Commit c3e0dbd7 authored Aug 14, 2019 by Cédric Le Goater Committed by Michael Ellerman Aug 19, 2019

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

parent 201ed7f3

arch/powerpc/xmon/xmon.c

+10 −7

Original line number	Diff line number	Diff line
		@@ -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);

		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;

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