From: Andreas Schwab <schwab@suse.de>
To: Song Shuai <songshuaishuai@tinylab.org>
Cc: paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu, mick@ics.forth.gr, alex@ghiti.fr,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] riscv: kexec: Cleanup riscv_kexec_relocate
Date: Wed, 30 Aug 2023 09:24:33 +0200 [thread overview]
Message-ID: <mvmmsy956xa.fsf@suse.de> (raw)
In-Reply-To: <20230830063435.1105726-1-songshuaishuai@tinylab.org> (Song Shuai's message of "Wed, 30 Aug 2023 14:34:35 +0800")
On Aug 30 2023, Song Shuai wrote:
> @@ -52,21 +42,27 @@ SYM_CODE_START(riscv_kexec_relocate)
> * the start of the loop below so that we jump there in
> * any case.
> */
> - la s8, 1f
> - sub s8, s8, s7
> - csrw CSR_STVEC, s8
> + la s6, 1f
> + sub s6, s6, s4
> + csrw CSR_STVEC, s6
> +
> + /*
> + * With C-extension, here we get 42 Bytes and the next
> + * .align directive would pad zeros here up to 44 Bytes.
> + * So manually put a nop here to avoid zeros padding.
> + */
> + nop
>
> /* Process entries in a loop */
> .align 2
While you are at it, I'd suggest being explicit about .palign
vs. .balign.
--
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
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next prev parent reply other threads:[~2023-08-30 7:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-30 6:34 [PATCH] riscv: kexec: Cleanup riscv_kexec_relocate Song Shuai
2023-08-30 7:24 ` Andreas Schwab [this message]
2023-08-31 6:55 ` Song Shuai
2023-08-31 7:38 ` Andreas Schwab
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