From: Julien Thierry <jthierry@redhat.com>
To: linux-arm-kernel@lists.infradead.org
Subject: arm64: straight-line speculation status
Date: Thu, 21 Jan 2021 10:04:47 +0100 [thread overview]
Message-ID: <3cf0b8c6-c634-94b2-3799-a662e0e692a3@redhat.com> (raw)
Hi,
I was wondering, what is the status of mitigations for the arm
straight-line speculation[1] in linux?
It looks like some option was added to GCC to deal with branch and
return instructions, however it doesn't look like there is a kernel
config to use that compiler option.
Also, I would assume that BLR and RET instructions in assembly files
would also need to be adapted.
Has this already been discussed? Are there any works in progress or
plans associated with it?
[1]
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/frequently-asked-questions#SLS4
Thanks,
--
Julien Thierry
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reply other threads:[~2021-01-21 9:06 UTC|newest]
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