Commit c2a20711 authored by Sukadev Bhattiprolu's avatar Sukadev Bhattiprolu Committed by Michael Ellerman
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powerpc/xmon: don't access ASDR in VMs 



ASDR is HV-privileged and must only be accessed in HV-mode.
Fixes a Program Check (0x700) when xmon in a VM dumps SPRs.

Fixes: d1e1b351 ("powerpc/xmon: Add ISA v3.0 SPRs to SPR dump")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: default avatarSukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: default avatarAndrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200107021633.GB29843@us.ibm.com
parent eeb09917

arch/powerpc/xmon/xmon.c

+4 −5
Original line number Diff line number Diff line
@@ -1949,15 +1949,14 @@ static void dump_300_sprs(void) 


	printf("pidr   = %.16lx  tidr  = %.16lx\n",

		mfspr(SPRN_PID), mfspr(SPRN_TIDR));

	printf("asdr   = %.16lx  psscr = %.16lx\n",

		mfspr(SPRN_ASDR), hv ? mfspr(SPRN_PSSCR)

					: mfspr(SPRN_PSSCR_PR));

	printf("psscr  = %.16lx\n",

		hv ? mfspr(SPRN_PSSCR) : mfspr(SPRN_PSSCR_PR));



	if (!hv)

		return;



	printf("ptcr   = %.16lx\n",

		mfspr(SPRN_PTCR));

	printf("ptcr   = %.16lx  asdr  = %.16lx\n",

		mfspr(SPRN_PTCR), mfspr(SPRN_ASDR));

#endif

}