linux-kernel - [v7 02/10] arm64: add sysfs vulnerability show for spectre v1

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Message-Id: <20190410231237.52506-3-jeremy.linton@arm.com>
Date:   Wed, 10 Apr 2019 18:12:29 -0500
From:   Jeremy Linton <jeremy.linton@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     catalin.marinas@....com, will.deacon@....com, marc.zyngier@....com,
        suzuki.poulose@....com, Dave.Martin@....com,
        shankerd@...eaurora.org, julien.thierry@....com,
        mlangsdo@...hat.com, stefan.wahren@...e.com,
        Andre.Przywara@....com, linux-kernel@...r.kernel.org,
        Mian Yousaf Kaukab <ykaukab@...e.de>,
        Jeremy Linton <jeremy.linton@....com>,
        Andre Przywara <andre.przywara@....com>
Subject: [v7 02/10] arm64: add sysfs vulnerability show for spectre v1

From: Mian Yousaf Kaukab <ykaukab@...e.de>

spectre v1, has been mitigated, and the mitigation is
always active.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@...e.de>
Signed-off-by: Jeremy Linton <jeremy.linton@....com>
Reviewed-by: Andre Przywara <andre.przywara@....com>
Reviewed-by: Catalin Marinas <catalin.marinas@....com>
Tested-by: Stefan Wahren <stefan.wahren@...e.com>
Acked-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 arch/arm64/kernel/cpu_errata.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index d2b2c69d31bb..cf623657cf3c 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -755,3 +755,9 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 	{
 	}
 };
+
+ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	return sprintf(buf, "Mitigation: __user pointer sanitization\n");
+}
-- 
2.20.1