[PATCH AUTOSEL 6.10 107/197] iommu/vt-d: Always reserve a domain ID for identity setup
From: Sasha Levin
Date: Wed Sep 25 2024 - 09:10:23 EST
From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
[ Upstream commit 2c13012e09190174614fd6901857a1b8c199e17d ]
We will use a global static identity domain. Reserve a static domain ID
for it.
Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Reviewed-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240809055431.36513-4-baolu.lu@xxxxxxxxxxxxxxx
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/iommu/intel/iommu.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index e9bea0305c268..eed67326976d3 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1462,10 +1462,10 @@ static int iommu_init_domains(struct intel_iommu *iommu)
* entry for first-level or pass-through translation modes should
* be programmed with a domain id different from those used for
* second-level or nested translation. We reserve a domain id for
- * this purpose.
+ * this purpose. This domain id is also used for identity domain
+ * in legacy mode.
*/
- if (sm_supported(iommu))
- set_bit(FLPT_DEFAULT_DID, iommu->domain_ids);
+ set_bit(FLPT_DEFAULT_DID, iommu->domain_ids);
return 0;
}
--
2.43.0