diff options
| author | Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com> | 2016-05-05 11:09:27 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-15 08:27:48 +0200 |
| commit | e29e85ac08345e9276bff3ca39debc88a46d79a4 (patch) | |
| tree | 347d326d4eecf1290ace904a6d74941931843d44 /drivers/crypto/vmx | |
| parent | 5349cdd3b49cea2d57dc05bbf3f313979751fed3 (diff) | |
crypto: vmx - comply with ABIs that specify vrsave as reserved.
[ Upstream commit 5ca55738201c7ae1b556ad87bbb22c139ecc01dd ]
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/crypto/vmx')
| -rw-r--r-- | drivers/crypto/vmx/ppc-xlate.pl | 20 |
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) = @_; |