diff mbox series

[05/12] iommu/vt-d: Set No Execute Enable bit in PASID table entry

Message ID 20230131073740.378984-6-baolu.lu@linux.intel.com
State New
Headers
Series Intel IOMMU updates for Linux v6.3 |

Commit Message

Baolu Lu Jan. 31, 2023, 7:37 a.m. UTC 
  Setup No Execute Enable bit (Bit 133) of a scalable mode PASID entry.
This is to allow the use of XD bit of the first level page table.

Fixes: ddf09b6d43ec ("iommu/vt-d: Setup pasid entries for iova over first level")
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20230126095438.354205-1-baolu.lu@linux.intel.com
---
 drivers/iommu/intel/pasid.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
diff mbox series

Patch

diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index fb3c7020028d..ec964ac7d797 100644
--- a/drivers/iommu/intel/pasid.c
+++ b/drivers/iommu/intel/pasid.c
@@ -364,6 +364,16 @@  static inline void pasid_set_page_snoop(struct pasid_entry *pe, bool value)
 	pasid_set_bits(&pe->val[1], 1 << 23, value << 23);
 }
 
+/*
+ * Setup No Execute Enable bit (Bit 133) of a scalable mode PASID
+ * entry. It is required when XD bit of the first level page table
+ * entry is about to be set.
+ */
+static inline void pasid_set_nxe(struct pasid_entry *pe)
+{
+	pasid_set_bits(&pe->val[2], 1 << 5, 1 << 5);
+}
+
 /*
  * Setup the Page Snoop (PGSNP) field (Bit 88) of a scalable mode
  * PASID entry.
@@ -557,6 +567,7 @@  int intel_pasid_setup_first_level(struct intel_iommu *iommu,
 	pasid_set_domain_id(pte, did);
 	pasid_set_address_width(pte, iommu->agaw);
 	pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
+	pasid_set_nxe(pte);
 
 	/* Setup Present and PASID Granular Transfer Type: */
 	pasid_set_translation_type(pte, PASID_ENTRY_PGTT_FL_ONLY);