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From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Mark Rutland <mark.rutland@arm.com>,
	Stefan Wahren <stefan.wahren@i2se.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Mian Yousaf Kaukab <ykaukab@suse.de>,
	Jeremy Linton <jeremy.linton@arm.com>,
	Andre Przywara <andre.przywara@arm.com>,
	Marc Zyngier <maz@kernel.org>, Will Deacon <will.deacon@arm.com>,
	Will Deacon <will@kernel.org>
Subject: [RFC/RFT PATCH 06/16] arm64: Add sysfs vulnerability show for spectre-v1
Date: Fri,  4 Oct 2019 14:04:20 +0200	[thread overview]
Message-ID: <20191004120430.11929-7-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20191004120430.11929-1-ard.biesheuvel@linaro.org>

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

spectre-v1 has been mitigated and the mitigation is always active.
Report this to userspace via sysfs

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 3891ebccace188af075ce143d8b072b65e90f695)
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 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 7fe3a60d1086..3758ba538a43 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -729,3 +729,9 @@ 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


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  parent reply	other threads:[~2019-10-04 12:09 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-04 12:04 [RFC/RFT PATCH 00/16] arm64: backport SSBS handling to v4.19-stable Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 01/16] arm64: cpufeature: Detect SSBS and advertise to userspace Ard Biesheuvel
2019-10-08 14:35   ` Mark Rutland
2019-10-08 14:39     ` Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 02/16] arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 03/16] KVM: arm64: Set SCTLR_EL2.DSSBS if SSBD is forcefully disabled and !vhe Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 04/16] arm64: docs: Document SSBS HWCAP Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 05/16] arm64: fix SSBS sanitization Ard Biesheuvel
2019-10-04 12:04 ` Ard Biesheuvel [this message]
2019-10-04 12:04 ` [RFC/RFT PATCH 07/16] arm64: add sysfs vulnerability show for meltdown Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 08/16] arm64: enable generic CPU vulnerabilites support Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 09/16] arm64: Provide a command line to disable spectre_v2 mitigation Ard Biesheuvel
2019-10-04 12:04   ` Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 10/16] arm64: Advertise mitigation of Spectre-v2, or lack thereof Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 11/16] arm64: Always enable spectre-v2 vulnerability detection Ard Biesheuvel
2019-10-08 15:05   ` Mark Rutland
2019-10-04 12:04 ` [RFC/RFT PATCH 12/16] arm64: Always enable ssb " Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 13/16] arm64: add sysfs vulnerability show for spectre-v2 Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 14/16] arm64: add sysfs vulnerability show for speculative store bypass Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 15/16] arm64: ssbs: Don't treat CPUs with SSBS as unaffected by SSB Ard Biesheuvel
2019-10-04 12:04 ` [RFC/RFT PATCH 16/16] arm64: Force SSBS on context switch Ard Biesheuvel
2019-10-08  8:12 ` [RFC/RFT PATCH 00/16] arm64: backport SSBS handling to v4.19-stable Ard Biesheuvel
2019-10-08 15:09   ` Mark Rutland
2019-10-08 15:10     ` Ard Biesheuvel

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