Re: [Qemu-devel] [BUG] Possible ACPI regression in v2.1.0

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Aug 20, 2014 at 04:41:25PM -0400, Luiz Capitulino wrote:
> 
> Starting a QEMU instance manually configured to boot a Fedora installation
> kernel with the -kernel/-initrd command-line options cause ACPI to brake
> in the guest with the following messages:

Thanks.
Please try
[PATCH] pc: reserve more memory for ACPI for new machine types
that I just sent.


> [    0.000000] ACPI: uC\xffffffcdT 000000003ffe1854 2009587B (v49 \xffffffb2?a\xffffffdf?? \xffffffca\xffffffe2???\xffffffa6K\xfffffffc 4CFA21C8 \xffffffa1\xfffffff5\xffffffa5[ 2AA2CAF0)
> [    0.000000] ------------[ cut here ]------------
> [    0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:536 __early_ioremap+0x12b/0x1ce()
> [    0.000000] Modules linked in:
> [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.11.10-301.fc20.x86_64 #1
> [    0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
> [    0.000000]  0000000000000009 ffffffff81c01d58 ffffffff816441db 0000000000000000
> [    0.000000]  ffffffff81c01d90 ffffffff8106715d 0000000000000000 000000003ffe1000
> [    0.000000]  0000000000000000 0000000000000854 0000000000000000 ffffffff81c01da0
> [    0.000000] Call Trace:
> [    0.000000]  [<ffffffff816441db>] dump_stack+0x45/0x56
> [    0.000000]  [<ffffffff8106715d>] warn_slowpath_common+0x7d/0xa0
> [    0.000000]  [<ffffffff8106723a>] warn_slowpath_null+0x1a/0x20
> [    0.000000]  [<ffffffff81d264a1>] __early_ioremap+0x12b/0x1ce
> [    0.000000]  [<ffffffff81d26371>] ? __early_set_fixmap+0x97/0x9c
> [    0.000000]  [<ffffffff81d2672a>] early_ioremap+0x13/0x15
> [    0.000000]  [<ffffffff81d1e173>] __acpi_map_table+0x13/0x18
> [    0.000000]  [<ffffffff8163dbaa>] acpi_os_map_memory+0x26/0x14e
> [    0.000000]  [<ffffffff81d51037>] acpi_tb_parse_root_table+0x187/0x2c3
> [    0.000000]  [<ffffffff813863c9>] ? acpi_find_root_pointer+0x11b/0x15e
> [    0.000000]  [<ffffffff81d511ca>] acpi_initialize_tables+0x57/0x59
> [    0.000000]  [<ffffffff81d4ef97>] acpi_table_init+0x1b/0x99
> [    0.000000]  [<ffffffff81d1e523>] acpi_boot_table_init+0x1e/0x85
> [    0.000000]  [<ffffffff81d1609f>] setup_arch+0xbc3/0xcec
> [    0.000000]  [<ffffffff81d0ebbc>] start_kernel+0xcf/0x416
> [    0.000000]  [<ffffffff81d0e120>] ? early_idt_handlers+0x120/0x120
> [    0.000000]  [<ffffffff81d0e5de>] x86_64_start_reservations+0x2a/0x2c
> [    0.000000]  [<ffffffff81d0e6e8>] x86_64_start_kernel+0x108/0x117
> [    0.000000] ---[ end trace 0d4a133504d48174 ]---
> 
> ...
> 
> [    0.148843] ACPI: Interpreter disabled
> 
> As the ACPI support in the guest kernel is not functional, QEMU won't be
> notified when the guest is powered off by the user which in turn won't
> cause QEMU to emit QMP events and change the RunState from "running" to
> "paused". This in turn cause problems to libvirt too.
> 
> I bisected this and the culprit is:
> 
> commit 868270f23d8db2cce83e4f082fe75e8625a5fbf9
> Author: Michael S. Tsirkin <mst@redhat.com>
> Date:   Mon Jul 28 23:07:11 2014 +0200
> 
>     acpi-build: tweak acpi migration limits
> 
> Indeed, if I revert that commit everything works as expected.
> 
> Here is my full reproducer. Please, note that I didn't cook that reproducer
> myself. This problem was originally reported as a libvirt/QMP problem.
> 
> 1. Download initrd.img and vmlinuz from  a fedora mirror (eg. http://fedora.mirror.lstn.net/releases/20/Fedora/x86_64/os/images/pxeboot/)
> 
> 2. Run QEMU with:
> 
> # qemu -enable-kvm -m 1024 -no-shutdown \
>     -boot strict=on -kernel /home/lcapitulino/files/vmlinuz \
>     -initrd /home/lcapitulino/files/initrd.img \
>     -append method=http://fedora.mirror.lstn.net/releases/20/Fedora/x86_64/os/  \
>     -drive file=/var/lib/libvirt/images/rhel7.img,if=virtio \
>     -monitor stdio -vnc :0 -qmp tcp:0:4444,nowait,server
> 
> 3. After the kernel boots, switch to to the installer shell:
> 
> (qemu) sendkey ctrl-alt-f2
> 
> 4. Check if the kernel's ACPI interpreter has been enabled
> 
> # dmesg | grep -i interpreter
> [    0.148843] ACPI: Interpreter disabled