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Re: [Qemu-devel] [PATCH v2 00/23] Rework i8259 and PC interrupt models
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [PATCH v2 00/23] Rework i8259 and PC interrupt models |
Date: |
Sun, 16 Oct 2011 14:22:44 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2011-10-16 14:07, malc wrote:
> On Sun, 16 Oct 2011, Blue Swirl wrote:
>
>> Thanks, applied all.
>>
>> On Fri, Oct 7, 2011 at 7:19 AM, Jan Kiszka <address@hidden> wrote:
>>> Highlights of this series:
>>> - generic i8259, now part of hwlib
>>> - qdev conversion of i8259
>>> - fix for i8259 poll mode (and removal of PREP hack)
>>>
>>> The refactoring will also be important to instantiate i8259-kvm devices
>>> for in-kernel irqchip acceleration one day.
>>>
>>> Changes in v2:
>>> - kept PIC irq state update after reset but clarified why this
>>> required and only valid here
>>> - additional fix: Clear ELCR on reset
>
> It's not cleared on reset on real hardware..
> http://www.mail-archive.com/address@hidden/msg04569.html
It is, see Intel chipset specs.
It is not cleared - and that was likely the bug you once saw - when only
the PIC goes through reset, triggered via an ICWS. But that is handled
as a separate case now, no need to worry.
Jan
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- [Qemu-devel] [PATCH v2 22/23] monitor: Restrict pic/irq_info to supporting targets, (continued)
- [Qemu-devel] [PATCH v2 22/23] monitor: Restrict pic/irq_info to supporting targets, Jan Kiszka, 2011/10/07
- [Qemu-devel] [PATCH v2 18/23] i8259: Eliminate PicState2, Jan Kiszka, 2011/10/07
- [Qemu-devel] [PATCH v2 20/23] i8259: Convert to qdev, Jan Kiszka, 2011/10/07
- [Qemu-devel] [PATCH v2 23/23] i8259: Move to hw library, Jan Kiszka, 2011/10/07
- Re: [Qemu-devel] [PATCH v2 00/23] Rework i8259 and PC interrupt models, Blue Swirl, 2011/10/15
- Re: [Qemu-devel] [PATCH v2 00/23] Rework i8259 and PC interrupt models, Blue Swirl, 2011/10/16