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authorPaulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com>2016-05-05 11:09:27 -0300
committerHerbert Xu <herbert@gondor.apana.org.au>2016-05-10 17:49:21 +0800
commit5ca55738201c7ae1b556ad87bbb22c139ecc01dd (patch)
tree4d5aae650e136c0a42476f53d69fa380950c1b65 /drivers/crypto
parent9e5c9fe4cbb89b9af1fcf317f7b39d993bb47a71 (diff)
downloadlinux-5ca55738201c7ae1b556ad87bbb22c139ecc01dd.tar.bz2
crypto: vmx - comply with ABIs that specify vrsave as reserved.
It gives significant improvements ( ~+15%) on some modes. These code has been adopted from OpenSSL project in collaboration with the original author (Andy Polyakov <appro@openssl.org>). Signed-off-by: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/vmx/ppc-xlate.pl20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/crypto/vmx/ppc-xlate.pl b/drivers/crypto/vmx/ppc-xlate.pl
index b9997335f193..9f4994cabcc7 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) = @_;