From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
qemu-devel@nongnu.org, qemu-arm@nongnu.org,
peter.maydell@linaro.org, peterx@redhat.com, pbonzini@redhat.com,
alex.williamson@redhat.com
Subject: [Qemu-devel] [PATCH v2 2/6] memory: Add IOMMU_ATTR_VFIO_NESTED IOMMU memory region attribute
Date: Mon, 1 Jul 2019 11:30:30 +0200 [thread overview]
Message-ID: <20190701093034.18873-3-eric.auger@redhat.com> (raw)
In-Reply-To: <20190701093034.18873-1-eric.auger@redhat.com>
We introduce a new IOMMU Memory Region attribute,
IOMMU_ATTR_VFIO_NESTED that tells whether the virtual IOMMU
requires physical nested stages for VFIO integration.
Current Intel virtual IOMMU device supports "Caching
Mode" and does not require 2 stages at physical level to be
integrated with VFIO. However SMMUv3 does not implement such
"caching mode" and requires to use physical stage 1 for VFIO
integration.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
include/exec/memory.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index bdd76653a8..dd7ef23f96 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -204,7 +204,8 @@ struct MemoryRegionOps {
};
enum IOMMUMemoryRegionAttr {
- IOMMU_ATTR_SPAPR_TCE_FD
+ IOMMU_ATTR_SPAPR_TCE_FD,
+ IOMMU_ATTR_VFIO_NESTED,
};
/**
--
2.20.1
next prev parent reply other threads:[~2019-07-01 9:36 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-01 9:30 [Qemu-devel] [PATCH v2 0/6] ARM SMMUv3: Fix spurious notification errors and stall with vfio-pci Eric Auger
2019-07-01 9:30 ` [Qemu-devel] [PATCH v2 1/6] memory: Remove unused memory_region_iommu_replay_all() Eric Auger
2019-07-01 9:58 ` Philippe Mathieu-Daudé
2019-07-03 5:41 ` Peter Xu
2019-07-01 9:30 ` Eric Auger [this message]
2019-07-03 5:42 ` [Qemu-devel] [PATCH v2 2/6] memory: Add IOMMU_ATTR_VFIO_NESTED IOMMU memory region attribute Peter Xu
2019-07-03 9:10 ` Auger Eric
2019-07-01 9:30 ` [Qemu-devel] [PATCH v2 3/6] hw/vfio/common: Do not replay IOMMU mappings in nested case Eric Auger
2019-07-03 5:41 ` Peter Xu
2019-07-03 9:04 ` Auger Eric
2019-07-03 10:21 ` Peter Xu
2019-07-03 10:45 ` Auger Eric
2019-07-04 2:36 ` Peter Xu
2019-07-01 9:30 ` [Qemu-devel] [PATCH v2 4/6] hw/arm/smmuv3: Advertise VFIO_NESTED Eric Auger
2019-07-01 9:30 ` [Qemu-devel] [PATCH v2 5/6] hw/arm/smmuv3: Log a guest error when decoding an invalid STE Eric Auger
2019-07-01 9:58 ` Philippe Mathieu-Daudé
2019-07-01 9:30 ` [Qemu-devel] [PATCH v2 6/6] hw/arm/smmuv3: Remove spurious error messages on IOVA invalidations Eric Auger
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