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From: CLEMENT MATHIEU--DRIF <clement.mathieu--drif@eviden.com>
To: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
CC: "jasowang@redhat.com" <jasowang@redhat.com>, "zhenzhong.duan@intel.com"
<zhenzhong.duan@intel.com>, "kevin.tian@intel.com" <kevin.tian@intel.com>,
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CLEMENT MATHIEU--DRIF <clement.mathieu--drif@eviden.com>
Subject: [PATCH v4 01/19] memory: Add permissions in IOMMUAccessFlags
Thread-Topic: [PATCH v4 01/19] memory: Add permissions in IOMMUAccessFlags
Thread-Index: AQHbiQX+k4wfw2jwrUuxWYSRoffAiA==
Date: Thu, 27 Feb 2025 10:54:38 +0000
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From: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com>
This will be necessary for devices implementing ATS.
We also define a new macro IOMMU_ACCESS_FLAG_FULL in addition to
IOMMU_ACCESS_FLAG to support more access flags.
IOMMU_ACCESS_FLAG is kept for convenience and backward compatibility.
Here are the flags added (defined by the PCIe 5 specification) :
- Execute Requested
- Privileged Mode Requested
- Global
- Untranslated Only
IOMMU_ACCESS_FLAG sets the additional flags to 0
Signed-off-by: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com>
---
include/exec/memory.h | 23 +++++++++++++++++++++--
1 file changed, 21 insertions(+), 2 deletions(-)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 78c4e0aec8..29f5d31eef 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -110,15 +110,34 @@ struct MemoryRegionSection {
=20
typedef struct IOMMUTLBEntry IOMMUTLBEntry;
=20
-/* See address_space_translate: bit 0 is read, bit 1 is write. */
+/*
+ * See address_space_translate:
+ * - bit 0 : read
+ * - bit 1 : write
+ * - bit 2 : exec
+ * - bit 3 : priv
+ * - bit 4 : global
+ * - bit 5 : untranslated only
+ */
typedef enum {
IOMMU_NONE =3D 0,
IOMMU_RO =3D 1,
IOMMU_WO =3D 2,
IOMMU_RW =3D 3,
+ IOMMU_EXEC =3D 4,
+ IOMMU_PRIV =3D 8,
+ IOMMU_GLOBAL =3D 16,
+ IOMMU_UNTRANSLATED_ONLY =3D 32,
} IOMMUAccessFlags;
=20
-#define IOMMU_ACCESS_FLAG(r, w) (((r) ? IOMMU_RO : 0) | ((w) ? IOMMU_WO : =
0))
+#define IOMMU_ACCESS_FLAG(r, w) (((r) ? IOMMU_RO : 0) | \
+ ((w) ? IOMMU_WO : 0))
+#define IOMMU_ACCESS_FLAG_FULL(r, w, x, p, g, uo) \
+ (IOMMU_ACCESS_FLAG(r, w) | \
+ ((x) ? IOMMU_EXEC : 0) | \
+ ((p) ? IOMMU_PRIV : 0) | \
+ ((g) ? IOMMU_GLOBAL : 0) | \
+ ((uo) ? IOMMU_UNTRANSLATED_ONLY : 0))
=20
struct IOMMUTLBEntry {
AddressSpace *target_as;
--=20
2.48.1