Public bug reported:
I've built qemu-kvm and seabios from the latest git sources, and found
that the system_reset monitor command causes a freeze if I start qemu-
system-x86_64 with the -no-kvm flag. This is a serial log from an
attempt at rebooting:
$ ./x86_64-softmmu/qemu-system-x86_64 -monitor stdio -bios
../seabios/out/bios.bin -serial /dev/stdout -no-kvm
QEMU 0.14.50 monitor - type 'help' for more information
(qemu) Changing serial settings was 0/0 now 3/0
Start bios (version pre-0.6.3-20110309_171929-desk4)
Ram Size=0x08000000 (0x0000000000000000 high)
CPU Mhz=2202
PCI: pci_bios_init_bus_rec bus = 0x0
PIIX3/PIIX4 init: elcr=00 0c
PCI: bus=0 devfn=0x00: vendor_id=0x8086 device_id=0x1237
PCI: bus=0 devfn=0x08: vendor_id=0x8086 device_id=0x7000
PCI: bus=0 devfn=0x09: vendor_id=0x8086 device_id=0x7010
region 4: 0x0000c000
PCI: bus=0 devfn=0x0b: vendor_id=0x8086 device_id=0x7113
PCI: bus=0 devfn=0x10: vendor_id=0x1013 device_id=0x00b8
region 0: 0xf0000000
region 1: 0xf2000000
region 6: 0xf2010000
PCI: bus=0 devfn=0x18: vendor_id=0x10ec device_id=0x8139
region 0: 0x0000c100
region 1: 0xf2020000
region 6: 0xf2030000
Found 1 cpu(s) max supported 1 cpu(s)
MP table addr=0x000fdb40 MPC table addr=0x000fdb50 size=224
SMBIOS ptr=0x000fdb20 table=0x07fffef0
ACPI tables: RSDP=0x000fdaf0 RSDT=0x07ffd6a0
Scan for VGA option rom
Running option rom at c000:0003
Turning on vga text mode console
SeaBIOS (version pre-0.6.3-20110309_171929-desk4)
PS2 keyboard initialized
Found 1 lpt ports
Found 1 serial ports
ATA controller 0 at 1f0/3f4/0 (irq 14 dev 9)
ATA controller 1 at 170/374/0 (irq 15 dev 9)
DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD]
Searching bootorder for: /pci@i0cf8/*@1,1/drive@1/disk@0
Scan for option roms
Running option rom at c900:0003
pnp call arg1=60
pmm call arg1=0
pmm call arg1=2
pmm call arg1=0
Searching bootorder for: /pci@i0cf8/*@3
Searching bootorder for: /rom@genroms/vapic.bin
Running option rom at c980:0003
ebda moved from 9fc00 to 9f400
Returned 53248 bytes of ZoneHigh
e820 map has 6 items:
0: 0000000000000000 - 000000000009f400 = 1
1: 000000000009f400 - 00000000000a0000 = 2
2: 00000000000f0000 - 0000000000100000 = 2
3: 0000000000100000 - 0000000007ffd000 = 1
4: 0000000007ffd000 - 0000000008000000 = 2
5: 00000000fffc0000 - 0000000100000000 = 2
enter handle_19:
NULL
Booting from DVD/CD...
Device reports MEDIUM NOT PRESENT
atapi_is_ready returned -1
Boot failed: Could not read from CDROM (code 0003)
enter handle_18:
NULL
Booting from ROM...
Booting from c900:0336
(qemu)
(qemu) system_reset
(qemu) RESET REQUESTEDChanging serial settings was 0/0 now 3/0
Start bios (version pre-0.6.3-20110309_171929-desk4)
Attempting a hard reboot
prep_reset
apm_shutdown?
i8042_reboot
i8042: wait to write...
i8042: outb
RESET REQUESTED
(qemu)
(qemu)
(qemu)
(qemu) info cpus
* CPU #0: pc=0x00000000fffffff0 thread_id=18125
(qemu) system_reset
(qemu) RESET REQUESTED
(qemu)
(qemu) q
I've tried fiddling a few build options in SeaBIOS but I'm not sure
that's where the issue lies. The RESET REQUESTED is me adding some
extra debug to vl.c:1477 in the clause that tests for a reset request,
and the i8042: lines are debug lines from seabios tracing the execution
of the reset request.
This may be a bug in SeaBIOS of course, since I can replicate the
behaviour on my distro's qemu and kvm packages. However it seems odd
that qemu behaves differently with KVM turned on (i.e. system_reset
works) than with it disabled.
** Affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/732155
Title:
system_reset doesn't work with qemu-kvm and latest SeaBIOS
Status in QEMU:
New
Bug description:
I've built qemu-kvm and seabios from the latest git sources, and found
that the system_reset monitor command causes a freeze if I start qemu-
system-x86_64 with the -no-kvm flag. This is a serial log from an
attempt at rebooting:
$ ./x86_64-softmmu/qemu-system-x86_64 -monitor stdio -bios
../seabios/out/bios.bin -serial /dev/stdout -no-kvm
QEMU 0.14.50 monitor - type 'help' for more information
(qemu) Changing serial settings was 0/0 now 3/0
Start bios (version pre-0.6.3-20110309_171929-desk4)
Ram Size=0x08000000 (0x0000000000000000 high)
CPU Mhz=2202
PCI: pci_bios_init_bus_rec bus = 0x0
PIIX3/PIIX4 init: elcr=00 0c
PCI: bus=0 devfn=0x00: vendor_id=0x8086 device_id=0x1237
PCI: bus=0 devfn=0x08: vendor_id=0x8086 device_id=0x7000
PCI: bus=0 devfn=0x09: vendor_id=0x8086 device_id=0x7010
region 4: 0x0000c000
PCI: bus=0 devfn=0x0b: vendor_id=0x8086 device_id=0x7113
PCI: bus=0 devfn=0x10: vendor_id=0x1013 device_id=0x00b8
region 0: 0xf0000000
region 1: 0xf2000000
region 6: 0xf2010000
PCI: bus=0 devfn=0x18: vendor_id=0x10ec device_id=0x8139
region 0: 0x0000c100
region 1: 0xf2020000
region 6: 0xf2030000
Found 1 cpu(s) max supported 1 cpu(s)
MP table addr=0x000fdb40 MPC table addr=0x000fdb50 size=224
SMBIOS ptr=0x000fdb20 table=0x07fffef0
ACPI tables: RSDP=0x000fdaf0 RSDT=0x07ffd6a0
Scan for VGA option rom
Running option rom at c000:0003
Turning on vga text mode console
SeaBIOS (version pre-0.6.3-20110309_171929-desk4)
PS2 keyboard initialized
Found 1 lpt ports
Found 1 serial ports
ATA controller 0 at 1f0/3f4/0 (irq 14 dev 9)
ATA controller 1 at 170/374/0 (irq 15 dev 9)
DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD]
Searching bootorder for: /pci@i0cf8/*@1,1/drive@1/disk@0
Scan for option roms
Running option rom at c900:0003
pnp call arg1=60
pmm call arg1=0
pmm call arg1=2
pmm call arg1=0
Searching bootorder for: /pci@i0cf8/*@3
Searching bootorder for: /rom@genroms/vapic.bin
Running option rom at c980:0003
ebda moved from 9fc00 to 9f400
Returned 53248 bytes of ZoneHigh
e820 map has 6 items:
0: 0000000000000000 - 000000000009f400 = 1
1: 000000000009f400 - 00000000000a0000 = 2
2: 00000000000f0000 - 0000000000100000 = 2
3: 0000000000100000 - 0000000007ffd000 = 1
4: 0000000007ffd000 - 0000000008000000 = 2
5: 00000000fffc0000 - 0000000100000000 = 2
enter handle_19:
NULL
Booting from DVD/CD...
Device reports MEDIUM NOT PRESENT
atapi_is_ready returned -1
Boot failed: Could not read from CDROM (code 0003)
enter handle_18:
NULL
Booting from ROM...
Booting from c900:0336
(qemu)
(qemu) system_reset
(qemu) RESET REQUESTEDChanging serial settings was 0/0 now 3/0
Start bios (version pre-0.6.3-20110309_171929-desk4)
Attempting a hard reboot
prep_reset
apm_shutdown?
i8042_reboot
i8042: wait to write...
i8042: outb
RESET REQUESTED
(qemu)
(qemu)
(qemu)
(qemu) info cpus
* CPU #0: pc=0x00000000fffffff0 thread_id=18125
(qemu) system_reset
(qemu) RESET REQUESTED
(qemu)
(qemu) q
I've tried fiddling a few build options in SeaBIOS but I'm not sure
that's where the issue lies. The RESET REQUESTED is me adding some
extra debug to vl.c:1477 in the clause that tests for a reset request,
and the i8042: lines are debug lines from seabios tracing the
execution of the reset request.
This may be a bug in SeaBIOS of course, since I can replicate the
behaviour on my distro's qemu and kvm packages. However it seems odd
that qemu behaves differently with KVM turned on (i.e. system_reset
works) than with it disabled.
