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[Qemu-devel] [PATCH v6 16/18] intel_iommu: do replay when context invali
From: |
Peter Xu |
Subject: |
[Qemu-devel] [PATCH v6 16/18] intel_iommu: do replay when context invalidate |
Date: |
Fri, 3 Feb 2017 16:22:42 +0800 |
Before this one we only invalidate context cache when we receive context
entry invalidations. However it's possible that the invalidation also
contains a domain switch (only if cache-mode is enabled for vIOMMU). In
that case we need to notify all the registered components about the new
mapping.
Signed-off-by: Peter Xu <address@hidden>
---
hw/i386/intel_iommu.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 0a42c01..363227d 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1115,6 +1115,16 @@ static void
vtd_context_device_invalidate(IntelIOMMUState *s,
trace_vtd_inv_desc_cc_device(bus_n, VTD_PCI_SLOT(devfn_it),
VTD_PCI_FUNC(devfn_it));
vtd_as->context_cache_entry.context_cache_gen = 0;
+ /*
+ * So a device is moving out of (or moving into) a
+ * domain, a replay() suites here to notify all the
+ * IOMMU_NOTIFIER_MAP registers about this change.
+ * This won't bring bad even if we have no such
+ * notifier registered - the IOMMU notification
+ * framework will skip MAP notifications if that
+ * happened.
+ */
+ memory_region_iommu_replay_all(&vtd_as->iommu);
}
}
}
--
2.7.4
- Re: [Qemu-devel] [PATCH v6 09/18] intel_iommu: vtd_slpt_level_shift check level, (continued)
- [Qemu-devel] [PATCH v6 10/18] memory: add section range info for IOMMU notifier, Peter Xu, 2017/02/03
- [Qemu-devel] [PATCH v6 11/18] memory: provide IOMMU_NOTIFIER_FOREACH macro, Peter Xu, 2017/02/03
- [Qemu-devel] [PATCH v6 12/18] memory: provide iommu_replay_all(), Peter Xu, 2017/02/03
- [Qemu-devel] [PATCH v6 13/18] memory: introduce memory_region_notify_one(), Peter Xu, 2017/02/03
- [Qemu-devel] [PATCH v6 14/18] memory: add MemoryRegionIOMMUOps.replay() callback, Peter Xu, 2017/02/03
- [Qemu-devel] [PATCH v6 15/18] intel_iommu: provide its own replay() callback, Peter Xu, 2017/02/03
- [Qemu-devel] [PATCH v6 16/18] intel_iommu: do replay when context invalidate,
Peter Xu <=
- [Qemu-devel] [PATCH v6 17/18] intel_iommu: allow dynamic switch of IOMMU region, Peter Xu, 2017/02/03
- [Qemu-devel] [PATCH v6 18/18] intel_iommu: enable vfio devices, Peter Xu, 2017/02/03