From: Dave Martin <Dave.Martin@arm.com>
To: Julien Grall <julien.grall@arm.com>
Cc: Anton.Kirilov@arm.com, catalin.marinas@arm.com,
will.deacon@arm.com, oleg@redhat.com, zhang.lei@jp.fujitsu.com,
alex.bennee@linaro.org, linux-arm-kernel@lists.infradead.org,
Daniel.Kiss@arm.com
Subject: Re: [RFC PATCH v2 4/8] arm64/fpsimdmacros: Introduce a macro to update ZCR_EL1.LEN
Date: Fri, 21 Jun 2019 16:32:53 +0100 [thread overview]
Message-ID: <20190621153253.GZ2790@e103592.cambridge.arm.com> (raw)
In-Reply-To: <20190613161656.20765-5-julien.grall@arm.com>
On Thu, Jun 13, 2019 at 05:16:52PM +0100, Julien Grall wrote:
> A follow-up patch will need to update ZCR_EL1.LEN.
>
> Add a macro that could be re-used in the current and new places to
> avoid code duplication.
>
> Signed-off-by: Julien Grall <julien.grall@arm.com>
>
> ---
> Changes in v2:
> - Fix typo in the commit message
> ---
> arch/arm64/include/asm/fpsimdmacros.h | 19 ++++++++++++-------
> 1 file changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/arch/arm64/include/asm/fpsimdmacros.h b/arch/arm64/include/asm/fpsimdmacros.h
> index e2ab77dd9b4f..5e291d9c1ba0 100644
> --- a/arch/arm64/include/asm/fpsimdmacros.h
> +++ b/arch/arm64/include/asm/fpsimdmacros.h
> @@ -198,6 +198,17 @@
> .purgem _for__body
> .endm
>
> +/* Update ZCR_EL1.LEN with the new VQ */
> +.macro sve_load_vq xvqminus1, xtmp, xtmp2
> + mrs_s \xtmp, SYS_ZCR_EL1
> + bic \xtmp2, \xtmp, ZCR_ELx_LEN_MASK
> + orr \xtmp2, \xtmp2, \xvqminus1
> + cmp \xtmp2, \xtmp
> + b.eq 921f
> + msr_s SYS_ZCR_EL1, \xtmp2 //self-synchronising
> +921:
> +.endm
> +
> .macro sve_save nxbase, xpfpsr, nxtmp
> _for n, 0, 31, _sve_str_v \n, \nxbase, \n - 34
> _for n, 0, 15, _sve_str_p \n, \nxbase, \n - 16
> @@ -212,13 +223,7 @@
> .endm
>
> .macro sve_load nxbase, xpfpsr, xvqminus1, nxtmp, xtmp2
> - mrs_s x\nxtmp, SYS_ZCR_EL1
> - bic \xtmp2, x\nxtmp, ZCR_ELx_LEN_MASK
> - orr \xtmp2, \xtmp2, \xvqminus1
> - cmp \xtmp2, x\nxtmp
> - b.eq 921f
> - msr_s SYS_ZCR_EL1, \xtmp2 // self-synchronising
> -921:
> + sve_load_vq \xvqminus1, x\nxtmp, \xtmp2
> _for n, 0, 31, _sve_ldr_v \n, \nxbase, \n - 34
> _sve_ldr_p 0, \nxbase
> _sve_wrffr 0
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Cheers
---Dave
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-06-21 15:33 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-13 16:16 [RFC PATCH v2 0/8] arm64/sve: First steps towards optimizing syscalls Julien Grall
2019-06-13 16:16 ` [RFC PATCH v2 1/8] arm64/fpsimd: Update documentation of do_sve_acc Julien Grall
2019-06-13 16:19 ` Julien Grall
2019-06-21 15:32 ` Dave Martin
2019-06-13 16:16 ` [RFC PATCH v2 2/8] arm64/signal: Update the comment in preserve_sve_context Julien Grall
2019-06-21 15:32 ` Dave Martin
2019-06-13 16:16 ` [RFC PATCH v2 3/8] arm64/fpsimdmacros: Allow the macro "for" to be used in more cases Julien Grall
2019-06-21 15:32 ` Dave Martin
2019-06-24 16:10 ` Julien Grall
2019-06-25 9:35 ` Dave Martin
2019-06-13 16:16 ` [RFC PATCH v2 4/8] arm64/fpsimdmacros: Introduce a macro to update ZCR_EL1.LEN Julien Grall
2019-06-21 15:32 ` Dave Martin [this message]
2019-06-13 16:16 ` [RFC PATCH v2 5/8] arm64/sve: Implement an helper to flush SVE registers Julien Grall
2019-06-21 15:33 ` Dave Martin
2019-06-24 16:28 ` Julien Grall
2019-06-25 9:37 ` Dave Martin
2019-06-13 16:16 ` [RFC PATCH v2 6/8] arm64/sve: Implement an helper to load SVE registers from FPSIMD state Julien Grall
2019-06-21 15:33 ` Dave Martin
2019-06-24 16:29 ` Julien Grall
2019-06-13 16:16 ` [RFC PATCH v2 7/8] arm64/sve: Don't disable SVE on syscalls return Julien Grall
2019-06-21 15:33 ` Dave Martin
2019-06-24 16:44 ` Julien Grall
2019-06-25 9:41 ` Dave Martin
2019-07-04 14:15 ` Catalin Marinas
2019-08-02 11:06 ` Julien Grall
2019-06-13 16:16 ` [RFC PATCH v2 8/8] arm64/sve: Rework SVE trap access to use TIF_SVE_NEEDS_FLUSH Julien Grall
2019-06-21 15:33 ` Dave Martin
2019-06-21 15:32 ` [RFC PATCH v2 0/8] arm64/sve: First steps towards optimizing syscalls Dave Martin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190621153253.GZ2790@e103592.cambridge.arm.com \
--to=dave.martin@arm.com \
--cc=Anton.Kirilov@arm.com \
--cc=Daniel.Kiss@arm.com \
--cc=alex.bennee@linaro.org \
--cc=catalin.marinas@arm.com \
--cc=julien.grall@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=oleg@redhat.com \
--cc=will.deacon@arm.com \
--cc=zhang.lei@jp.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox