Patch "powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call" has been added to the 4.4-stable tree

Patch "powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call" 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

    powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call

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:
     powerpc-pseries-add-power8nvl-support-to-ibm-client-architecture-support-call.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 7cc851039d643a2ee7df4d18177150f2c3a484f5 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Tue, 31 May 2016 07:51:17 +0200
Subject: powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call

From: Thomas Huth <thuth@redhat.com>

commit 7cc851039d643a2ee7df4d18177150f2c3a484f5 upstream.

If we do not provide the PVR for POWER8NVL, a guest on this system
currently ends up in PowerISA 2.06 compatibility mode on KVM, since QEMU
does not provide a generic PowerISA 2.07 mode yet. So some new
instructions from POWER8 (like "mtvsrd") get disabled for the guest,
resulting in crashes when using code compiled explicitly for
POWER8 (e.g. with the "-mcpu=power8" option of GCC).

Fixes: ddee09c099c3 ("powerpc: Add PVR for POWER8NVL processor")
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/kernel/prom_init.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -655,6 +655,7 @@ unsigned char ibm_architecture_vec[] = {
 	W(0xffff0000), W(0x003e0000),	/* POWER6 */
 	W(0xffff0000), W(0x003f0000),	/* POWER7 */
 	W(0xffff0000), W(0x004b0000),	/* POWER8E */
+	W(0xffff0000), W(0x004c0000),   /* POWER8NVL */
 	W(0xffff0000), W(0x004d0000),	/* POWER8 */
 	W(0xffffffff), W(0x0f000004),	/* all 2.07-compliant */
 	W(0xffffffff), W(0x0f000003),	/* all 2.06-compliant */


Patches currently in stable-queue which might be from thuth@redhat.com are

queue-4.4/powerpc-fix-definition-of-siar-and-sdar-registers.patch
queue-4.4/powerpc-use-privileged-spr-number-for-mmcr2.patch
queue-4.4/powerpc-pseries-add-power8nvl-support-to-ibm-client-architecture-support-call.patch