From: Tony Lindgren <tony@atomide.com>
To: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Marc Zyngier <marc.zyngier@arm.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Christoffer Dall <christoffer.dall@arm.com>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH 07/14] ARM: spectre-v2: add Cortex A8 and A15 validation of the IBE bit
Date: Tue, 22 May 2018 11:28:12 -0700 [thread overview]
Message-ID: <20180522182811.GM98604@atomide.com> (raw)
In-Reply-To: <E1fKjFJ-000641-5N@rmk-PC.armlinux.org.uk>
* Russell King <rmk+kernel@armlinux.org.uk> [180521 12:09]:
> When the branch predictor hardening is enabled, firmware must have set
> the IBE bit in the auxiliary control register. If this bit has not
> been set, the Spectre workarounds will not be functional.
>
> Add validation that this bit is set, and print a warning at alert level
> if this is not the case.
>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Yup the alert is working:
Tested-by: Tony Lindgren <tony@atomide.com>
WARNING: multiple messages have this Message-ID (diff)
From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 07/14] ARM: spectre-v2: add Cortex A8 and A15 validation of the IBE bit
Date: Tue, 22 May 2018 11:28:12 -0700 [thread overview]
Message-ID: <20180522182811.GM98604@atomide.com> (raw)
In-Reply-To: <E1fKjFJ-000641-5N@rmk-PC.armlinux.org.uk>
* Russell King <rmk+kernel@armlinux.org.uk> [180521 12:09]:
> When the branch predictor hardening is enabled, firmware must have set
> the IBE bit in the auxiliary control register. If this bit has not
> been set, the Spectre workarounds will not be functional.
>
> Add validation that this bit is set, and print a warning at alert level
> if this is not the case.
>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Yup the alert is working:
Tested-by: Tony Lindgren <tony@atomide.com>
next prev parent reply other threads:[~2018-05-22 18:28 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-21 11:42 [PATCH v2 00/14] ARM Spectre variant 2 fixes Russell King - ARM Linux
2018-05-21 11:42 ` Russell King - ARM Linux
2018-05-21 11:44 ` [PATCH 01/14] ARM: add CPU part numbers for Cortex A73, A75 and Brahma B15 Russell King
2018-05-21 11:44 ` Russell King
2018-05-21 11:44 ` [PATCH 02/14] ARM: bugs: prepare processor bug infrastructure Russell King
2018-05-21 11:44 ` Russell King
2018-05-21 11:44 ` [PATCH 03/14] ARM: bugs: hook processor bug checking into SMP and suspend paths Russell King
2018-05-21 11:44 ` Russell King
2018-05-24 23:30 ` Florian Fainelli
2018-05-24 23:30 ` Florian Fainelli
2018-05-25 10:03 ` Russell King - ARM Linux
2018-05-25 10:03 ` Russell King - ARM Linux
2018-05-25 11:31 ` Russell King - ARM Linux
2018-05-25 11:31 ` Russell King - ARM Linux
2018-05-21 11:44 ` [PATCH 04/14] ARM: bugs: add support for per-processor bug checking Russell King
2018-05-21 11:44 ` Russell King
2018-05-21 11:44 ` [PATCH 05/14] ARM: spectre: add Kconfig symbol for CPUs vulnerable to Spectre Russell King
2018-05-21 11:44 ` Russell King
2018-05-21 11:44 ` [PATCH 06/14] ARM: spectre-v2: harden branch predictor on context switches Russell King
2018-05-21 11:44 ` Russell King
2018-05-22 3:21 ` Florian Fainelli
2018-05-22 3:21 ` Florian Fainelli
2018-05-22 9:55 ` Russell King - ARM Linux
2018-05-22 9:55 ` Russell King - ARM Linux
2018-05-22 18:27 ` Tony Lindgren
2018-05-22 18:27 ` Tony Lindgren
2018-05-21 11:44 ` [PATCH 07/14] ARM: spectre-v2: add Cortex A8 and A15 validation of the IBE bit Russell King
2018-05-21 11:44 ` Russell King
2018-05-22 18:28 ` Tony Lindgren [this message]
2018-05-22 18:28 ` Tony Lindgren
2018-05-21 11:45 ` [PATCH 08/14] ARM: spectre-v2: harden user aborts in kernel space Russell King
2018-05-21 11:45 ` Russell King
2018-05-22 17:15 ` Marc Zyngier
2018-05-22 17:15 ` Marc Zyngier
2018-05-22 17:56 ` Russell King - ARM Linux
2018-05-22 17:56 ` Russell King - ARM Linux
2018-05-22 18:12 ` Russell King - ARM Linux
2018-05-22 18:12 ` Russell King - ARM Linux
2018-05-22 18:19 ` Florian Fainelli
2018-05-22 18:19 ` Florian Fainelli
2018-05-22 23:25 ` Russell King - ARM Linux
2018-05-22 23:25 ` Russell King - ARM Linux
2018-05-21 11:45 ` [PATCH 09/14] ARM: spectre-v2: add PSCI based hardening Russell King
2018-05-21 11:45 ` Russell King
2018-05-22 17:24 ` Marc Zyngier
2018-05-22 17:24 ` Marc Zyngier
2018-05-22 17:57 ` Russell King - ARM Linux
2018-05-22 17:57 ` Russell King - ARM Linux
2018-05-23 7:25 ` Marc Zyngier
2018-05-23 7:25 ` Marc Zyngier
2018-05-23 19:45 ` Russell King - ARM Linux
2018-05-23 19:45 ` Russell King - ARM Linux
2018-05-24 12:03 ` Marc Zyngier
2018-05-24 12:03 ` Marc Zyngier
2018-05-24 12:30 ` Russell King - ARM Linux
2018-05-24 12:30 ` Russell King - ARM Linux
2018-05-24 12:49 ` Marc Zyngier
2018-05-24 12:49 ` Marc Zyngier
2018-05-24 13:04 ` Russell King - ARM Linux
2018-05-24 13:04 ` Russell King - ARM Linux
2018-05-21 11:45 ` [PATCH 10/14] ARM: KVM: invalidate BTB on guest exit for Cortex-A12/A17 Russell King
2018-05-21 11:45 ` Russell King
2018-05-21 11:45 ` [PATCH 11/14] ARM: KVM: invalidate icache on guest exit for Cortex-A15 Russell King
2018-05-21 11:45 ` Russell King
2018-05-21 11:45 ` [PATCH 12/14] ARM: spectre-v2: KVM: invalidate icache on guest exit for Brahma B15 Russell King
2018-05-21 11:45 ` Russell King
2018-05-22 3:22 ` Florian Fainelli
2018-05-22 3:22 ` Florian Fainelli
2018-05-21 11:45 ` [PATCH 13/14] ARM: KVM: Add SMCCC_ARCH_WORKAROUND_1 fast handling Russell King
2018-05-21 11:45 ` Russell King
2018-05-23 10:50 ` Marc Zyngier
2018-05-23 10:50 ` Marc Zyngier
2018-05-21 11:45 ` [PATCH 14/14] ARM: KVM: report support for SMCCC_ARCH_WORKAROUND_1 Russell King
2018-05-21 11:45 ` Russell King
2018-05-24 23:18 ` [PATCH v2 00/14] ARM Spectre variant 2 fixes Florian Fainelli
2018-05-24 23:18 ` Florian Fainelli
2018-05-25 10:00 ` Russell King - ARM Linux
2018-05-25 10:00 ` Russell King - ARM Linux
-- strict thread matches above, loose matches on Subject: below --
2018-05-16 10:59 [PATCH 0/14] " Russell King - ARM Linux
2018-05-16 11:01 ` [PATCH 07/14] ARM: spectre-v2: add Cortex A8 and A15 validation of the IBE bit Russell King
2018-05-16 11:01 ` Russell King
2018-05-16 16:33 ` Florian Fainelli
2018-05-16 16:33 ` Florian Fainelli
2018-05-16 16:34 ` Florian Fainelli
2018-05-16 16:34 ` Florian Fainelli
2018-05-22 10:38 ` Geert Uytterhoeven
2018-05-22 10:38 ` Geert Uytterhoeven
2018-05-22 10:55 ` Russell King - ARM Linux
2018-05-22 10:55 ` Russell King - ARM Linux
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