From: Anthony Liguori <anthony@codemonkey.ws>
To: qemu-devel@nongnu.org
Cc: eak@us.ibm.com
Subject: Re: [Qemu-devel] [PATCH 2/2] Add code to override IRQ 0 to INTI 2
Date: Mon, 27 Oct 2008 14:52:58 -0500 [thread overview]
Message-ID: <49061C1A.1030008@codemonkey.ws> (raw)
In-Reply-To: <49061B2B.702@redhat.com>
Avi Kivity wrote:
> Beth Kon wrote:
>> This patch, provided by Anthony Liguori, maps IRQ0 to INTI2.
>>
>>
>
> This will cause problems for kvm, which maps interrupts 1:1 without
> exceptions. While we could add support for remapping, it would mean
> that older kernels would not be able to support an hpet.
>
> Isn't it possible to connect the hpet to pic irq 2 and ioapic irq 2,
> maintaining the 1:1 mapping?
The APIC spec says that the hpet must be connected to APIC IRQ 0 and
IOAPIC IRQ 2. I don't understand GSI very well, but I think this is the
normally remapping of interrupts that would occur as opposed to
something device specific.
Regards,
Anthony Liguori
> (what's irq 2 connected to now?)
>
next prev parent reply other threads:[~2008-10-27 19:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-27 18:26 [Qemu-devel] [PATCH 2/2] Add code to override IRQ 0 to INTI 2 Beth Kon
2008-10-27 19:48 ` Avi Kivity
2008-10-27 19:52 ` Anthony Liguori [this message]
2008-10-27 23:02 ` Beth Kon
2008-10-28 12:47 ` Avi Kivity
2008-10-27 20:02 ` Avi Kivity
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