linux-kernel - [PATCH 09/10] iommu/vt-d: Set SSADE when attaching to a parent with dirty tracking

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Message-Id: <20240219111601.96405-10-baolu.lu@linux.intel.com>
Date: Mon, 19 Feb 2024 19:16:00 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Joerg Roedel <joro@...tes.org>
Cc: Yi Liu <yi.l.liu@...el.com>,
	Arnd Bergmann <arnd@...db.de>,
	Kevin Tian <kevin.tian@...el.com>,
	Joao Martins <joao.m.martins@...cle.com>,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 09/10] iommu/vt-d: Set SSADE when attaching to a parent with dirty tracking

From: Yi Liu <yi.l.liu@...el.com>

Should set the SSADE (Second Stage Access/Dirty bit Enable) bit of the
pasid entry when attaching a device to a nested domain if its parent
has already enabled dirty tracking.

Fixes: 111bf85c68f6 ("iommu/vt-d: Add helper to setup pasid nested translation")
Signed-off-by: Yi Liu <yi.l.liu@...el.com>
Reviewed-by: Joao Martins <joao.m.martins@...cle.com>
Link: https://lore.kernel.org/r/20240208091414.28133-1-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
---
 drivers/iommu/intel/pasid.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index a32d7e509842..108158e2b907 100644
--- a/drivers/iommu/intel/pasid.c
+++ b/drivers/iommu/intel/pasid.c
@@ -657,6 +657,8 @@ int intel_pasid_setup_nested(struct intel_iommu *iommu, struct device *dev,
 	pasid_set_domain_id(pte, did);
 	pasid_set_address_width(pte, s2_domain->agaw);
 	pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
+	if (s2_domain->dirty_tracking)
+		pasid_set_ssade(pte);
 	pasid_set_translation_type(pte, PASID_ENTRY_PGTT_NESTED);
 	pasid_set_present(pte);
 	spin_unlock(&iommu->lock);
-- 
2.34.1