From: Paolo Bonzini <pbonzini@redhat.com>
To: Pavel Dovgaluk <Pavel.Dovgaluk@ispras.ru>, qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, peter.crosthwaite@xilinx.com,
mark.burton@greensocs.com, real@ispras.ru, batuzovk@ispras.ru,
maria.klimushenkova@ispras.ru, alex.bennee@linaro.org,
afaerber@suse.de, fred.konrad@greensocs.com
Subject: Re: [Qemu-devel] [RFC PATCH v5 07/31] icount: implement icount requesting
Date: Fri, 05 Dec 2014 12:43:48 +0100 [thread overview]
Message-ID: <54819A74.9090607@redhat.com> (raw)
In-Reply-To: <001301d0107a$0388b5d0$0a9a2170$@Dovgaluk@ispras.ru>
On 05/12/2014 11:55, Pavel Dovgaluk wrote:
>> >
>> > And why is can_do_io zero? :) Is the fix to move the place where
>> > can_do_io becomes nonzero?
> can_do_io is set by gen_io_start function.
> As I understand, it is used to protect determinism in icount mode,
> because it allows non-deterministic (port io, raising interrupt)
> operations only at the end of the translation blocks.
> When someone tries to use MMIO in the middle of TB, that TB is
> recompiled to place this instruction at the end of the block.
>
> Do you mean that we can set can_do_io before execution of the block
> and reset it at the beginning of the execution?
Yes, we could try setting it after execution of the block and clearing
it afterwards. Peter knows that part of icount better though (I know
mostly the timer/warping parts).
Paolo
next prev parent reply other threads:[~2014-12-05 11:44 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-26 10:38 [Qemu-devel] [RFC PATCH v5 00/31] Deterministic replay and reverse execution Pavel Dovgalyuk
2014-11-26 10:38 ` [Qemu-devel] [RFC PATCH v5 01/31] cpu-exec: fix cpu_exec_nocache Pavel Dovgalyuk
2014-11-26 10:38 ` [Qemu-devel] [RFC PATCH v5 02/31] acpi: accurate overflow check Pavel Dovgalyuk
2014-11-26 13:15 ` Paolo Bonzini
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 03/31] replay: global variables and function stubs Pavel Dovgalyuk
2014-11-26 15:32 ` Eric Blake
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 04/31] sysemu: system functions for replay Pavel Dovgalyuk
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 05/31] replay: internal functions for replay log Pavel Dovgalyuk
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 06/31] cpu-exec: reset exception_index correctly Pavel Dovgalyuk
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 07/31] icount: implement icount requesting Pavel Dovgalyuk
2014-12-03 10:17 ` Paolo Bonzini
2014-12-04 11:02 ` Pavel Dovgaluk
2014-12-04 15:50 ` Paolo Bonzini
2014-12-05 5:34 ` Pavel Dovgaluk
2014-12-05 10:36 ` Paolo Bonzini
2014-12-05 10:55 ` Pavel Dovgaluk
2014-12-05 11:43 ` Paolo Bonzini [this message]
2014-12-05 12:59 ` Pavel Dovgaluk
[not found] ` <12880.8243353435$1417784373@news.gmane.org>
2014-12-05 15:13 ` Paolo Bonzini
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 08/31] icount: improve enable/disable ticks Pavel Dovgalyuk
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 09/31] replay: introduce icount event Pavel Dovgalyuk
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 10/31] i386: do not cross the pages boundaries in replay mode Pavel Dovgalyuk
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 11/31] From 7abf2f72777958d395cfd01d97fe707cc06152b5 Mon Sep 17 00:00:00 2001 Pavel Dovgalyuk
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 12/31] From 185a3a47d08857a66332ae862b372a153ce92bb9 " Pavel Dovgalyuk
2014-11-26 10:39 ` [Qemu-devel] [RFC PATCH v5 13/31] From a0cb9e80ba0de409b5ad556109a1c71ce4d8ce19 " Pavel Dovgalyuk
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 14/31] From 04bbd21134dd2c6b7309a7f5f2b780aae2757003 " Pavel Dovgalyuk
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 15/31] cpu-exec: allow temporary disabling icount Pavel Dovgalyuk
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 16/31] cpu-exec: invalidate nocache translation if they are interrupted Pavel Dovgalyuk
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 17/31] replay: interrupts and exceptions Pavel Dovgalyuk
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 18/31] replay: asynchronous events infrastructure Pavel Dovgalyuk
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 19/31] cpu: replay instructions sequence Pavel Dovgalyuk
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 20/31] replay: recording and replaying clock ticks Pavel Dovgalyuk
2014-11-26 10:52 ` Paolo Bonzini
2014-11-26 12:22 ` Pavel Dovgaluk
2014-11-26 12:51 ` Paolo Bonzini
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 21/31] replay: recording and replaying different timers Pavel Dovgalyuk
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 22/31] timer: introduce new QEMU_CLOCK_VIRTUAL_RT clock Pavel Dovgalyuk
2014-11-26 11:04 ` Paolo Bonzini
2014-11-26 12:27 ` Pavel Dovgaluk
2014-11-27 9:11 ` Pavel Dovgaluk
2014-11-27 16:53 ` Paolo Bonzini
2014-11-28 7:52 ` Pavel Dovgaluk
2014-11-28 11:28 ` Pavel Dovgaluk
2014-11-28 12:40 ` Paolo Bonzini
2014-11-26 10:40 ` [Qemu-devel] [RFC PATCH v5 23/31] cpus: make icount warp deterministic in replay mode Pavel Dovgalyuk
2014-11-26 11:26 ` Paolo Bonzini
2014-11-26 10:41 ` [Qemu-devel] [RFC PATCH v5 24/31] replay: shutdown event Pavel Dovgalyuk
2014-11-26 10:41 ` [Qemu-devel] [RFC PATCH v5 25/31] replay: checkpoints Pavel Dovgalyuk
2014-11-26 10:41 ` [Qemu-devel] [RFC PATCH v5 26/31] replay: bottom halves Pavel Dovgalyuk
2014-11-26 10:41 ` [Qemu-devel] [RFC PATCH v5 27/31] replay: replay aio requests Pavel Dovgalyuk
2014-11-26 10:41 ` [Qemu-devel] [RFC PATCH v5 28/31] replay: thread pool Pavel Dovgalyuk
2014-11-26 10:41 ` [Qemu-devel] [RFC PATCH v5 29/31] replay: initialization and deinitialization Pavel Dovgalyuk
2014-11-26 10:41 ` [Qemu-devel] [RFC PATCH v5 30/31] replay: command line options Pavel Dovgalyuk
2014-11-26 10:41 ` [Qemu-devel] [RFC PATCH v5 31/31] replay: recording of the user input Pavel Dovgalyuk
2014-11-26 10:47 ` [Qemu-devel] [RFC PATCH v5 00/31] Deterministic replay and reverse execution Pavel Dovgaluk
2014-11-26 13:26 ` Paolo Bonzini
[not found] ` <5475b20f.841f8c0a.8e72.ffffa4f6SMTPIN_ADDED_BROKEN@mx.google.com>
2014-11-27 9:53 ` Artyom Tarasenko
2014-11-27 17:45 ` Paolo Bonzini
2014-11-28 9:39 ` Artyom Tarasenko
2014-11-28 7:51 ` Pavel Dovgaluk
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