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iommu/amd: Do not allocate io_pgtable_ops for passthrough domain

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In passthrough mode we do not use IOMMU page table. Hence we don't need
to allocate io_pgtable_ops.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20230105091728.42469-1-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde
2023-01-05 09:17:28 +00:00
committed by Joerg Roedel
parent b7bfaa761d
commit ba9bee7f59
1 changed files with 4 additions and 0 deletions
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4
drivers/iommu/amd/iommu.c
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@@ -2072,6 +2072,10 @@ static struct protection_domain *protection_domain_alloc(unsigned int type)
if (ret)
goto out_err;
/* No need to allocate io pgtable ops in passthrough mode */
if (type == IOMMU_DOMAIN_IDENTITY)
return domain;
pgtbl_ops = alloc_io_pgtable_ops(pgtable, &domain->iop.pgtbl_cfg, domain);
if (!pgtbl_ops) {
domain_id_free(domain->id);