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Tue, 7 Jan 2020 02:16:35 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 25E37BE04F; Tue, 7 Jan 2020 02:16:35 +0000 (GMT) Received: from suka-w540.localdomain (unknown [9.70.94.45]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 7 Jan 2020 02:16:35 +0000 (GMT) Received: by suka-w540.localdomain (Postfix, from userid 1000) id 83A6C2E0EE6; Mon, 6 Jan 2020 18:16:33 -0800 (PST) Date: Mon, 6 Jan 2020 18:16:33 -0800 From: Sukadev Bhattiprolu To: Michael Ellerman Subject: powerpc/xmon: don't access ASDR in VMs Message-ID: <20200107021633.GB29843@us.ibm.com> MIME-Version: 1.0 Content-Disposition: inline X-Operating-System: Linux 2.0.32 on an i486 User-Agent: Mutt/1.10.1 (2018-07-13) X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95, 18.0.572 definitions=2020-01-06_08:2020-01-06, 2020-01-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 mlxscore=0 clxscore=1015 phishscore=0 spamscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 adultscore=0 mlxlogscore=820 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001070016 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From 91a77dbea3c909ff15c66cded37f1334304a293d Mon Sep 17 00:00:00 2001 From: Sukadev Bhattiprolu 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 Reviewed-by: Andrew Donnellan --- 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 }