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Re: [PATCH v16 43/99] target/arm: move a15 cpu model away from the TCG-o


From: Claudio Fontana
Subject: Re: [PATCH v16 43/99] target/arm: move a15 cpu model away from the TCG-only models
Date: Thu, 17 Jun 2021 22:35:09 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0

On 6/17/21 8:01 PM, Alex Bennée wrote:
> 
> Richard Henderson <richard.henderson@linaro.org> writes:
> 
>> On 6/4/21 8:52 AM, Alex Bennée wrote:
>>> From: Claudio Fontana<cfontana@suse.de>
>>> Cortex-A15 is the only ARM cpu class we need in KVM too.
>>> We will be able to move it to tcg/ once the board code and
>>> configurations
>>> are fixed.
>>> Signed-off-by: Claudio Fontana<cfontana@suse.de>
>>> Signed-off-by: Alex Bennée<alex.bennee@linaro.org>
>>> ---
>>>   target/arm/cpu32.h   |  4 +++
>>>   target/arm/cpu32.c   | 73 ++++++++++++++++++++++++++++++++++++++++++++
>>>   target/arm/cpu_tcg.c | 67 ----------------------------------------
>>>   3 files changed, 77 insertions(+), 67 deletions(-)
>>
>> I don't follow this one.  Why would kvm, which is 64-bit only, require
>> a 32-bit only cpu?
>>
>> I guess I can accept that our board configurations are old and
>> fragile, and I realize there are already 99 bottles of beer on^W^W^W^W
>> patches here, but what needs to happen to fix this properly?
> 
> I'll drop this and fix whatever we need to. 32 bit ARM KVM is listed in
> removed-features so I think we are good.

Problem is, if I recall correctly, that the virt board currently requires an 
a15 to exist.

> 
>>
>> I guess I can give it an
>> Acked-by: Richard Henderson <richard.henderson@linaro.org>
>>
>> if it helps us move forward.
>>
>>
>> r~
> 
> 




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