From: Anshuman Khandual <anshuman.khandual@arm.com>
To: Linu Cherian <linu.cherian@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Ryan Roberts <ryan.roberts@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/5] Add BBML3 cpu feature
Date: Fri, 3 Jul 2026 10:12:28 +0530 [thread overview]
Message-ID: <10192896-e632-4ce9-8fd5-cdd535435581@arm.com> (raw)
In-Reply-To: <akc3Y44XLqY3ZaEX@a079125.arm.com>
On 03/07/26 9:45 AM, Linu Cherian wrote:
> Hi Suzuki,
>
> On Fri, Jul 03, 2026 at 08:47:01AM +0530, Linu Cherian wrote:
>> Hi Suzuki,
>>
>> On Wed, Jul 01, 2026 at 11:11:35AM +0100, Suzuki K Poulose wrote:
>>> On 01/07/2026 10:41, Linu Cherian wrote:
>>>> Patches 1 and 2 introduces BBML3 cpu feature
>>>> Patches 3, 4 and 5 adds more cpus to the BBML3 support list,
>>>> which dont advertise themselves through the standard
>>>> MMFR2_ID registers.
>>>>
>>>> Linu Cherian (5):
>>>> arm64: cpufeature: Add BBML3
>>>> arm64: cpufeature: Detect BBML3 based on MMFR2 ID
>>>
>>>
>>>> arm64: cputype: Add Cortex-A520AE definitions
>>>> arm64: cputype: Add C1-Nano definitions
>>>> arm64: cpufeature: Extend bbml3 support list
>>>
>>> If you could move the last 3 patches to the top, would be easier
>>> for people to back port the "enable" BBLM3 for those CPUs, without
>>> the renaming conflicts.
>>>
>>
>> IMHO, if we change the order, "arm64: cpufeature: Extend bbml3 support list"
>> title need to be tweaked and might not go well with this BBML3 support series.
>> Also, backporting issue wouldnt be a problem if the whole series is
>> backported and not just 3 patches in isolation ?
>>
>
> After looking further on this, i definitely agree that moving those patches up has an
> advantage, w.r.t avoiding dependency on other patches.
A possible patch order could be
arm64/tools/sysreg: Update ID_AA64MMFR2_EL1
arm64/cputype: Add Cortex-A520AE definitions
arm64/cputype: Add C1-Nano definitions
arm64/cpufeature: Extend supports_bbml2_noabort_list
arm64/cpufeature: Add BBML3
arm64/cpufeature: Detect BBML3 based on MMFR2 ID
prev parent reply other threads:[~2026-07-03 4:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-01 9:41 [PATCH 0/5] Add BBML3 cpu feature Linu Cherian
2026-07-01 9:41 ` [PATCH 1/5] arm64: cpufeature: Add BBML3 Linu Cherian
2026-07-01 9:41 ` [PATCH 2/5] arm64: cpufeature: Detect BBML3 based on MMFR2 ID Linu Cherian
2026-07-02 10:45 ` Mark Rutland
2026-07-03 3:06 ` Linu Cherian
2026-07-03 4:36 ` Anshuman Khandual
2026-07-01 9:41 ` [PATCH 3/5] arm64: cputype: Add Cortex-A520AE definitions Linu Cherian
2026-07-03 5:07 ` Anshuman Khandual
2026-07-01 9:41 ` [PATCH 4/5] arm64: cputype: Add C1-Nano definitions Linu Cherian
2026-07-03 5:10 ` Anshuman Khandual
2026-07-01 9:41 ` [PATCH 5/5] arm64: cpufeature: Extend bbml3 support list Linu Cherian
2026-07-02 10:47 ` Mark Rutland
2026-07-03 3:03 ` Linu Cherian
2026-07-01 10:11 ` [PATCH 0/5] Add BBML3 cpu feature Suzuki K Poulose
2026-07-03 3:16 ` Linu Cherian
2026-07-03 4:15 ` Linu Cherian
2026-07-03 4:42 ` Anshuman Khandual [this message]
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