From: Borislav Petkov <bp@alien8.de>
To: Bandan Das <bsd@redhat.com>
Cc: Randy Dunlap <rdunlap@infradead.org>,
Ramakrishna Saripalli <rsaripal@amd.com>,
linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de,
mingo@redhat.com, Jonathan Corbet <corbet@lwn.net>
Subject: Re: [PATCH 4/4] x86/speculation: Add PSF mitigation kernel parameters
Date: Wed, 21 Apr 2021 20:48:26 +0200 [thread overview]
Message-ID: <20210421184826.GA3120@zn.tnic> (raw)
In-Reply-To: <jpg4kfzfpzm.fsf@linux.bootlegged.copy>
On Wed, Apr 21, 2021 at 02:32:13PM -0400, Bandan Das wrote:
> Maybe, rename the parameter to something like psfd_disable, then off
> -> disables mitigation and on -> enables it. Or just rewriting this to
> off -> turns off predictive store forwarding is probably ok too.
Yes:
off - Turns off predictive store forwarding.
on - Turns on...
Ramakrishna, you don't have to call this a mitigation - this is a flag
which controls the feature.
Also, those 4 patches can be merged into a single one which simply adds
the feature along with the boot-time controls.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-04-21 18:50 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-21 9:01 [PATCH 0/4] Introduce support for PSF mitigation Ramakrishna Saripalli
2021-04-21 9:01 ` [PATCH 1/4] x86/cpufeatures: Define feature bits to support mitigation of PSF Ramakrishna Saripalli
2021-04-21 9:01 ` [PATCH 2/4] x86/speculation: Introduce SPEC_CTRL_MSR bit for PSFD Ramakrishna Saripalli
2021-04-21 9:01 ` [PATCH 3/4] x86/speculation: Implement PSF mitigation support Ramakrishna Saripalli
2021-04-21 9:01 ` [PATCH 4/4] x86/speculation: Add PSF mitigation kernel parameters Ramakrishna Saripalli
2021-04-21 16:04 ` Randy Dunlap
2021-04-21 18:32 ` Bandan Das
2021-04-21 18:36 ` Saripalli, RK
2021-04-21 18:48 ` Borislav Petkov [this message]
2021-04-21 18:55 ` Saripalli, RK
2021-04-21 18:57 ` Borislav Petkov
2021-04-21 19:05 ` Saripalli, RK
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