linux-kernel - Re: [PATCH] KVM: arm64: Writable TGRAN*

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Message-ID: <eb045be7-69ca-fe71-0333-086b71bb624f@redhat.com>
Date: Wed, 12 Mar 2025 18:33:09 +0100 (CET)
From: Sebastian Ott <sebott@...hat.com>
To: Oliver Upton <oliver.upton@...ux.dev>
cc: Marc Zyngier <maz@...nel.org>, Joey Gouly <joey.gouly@....com>, 
    Suzuki K Poulose <suzuki.poulose@....com>, 
    Zenghui Yu <yuzenghui@...wei.com>, 
    Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
    linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev, 
    linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: arm64: Writable TGRAN*_2

Hi Oliver,

On Wed, 12 Mar 2025, Oliver Upton wrote:
> Hi Sebastian,
>
> On Thu, Mar 06, 2025 at 07:40:13PM +0100, Sebastian Ott wrote:
>> Allow userspace to write the safe (NI) value for ID_AA64MMFR0_EL1.TGRAN*_2.
>> Disallow to change these fields for NV since kvm provides a sanitized view
>> for them based on the PAGE_SIZE.
>> Also add these bits to the set_id_regs selftest.
>>
>> Signed-off-by: Sebastian Ott <sebott@...hat.com>
>
> I can't tell what you've based this patch on, it certainly doesn't apply
> on a 6.14 rc. Consider telling git to include the base commit next time
> you generate a patch.

Ok, I'll keep it in mind for next time.
(It was kvm-arm64/next + 2 pkvm series from the list that I applied
manually.)

> Please do selftests changes in a separate patch.
>
> Don't worry about respinning, I'll fix this up and queue it in a moment.

Thanks!
Sebastian