Proxmox-Port/linux-loongson
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson synced 2025-08-29 19:49:10 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

iommu/amd: Enhance amd_iommu_domain_alloc_user()

Browse Source 
Previous patch enhanced core layer to check device PASID capability and
pass right flags to ops->domain_alloc_user().

Enhance amd_iommu_domain_alloc_user() to allocate domain with
appropriate page table based on flags parameter.
  - If flags is empty then allocate domain with default page table type.
    This will eventually replace ops->domain_alloc().
    For UNMANAGED domain, core will call this interface with flags=0. So
    AMD driver will continue to allocate V1 page table.

  - If IOMMU_HWPT_ALLOC_PASID flags is passed then allocate domain with v2
    page table.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20241028093810.5901-10-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2024-10-28 09:38:07 +00:00 committed by Joerg Roedel
parent a005ef62f9
commit ce2cd17546
1 changed files with 27 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/iommu/amd/iommu.c
View File

@ -2346,9 +2346,6 @@ static struct iommu_domain *do_iommu_domain_alloc(unsigned int type,
if (amd_iommu_snp_en && (type == IOMMU_DOMAIN_IDENTITY))
return ERR_PTR(-EINVAL);
if (dirty_tracking && !amd_iommu_hd_support(iommu))
return ERR_PTR(-EOPNOTSUPP);
domain = protection_domain_alloc(type,
dev ? dev_to_node(dev) : NUMA_NO_NODE);
if (!domain)
@ -2403,11 +2400,36 @@ amd_iommu_domain_alloc_user(struct device *dev, u32 flags,
{
unsigned int type = IOMMU_DOMAIN_UNMANAGED;
struct amd_iommu *iommu = NULL;
const u32 supported_flags = IOMMU_HWPT_ALLOC_DIRTY_TRACKING |
IOMMU_HWPT_ALLOC_PASID;
if ((flags & ~IOMMU_HWPT_ALLOC_DIRTY_TRACKING) || parent || user_data)
if (dev)
iommu = get_amd_iommu_from_dev(dev);
if ((flags & ~supported_flags) || parent || user_data)
return ERR_PTR(-EOPNOTSUPP);
return do_iommu_domain_alloc(type, dev, flags, AMD_IOMMU_V1);
/* Allocate domain with v2 page table if IOMMU supports PASID. */
if (flags & IOMMU_HWPT_ALLOC_PASID) {
if (!amd_iommu_pasid_supported())
return ERR_PTR(-EOPNOTSUPP);
return do_iommu_domain_alloc(type, dev, flags, AMD_IOMMU_V2);
}
/* Allocate domain with v1 page table for dirty tracking */
if (flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING) {
if (iommu && amd_iommu_hd_support(iommu)) {
return do_iommu_domain_alloc(type, dev,
flags, AMD_IOMMU_V1);
}
return ERR_PTR(-EOPNOTSUPP);
}
/* If nothing specific is required use the kernel commandline default */
return do_iommu_domain_alloc(type, dev, 0, amd_iommu_pgtable);
}
void amd_iommu_domain_free(struct iommu_domain *dom)