From: Linus Torvalds <linus@torvalds.org>
To: speck@linutronix.de
Subject: [MODERATED] Re:
Date: Tue, 19 Feb 2019 10:49:41 -0800 [thread overview]
Message-ID: <CAHk-=wi4WeTSurs8h0pgcEZ1DjOe=FiLCt-u+1vuhAFE0Xcm3w@mail.gmail.com> (raw)
In-Reply-To: <20190219155859.834625575@infradead.org>
On Tue, Feb 19, 2019 at 8:03 AM speck for Peter Zijlstra
<speck@linutronix.de> wrote:
>
> When TFA is allowed (default); the MSR gets set when PMC3 gets
> scheduled and cleared when, after scheduling, PMC3 is unused.
>
> When TFA is not allowed; clear PMC3 from all constraints such that it
> will not get used.
I wonder if somebody wants a "abort always" mode for testing?
IOW, have a mode where even if PCM3 is not used, set the TSX_FORCE_ABORT bit.
That way people can actually verify that their code works even if it
sees TSX enabled and uses it (but it always aborts). Basically
verifying their fallback code.
Linus
next prev parent reply other threads:[~2019-02-19 18:50 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-19 15:58 [MODERATED] [PATCH 0/4] walnut 0 Peter Zijlstra
2019-02-19 15:58 ` [MODERATED] [PATCH 1/4] walnut 1 Peter Zijlstra
2019-02-19 15:58 ` [MODERATED] [PATCH 2/4] walnut 2 Peter Zijlstra
2019-02-19 15:58 ` [MODERATED] [PATCH 3/4] walnut 3 Peter Zijlstra
2019-02-19 15:58 ` [MODERATED] [PATCH 4/4] walnut 4 Peter Zijlstra
2019-02-19 16:10 ` [MODERATED] " Peter Zijlstra
2019-02-20 22:31 ` Nelson D'Souza
2019-02-22 22:58 ` [MODERATED] Fwd: " Nelson D'Souza
2019-02-22 23:19 ` Nelson D'Souza
2019-02-19 18:49 ` Linus Torvalds [this message]
2019-02-20 14:37 ` [MODERATED] Peter Zijlstra
2019-03-07 13:56 ` [MODERATED] Re: [PATCH 4/4] walnut 4 Greg KH
2019-03-07 14:34 ` Peter Zijlstra
2019-03-07 15:09 ` mark gross
2019-02-20 18:10 ` [MODERATED] Re: [PATCH 0/4] walnut 0 mark gross
2019-02-22 19:20 ` Nelson D'Souza
2019-03-01 18:59 ` mark gross
2019-10-21 20:22 [MODERATED] [PATCH v7 00/10] TAAv7 0 Pawan Gupta
2019-10-22 4:10 ` [MODERATED] Jon Masters
2019-10-22 5:53 ` [MODERATED] Pawan Gupta
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