From: Jan Kiszka <jan.kiszka@web.de>
To: Blue Swirl <blauwirbel@gmail.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH 11/22] i8259: Update IRQ state after reset
Date: Wed, 28 Sep 2011 23:18:03 +0200 [thread overview]
Message-ID: <4E838F0B.2010900@web.de> (raw)
In-Reply-To: <CAAu8pHv+UfBP7d4q=CnhisSoNRscKLFqfxBQm84fi18Rxkdi+Q@mail.gmail.com>
On 2011-09-28 20:01, Blue Swirl wrote:
> On Wed, Sep 28, 2011 at 11:00 AM, Jan Kiszka<jan.kiszka@siemens.com> wrote:
>> As we clearly modify the PIC state on pic_reset, we also have to update
>> the IRQ output. This only happened on init so far. Apply this
>> consistently.
>
> Nack, IRQ lines shouldn't be touched on reset. The other side may not
> be ready for receiving the interrupt change and qemu_irqs are
> stateless anyway.
Sorry, but failing to clear the line (this is what pic_update_irq will
effectively do) is a clear bug in the current code. This patch is 100%
analogue to what, e.g. the PCI layer does on reset. Please re-read.
Jan
next prev parent reply other threads:[~2011-09-28 21:18 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-28 11:00 [Qemu-devel] [PATCH 00/22] Rework i8259 and PC interrupt models Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 01/22] pc: Drop useless test from isa_irq_handler Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 02/22] pc: Generalize ISA IRQs to GSIs Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 03/22] pc: Convert GSIState::i8259_irq into array Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 04/22] pc: Fix and clean up PIC-to-APIC IRQ path Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 05/22] i8259: Remove premature inline function attributes Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 06/22] i8259: Drop obsolete prototypes Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 07/22] i8259: Move pic_set_irq1 after pic_update_irq Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 08/22] i8239: Introduce per-PIC output interrupt Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 09/22] i8259: Do not update IRQ output after spurious pic_poll_read Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 10/22] i8259: Reorder intack in pic_read_irq Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 11/22] i8259: Update IRQ state after reset Jan Kiszka
2011-09-28 18:01 ` Blue Swirl
2011-09-28 18:09 ` Peter Maydell
2011-09-28 18:42 ` Blue Swirl
2011-09-28 21:38 ` Peter Maydell
2011-09-29 19:35 ` Blue Swirl
2011-09-28 21:18 ` Jan Kiszka [this message]
2011-09-29 19:45 ` Blue Swirl
2011-09-30 6:47 ` Jan Kiszka
2011-09-30 9:14 ` Peter Maydell
2011-09-30 20:52 ` Blue Swirl
2011-09-30 20:47 ` Blue Swirl
2011-10-01 6:47 ` Jan Kiszka
2011-10-01 7:31 ` Blue Swirl
2011-10-02 16:27 ` Jan Kiszka
2011-10-02 19:01 ` Blue Swirl
2011-10-02 16:56 ` Avi Kivity
2011-10-02 19:13 ` Blue Swirl
2011-10-02 19:20 ` Avi Kivity
2011-10-02 19:39 ` Blue Swirl
2011-10-02 19:44 ` Avi Kivity
2011-10-02 19:49 ` Blue Swirl
2011-10-02 19:52 ` Avi Kivity
2011-10-02 19:59 ` Blue Swirl
2011-10-02 20:03 ` Avi Kivity
2011-10-02 20:11 ` Blue Swirl
2011-10-02 20:17 ` Avi Kivity
2011-10-02 20:26 ` Blue Swirl
2011-10-02 20:31 ` Avi Kivity
2011-10-02 20:36 ` Blue Swirl
2011-10-02 20:41 ` Avi Kivity
2011-10-02 20:55 ` Blue Swirl
2011-10-03 7:21 ` Paolo Bonzini
2011-10-04 12:12 ` Avi Kivity
2011-10-01 11:20 ` Peter Maydell
2011-10-02 16:39 ` Avi Kivity
2011-10-02 17:46 ` Jan Kiszka
2011-10-02 19:07 ` Avi Kivity
2011-10-02 19:15 ` Blue Swirl
2011-10-02 19:47 ` Jan Kiszka
2011-10-02 19:50 ` Avi Kivity
2011-10-02 19:06 ` Blue Swirl
2011-10-02 19:08 ` Avi Kivity
2011-10-02 19:26 ` Blue Swirl
2011-10-02 19:35 ` Avi Kivity
2011-10-02 19:40 ` Blue Swirl
2011-10-02 19:47 ` Avi Kivity
2011-10-02 19:52 ` Blue Swirl
2011-10-02 19:58 ` Avi Kivity
2011-10-02 20:05 ` Blue Swirl
2011-10-02 20:14 ` Avi Kivity
2011-10-02 20:18 ` Blue Swirl
2011-10-02 20:21 ` Avi Kivity
2011-10-02 20:30 ` Blue Swirl
2011-10-02 20:39 ` Avi Kivity
2011-10-02 20:53 ` Blue Swirl
2011-09-28 11:00 ` [Qemu-devel] [PATCH 12/22] i8259: Switch to per-PIC IRQ update Jan Kiszka
2011-09-28 11:00 ` [Qemu-devel] [PATCH 13/22] i8259: Fix poll command Jan Kiszka
2011-09-28 11:01 ` [Qemu-devel] [PATCH 14/22] i8259: Clean up pic_ioport_read Jan Kiszka
2011-09-28 11:01 ` [Qemu-devel] [PATCH 15/22] i8259: PREP: Replace pic_intack_read with pic_read_irq Jan Kiszka
2011-09-28 11:15 ` Alexander Graf
2011-09-28 11:01 ` [Qemu-devel] [PATCH 16/22] i8259: Replace PicState::pics_state with master flag Jan Kiszka
2011-09-28 11:01 ` [Qemu-devel] [PATCH 17/22] i8259: Eliminate PicState2 Jan Kiszka
2011-09-28 16:23 ` Richard Henderson
2011-09-28 16:29 ` Richard Henderson
2011-09-28 11:01 ` [Qemu-devel] [PATCH 18/22] qdev: Add HEX8 property Jan Kiszka
2011-09-28 11:01 ` [Qemu-devel] [PATCH 19/22] i8259: Convert to qdev Jan Kiszka
2011-09-28 11:01 ` [Qemu-devel] [PATCH 20/22] i8259: Fix coding style Jan Kiszka
2011-09-28 11:01 ` [Qemu-devel] [PATCH 21/22] monitor: Restrict pic/irq_info to supporting targets Jan Kiszka
2011-09-28 18:19 ` Blue Swirl
2011-09-28 21:26 ` Jan Kiszka
2011-09-29 19:29 ` Blue Swirl
2011-09-30 6:50 ` [Qemu-devel] [PATCH v2 " Jan Kiszka
2011-09-30 20:32 ` Blue Swirl
2011-09-28 11:01 ` [Qemu-devel] [PATCH 22/22] i8259: Move to hw library Jan Kiszka
2011-09-28 18:21 ` Blue Swirl
2011-09-28 21:50 ` [Qemu-devel] [PATCH v2 " Jan Kiszka
2011-09-28 16:39 ` [Qemu-devel] [PATCH 00/22] Rework i8259 and PC interrupt models Richard Henderson
2011-09-28 21:53 ` Jan Kiszka
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