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[Qemu-devel] [PATCH v3 11/34] memory: add memory_region_is_mapped() API
From: |
Igor Mammedov |
Subject: |
[Qemu-devel] [PATCH v3 11/34] memory: add memory_region_is_mapped() API |
Date: |
Tue, 27 May 2014 15:01:08 +0200 |
which allows to check if MemoryRegion is already mapped.
Signed-off-by: Igor Mammedov <address@hidden>
---
include/exec/memory.h | 8 ++++++++
memory.c | 15 ++++++++++++++-
2 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 1d55ad9..ab11c32 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -848,6 +848,14 @@ void memory_region_set_alias_offset(MemoryRegion *mr,
bool memory_region_present(MemoryRegion *parent, hwaddr addr);
/**
+ * memory_region_is_mapped: returns true if #MemoryRegion is mapped
+ * into any address space.
+ *
+ * @mr: a #MemoryRegion which should be checked if it's mapped
+ */
+bool memory_region_is_mapped(MemoryRegion *mr);
+
+/**
* memory_region_find: translate an address/size relative to a
* MemoryRegion into a #MemoryRegionSection.
*
diff --git a/memory.c b/memory.c
index 3f1df23..f4d8e69 100644
--- a/memory.c
+++ b/memory.c
@@ -492,7 +492,7 @@ static AddressSpace
*memory_region_to_address_space(MemoryRegion *mr)
return as;
}
}
- abort();
+ return NULL;
}
/* Render a memory region into the global view. Ranges in @view obscure
@@ -1569,6 +1569,16 @@ bool memory_region_present(MemoryRegion *parent, hwaddr
addr)
return true;
}
+bool memory_region_is_mapped(MemoryRegion *mr)
+{
+ mr = memory_region_find(mr, 0, 1).mr;
+ if (!mr) {
+ return false;
+ }
+ memory_region_unref(mr);
+ return true;
+}
+
MemoryRegionSection memory_region_find(MemoryRegion *mr,
hwaddr addr, uint64_t size)
{
@@ -1586,6 +1596,9 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr,
}
as = memory_region_to_address_space(root);
+ if (!as) {
+ return ret;
+ }
range = addrrange_make(int128_make64(addr), int128_make64(size));
view = address_space_get_flatview(as);
--
1.7.1
- [Qemu-devel] [PATCH v3 07/34] pc: create custom generic PC machine type, (continued)
[Qemu-devel] [PATCH v3 11/34] memory: add memory_region_is_mapped() API,
Igor Mammedov <=
[Qemu-devel] [PATCH v3 13/34] pc: initialize memory hotplug address space, Igor Mammedov, 2014/05/27
[Qemu-devel] [PATCH v3 14/34] pc: exit QEMU if number of slots more than supported 256, Igor Mammedov, 2014/05/27
[Qemu-devel] [PATCH v3 17/34] pc: add memory hotplug handler to PC_MACHINE, Igor Mammedov, 2014/05/27
[Qemu-devel] [PATCH v3 18/34] dimm: add busy address check and address auto-allocation, Igor Mammedov, 2014/05/27
[Qemu-devel] [PATCH v3 22/34] trace: add acpi memory hotplug IO region events, Igor Mammedov, 2014/05/27