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Breno Leitao 9cd0192298 powerpc/xmon: Check before calling xive functions 
[ Upstream commit 402e172a2ce76210f2fe921cf419d12103851344 ]

Currently xmon could call XIVE functions from OPAL even if the XIVE is
disabled or does not exist in the system, as in POWER8 machines. This
causes the following exception:

 1:mon> dx
 cpu 0x1: Vector: 700 (Program Check) at [c000000423c93450]
     pc: c00000000009cfa4: opal_xive_dump+0x50/0x68
     lr: c0000000000997b8: opal_return+0x0/0x50

This patch simply checks if XIVE is enabled before calling XIVE
functions.

Fixes: 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE interrupt controller")
Suggested-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-20 10:10:34 +01:00
..
alpha
License cleanup: add SPDX license identifiers to some files
2017-11-02 10:04:46 -07:00
arc
License cleanup: add SPDX license identifiers to some files
2017-11-02 10:04:46 -07:00
arm
ARM: avoid faulting on qemu
2017-12-14 09:53:05 +01:00
arm64
ARM64: dts: meson-gxbb-odroidc2: fix usb1 power supply
2017-12-20 10:10:30 +01:00
blackfin
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
c6x
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
cris
License cleanup: add SPDX license identifier to uapi header files with no license
2017-11-02 11:19:54 +01:00
frv
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
h8300
License cleanup: add SPDX license identifier to uapi header files with no license
2017-11-02 11:19:54 +01:00
hexagon
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
ia64
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-05 12:14:50 -08:00
m32r
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
m68k
m68k: fix ColdFire node shift size calculation
2017-12-10 13:40:39 +01:00
metag
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
microblaze
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
mips
fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
2017-12-17 15:07:59 +01:00
mn10300
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
nios2
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
openrisc
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
parisc
fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
2017-12-17 15:07:59 +01:00
powerpc
powerpc/xmon: Check before calling xive functions
2017-12-20 10:10:34 +01:00
s390
kernel: make groups_sort calling a responsibility group_info allocators
2017-12-20 10:10:18 +01:00
score
License cleanup: add SPDX license identifier to uapi header files with no license
2017-11-02 11:19:54 +01:00
sh
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
sparc
fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
2017-12-17 15:07:59 +01:00
tile
fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
2017-12-17 15:07:59 +01:00
um
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
unicore32
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
x86
x86/boot/compressed/64: Print error if 5-level paging is not supported
2017-12-20 10:10:21 +01:00
xtensa
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
.gitignore
…
Kconfig
kprobes: Use synchronize_rcu_tasks() for optprobe with CONFIG_PREEMPT=y
2017-12-10 13:40:40 +01:00