FAILED: patch "[PATCH] s390/cpumf: Fix lpp detection" failed to apply to 4.4-stable tree
Subsystems (2)
[email protected]
maintainerThe patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
Quoted 1 line
From
7a76aa95f6f6682db5629449d763251d1c9f8c4eMon Sep 17 00:00:00 2001
From: Christian Borntraeger <[email protected]>
Date: Mon, 29 Feb 2016 15:59:18 +0100
Subject: [PATCH] s390/cpumf: Fix lpp detection
we have to check bit 40 of the facility list before issuing LPP and not bit 48. Otherwise a guest running on a system with "The decimal-floating-point zoned-conversion facility" and without the "The set-program-parameters facility" might crash on an lpp instruction.
arch/s390/kernel/head64.S +1 -1
@@ -16,7 +16,7 @@ __HEAD ENTRY(startup_continue) - tm __LC_STFLE_FAC_LIST+6,0x80 # LPP available ? + tm __LC_STFLE_FAC_LIST+5,0x80 # LPP available ? jz 0f xc __LC_LPP+1(7,0),__LC_LPP+1 # clear lpp and current_pid mvi __LC_LPP,0x80 # and set LPP_MAGIC