_t data_type, uint32_t entry_len, uint32_t entry_num, uint32_t done_num, uint64_t data_ptr, int ret) " iommufd=%d id=%u data_type=%u entry_len=%u entry_num=%u done_num=%u data_ptr=0x%"PRIx64" (%d)"
iommufd_backend_alloc_viommu(int iommufd, uint32_t dev_id, uint32_t type, uint32_t hwpt_id, uint32_t viommu_id, int ret) " iommufd=%d type=%u dev_id=%u hwpt_id=%u viommu_id=%u (%d)"

14
include/system/iommufd.h
View File

@@ -38,6 +38,16 @@ struct IOMMUFDBackend {
/*< public >*/
};
/*
* Virtual IOMMU object that represents physical IOMMU's virtualization
* support
*/
typedef struct IOMMUFDViommu {
IOMMUFDBackend *iommufd;
uint32_t s2_hwpt_id; /* ID of stage 2 HWPT */
uint32_t viommu_id; /* virtual IOMMU ID of allocated object */
} IOMMUFDViommu;
bool iommufd_backend_connect(IOMMUFDBackend *be, Error **errp);
void iommufd_backend_disconnect(IOMMUFDBackend *be);
@@ -59,6 +69,10 @@ bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint32_t dev_id,
uint32_t data_type, uint32_t data_len,
void *data_ptr, uint32_t *out_hwpt,
Error **errp);
bool iommufd_backend_alloc_viommu(IOMMUFDBackend *be, uint32_t dev_id,
uint32_t viommu_type, uint32_t hwpt_id,
uint32_t *out_hwpt, Error **errp);
bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be, uint32_t hwpt_id,
bool start, Error **errp);
bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be, uint32_t hwpt_id,