From: Dave Martin <Dave.Martin@arm.com>
To: Mark Brown <broonie@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 2/3] arm64/sve: Use the sve_flush macros in sve_load_from_fpsimd_state()
Date: Wed, 12 May 2021 14:40:42 +0100 [thread overview]
Message-ID: <20210512134042.GE4187@arm.com> (raw)
In-Reply-To: <20210511160446.42871-3-broonie@kernel.org>
On Tue, May 11, 2021 at 05:04:45PM +0100, Mark Brown wrote:
> This makes the code a bit clearer and as a result we can also make the
> indentation more normal, there is no change to the generated code.
>
> Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
> ---
> arch/arm64/kernel/entry-fpsimd.S | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm64/kernel/entry-fpsimd.S b/arch/arm64/kernel/entry-fpsimd.S
> index 7921d58427c2..dd8382e5ce82 100644
> --- a/arch/arm64/kernel/entry-fpsimd.S
> +++ b/arch/arm64/kernel/entry-fpsimd.S
> @@ -63,11 +63,10 @@ SYM_FUNC_END(sve_set_vq)
> * and the rest zeroed. All the other SVE registers will be zeroed.
> */
> SYM_FUNC_START(sve_load_from_fpsimd_state)
> - sve_load_vq x1, x2, x3
> - fpsimd_restore x0, 8
> - _for n, 0, 15, _sve_pfalse \n
> - _sve_wrffr 0
> - ret
> + sve_load_vq x1, x2, x3
> + fpsimd_restore x0, 8
> + sve_flush_p_ffr
> + ret
> SYM_FUNC_END(sve_load_from_fpsimd_state)
>
> /* Zero all SVE registers but the first 128-bits of each vector */
> --
> 2.20.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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next prev parent reply other threads:[~2021-05-12 13:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 16:04 [PATCH v2 0/3] arm64/sve: Trivial optimisation for 128 bit SVE vectors Mark Brown
2021-05-11 16:04 ` [PATCH v2 1/3] arm64/sve: Split _sve_flush macro into separate Z and predicate flushes Mark Brown
2021-05-12 13:40 ` Dave Martin
2021-05-11 16:04 ` [PATCH v2 2/3] arm64/sve: Use the sve_flush macros in sve_load_from_fpsimd_state() Mark Brown
2021-05-12 13:40 ` Dave Martin [this message]
2021-05-11 16:04 ` [PATCH v2 3/3] arm64/sve: Skip flushing Z registers with 128 bit vectors Mark Brown
2021-05-12 13:49 ` Dave Martin
2021-05-12 14:22 ` Mark Brown
2021-05-12 16:16 ` [PATCH v2 0/3] arm64/sve: Trivial optimisation for 128 bit SVE vectors Catalin Marinas
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