linux-kernel - [PATCH v3 2/7] powerpc: Add PVR & CPU name to dump stack arch description

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Message-Id: <20190207124635.3885-2-mpe@ellerman.id.au>
Date:   Thu,  7 Feb 2019 23:46:30 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     linuxppc-dev@...abs.org
Cc:     akpm@...ux-foundation.org, tj@...nel.org,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        dyoung@...hat.com, sergey.senozhatsky@...il.com, pmladek@...e.com
Subject: [PATCH v3 2/7] powerpc: Add PVR & CPU name to dump stack arch description

As soon as we've done some basic setup, add the PVR and CPU name to
the dump stack arch description, which is printed in case of an oops.

eg: Hardware name: ... POWER8E (raw) pvr:0x4b0201

Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
---
 arch/powerpc/kernel/cputable.c | 1 +
 arch/powerpc/kernel/prom.c     | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 1eab54bc6ee9..8b4520a84612 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/export.h>
 #include <linux/jump_label.h>
+#include <linux/printk.h>
 
 #include <asm/oprofile_impl.h>
 #include <asm/cputable.h>
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 4181ec715f88..ea2c3498067d 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -761,6 +761,10 @@ void __init early_init_devtree(void *params)
 
 	dt_cpu_ftrs_scan();
 
+	/* We can now set the CPU name & PVR for the oops output */
+	dump_stack_add_arch_desc("%s pvr:0x%04lx", cur_cpu_spec->cpu_name,
+				 mfspr(SPRN_PVR));
+
 	/* Retrieve CPU related informations from the flat tree
 	 * (altivec support, boot CPU ID, ...)
 	 */
-- 
2.20.1