From: Segher Boessenkool <segher@kernel.crashing.org>
To: Rohan McLure <rmclure@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, npiggin@gmail.com
Subject: Re: [PATCH v2 11/14] powerpc/64s: Clear/restore caller gprs in syscall interrupt/return
Date: Thu, 11 Aug 2022 10:13:02 -0500 [thread overview]
Message-ID: <20220811151302.GF25951@gate.crashing.org> (raw)
In-Reply-To: <20220725063111.120926-1-rmclure@linux.ibm.com>
Hi!
On Mon, Jul 25, 2022 at 04:31:11PM +1000, Rohan McLure wrote:
> + /*
> + * Zero user registers to prevent influencing speculative execution
> + * state of kernel code.
> + */
> + NULLIFY_GPRS(5, 12)
> + NULLIFY_NVGPRS()
"Nullify" means "invalidate", which is not what this does or is for :-(
Segher
next prev parent reply other threads:[~2022-08-11 15:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-25 6:31 [PATCH v2 11/14] powerpc/64s: Clear/restore caller gprs in syscall interrupt/return Rohan McLure
2022-08-11 10:11 ` Andrew Donnellan
2022-08-15 0:29 ` Rohan McLure
2022-08-11 15:13 ` Segher Boessenkool [this message]
2022-08-11 15:39 ` Christophe Leroy
2022-08-11 15:47 ` Segher Boessenkool
2022-08-14 23:59 ` Rohan McLure
2022-08-19 6:22 ` Christophe Leroy
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