| From foo@baz Sun 27 Oct 2019 09:50:54 AM CET |
| From: Ard Biesheuvel <ard.biesheuvel@linaro.org> |
| Date: Thu, 24 Oct 2019 14:48:21 +0200 |
| Subject: arm64: Add sysfs vulnerability show for spectre-v1 |
| To: stable@vger.kernel.org |
| Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>, Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Marc Zyngier <maz@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, Jeremy Linton <jeremy.linton@arm.com>, Andre Przywara <andre.przywara@arm.com>, Alexandru Elisei <alexandru.elisei@arm.com>, Mian Yousaf Kaukab <ykaukab@suse.de>, Stefan Wahren <stefan.wahren@i2se.com>, Will Deacon <will.deacon@arm.com> |
| Message-ID: <20191024124833.4158-37-ard.biesheuvel@linaro.org> |
| |
| From: Mian Yousaf Kaukab <ykaukab@suse.de> |
| |
| [ Upstream commit 3891ebccace188af075ce143d8b072b65e90f695 ] |
| |
| 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> |
| Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| arch/arm64/kernel/cpu_errata.c | 6 ++++++ |
| 1 file changed, 6 insertions(+) |
| |
| --- a/arch/arm64/kernel/cpu_errata.c |
| +++ b/arch/arm64/kernel/cpu_errata.c |
| @@ -638,3 +638,9 @@ const struct arm64_cpu_capabilities arm6 |
| { |
| } |
| }; |
| + |
| +ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, |
| + char *buf) |
| +{ |
| + return sprintf(buf, "Mitigation: __user pointer sanitization\n"); |
| +} |
