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[Qemu-devel] [PATCH v3 0/7] modify boot order of guest, and take effect
From: |
arei.gonglei |
Subject: |
[Qemu-devel] [PATCH v3 0/7] modify boot order of guest, and take effect after rebooting |
Date: |
Sat, 26 Jul 2014 12:45:26 +0800 |
From: Gonglei <address@hidden>
Sometimes, we want to modify boot order of a guest, but no need to
shutdown it. We can call dynamic changing bootindex of a guest, which
can be assured taking effect just after the guest rebooting.
For example, in P2V scene, we boot a guest and then attach a
new system disk, for copying some thing. We want to assign the
new disk as the booting disk, which means its bootindex=1.
Different nics can be assigen different bootindex dynamically
also make sense.
The patchsets add one qmp interface, and add an fw_cfg_machine_reset()
to achieve it.
Steps of testing:
./qemu-system-x86_64 -enable-kvm -m 4096 -smp 4 -name redhat6.2 -drive \
file=/home/redhat6.2.img,if=none,id=drive-ide0-0-0 \
-device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
-drive file=/home/RH-DVD1.iso,if=none,id=drive-ide0-0-1 \
-device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=4 \
-vnc 0.0.0.0:10 -netdev type=user,id=net0 \
-device virtio-net-pci,netdev=net0,bootindex=3,id=nic1 \
-netdev type=user,id=net1 -device e1000,netdev=net1,bootindex=2,id=nic2
-monitor stdio
QEMU 2.0.93 monitor - type 'help' for more information
(qemu) set-bootindex ide0-0-1 1
The bootindex 1 has already been used
(qemu) set-bootindex ide0-0-1 5 "/address@hidden"
(qemu) set-bootindex ide0-0-1 0
(qemu) system_reset
(qemu) set-bootindex ide0-0-1 1
The bootindex 1 has already been used
(qemu) set-bootindex nic2 0
The bootindex 0 has already been used
(qemu) set-bootindex ide0-0-1 -1
(qemu) set-bootindex nic2 0
(qemu) system_reset
(qemu)
Changes since v1:
*rework by Gerd's suggestion:
- split modify and del fw_boot_order for single function.
- change modify bootindex's realization which simply lookup
the device and modify the bootindex. if the new bootindex
has already used by another device just throw an error.
- change to del_boot_device_path(DeviceState *dev) and simply delete all
entries belonging to the device.
Changes since v2:
*address Gerd's reviewing suggestion:
- use the old entry's suffix, if the caller do not pass it in.
- call del_boot_device_path() from device_finalize() instead
of placing it into each individual device.
Thanks Gerd.
Gonglei (7):
bootindex: add modify_boot_device_path function
bootindex: add del_boot_device_path function
fw_cfg: add fw_cfg_machine_reset function
bootindex: delete bootindex when device is removed
qmp: add set-bootindex command
qemu-monitor: HMP set-bootindex wrapper
spapr: fix possible memory leak
hmp-commands.hx | 15 ++++++++++
hmp.c | 13 ++++++++
hmp.h | 1 +
hw/core/qdev.c | 2 ++
hw/nvram/fw_cfg.c | 54 +++++++++++++++++++++++++++++-----
hw/ppc/spapr.c | 1 +
include/hw/nvram/fw_cfg.h | 2 ++
include/sysemu/sysemu.h | 3 ++
qapi-schema.json | 16 ++++++++++
qmp-commands.hx | 24 +++++++++++++++
qmp.c | 17 +++++++++++
vl.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++
12 files changed, 216 insertions(+), 7 deletions(-)
--
1.7.12.4
- [Qemu-devel] [PATCH v3 0/7] modify boot order of guest, and take effect after rebooting,
arei.gonglei <=