[PATCH 5.5 085/367] powerpc/xmon: dont access ASDR in VMs

[Greg Kroah-Hartman]

From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxx>

commit c2a20711fc181e7f22ee5c16c28cb9578af84729 upstream.

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: d1e1b351f50f ("powerpc/xmon: Add ISA v3.0 SPRs to SPR dump")
Cc: stable@xxxxxxxxxxxxxxx # v4.14+
Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxx>
Reviewed-by: Andrew Donnellan <ajd@xxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200107021633.GB29843@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/powerpc/xmon/xmon.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -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
 }