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Message-Id: <b3ca67442a924acb9f4a3409264914ca9feaf7d5.1538148840.git.christophe.leroy@c-s.fr>
From:   Christophe Leroy <christophe.leroy@c-s.fr>
Subject: [PATCH v3] powerpc: wire up memtest
To:     Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Jonathan Corbet <corbet@lwn.net>
Cc:     linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        linux-doc@vger.kernel.org
Date:   Fri, 28 Sep 2018 15:39:20 +0000 (UTC)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add call to early_memtest() so that kernel compiled with
CONFIG_MEMTEST really perform memtest at startup when requested
via 'memtest' boot parameter.

Tested-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 v3: updated kernel parameters documentation to mention PPC

 v2: moved the test after initmem_init() as PPC64 sets max_low_pfn later than PPC32.

 Documentation/admin-guide/kernel-parameters.txt | 2 +-
 arch/powerpc/kernel/setup-common.c              | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 92eb1f42240d..a5ad67d5cb16 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2404,7 +2404,7 @@
 			seconds.  Use this parameter to check at some
 			other rate.  0 disables periodic checking.
 
-	memtest=	[KNL,X86,ARM] Enable memtest
+	memtest=	[KNL,X86,ARM,PPC] Enable memtest
 			Format: <integer>
 			default : 0 <disable>
 			Specifies the number of memtest passes to be
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 93fa0c99681e..9ca9db707bcb 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -33,6 +33,7 @@
 #include <linux/serial_8250.h>
 #include <linux/percpu.h>
 #include <linux/memblock.h>
+#include <linux/bootmem.h>
 #include <linux/of_platform.h>
 #include <linux/hugetlb.h>
 #include <asm/debugfs.h>
@@ -966,6 +967,8 @@ void __init setup_arch(char **cmdline_p)
 
 	initmem_init();
 
+	early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT);
+
 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
 #endif
-- 
2.13.3