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@xxxxxxxxxxxxxxx> know about it.
>From 890c53b8667ad56511f5bf563db96003660d440f Mon Sep 17 00:00:00 2001
From: Paulo Flabiano Smorigo <pfsmorigo@xxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxx>).
Signed-off-by: Paulo Flabiano Smorigo <pfsmorigo@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxxxxxxxx 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
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