diff mbox series

[v3,02/19] intel_iommu: Declare supported PASID size

Message ID 20250221080331.186285-3-clement.mathieu--drif@eviden.com (mailing list archive)
State New
Headers show
Series intel_iommu: Add ATS support | expand

Commit Message

CLEMENT MATHIEU--DRIF Feb. 21, 2025, 8:07 a.m. UTC 
From: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com>

PSS field of the ecap register stores the supported PASID size minus 1.
Thus, this commit adds support for 20bits PASIDs.

Signed-off-by: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com>
---
 hw/i386/intel_iommu.c          | 2 +-
 hw/i386/intel_iommu_internal.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 7fde0603bf..1b4aaffedc 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -4574,7 +4574,7 @@  static void vtd_cap_init(IntelIOMMUState *s)
     }
 
     if (s->pasid) {
-        s->ecap |= VTD_ECAP_PASID;
+        s->ecap |= VTD_ECAP_PASID | VTD_ECAP_PSS;
     }
 }
 
diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index e8b211e8b0..238f1f443f 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -192,6 +192,7 @@ 
 #define VTD_ECAP_SC                 (1ULL << 7)
 #define VTD_ECAP_MHMV               (15ULL << 20)
 #define VTD_ECAP_SRS                (1ULL << 31)
+#define VTD_ECAP_PSS                (19ULL << 35)
 #define VTD_ECAP_PASID              (1ULL << 40)
 #define VTD_ECAP_SMTS               (1ULL << 43)
 #define VTD_ECAP_SLTS               (1ULL << 46)