From: byan@nvidia.com (Bo Yan)
To: linux-arm-kernel@lists.infradead.org
Subject: a question about run-time patching for heterogeneous cores.
Date: Mon, 30 Mar 2015 19:18:42 -0700 [thread overview]
Message-ID: <551A0402.90903@nvidia.com> (raw)
The current code for arm64 run-time patching works fine if all CPUs are
the same, but doesn't seem to handle the case when CPUs are of different
type. For example, when you have a mix of A53 and A57 cores, currently
the errata WARs can be applied irrespective of A53 or A57 since the code
in need of patching are shared.
It doesn't look like the current WARs will cause functional problems
across different CPU cores. On the other hand, is there a perf issue due
to the same errata WARs being applied to different cores?
Thanks
Bo
next reply other threads:[~2015-03-31 2:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-31 2:18 Bo Yan [this message]
2015-03-31 10:51 ` a question about run-time patching for heterogeneous cores Mark Rutland
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