[Qemu-devel] 回复： Re: Which part of qemu responds to ACPI control method?

[Qemu-devel] 回复： Re: Which part of qemu responds to ACPI control method?

[bobooscar]

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Take the method “_PTS” for example, how could I know how it access a certain hardware, and what hardware it accesses? I am a newbie in this field, thanks in advance;)


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-------- 原始邮件 --------
发件人： Laszlo Ersek <lersek@redhat.com> 
日期: 2013-07-02  23:57  (GMT+08:00) 
收件人： bobooscar <bobooscar@gmail.com> 
抄送： qemu-devel@nongnu.org 
主题： Re: [Qemu-devel] Which part of qemu responds to ACPI control method? 
 
On 07/02/13 15:05, bobooscar wrote:
> 
> Hi,all:
>     When a guest domain excutes a control method, such as  “_PTS”, which
> part of qemu would respond and handle the request? thank you in advance. 

IMHO, like any other method, _PTS (Prepare To Sleep) is executed by the
guest's ACPI interpreter, and qemu responds only to the hardware
accesses that the method makes.

Laszlo

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Re: [Qemu-devel] 回复： Re: Which part of qemu responds to ACPI control method?

[Laszlo Ersek]

On 07/03/13 04:14, bobooscar wrote:
> Take the method “_PTS” for example, how could I know how it access a
> certain hardware, and what hardware it accesses? I am a newbie in this
> field, thanks in advance;)

In "POSIX-like" guests, you can dump the ACPI tables with the "acpidump"
utility (pmtools package), eg.

  acpidump --table DSDT --output DSDT.aml --binary

then decompile it with "iasl":

  iasl -d DSDT.aml

This creates "DSDT.dsl", a decompiled ACPI Source Language file. You can
interpret it by consulting the ACPI specification
<http://www.acpi.info/spec50.htm>.

Laszlo