From: Jeremy Linton <jeremy.linton@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: stefan.wahren@i2se.com, mlangsdo@redhat.com,
suzuki.poulose@arm.com, marc.zyngier@arm.com,
catalin.marinas@arm.com, julien.thierry@arm.com,
will.deacon@arm.com, linux-kernel@vger.kernel.org,
Jeremy Linton <jeremy.linton@arm.com>,
steven.price@arm.com, ykaukab@suse.de, dave.martin@arm.com,
shankerd@codeaurora.org
Subject: [PATCH v3 2/7] arm64: add sysfs vulnerability show for spectre v1
Date: Wed, 9 Jan 2019 17:55:39 -0600 [thread overview]
Message-ID: <20190109235544.2992426-3-jeremy.linton@arm.com> (raw)
In-Reply-To: <20190109235544.2992426-1-jeremy.linton@arm.com>
From: Mian Yousaf Kaukab <ykaukab@suse.de>
spectre v1, has been mitigated, and the mitigation is
always active.
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
arch/arm64/kernel/cpu_errata.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 09ac548c9d44..8dde8c616b7e 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -109,6 +109,8 @@ cpu_enable_trap_ctr_access(const struct arm64_cpu_capabilities *__unused)
atomic_t arm64_el2_vector_last_slot = ATOMIC_INIT(-1);
+uint arm64_requested_vuln_attrs = VULN_SPECTREV1;
+
#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
@@ -742,3 +744,18 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
{
}
};
+
+#ifdef CONFIG_GENERIC_CPU_VULNERABILITIES
+
+uint arch_supported_vuln_attr_fields(void)
+{
+ return arm64_requested_vuln_attrs;
+}
+
+ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "Mitigation: __user pointer sanitization\n");
+}
+
+#endif
--
2.17.2
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next prev parent reply other threads:[~2019-01-09 23:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-09 23:55 [PATCH v3 0/7] arm64: add system vulnerability sysfs entries Jeremy Linton
2019-01-09 23:55 ` [PATCH v3 1/7] sysfs/cpu: Allow individual architectures to select vulnerabilities Jeremy Linton
2019-01-14 10:02 ` Suzuki K Poulose
2019-01-18 15:46 ` Greg KH
2019-01-18 16:31 ` Jeremy Linton
2019-01-09 23:55 ` Jeremy Linton [this message]
2019-01-09 23:55 ` [PATCH v3 3/7] arm64: kpti: move check for non-vulnerable CPUs to a function Jeremy Linton
2019-01-12 10:41 ` Stefan Wahren
2019-01-14 11:32 ` Suzuki K Poulose
2019-01-18 16:35 ` Jeremy Linton
2019-01-09 23:55 ` [PATCH v3 4/7] arm64: add sysfs vulnerability show for meltdown Jeremy Linton
2019-01-10 9:23 ` Julien Thierry
2019-01-10 14:10 ` Jeremy Linton
2019-01-10 14:16 ` Julien Thierry
2019-01-09 23:55 ` [PATCH v3 5/7] arm64: add sysfs vulnerability show for spectre v2 Jeremy Linton
2019-01-09 23:55 ` [PATCH v3 6/7] arm64: add sysfs vulnerability show for speculative store bypass Jeremy Linton
2019-01-14 10:15 ` Marc Zyngier
2019-01-14 16:37 ` Jeremy Linton
2019-01-14 17:05 ` Marc Zyngier
2019-01-09 23:55 ` [PATCH v3 7/7] arm64: enable generic CPU vulnerabilites support Jeremy Linton
2019-01-15 19:50 ` [PATCH v3 0/7] arm64: add system vulnerability sysfs entries Stefan Wahren
2019-01-15 21:21 ` Jeremy Linton
2019-01-18 18:05 ` Stefan Wahren
2019-01-18 22:22 ` Jeremy Linton
2019-01-19 11:52 ` Stefan Wahren
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