From: Cédric Le Goater <clg@xxxxxxxx> [ Upstream commit c3e0dbd7f780a58c4695f1cd8fc8afde80376737 ] 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@xxxxxxxx> Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20190814154754.23682-2-clg@xxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- arch/powerpc/xmon/xmon.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 6b9038a3e79f0..5a739588aa505 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -2438,13 +2438,16 @@ 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; -- 2.20.1
