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[Qemu-devel] [PATCH v2 04/11] memory: add getter for owner
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH v2 04/11] memory: add getter for owner |
Date: |
Fri, 28 Jun 2013 18:58:15 +0200 |
Whenever memory regions are accessed outside the BQL, they need to be
preserved against hot-unplug. MemoryRegions actually do not have their
own reference count; they piggyback on a QOM object, their "owner".
The owner is set at creation time, and there is a function to retrieve
the owner.
Signed-off-by: Paolo Bonzini <address@hidden>
---
include/exec/memory.h | 7 +++++++
memory.c | 6 ++++++
2 files changed, 13 insertions(+)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index be3d39f..1ad9c19 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -380,6 +380,13 @@ void memory_region_init_iommu(MemoryRegion *mr,
void memory_region_destroy(MemoryRegion *mr);
/**
+ * memory_region_owner: get a memory region's owner.
+ *
+ * @mr: the memory region being queried.
+ */
+struct Object *memory_region_owner(MemoryRegion *mr);
+
+/**
* memory_region_size: get a memory region's size.
*
* @mr: the memory region being queried.
diff --git a/memory.c b/memory.c
index 6250bec1..4d396c3 100644
--- a/memory.c
+++ b/memory.c
@@ -738,6 +738,7 @@ void memory_region_init(MemoryRegion *mr,
mr->owner = owner;
mr->iommu_ops = NULL;
mr->parent = NULL;
+ mr->owner = NULL;
mr->size = int128_make64(size);
if (size == UINT64_MAX) {
mr->size = int128_2_64();
@@ -1011,6 +1012,11 @@ void memory_region_destroy(MemoryRegion *mr)
g_free(mr->ioeventfds);
}
+Object *memory_region_owner(MemoryRegion *mr)
+{
+ return mr->owner;
+}
+
uint64_t memory_region_size(MemoryRegion *mr)
{
if (int128_eq(mr->size, int128_2_64())) {
--
1.8.1.4
- [Qemu-devel] [PATCH v2 00/11] Memory patches, part 4: region ownership, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 02/11] memory: destroy phys_sections one by one, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 03/11] exec: simplify destruction of the phys map, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 04/11] memory: add getter for owner,
Paolo Bonzini <=
- [Qemu-devel] [PATCH v2 07/11] exec: check MRU in qemu_ram_addr_from_host, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 05/11] memory: add ref/unref, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 06/11] memory: add ref/unref calls, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 08/11] exec: move qemu_ram_addr_from_host_nofail to cputlb.c, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 09/11] memory: return MemoryRegion from qemu_ram_addr_from_host, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 10/11] exec: reorganize address_space_map, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 11/11] memory: ref/unref memory across address_space_map/unmap, Paolo Bonzini, 2013/06/28
- [Qemu-devel] [PATCH v2 01/11] memory: add owner argument to initialization functions, Paolo Bonzini, 2013/06/28