On Wed, Mar 03, 2021 at 02:16:04AM +0100, Maciej W. Rozycki wrote:
> The MIPS Poly1305 implementation is generic MIPS code written such as to
> support down to the original MIPS I and MIPS III ISA for the 32-bit and
> 64-bit variant respectively. Lift the current limitation then to enable
> code for MIPSr1 ISA or newer processors only and have it available for
> all MIPS processors.
>
> Signed-off-by: Maciej W. Rozycki <macro@xxxxxxxxxxx>
> Fixes: a11d055e7a64 ("crypto: mips/poly1305 - incorporate OpenSSL/CRYPTOGAMS optimized implementation")
> Cc: stable@xxxxxxxxxxxxxxx # v5.5+
> ---
> On Wed, 3 Mar 2021, Jason A. Donenfeld wrote:
>
> > >> Would you mind sending this for 5.12 in an rc at some point, rather
> > >> than waiting for 5.13? I'd like to see this backported to 5.10 and 5.4
> > >> for OpenWRT.
> > >
> > > why is this so important for OpenWRT ? Just to select CRYPTO_POLY1305_MIPS
> > > ?
> >
> > Yes. The performance boost on Octeon is significant for WireGuard users.
>
> But that's the wrong fix for that purpose. I've skimmed over that module
> and there's nothing MIPS64-specific there. In fact it's plain generic
> MIPS assembly, with some R2 optimisations enabled where applicable but not
> necessary (and then R6 tweaks, but that's irrelevant here).
>
> As a matter of interest I have just built it successfully for a MIPS I
> DECstation configuration:
>
> $ file arch/mips/crypto/poly1305-mips.ko
> arch/mips/crypto/poly1305-mips.ko: ELF 32-bit LSB relocatable, MIPS, MIPS-I version 1 (SYSV), BuildID[sha1]=d36384d94f60ba7deff638ca8a24500120b45b56, not stripped
> $
>
> Patch included, please apply.
>
> So while your change is surely right, what you want is this really.
>
> Maciej
> ---
> arch/mips/crypto/Makefile | 4 ++--
> crypto/Kconfig | 2 +-
> drivers/net/Kconfig | 2 +-
> 3 files changed, 4 insertions(+), 4 deletions(-)
applied to mips-fixes.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
