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[Qemu-devel] [PATCH v5 13/18] memory: introduce memory_region_notify_one
From: |
Peter Xu |
Subject: |
[Qemu-devel] [PATCH v5 13/18] memory: introduce memory_region_notify_one() |
Date: |
Tue, 24 Jan 2017 18:26:06 +0800 |
Generalizing the notify logic in memory_region_notify_iommu() into a
single function. This can be further used in customized replay()
functions for IOMMUs.
Signed-off-by: Peter Xu <address@hidden>
---
include/exec/memory.h | 15 +++++++++++++++
memory.c | 40 ++++++++++++++++++++++++----------------
2 files changed, 39 insertions(+), 16 deletions(-)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 885c05f..75371e9 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -686,6 +686,21 @@ void memory_region_notify_iommu(MemoryRegion *mr,
IOMMUTLBEntry entry);
/**
+ * memory_region_notify_one: notify a change in an IOMMU translation
+ * entry to a single notifier
+ *
+ * This works just like memory_region_notify_iommu(), but it only
+ * notifies a specific notifier, not all of them.
+ *
+ * @notifier: the notifier to be notified
+ * @entry: the new entry in the IOMMU translation table. The entry
+ * replaces all old entries for the same virtual I/O address range.
+ * Deleted entries have address@hidden == 0.
+ */
+void memory_region_notify_one(IOMMUNotifier *notifier,
+ IOMMUTLBEntry *entry);
+
+/**
* memory_region_register_iommu_notifier: register a notifier for changes to
* IOMMU translation entries.
*
diff --git a/memory.c b/memory.c
index 85cdcd1..d0a5f01 100644
--- a/memory.c
+++ b/memory.c
@@ -1666,32 +1666,40 @@ void
memory_region_unregister_iommu_notifier(MemoryRegion *mr,
memory_region_update_iommu_notify_flags(mr);
}
-void memory_region_notify_iommu(MemoryRegion *mr,
- IOMMUTLBEntry entry)
+void memory_region_notify_one(IOMMUNotifier *notifier,
+ IOMMUTLBEntry *entry)
{
- IOMMUNotifier *iommu_notifier;
IOMMUNotifierFlag request_flags;
- assert(memory_region_is_iommu(mr));
+ /*
+ * Skip the notification if the notification does not overlap
+ * with registered range.
+ */
+ if (notifier->start > entry->iova + entry->addr_mask + 1 ||
+ notifier->end < entry->iova) {
+ return;
+ }
- if (entry.perm & IOMMU_RW) {
+ if (entry->perm & IOMMU_RW) {
request_flags = IOMMU_NOTIFIER_MAP;
} else {
request_flags = IOMMU_NOTIFIER_UNMAP;
}
+ if (notifier->notifier_flags & request_flags) {
+ notifier->notify(notifier, entry);
+ }
+}
+
+void memory_region_notify_iommu(MemoryRegion *mr,
+ IOMMUTLBEntry entry)
+{
+ IOMMUNotifier *iommu_notifier;
+
+ assert(memory_region_is_iommu(mr));
+
IOMMU_NOTIFIER_FOREACH(iommu_notifier, mr) {
- /*
- * Skip the notification if the notification does not overlap
- * with registered range.
- */
- if (iommu_notifier->start > entry.iova + entry.addr_mask + 1 ||
- iommu_notifier->end < entry.iova) {
- continue;
- }
- if (iommu_notifier->notifier_flags & request_flags) {
- iommu_notifier->notify(iommu_notifier, &entry);
- }
+ memory_region_notify_one(iommu_notifier, &entry);
}
}
--
2.7.4
- Re: [Qemu-devel] [PATCH v5 03/18] vfio: allow to notify unmap for very large region, (continued)
- [Qemu-devel] [PATCH v5 04/18] intel_iommu: add "caching-mode" option, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 05/18] intel_iommu: simplify irq region translation, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 06/18] intel_iommu: renaming gpa to iova where proper, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 07/18] intel_iommu: fix trace for inv desc handling, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 09/18] intel_iommu: vtd_slpt_level_shift check level, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 08/18] intel_iommu: fix trace for addr translation, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 10/18] memory: add section range info for IOMMU notifier, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 11/18] memory: provide IOMMU_NOTIFIER_FOREACH macro, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 12/18] memory: provide iommu_replay_all(), Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 13/18] memory: introduce memory_region_notify_one(),
Peter Xu <=
- [Qemu-devel] [PATCH v5 14/18] memory: add MemoryRegionIOMMUOps.replay() callback, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 15/18] intel_iommu: provide its own replay() callback, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 16/18] intel_iommu: do replay when context invalidate, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 17/18] intel_iommu: allow dynamic switch of IOMMU region, Peter Xu, 2017/01/24
- [Qemu-devel] [PATCH v5 18/18] intel_iommu: enable vfio devices, Peter Xu, 2017/01/24
- Re: [Qemu-devel] [PATCH v5 00/18] VT-d: vfio enablement and misc enhances, Peter Xu, 2017/01/24