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backends/iommufd: Extend iommufd_backend_get_device_info() to fetch HW capabilities

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The helper will be able to fetch vendor agnostic IOMMU capabilities
supported both by hardware and software. Right now it is only iommu dirty
tracking.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
This commit is contained in:
Joao Martins 2024-07-19 13:04:51 +01:00 committed by Cédric Le Goater
parent 9f17604195
commit 2d1bf25897
3 changed files with 7 additions and 3 deletions
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4
backends/iommufd.c
View File

@ -209,7 +209,7 @@ int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
uint32_t *type, void *data, uint32_t len,
Error **errp)
uint64_t *caps, Error **errp)
{
struct iommu_hw_info info = {
.size = sizeof(info),
@ -225,6 +225,8 @@ bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
g_assert(type);
*type = info.out_data_type;
g_assert(caps);
*caps = info.out_capabilities;
return true;
}

4
hw/vfio/iommufd.c
View File

@ -628,11 +628,13 @@ static bool hiod_iommufd_vfio_realize(HostIOMMUDevice *hiod, void *opaque,
union {
struct iommu_hw_info_vtd vtd;
} data;
uint64_t hw_caps;
hiod->agent = opaque;
if (!iommufd_backend_get_device_info(vdev->iommufd, vdev->devid,
&type, &data, sizeof(data), errp)) {
&type, &data, sizeof(data),
&hw_caps, errp)) {
return false;
}

2
include/sysemu/iommufd.h
View File

@ -49,7 +49,7 @@ int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
hwaddr iova, ram_addr_t size);
bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
uint32_t *type, void *data, uint32_t len,
Error **errp);
uint64_t *caps, Error **errp);
#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd"
#endif