diff options
| author | Breno Leitao <leitao@debian.org> | 2017-10-17 16:20:18 -0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-10-22 12:08:31 +0200 |
| commit | 402e172a2ce76210f2fe921cf419d12103851344 (patch) | |
| tree | f441068833c65225faa134006b5a45053b77eda0 /arch/powerpc/xmon/xmon.c | |
| parent | 1cafc629408d1883a00c9f656e3de5a677460a88 (diff) | |
| download | blackbird-obmc-linux-402e172a2ce76210f2fe921cf419d12103851344.tar.gz blackbird-obmc-linux-402e172a2ce76210f2fe921cf419d12103851344.zip | |
powerpc/xmon: Check before calling xive functions
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>
Diffstat (limited to 'arch/powerpc/xmon/xmon.c')
| -rw-r--r-- | arch/powerpc/xmon/xmon.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 4679aeb84767..2e2320edb96b 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -2508,6 +2508,11 @@ static void dump_xives(void) unsigned long num; int c; + if (!xive_enabled()) { + printf("Xive disabled on this system\n"); + return; + } + c = inchar(); if (c == 'a') { dump_all_xives(); |
