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Message-ID: <20240925121137.1307574-81-sashal@kernel.org>
Date: Wed, 25 Sep 2024 08:08:21 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Lu Baolu <baolu.lu@...ux.intel.com>,
Jason Gunthorpe <jgg@...dia.com>,
Kevin Tian <kevin.tian@...el.com>,
Jerry Snitselaar <jsnitsel@...hat.com>,
Joerg Roedel <jroedel@...e.de>,
Sasha Levin <sashal@...nel.org>,
dwmw2@...radead.org,
joro@...tes.org,
will@...nel.org,
iommu@...ts.linux.dev
Subject: [PATCH AUTOSEL 6.6 081/139] iommu/vt-d: Always reserve a domain ID for identity setup
From: Lu Baolu <baolu.lu@...ux.intel.com>
[ 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@...ux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
Reviewed-by: Kevin Tian <kevin.tian@...el.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>
Link: https://lore.kernel.org/r/20240809055431.36513-4-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 9918af222c516..b7317016834cf 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1692,10 +1692,10 @@ 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
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