This is a note to let you know that I've just added the patch titled
iommu/amd: Set the pgsize_bitmap correctly
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iommu-amd-set-the-pgsize_bitmap-correctly.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4ec80bf6b5ba4a848cc4828bd6cf64e055c8506c
Author: Jason Gunthorpe <jgg@xxxxxxxx>
Date: Thu Aug 29 21:06:12 2024 -0300
iommu/amd: Set the pgsize_bitmap correctly
[ Upstream commit 7a41dcb52f9de6079621fc31c3b84c7fc290934b ]
When using io_pgtable the correct pgsize_bitmap is stored in the cfg, both
v1_alloc_pgtable() and v2_alloc_pgtable() set it correctly.
This fixes a bug where the v2 pgtable had the wrong pgsize as
protection_domain_init_v2() would set it and then do_iommu_domain_alloc()
immediately resets it.
Remove the confusing ops.pgsize_bitmap since that is not used if the
driver sets domain.pgsize_bitmap.
Fixes: 134288158a41 ("iommu/amd: Add domain_alloc_user based domain allocation")
Reviewed-by: Vasant Hegde <vasant.hegde@xxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Link: https://lore.kernel.org/r/3-v2-831cdc4d00f3+1a315-amd_iopgtbl_jgg@xxxxxxxxxx
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index edbd4ca1451a8..833637ffae39f 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2271,26 +2271,11 @@ void protection_domain_free(struct protection_domain *domain)
kfree(domain);
}
-static int protection_domain_init_v1(struct protection_domain *domain)
-{
- domain->pd_mode = PD_MODE_V1;
- return 0;
-}
-
-static int protection_domain_init_v2(struct protection_domain *pdom)
-{
- pdom->pd_mode = PD_MODE_V2;
- pdom->domain.pgsize_bitmap = AMD_IOMMU_PGSIZES_V2;
-
- return 0;
-}
-
struct protection_domain *protection_domain_alloc(unsigned int type)
{
struct io_pgtable_ops *pgtbl_ops;
struct protection_domain *domain;
int pgtable;
- int ret;
domain = kzalloc(sizeof(*domain), GFP_KERNEL);
if (!domain)
@@ -2326,18 +2311,14 @@ struct protection_domain *protection_domain_alloc(unsigned int type)
switch (pgtable) {
case AMD_IOMMU_V1:
- ret = protection_domain_init_v1(domain);
+ domain->pd_mode = PD_MODE_V1;
break;
case AMD_IOMMU_V2:
- ret = protection_domain_init_v2(domain);
+ domain->pd_mode = PD_MODE_V2;
break;
default:
- ret = -EINVAL;
- break;
- }
-
- if (ret)
goto out_err;
+ }
pgtbl_ops = alloc_io_pgtable_ops(pgtable, &domain->iop.pgtbl_cfg, domain);
if (!pgtbl_ops)
@@ -2390,10 +2371,10 @@ static struct iommu_domain *do_iommu_domain_alloc(unsigned int type,
domain->domain.geometry.aperture_start = 0;
domain->domain.geometry.aperture_end = dma_max_address();
domain->domain.geometry.force_aperture = true;
+ domain->domain.pgsize_bitmap = domain->iop.iop.cfg.pgsize_bitmap;
if (iommu) {
domain->domain.type = type;
- domain->domain.pgsize_bitmap = iommu->iommu.ops->pgsize_bitmap;
domain->domain.ops = iommu->iommu.ops->default_domain_ops;
if (dirty_tracking)
@@ -2852,7 +2833,6 @@ const struct iommu_ops amd_iommu_ops = {
.device_group = amd_iommu_device_group,
.get_resv_regions = amd_iommu_get_resv_regions,
.is_attach_deferred = amd_iommu_is_attach_deferred,
- .pgsize_bitmap = AMD_IOMMU_PGSIZES,
.def_domain_type = amd_iommu_def_domain_type,
.dev_enable_feat = amd_iommu_dev_enable_feature,
.dev_disable_feat = amd_iommu_dev_disable_feature,
