powerpc/xmon: don't access ASDR in VMs
flat view
From: Sukadev Bhattiprolu <hidden>
Date: 2020-01-07 02:18:25
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
From 91a77dbea3c909ff15c66cded37f1334304a293d Mon Sep 17 00:00:00 2001
From: Sukadev Bhattiprolu <redacted>
Date: Mon, 6 Jan 2020 13:50:02 -0600
Subject: [PATCH 1/1] 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.
Signed-off-by: Sukadev Bhattiprolu <redacted>
---
arch/powerpc/xmon/xmon.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 02fae453c2ec..b8d179b5cf4f 100644
--- 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 }
--
2.17.2