Patch "powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call" has been added to the 4.4-stable tree
Subsystems (2)
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 <[email protected]> know about it.
Quoted 1 line
From
7cc851039d643a2ee7df4d18177150f2c3a484f5Mon Sep 17 00:00:00 2001
From: Thomas Huth <[email protected]>
Date: Tue, 31 May 2016 07:51:17 +0200
Subject: powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call
From: Thomas Huth <[email protected]>
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).
--- arch/powerpc/kernel/prom_init.c | 1 + 1 file changed, 1 insertion(+)
arch/powerpc/kernel/prom_init.c +1 -0
@@ -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 [email protected] 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