linux-kernel - [PATCH] x86/quark: Run IMR self-test on IMR capble hw only

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Message-Id: <1427800536-32339-1-git-send-email-pure.logic@nexus-software.ie>
Date:	Tue, 31 Mar 2015 12:15:36 +0100
From:	Bryan O'Donoghue <pure.logic@...us-software.ie>
To:	pure.logic@...us-software.ie, mingo@...hat.com, tglx@...utronix.de,
	hpa@...or.com, x86@...nel.org, ying.huang@...el.com,
	huang.ying.caritas@...il.com, andriy.shevchenko@...el.com,
	boon.leong.ong@...el.com, dvhart@...ux.intel.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH] x86/quark: Run IMR self-test on IMR capble hw only

Automated testing with LKP shows IMR self test code running and printing
error messages on QEMU hardware lacking IMR support.

Update IMR self-test code to run only when IMR hardware should be present.
Tested on Quark X1000 and QEMU.

Signed-off-by: Bryan O'Donoghue <pure.logic@...us-software.ie>
---
 arch/x86/platform/intel-quark/imr_selftest.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/x86/platform/intel-quark/imr_selftest.c b/arch/x86/platform/intel-quark/imr_selftest.c
index c9a0838..5e6c055 100644
--- a/arch/x86/platform/intel-quark/imr_selftest.c
+++ b/arch/x86/platform/intel-quark/imr_selftest.c
@@ -11,6 +11,7 @@
  */
 
 #include <asm-generic/sections.h>
+#include <asm/cpu_device_id.h>
 #include <asm/imr.h>
 #include <linux/init.h>
 #include <linux/mm.h>
@@ -101,6 +102,13 @@ static void __init imr_self_test(void)
 	}
 }
 
+static const struct x86_cpu_id imr_ids[] __initconst = {
+	{ X86_VENDOR_INTEL, 5, 9 },	/* Intel Quark SoC X1000. */
+	{}
+};
+MODULE_DEVICE_TABLE(x86cpu, imr_ids);
+
+
 /**
  * imr_self_test_init - entry point for IMR driver.
  *
@@ -108,7 +116,8 @@ static void __init imr_self_test(void)
  */
 static int __init imr_self_test_init(void)
 {
-	imr_self_test();
+	if (x86_match_cpu(imr_ids))
+		imr_self_test();
 	return 0;
 }
 
-- 
1.9.1

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