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powerpc/xmon: Check for HV mode when dumping XIVE info from OPAL 

Currently, the xmon 'dx' command calls OPAL to dump the XIVE state in
the OPAL logs and also outputs some of the fields of the internal XIVE
structures in Linux. The OPAL calls can only be done on baremetal
(PowerNV) and they crash a pseries machine. Fix by checking the
hypervisor feature of the CPU.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190814154754.23682-2-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2019-08-14 17:47:52 +02:00 committed by Michael Ellerman
parent 201ed7f327
commit c3e0dbd7f7
1 changed files with 9 additions and 6 deletions
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15
arch/powerpc/xmon/xmon.c
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@ -2534,13 +2534,16 @@ static void dump_pacas(void)
static void dump_one_xive(int cpu)
{
unsigned int hwid = get_hard_smp_processor_id(cpu);
bool hv = cpu_has_feature(CPU_FTR_HVMODE);
opal_xive_dump(XIVE_DUMP_TM_HYP, hwid);
opal_xive_dump(XIVE_DUMP_TM_POOL, hwid);
opal_xive_dump(XIVE_DUMP_TM_OS, hwid);
opal_xive_dump(XIVE_DUMP_TM_USER, hwid);
opal_xive_dump(XIVE_DUMP_VP, hwid);
opal_xive_dump(XIVE_DUMP_EMU_STATE, hwid);
if (hv) {
opal_xive_dump(XIVE_DUMP_TM_HYP, hwid);
opal_xive_dump(XIVE_DUMP_TM_POOL, hwid);
opal_xive_dump(XIVE_DUMP_TM_OS, hwid);
opal_xive_dump(XIVE_DUMP_TM_USER, hwid);
opal_xive_dump(XIVE_DUMP_VP, hwid);
opal_xive_dump(XIVE_DUMP_EMU_STATE, hwid);
}
if (setjmp(bus_error_jmp) != 0) {
catch_memory_errors = 0;