diff mbox

crypto: vmx - comply with ABIs that specify vrsave as reserved.

Message ID 1461938585-7933-1-git-send-email-pfsmorigo@linux.vnet.ibm.com (mailing list archive)
State Superseded
Delegated to: Herbert Xu
Headers show

Commit Message

Paulo Flabiano Smorigo April 29, 2016, 2:03 p.m. UTC 
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>).
---
 drivers/crypto/vmx/ppc-xlate.pl | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

Comments

Herbert Xu May 3, 2016, 8:13 a.m. UTC | #1 
On Fri, Apr 29, 2016 at 11:03:05AM -0300, Paulo Flabiano Smorigo wrote:
> 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>).

No sign-off.
diff mbox

Patch

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) = @_;