From: Sergey Fedorov <serge.fdrv@gmail.com>
To: "Alex Bennée" <alex.bennee@linaro.org>,
"Sergey Fedorov" <sergey.fedorov@linaro.org>
Cc: qemu-devel@nongnu.org, mttcg@listserver.greensocs.com,
fred.konrad@greensocs.com, a.rigo@virtualopensystems.com,
cota@braap.org, bobby.prani@gmail.com, rth@twiddle.net,
patches@linaro.org, mark.burton@greensocs.com,
pbonzini@redhat.com, jan.kiszka@siemens.com,
peter.maydell@linaro.org, claudio.fontana@huawei.com,
Peter Crosthwaite <crosthwaite.peter@gmail.com>,
"Edgar E. Iglesias" <edgar.iglesias@gmail.com>,
Eduardo Habkost <ehabkost@redhat.com>,
Michael Walle <michael@walle.cc>,
Aurelien Jarno <aurelien@aurel32.net>,
Leon Alrae <leon.alrae@imgtec.com>,
Anthony Green <green@moxielogic.com>, Jia Liu <proljc@gmail.com>,
David Gibson <david@gibson.dropbear.id.au>,
Alexander Graf <agraf@suse.de>,
Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>,
Artyom Tarasenko <atar4qemu@gmail.com>,
Bastian Koppelmann <kbastian@mail.uni-paderborn.de>,
Guan Xuetao <gxt@mprc.pku.edu.cn>,
Max Filippov <jcmvbkbc@gmail.com>,
qemu-arm@nongnu.org, qemu-ppc@nongnu.org
Subject: Re: [PATCH v3 06/11] tcg: Introduce tb_mark_invalid() and tb_is_invalid()
Date: Thu, 14 Jul 2016 14:10:08 +0300 [thread overview]
Message-ID: <57877310.4070205@gmail.com> (raw)
In-Reply-To: <87y4544iv1.fsf@linaro.org>
On 14/07/16 13:25, Alex Bennée wrote:
> Sergey Fedorov <sergey.fedorov@linaro.org> writes:
>
>> > From: Sergey Fedorov <serge.fdrv@gmail.com>
>> >
>> > These functions will be used to make translation block invalidation safe
>> > with concurrent lockless lookup in the global hash table.
>> >
>> > Most targets don't use 'cs_base'; so marking TB as invalid is as simple
>> > as assigning -1 to 'cs_base'. SPARC target stores the next program
>> > counter into 'cs_base', and -1 is a fine invalid value since PC must bet
>> > a multiple of 4 in SPARC. The only odd target is i386, for which a
>> > special flag is introduced in place of removed 'HF_SOFTMMU_MASK'.
>> >
>> > Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
>> > Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
>> > Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
> This has merge conflicts with the current state of master. Is there
> anyway to have a common implementation that is specialised only when
> needed?
>
The point was to put the assumptions on invalid CPU TB state as close to
cpu_get_tb_cpu_state() definitions as possible. So that if anyone make
changes they can notice those assumptions and correct them if necessary.
Kind regards
Sergey
next prev parent reply other threads:[~2016-07-14 11:10 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1468354426-837-1-git-send-email-sergey.fedorov@linaro.org>
2016-07-12 20:13 ` [PATCH v3 06/11] tcg: Introduce tb_mark_invalid() and tb_is_invalid() Sergey Fedorov
2016-07-14 10:25 ` Alex Bennée
2016-07-14 11:10 ` Sergey Fedorov [this message]
2016-07-14 11:48 ` Paolo Bonzini
2016-07-14 12:04 ` Alex Bennée
2016-07-14 12:53 ` Alex Bennée
2016-07-14 13:00 ` Sergey Fedorov
2016-07-14 13:12 ` Paolo Bonzini
2016-07-14 13:15 ` Alex Bennée
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=57877310.4070205@gmail.com \
--to=serge.fdrv@gmail.com \
--cc=a.rigo@virtualopensystems.com \
--cc=agraf@suse.de \
--cc=alex.bennee@linaro.org \
--cc=atar4qemu@gmail.com \
--cc=aurelien@aurel32.net \
--cc=bobby.prani@gmail.com \
--cc=claudio.fontana@huawei.com \
--cc=cota@braap.org \
--cc=crosthwaite.peter@gmail.com \
--cc=david@gibson.dropbear.id.au \
--cc=edgar.iglesias@gmail.com \
--cc=ehabkost@redhat.com \
--cc=fred.konrad@greensocs.com \
--cc=green@moxielogic.com \
--cc=gxt@mprc.pku.edu.cn \
--cc=jan.kiszka@siemens.com \
--cc=jcmvbkbc@gmail.com \
--cc=kbastian@mail.uni-paderborn.de \
--cc=leon.alrae@imgtec.com \
--cc=mark.burton@greensocs.com \
--cc=mark.cave-ayland@ilande.co.uk \
--cc=michael@walle.cc \
--cc=mttcg@listserver.greensocs.com \
--cc=patches@linaro.org \
--cc=pbonzini@redhat.com \
--cc=peter.maydell@linaro.org \
--cc=proljc@gmail.com \
--cc=qemu-arm@nongnu.org \
--cc=qemu-devel@nongnu.org \
--cc=qemu-ppc@nongnu.org \
--cc=rth@twiddle.net \
--cc=sergey.fedorov@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).