From: Suzuki K Poulose <Suzuki.Poulose@arm.com>
To: Dave Martin <Dave.Martin@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, mark.rutland@arm.com,
ckadabi@codeaurora.org, ard.biesheuvel@linaro.org,
marc.zyngier@arm.com, catalin.marinas@arm.com,
will.deacon@arm.com, linux-kernel@vger.kernel.org,
jnair@caviumnetworks.com, robin.murphy@arm.com
Subject: Re: [PATCH v3 09/22] arm64: capabilities: Split the processing of errata work arounds
Date: Thu, 8 Mar 2018 12:24:40 +0000 [thread overview]
Message-ID: <b5b90236-7734-2c05-65fd-57fcbe732b6c@arm.com> (raw)
In-Reply-To: <20180209181834.GG5862@e103592.cambridge.arm.com>
On 09/02/18 18:18, Dave Martin wrote:
> On Fri, Feb 09, 2018 at 05:54:48PM +0000, Suzuki K Poulose wrote:
>> Right now we run through the errata workarounds check on all boot
>> active CPUs, with SCOPE_ALL. This doesn't help with detecting the
>> errata's with a SYSTEM_SCOPE. While nobody uses it, let us clean
>> this up in preparation for merging capability handling.
>
> errata; and SCOPE_SYSTEM (if I'm being pedantic)
>
> To make it clearer this this is adding support for new behaviour rather
> than changing old behaviour, perhaps change "This doesn't help ...
> While nobody uses it ..." to something like:
>
> "This wouldn't help for detecting erratum workarounds with SCOPE_SYSTEM.
> There are none yet, but we plan to introduce some: let us clean this up
> so that such workarounds can be detected and enabled correctly."
Fixed
>>
>> So, we run the checks with SCOPE_LOCAL_CPU on all CPUs and SCOPE_SYSTEM
>> checks are run only once after all the boot time CPUs are active.
>>
>> Cc: Dave Martin <dave.martin@arm.com>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
>
> Otherwise,
>
> Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Thanks
Suzuki
next prev parent reply other threads:[~2018-03-08 12:24 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-09 17:54 [PATCH v3 00/21] arm64: Rework cpu capabilities handling Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 01/21] arm64: capabilities: Move errata work around check on boot CPU Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 01/22] arm64: capabilities: Update prototype for enable call back Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 02/21] arm64: capabilities: Move errata processing code Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 02/22] arm64: capabilities: Move errata work around check on boot CPU Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 03/22] arm64: capabilities: Move errata processing code Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 03/21] arm64: capabilities: Prepare for fine grained capabilities Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 04/21] arm64: capabilities: Add flags to handle the conflicts on late CPU Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 04/22] arm64: capabilities: Prepare for fine grained capabilities Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 05/22] arm64: capabilities: Add flags to handle the conflicts on late CPU Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 05/21] arm64: capabilities: Unify the verification Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 06/21] arm64: capabilities: Filter the entries based on a given mask Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 06/22] arm64: capabilities: Unify the verification Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 07/22] arm64: capabilities: Filter the entries based on a given mask Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 07/21] arm64: capabilities: Prepare for grouping features and errata work arounds Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 08/22] " Suzuki K Poulose
2018-02-09 18:11 ` Dave Martin
2018-02-09 17:54 ` [PATCH v3 08/21] arm64: capabilities: Split the processing of " Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 09/21] arm64: capabilities: Allow features based on local CPU scope Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 09/22] arm64: capabilities: Split the processing of errata work arounds Suzuki K Poulose
2018-02-09 18:18 ` Dave Martin
2018-03-08 12:24 ` Suzuki K Poulose [this message]
2018-02-09 17:54 ` [PATCH v3 10/22] arm64: capabilities: Allow features based on local CPU scope Suzuki K Poulose
2018-02-09 18:22 ` Dave Martin
2018-03-08 12:14 ` Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 10/21] arm64: capabilities: Group handling of features and errata workarounds Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 11/22] " Suzuki K Poulose
2018-02-09 18:25 ` Dave Martin
2018-02-09 17:54 ` [PATCH v3 11/21] arm64: capabilities: Introduce weak features based on local CPU Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 12/22] " Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 12/21] arm64: capabilities: Restrict KPTI detection to boot-time CPUs Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 13/21] arm64: capabilities: Add support for features enabled early Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 13/22] arm64: capabilities: Restrict KPTI detection to boot-time CPUs Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 14/22] arm64: capabilities: Add support for features enabled early Suzuki K Poulose
2018-02-12 17:17 ` Dave Martin
2018-03-07 17:42 ` Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 14/21] arm64: capabilities: Change scope of VHE to Boot CPU feature Suzuki K Poulose
2018-02-09 17:54 ` [PATCH v3 15/22] " Suzuki K Poulose
2018-02-12 17:17 ` Dave Martin
2018-03-08 12:10 ` Suzuki K Poulose
2018-03-08 13:43 ` Dave Martin
2018-02-09 17:55 ` [PATCH v3 15/21] arm64: capabilities: Clean up midr range helpers Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 16/21] arm64: Add helpers for checking CPU MIDR against a range Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 16/22] arm64: capabilities: Clean up midr range helpers Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 17/22] arm64: Add helpers for checking CPU MIDR against a range Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 17/21] arm64: capabilities: Add support for checks based on a list of MIDRs Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 18/22] " Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 18/21] arm64: capabilities: Handle shared entries Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 19/21] arm64: Add MIDR encoding for Arm Cortex-A55 and Cortex-A35 Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 19/22] arm64: capabilities: Handle shared entries Suzuki K Poulose
2018-02-12 17:17 ` Dave Martin
2018-03-08 12:16 ` Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 20/22] arm64: Add MIDR encoding for Arm Cortex-A55 and Cortex-A35 Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 20/21] arm64: Delay enabling hardware DBM feature Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 21/21] arm64: Add work around for Arm Cortex-A55 Erratum 1024718 Suzuki K Poulose
2018-02-09 17:55 ` [PATCH v3 21/22] arm64: Delay enabling hardware DBM feature Suzuki K Poulose
2018-02-09 18:58 ` Dave Martin
2018-03-07 17:39 ` Suzuki K Poulose
2018-03-08 13:53 ` Dave Martin
2018-03-08 13:55 ` Mark Rutland
2018-02-09 17:55 ` [PATCH v3 22/22] arm64: Add work around for Arm Cortex-A55 Erratum 1024718 Suzuki K Poulose
2018-02-09 18:04 ` [PATCH v3 00/21] arm64: Rework cpu capabilities handling Suzuki K Poulose
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