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Re: [Qemu-devel] [PATCH v2 6/6] i8259: add -no-spurious-interrupt-hack o
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [PATCH v2 6/6] i8259: add -no-spurious-interrupt-hack option |
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Date: |
Mon, 27 Aug 2012 16:23:02 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0 |
Il 27/08/2012 15:55, Anthony Liguori ha scritto:
>> > This patch provides a way to optionally suppress spurious interrupts,
>> > as a workaround for systems described below:
>> >
>> > Some old operating systems do not handle spurious interrupts well,
>> > and qemu tends to generate them significantly more often than
>> > real hardware.
> This is the wrong approach. You add a LostTickPolicy property to the
> i8259 device.
Isn't the i8254 the one that would need a LostTickPolicy?
But this seems like a bug that is either in the i8259 emulation, or in
the firmware. Your own suggestion of setting IRQ2 to level-triggered in
SeaBIOS is definitely a good one.
Paolo
- Re: [Qemu-devel] [PATCH v2 1/6] fix some debug printf format strings, (continued)
- [Qemu-devel] [PATCH v2 2/6] target-i386/translate.c: mov to/from crN/drN: ignore mod bits, Matthew Ogilvie, 2012/08/23
- [Qemu-devel] [PATCH v2 3/6] vl: fix -hdachs/-hda argument order parsing issues, Matthew Ogilvie, 2012/08/23
- [Qemu-devel] [PATCH v2 5/6] vga: add some optional CGA compatibility hacks, Matthew Ogilvie, 2012/08/23
- [Qemu-devel] [PATCH v2 4/6] qemu-options.hx: mention retrace= VGA option, Matthew Ogilvie, 2012/08/23
- [Qemu-devel] [PATCH v2 6/6] i8259: add -no-spurious-interrupt-hack option, Matthew Ogilvie, 2012/08/23
- Re: [Qemu-devel] [PATCH v2 6/6] i8259: add -no-spurious-interrupt-hack option, Anthony Liguori, 2012/08/27
Re: [Qemu-devel] [PATCH v2 0/6] Running Microport UNIX (ca 1987), malc, 2012/08/23
[Qemu-devel] [PATCH v3 0/3] Microport UNIX series (was: [PATCH v2 0/6] ...), Matthew Ogilvie, 2012/08/24
[Qemu-devel] [PATCH 1/3] debug printf (cirrus_vga): fixup unintended format change, Matthew Ogilvie, 2012/08/24
[Qemu-devel] [PATCH 3/3] doc: mention that -no-spurious-interrupt-hack doesn't work with KVM, Matthew Ogilvie, 2012/08/24
[Qemu-devel] [PATCH 2/3] vga cga_hack=palette_blanking: narrower conditions for hack, Matthew Ogilvie, 2012/08/24