Hi, all 'virsh dump' can not work when host pci device is used by guest. We have discussed this issue here: http://lists.nongnu.org/archive/html/qemu-devel/2011-10/msg00736.html
The last version is here: http://lists.nongnu.org/archive/html/qemu-devel/2012-02/msg04228.html We have determined to introduce a new command dump to dump memory. The core file's format can be elf. Note: 1. The guest should be x86 or x86_64. The other arch is not supported now. 2. If you use old gdb, gdb may crash. I use gdb-7.3.1, and it does not crash. 3. If the OS is in the second kernel, gdb may not work well, and crash can work by specifying '--machdep phys_addr=xxx' in the command line. The reason is that the second kernel will update the page table, and we can not get the page table for the first kernel. 4. The cpu's state is stored in QEMU note. You neet to modify crash to use it to calculate phys_base. 5. If the guest OS is 32 bit and the memory size is larger than 4G, the vmcore is elf64 format. You should use the gdb which is built with --enable-64-bit-bfd. 6. This patchset is based on the upstream tree, and apply one patch that is still in Luiz Capitulino's tree, because I use the API qemu_get_fd() in this patchset. Changes from v7 to v8: 1. addressed Hatayama's comments Changes from v6 to v7: 1. addressed Jan's comments 2. fix some bugs 3. store cpu's state into the vmcore Changes from v5 to v6: 1. allow user to dump a fraction of the memory 2. fix some bugs Changes from v4 to v5: 1. convert the new command dump to QAPI Changes from v3 to v4: 1. support it to run asynchronously 2. add API to cancel dumping and query dumping progress 3. add API to control dumping speed 4. auto cancel dumping when the user resumes vm, and the status is failed. Changes from v2 to v3: 1. address Jan Kiszka's comment Changes from v1 to v2: 1. fix virt addr in the vmcore. Wen Congyang (16): Add API to create memory mapping list Add API to check whether a physical address is I/O address implement cpu_get_memory_mapping() Add API to check whether paging mode is enabled Add API to get memory mapping Add API to get memory mapping without do paging target-i386: Add API to write elf notes to core file target-i386: Add API to write cpu status to core file target-i386: add API to get dump info make gdb_id() generally avialable introduce a new monitor command 'dump' to dump guest's memory support to cancel the current dumping support to query dumping status run dump at the background support detached dump allow user to dump a fraction of the memory Makefile.target | 3 + configure | 8 + cpu-all.h | 66 +++ cpu-common.h | 2 + dump.c | 980 +++++++++++++++++++++++++++++++++++++ dump.h | 23 + elf.h | 5 + exec.c | 11 + gdbstub.c | 9 - gdbstub.h | 9 + hmp-commands.hx | 44 ++ hmp.c | 89 ++++ hmp.h | 3 + memory_mapping.c | 290 +++++++++++ memory_mapping.h | 60 +++ monitor.c | 7 + qapi-schema.json | 58 +++ qmp-commands.hx | 110 +++++ target-i386/arch_dump.c | 433 ++++++++++++++++ target-i386/arch_memory_mapping.c | 271 ++++++++++ vl.c | 5 +- 21 files changed, 2475 insertions(+), 11 deletions(-) create mode 100644 dump.c create mode 100644 dump.h create mode 100644 memory_mapping.c create mode 100644 memory_mapping.h create mode 100644 target-i386/arch_dump.c create mode 100644 target-i386/arch_memory_mapping.c
