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Re: [Qemu-devel] Questions about acpi interrupt link device's ‘_PRS' fi
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] Questions about acpi interrupt link device's ‘_PRS' field |
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Date: |
Wed, 10 Apr 2019 17:55:17 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 |
On 10/04/19 16:33, Li Qiang wrote:
> Hi all,
>
>
>
> I see the link device ‘_PRS’ uses irq line 5, 10, 11 in
> ‘build_link_dev’ function.
>
> But I never see the 5 lines uses in the guest, just uses 10 and 11.
>
> Why this happen? Maybe related with the guest?
Because the MADT table tells the guest to only use lines 10 and 11. The
BIOS configures the chipset that way.
Paolo