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Re: [Qemu-devel] [RFC qom-cpu v4 09/10] piix4: implement function cpu_st
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From: |
Vasilis Liaskovitis |
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Subject: |
Re: [Qemu-devel] [RFC qom-cpu v4 09/10] piix4: implement function cpu_status_write() for vcpu ejection |
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Date: |
Mon, 25 Nov 2013 19:38:06 +0100 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Nov 22, 2013 at 09:02:27AM +0100, Vasilis Liaskovitis wrote:
> Hi,
>
> On Wed, Oct 09, 2013 at 05:43:17PM +0800, Chen Fan wrote:
> > When OS eject a vcpu (like: echo 1 > /sys/bus/acpi/devices/LNXCPUXX/eject),
> > it will call acpi EJ0 method, the firmware will write the new cpumap, QEMU
> > will know which vcpu need to be ejected.
>
> I think that the _EJ0 callback (CPEJ method in
> hw/i386/acpi-dsdt-cpu-hotplug.dsl)
> currently does not write the new cpumap, it only sleeps. So cpu_state_write is
> never called on ejection, and the cpu objects remain allocated in qemu. Is
> there
> an updated version of the patchseries with a CPEJ that writes the new cpumap?
oops, never mind. I missed your seabios patch mentioned in the head message,
got it now.
thanks,
- Vasilis