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Message-ID: <87y1ie1yp2.fsf@all.your.base.are.belong.to.us>
Date: Sun, 13 Aug 2023 22:20:41 +0200
From: Björn Töpel <bjorn@...nel.org>
To: Puranjay Mohan <puranjay12@...il.com>, paul.walmsley@...ive.com,
palmer@...belt.com, aou@...s.berkeley.edu, pulehui@...wei.com,
conor.dooley@...rochip.com, ast@...nel.org, daniel@...earbox.net,
andrii@...nel.org, martin.lau@...ux.dev, song@...nel.org,
yhs@...com, kpsingh@...nel.org, bpf@...r.kernel.org,
linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: puranjay12@...il.com
Subject: Re: [PATCH bpf-next 1/2] riscv: Extend patch_text_nosync() for
multiple pages
Puranjay Mohan <puranjay12@...il.com> writes:
> The patch_insn_write() function currently doesn't work for multiple
> pages of instructions, therefore patch_text_nosync() will fail with a
> page fault if called with lengths spanning multiple pages.
>
> This commit extends the patch_insn_write() function to support multiple
> pages by copying at max 2 pages at a time in a loop. This implementation
> is similar to text_poke_copy() function of x86.
>
> Signed-off-by: Puranjay Mohan <puranjay12@...il.com>
Reviewed-by: Björn Töpel <bjorn@...osinc.com>
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