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https://github.com/xemu-project/xemu.git
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56c4bfb3f0
RAMBlock.offset --> GuestPhysBlock.target_start
RAMBlock.offset + RAMBlock.length --> GuestPhysBlock.target_end
RAMBlock.length --> GuestPhysBlock.target_end -
GuestPhysBlock.target_start
"GuestPhysBlock.host_addr" is only used when writing the dump contents.
This patch enables "crash" to work with the vmcore by rebasing the vmcore
from the left side of the following diagram to the right side:
host-private
offset
relative
to ram_addr RAMBlock guest-visible paddrs
0 +-------------------+.....+-------------------+ 0
| ^ | | ^ |
| 640 KB | | 640 KB |
| v | | v |
0x0000a0000 +-------------------+.....+-------------------+ 0x0000a0000
| ^ | |XXXXXXXXXXXXXXXXXXX|
| 384 KB | |XXXXXXXXXXXXXXXXXXX|
| v | |XXXXXXXXXXXXXXXXXXX|
0x000100000 +-------------------+.....+-------------------+ 0x000100000
| ^ | | ^ |
| 3583 MB | | 3583 MB |
| v | | v |
0x0e0000000 +-------------------+.....+-------------------+ 0x0e0000000
| ^ |. |XXXXXXXXXXXXXXXXXXX|
| above_4g_mem_size | . |XXXX PCI hole XXXXX|
| v | . |XXXX XXXXX|
ram_size +-------------------+ . |XXXX 512 MB XXXXX|
. .|XXXXXXXXXXXXXXXXXXX|
. +-------------------+ 0x100000000
. | ^ |
. | above_4g_mem_size |
.| v |
+-------------------+ ram_size
+ 512 MB
Related RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=981582
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/*
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* QEMU memory mapping
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*
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* Copyright Fujitsu, Corp. 2011, 2012
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*
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* Authors:
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* Wen Congyang <wency@cn.fujitsu.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef MEMORY_MAPPING_H
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#define MEMORY_MAPPING_H
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#include "qemu/queue.h"
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#include "qemu/typedefs.h"
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typedef struct GuestPhysBlock {
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/* visible to guest, reflects PCI hole, etc */
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hwaddr target_start;
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/* implies size */
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hwaddr target_end;
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/* points into host memory */
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uint8_t *host_addr;
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QTAILQ_ENTRY(GuestPhysBlock) next;
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} GuestPhysBlock;
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/* point-in-time snapshot of guest-visible physical mappings */
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typedef struct GuestPhysBlockList {
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unsigned num;
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QTAILQ_HEAD(GuestPhysBlockHead, GuestPhysBlock) head;
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} GuestPhysBlockList;
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/* The physical and virtual address in the memory mapping are contiguous. */
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typedef struct MemoryMapping {
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hwaddr phys_addr;
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target_ulong virt_addr;
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ram_addr_t length;
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QTAILQ_ENTRY(MemoryMapping) next;
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} MemoryMapping;
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struct MemoryMappingList {
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unsigned int num;
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MemoryMapping *last_mapping;
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QTAILQ_HEAD(, MemoryMapping) head;
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};
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/*
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* add or merge the memory region [phys_addr, phys_addr + length) into the
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* memory mapping's list. The region's virtual address starts with virt_addr,
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* and is contiguous. The list is sorted by phys_addr.
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*/
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void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
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hwaddr phys_addr,
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hwaddr virt_addr,
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ram_addr_t length);
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void memory_mapping_list_free(MemoryMappingList *list);
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void memory_mapping_list_init(MemoryMappingList *list);
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void guest_phys_blocks_free(GuestPhysBlockList *list);
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void guest_phys_blocks_init(GuestPhysBlockList *list);
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void guest_phys_blocks_append(GuestPhysBlockList *list);
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void qemu_get_guest_memory_mapping(MemoryMappingList *list,
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const GuestPhysBlockList *guest_phys_blocks,
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Error **errp);
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/* get guest's memory mapping without do paging(virtual address is 0). */
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void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
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const GuestPhysBlockList *guest_phys_blocks);
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void memory_mapping_filter(MemoryMappingList *list, int64_t begin,
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int64_t length);
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#endif
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