From e3f2f926dd9536bc800be78686aceadded9d83d3 Mon Sep 17 00:00:00 2001
From: Hari Bathini <hbathini@linux.ibm.com>
Date: Wed, 29 Jan 2020 01:04:48 +0530
Subject: [PATCH] powerpc: enable the scripts to capture dump on POWERNV
 platform

With FADump support added on POWERNV paltform, enable the scripts to
capture /proc/vmcore. Also, if CONFIG_OPAL_CORE is enabled, OPAL core
is preserved and exported on POWERNV platform. So, offload OPAL core,
if it is available.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Acked-by: Kairui Song <kasong@redhat.com>
---
 dracut-kdump.sh        | 31 +++++++++++++++++++++++++++++--
 kdump-lib-initramfs.sh | 26 ++++++++++++++++++++++++++
 kdumpctl               |  3 +++
 3 files changed, 58 insertions(+), 2 deletions(-)

diff --git a/dracut-kdump.sh b/dracut-kdump.sh
index 8add48d..0f54ddc 100755
--- a/dracut-kdump.sh
+++ b/dracut-kdump.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 
 # continue here only if we have to save dump.
-if [ -f /etc/fadump.initramfs ] && [ ! -f /proc/device-tree/rtas/ibm,kernel-dump ]; then
-	exit 0
+if [ -f /etc/fadump.initramfs ] && [ ! -f /proc/device-tree/rtas/ibm,kernel-dump ] && [ ! -f /proc/device-tree/ibm,opal/dump/mpipl-boot ]; then
+    exit 0
 fi
 
 exec &> /dev/console
@@ -81,6 +81,7 @@ dump_ssh()
     ssh -q $_opt $_host mkdir -p $_dir || return 1
 
     save_vmcore_dmesg_ssh ${DMESG_COLLECTOR} ${_dir} "${_opt}" $_host
+    save_opalcore_ssh ${_dir} "${_opt}" $_host
 
     echo "kdump: saving vmcore"
 
@@ -96,6 +97,32 @@ dump_ssh()
     return 0
 }
 
+save_opalcore_ssh() {
+    local _path=$1
+    local _opts="$2"
+    local _location=$3
+
+    if [ ! -f $OPALCORE ]; then
+        # Check if we are on an old kernel that uses a different path
+        if [ -f /sys/firmware/opal/core ]; then
+            OPALCORE="/sys/firmware/opal/core"
+        else
+            return 0
+        fi
+    fi
+
+    echo "kdump: saving opalcore"
+    scp $_opts $OPALCORE $_location:$_path/opalcore-incomplete
+    if [ $? -ne 0 ]; then
+        echo "kdump: saving opalcore failed"
+       return 1
+    fi
+
+    ssh $_opts $_location mv $_path/opalcore-incomplete $_path/opalcore
+    echo "kdump: saving opalcore complete"
+    return 0
+}
+
 save_vmcore_dmesg_ssh() {
     local _dmesg_collector=$1
     local _path=$2
diff --git a/kdump-lib-initramfs.sh b/kdump-lib-initramfs.sh
index d5d2ee2..a7c0bf9 100755
--- a/kdump-lib-initramfs.sh
+++ b/kdump-lib-initramfs.sh
@@ -18,6 +18,7 @@ KDUMP_CONF="/etc/kdump.conf"
 KDUMP_PRE=""
 KDUMP_POST=""
 NEWROOT="/sysroot"
+OPALCORE="/sys/firmware/opal/mpipl/core"
 
 get_kdump_confs()
 {
@@ -137,6 +138,7 @@ dump_fs()
     mkdir -p $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR || return 1
 
     save_vmcore_dmesg_fs ${DMESG_COLLECTOR} "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/"
+    save_opalcore_fs "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/"
 
     echo "kdump: saving vmcore"
     $CORE_COLLECTOR /proc/vmcore $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete || return 1
@@ -173,6 +175,30 @@ save_vmcore_dmesg_fs() {
     fi
 }
 
+save_opalcore_fs() {
+    local _path=$1
+
+    if [ ! -f $OPALCORE ]; then
+        # Check if we are on an old kernel that uses a different path
+        if [ -f /sys/firmware/opal/core ]; then
+            OPALCORE="/sys/firmware/opal/core"
+        else
+            return 0
+        fi
+    fi
+
+    echo "kdump: saving opalcore"
+    cp $OPALCORE ${_path}/opalcore
+    if [ $? -ne 0 ]; then
+        echo "kdump: saving opalcore failed"
+        return 1
+    fi
+
+    sync
+    echo "kdump: saving opalcore complete"
+    return 0
+}
+
 dump_to_rootfs()
 {
 
diff --git a/kdumpctl b/kdumpctl
index 97fe541..88128a3 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -250,6 +250,9 @@ check_config()
 				echo "Invalid kdump config value for option $config_opt."
 				return 1;
 			}
+			if [ -d "/proc/device-tree/ibm,opal/dump" ] && [ "$config_opt" == "raw" ]; then
+				echo "WARNING: Won't capture opalcore when 'raw' dump target is used."
+			fi
 			;;
 		net|options|link_delay|disk_timeout|debug_mem_level|blacklist)
 			echo "Deprecated kdump config option: $config_opt. Refer to kdump.conf manpage for alternatives."