linux-kernel - Re: [PATCH RESEND] crypto: x86 - exit fpu context earlier in ECB/CBC macros

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Date:   Fri, 3 Feb 2023 13:03:10 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Peter Lafreniere <peter@...jl.ca>
Cc:     linux-crypto@...r.kernel.org, peter@...jl.ca, ardb@...nel.org,
        linux-kernel@...r.kernel.org, conor.dooley@...rochip.com,
        x86@...nel.org
Subject: Re: [PATCH RESEND] crypto: x86 - exit fpu context earlier in ECB/CBC
 macros

Peter Lafreniere <peter@...jl.ca> wrote:
> Currently the ecb/cbc macros hold fpu context unnecessarily when using
> scalar cipher routines (e.g. when handling odd sizes of blocks per walk).
> 
> Change the macros to drop fpu context as soon as the fpu is out of use.
> 
> No performance impact found (on Intel Haswell).
> 
> Signed-off-by: Peter Lafreniere <peter@...jl.ca>
> ---
> arch/x86/crypto/ecb_cbc_helpers.h | 19 +++++++++++++++----
> 1 file changed, 15 insertions(+), 4 deletions(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt