From: Paulo Flabiano Smorigo Subject: [PATCH] crypto: vmx - comply with ABIs that specify vrsave as reserved. Date: Fri, 29 Apr 2016 11:03:05 -0300 Message-ID: <1461938585-7933-1-git-send-email-pfsmorigo@linux.vnet.ibm.com> Cc: Paulo Flabiano Smorigo , "Leonidas S. Barbosa" , Herbert Xu , "David S. Miller" , linux-crypto@vger.kernel.org (open list:IBM Power VMX Cryptographic instructions) To: linux-kernel@vger.kernel.org Return-path: Received: from e24smtp03.br.ibm.com ([32.104.18.24]:57868 "EHLO e24smtp03.br.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753230AbcD2OMT (ORCPT ); Fri, 29 Apr 2016 10:12:19 -0400 Received: from localhost by e24smtp03.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 29 Apr 2016 11:12:16 -0300 Sender: linux-crypto-owner@vger.kernel.org List-ID: It gives significant improvements ( ~+15%) on some modes. These code has been adopted from OpenSSL project in collaboration with the original author (Andy Polyakov ). --- drivers/crypto/vmx/ppc-xlate.pl | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/crypto/vmx/ppc-xlate.pl b/drivers/crypto/vmx/ppc-xlate.pl index b999733..9f4994c 100644 --- a/drivers/crypto/vmx/ppc-xlate.pl +++ b/drivers/crypto/vmx/ppc-xlate.pl @@ -139,6 +139,26 @@ my $vmr = sub { " vor $vx,$vy,$vy"; }; +# Some ABIs specify vrsave, special-purpose register #256, as reserved +# for system use. +my $no_vrsave = ($flavour =~ /aix|linux64le/); +my $mtspr = sub { + my ($f,$idx,$ra) = @_; + if ($idx == 256 && $no_vrsave) { + " or $ra,$ra,$ra"; + } else { + " mtspr $idx,$ra"; + } +}; +my $mfspr = sub { + my ($f,$rd,$idx) = @_; + if ($idx == 256 && $no_vrsave) { + " li $rd,-1"; + } else { + " mfspr $rd,$idx"; + } +}; + # PowerISA 2.06 stuff sub vsxmem_op { my ($f, $vrt, $ra, $rb, $op) = @_; -- 2.5.0