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[Qemu-devel] [PATCH 21/66] memory: add getter for owner
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 21/66] memory: add getter for owner |
Date: |
Thu, 4 Jul 2013 17:13:17 +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 3f48f07..2f3e8e4 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -382,6 +382,13 @@ 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 56ef4ba..f85774a 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();
@@ -1013,6 +1014,11 @@ 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 10/66] Privatize register_ioport_read/write, (continued)
- [Qemu-devel] [PATCH 10/66] Privatize register_ioport_read/write, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 11/66] isa: implement isa_is_ioport_assigned via memory_region_find, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 12/66] vmware-vga: Accept unaligned I/O accesses, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 13/66] xen: Mark fixed platform I/O as unaligned, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 14/66] ioport: Switch dispatching to memory core layer, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 16/66] vmport: Disentangle read handler type from portio, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 15/66] ioport: Remove unused old dispatching services, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 17/66] ioport: Move portio types to ioport.h, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 19/66] memory: destroy phys_sections one by one, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 20/66] exec: simplify destruction of the phys map, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 21/66] memory: add getter for owner,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 22/66] memory: add ref/unref, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 23/66] memory: introduce memory_region_present, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 24/66] memory: add ref/unref calls, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 25/66] exec: check MRU in qemu_ram_addr_from_host, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 26/66] exec: move qemu_ram_addr_from_host_nofail to cputlb.c, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 27/66] memory: return MemoryRegion from qemu_ram_addr_from_host, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 28/66] exec: reorganize address_space_map, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 29/66] memory: ref/unref memory across address_space_map/unmap, Paolo Bonzini, 2013/07/04
- [Qemu-devel] [PATCH 30/66] escc: rename struct to ESCCState, Paolo Bonzini, 2013/07/04