From: Gleb Natapov <gleb@redhat.com>
To: Blue Swirl <blauwirbel@gmail.com>
Cc: Jan Kiszka <jan.kiszka@web.de>,
qemu-devel@nongnu.org, Juan Quintela <quintela@redhat.com>
Subject: Re: [Qemu-devel] Re: [RFT][PATCH 07/15] qemu_irq: Add IRQ handlers with delivery feedback
Date: Tue, 1 Jun 2010 21:30:58 +0300 [thread overview]
Message-ID: <20100601183058.GB6191@redhat.com> (raw)
In-Reply-To: <AANLkTilnc_dabMYaHU05cyAqoj5wbixq3OspyXKKfLEe@mail.gmail.com>
On Tue, Jun 01, 2010 at 06:00:20PM +0000, Blue Swirl wrote:
> >> > Looks like irr in apic is never cleared. Probably bug in userspace apic
> >> > emulation. I'll look into it. Try to route interrupt via APIC (not ExtInt),
> >> > or use qemu-kvm with in kernel irq chip.
> >>
> >> With APIC you mean Fixed? Then the IRQ is not delivered at all.
> > You need to deliver it through IOAPIC.
>
> In this version, when USE_APIC is defined, IRQs are routed via IOAPIC
> and APIC, PIC interrupts are disabled. Otherwise, IOAPIC and APIC are
> left to reset state and PIC is used.
>
> With the PIC version, there are bogus injections. With IOAPIC and APIC
> dots come at 2Hz. -enable-kvm has no effect.
I looked into this briefly. Virtual wire case is not handled correctly,
and pic lacks coalescing detection at all (the reason BTW because proper
solution was rejected, so only hack required by Windows was added).
Windows routes RTC interrupts through IOAPIC and this case works as you
can see. -enable-kvm on qemu should not make any difference since it
uses the same userspace pic/ioapic/apic code as TCG. It would be
interesting to try with qemu-kvm which uses in-kernel irq chips by
default.
BTW I managed to compile you test program with gcc 4.2. 4.4 and 4.3
produced non-working binaries for me.
--
Gleb.
next prev parent reply other threads:[~2010-06-01 18:31 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-24 20:13 [Qemu-devel] [RFT][PATCH 00/15] HPET cleanups, fixes, enhancements Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 01/15] hpet: Catch out-of-bounds timer access Jan Kiszka
2010-05-24 20:34 ` [Qemu-devel] " Juan Quintela
2010-05-24 20:36 ` Jan Kiszka
2010-05-24 20:50 ` Juan Quintela
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 02/15] hpet: Coding style cleanups and some refactorings Jan Kiszka
2010-05-24 20:37 ` [Qemu-devel] " Juan Quintela
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 03/15] hpet: Silence warning on write to running main counter Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 04/15] hpet: Move static timer field initialization Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 05/15] hpet: Convert to qdev Jan Kiszka
2010-05-25 9:37 ` Paul Brook
2010-05-25 10:14 ` Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 06/15] hpet: Start/stop timer when HPET_TN_ENABLE is modified Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 07/15] qemu_irq: Add IRQ handlers with delivery feedback Jan Kiszka
2010-05-25 6:07 ` Gleb Natapov
2010-05-25 6:31 ` Jan Kiszka
2010-05-25 6:40 ` Gleb Natapov
2010-05-25 6:54 ` Jan Kiszka
2010-05-25 19:09 ` [Qemu-devel] " Blue Swirl
2010-05-25 20:16 ` Anthony Liguori
2010-05-25 21:44 ` Jan Kiszka
2010-05-26 8:08 ` Gleb Natapov
2010-05-26 20:14 ` Blue Swirl
2010-05-27 5:42 ` Gleb Natapov
2010-05-26 19:55 ` Blue Swirl
2010-05-26 20:09 ` Jan Kiszka
2010-05-26 20:35 ` Blue Swirl
2010-05-26 22:35 ` Jan Kiszka
2010-05-26 23:26 ` Paul Brook
2010-05-27 17:56 ` Blue Swirl
2010-05-27 18:31 ` Jan Kiszka
2010-05-27 18:53 ` Blue Swirl
2010-05-27 19:08 ` Jan Kiszka
2010-05-27 19:19 ` Blue Swirl
2010-05-27 22:19 ` Jan Kiszka
2010-05-28 19:00 ` Blue Swirl
2010-05-30 12:00 ` Avi Kivity
2010-05-27 22:21 ` Paul Brook
2010-05-28 19:10 ` Blue Swirl
2010-05-27 22:21 ` Paul Brook
2010-05-27 6:13 ` Gleb Natapov
2010-05-27 18:37 ` Blue Swirl
2010-05-28 7:31 ` Gleb Natapov
2010-05-28 20:06 ` Blue Swirl
2010-05-28 20:47 ` Gleb Natapov
2010-05-29 7:58 ` Jan Kiszka
2010-05-29 9:35 ` Blue Swirl
2010-05-29 9:45 ` Jan Kiszka
2010-05-29 10:04 ` Blue Swirl
2010-05-29 10:16 ` Jan Kiszka
2010-05-29 10:26 ` Blue Swirl
2010-05-29 10:38 ` Jan Kiszka
2010-05-29 14:46 ` Gleb Natapov
2010-05-29 16:13 ` Blue Swirl
2010-05-29 16:37 ` Gleb Natapov
2010-05-29 21:21 ` Blue Swirl
2010-05-30 6:02 ` Gleb Natapov
2010-05-30 12:10 ` Blue Swirl
2010-05-30 12:24 ` Jan Kiszka
2010-05-30 12:58 ` Blue Swirl
2010-05-31 7:46 ` Jan Kiszka
2010-05-30 12:33 ` Gleb Natapov
2010-05-30 12:56 ` Blue Swirl
2010-05-30 13:49 ` Gleb Natapov
2010-05-30 16:54 ` Blue Swirl
2010-05-30 19:37 ` Blue Swirl
2010-05-30 20:07 ` Gleb Natapov
2010-05-30 20:21 ` Blue Swirl
2010-05-31 5:19 ` Gleb Natapov
2010-06-01 18:00 ` Blue Swirl
2010-06-01 18:30 ` Gleb Natapov [this message]
2010-06-02 19:05 ` Blue Swirl
2010-06-03 6:23 ` Jan Kiszka
2010-06-03 6:34 ` Gleb Natapov
2010-06-03 6:59 ` Jan Kiszka
2010-06-03 7:03 ` Gleb Natapov
2010-06-03 7:06 ` Gleb Natapov
2010-06-04 19:05 ` Blue Swirl
2010-06-05 0:04 ` Jan Kiszka
2010-06-05 7:20 ` Blue Swirl
2010-06-05 8:27 ` Jan Kiszka
2010-06-05 9:23 ` Blue Swirl
2010-06-05 12:14 ` Jan Kiszka
2010-06-06 7:15 ` Gleb Natapov
2010-06-06 7:39 ` Jan Kiszka
2010-06-06 7:49 ` Gleb Natapov
2010-06-06 8:07 ` Jan Kiszka
2010-06-06 9:23 ` Gleb Natapov
2010-06-06 10:10 ` Jan Kiszka
2010-06-06 10:27 ` Gleb Natapov
2010-06-06 7:39 ` Blue Swirl
2010-06-06 8:07 ` Gleb Natapov
2010-05-30 13:22 ` Blue Swirl
2010-05-29 9:15 ` Blue Swirl
2010-05-29 9:36 ` Jan Kiszka
2010-05-29 14:38 ` Gleb Natapov
2010-05-29 16:03 ` Blue Swirl
2010-05-29 16:32 ` Gleb Natapov
2010-05-29 20:52 ` Blue Swirl
2010-05-30 5:41 ` Gleb Natapov
2010-05-30 11:41 ` Blue Swirl
2010-05-30 11:52 ` Gleb Natapov
2010-05-30 12:05 ` Avi Kivity
2010-05-27 5:58 ` Gleb Natapov
2010-05-26 19:49 ` Blue Swirl
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 08/15] x86: Refactor RTC IRQ coalescing workaround Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 09/15] hpet/rtc: Rework RTC IRQ replacement by HPET Jan Kiszka
2010-05-25 9:29 ` Paul Brook
2010-05-25 10:23 ` Jan Kiszka
2010-05-25 11:05 ` Paul Brook
2010-05-25 11:19 ` Jan Kiszka
2010-05-25 11:23 ` Paul Brook
2010-05-25 11:26 ` Jan Kiszka
2010-05-25 12:03 ` Paul Brook
2010-05-25 12:39 ` Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 10/15] hpet: Drop static state Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 11/15] hpet: Add support for level-triggered interrupts Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 12/15] vmstate: Add VMSTATE_STRUCT_VARRAY_UINT8 Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 13/15] hpet: Make number of timers configurable Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 14/15] hpet: Add MSI support Jan Kiszka
2010-05-24 20:13 ` [Qemu-devel] [RFT][PATCH 15/15] monitor/QMP: Drop info hpet / query-hpet Jan Kiszka
2010-05-24 22:16 ` [Qemu-devel] [RFT][PATCH 00/15] HPET cleanups, fixes, enhancements Anthony Liguori
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