Patch "[PATCH 123/135] crypto: vmx - comply with ABIs that specify vrsave as" has been added to the 4.4-stable tree

Patch "[PATCH 123/135] crypto: vmx - comply with ABIs that specify vrsave as" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    [PATCH 123/135] crypto: vmx - comply with ABIs that specify vrsave as

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     0123-crypto-vmx-comply-with-ABIs-that-specify-vrsave-as-r.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 890c53b8667ad56511f5bf563db96003660d440f Mon Sep 17 00:00:00 2001
From: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com>
Date: Thu, 5 May 2016 11:09:27 -0300
Subject: [PATCH 123/135] 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>
---
 drivers/crypto/vmx/ppc-xlate.pl |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

--- 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) = @_;


Patches currently in stable-queue which might be from pfsmorigo@linux.vnet.ibm.com are

queue-4.4/0123-crypto-vmx-comply-with-ABIs-that-specify-vrsave-as-r.patch
queue-4.4/0126-crypto-vmx-IV-size-failing-on-skcipher-API.patch