Re: [PATCH v4 15/17] whpx: arm64: implement -cpu host

[Mohamed Mediouni]

> On 4. Aug 2025, at 23:27, Pierrick Bouvier <pierrick.bouv...@linaro.org> 
> wrote:
> 
> On 8/4/25 7:23 AM, Mohamed Mediouni wrote:
>> OpenProcessorKey and ReadRegU64 adapted from:
>> https://github.com/FEX-Emu/FEX/blob/e6de17e72ef03aa88ba14fa0ec13163061608c74/Source/Windows/Common/CPUFeatures.cpp#L62
>> Signed-off-by: Mohamed Mediouni <moha...@unpredictable.fr>
>> ---
>>  hw/arm/virt.c              |   2 +-
>>  target/arm/cpu64.c         |  19 ++++---
>>  target/arm/whpx/whpx-all.c | 107 +++++++++++++++++++++++++++++++++++++
>>  target/arm/whpx_arm.h      |   1 +
>>  4 files changed, 122 insertions(+), 7 deletions(-)
> 
> Reviewed-by: Pierrick Bouvier <pierrick.bouv...@linaro.org>
> 
> Additional question, what is missing for SVE/SME support?
For SVE it’s mainly about the state save/restore part. And having good hardware 
for testing it too.

For SME, Hyper-V doesn’t support it yet, but done preventively so that it 
doesn’t suddenly get enabled once that happens. (and that scenario happened on 
macOS and promptly broke things)