linux-kernel - Re: [PATCH v1 0/2] KVM: arm64: Making BT Field in ID_AA64PFR1

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Message-ID: <8fd7e58d-1d87-430d-a974-47ee05bc72de@redhat.com>
Date: Tue, 18 Jun 2024 13:55:22 +0800
From: Shaoqin Huang <shahuang@...hat.com>
To: Oliver Upton <oliver.upton@...ux.dev>
Cc: Marc Zyngier <maz@...nel.org>, kvmarm@...ts.linux.dev,
 Catalin Marinas <catalin.marinas@....com>, James Morse
 <james.morse@....com>, kvm@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
 Shuah Khan <shuah@...nel.org>, Suzuki K Poulose <suzuki.poulose@....com>,
 Will Deacon <will@...nel.org>, Zenghui Yu <yuzenghui@...wei.com>
Subject: Re: [PATCH v1 0/2] KVM: arm64: Making BT Field in ID_AA64PFR1_EL1
 writable

Hi Oliver,

On 6/18/24 01:40, Oliver Upton wrote:
> On Mon, Jun 17, 2024 at 03:51:29AM -0400, Shaoqin Huang wrote:
>> In this patch series, we try to make more register fields writable like
>> ID_AA64PFR1_EL1.BT since this can benifit the migration between some of the
>> machines which have different BT values.
>>
>> Changelog:
>> ----------
>> RFCv1 -> v1:
>>    * Fix the compilation error.
>>    * Delete the machine specific information and make the description more
>>      generable.
> 
> Can you please address Marc's feedback?
> 
> If we only make things writable a field at a time it's going to take
> forever to catch up w/ the architecture.
> 
> https://lore.kernel.org/kvmarm/86zfrpjkt6.wl-maz@kernel.org/

Ok. I will update the patch series again with tackling the full register.

Thanks,
Shaoqin

> 

-- 
Shaoqin