[RFC PATCH v2 2/8] arm64: Implement frame types

Madhavan T. Venkataraman madvenka at linux.microsoft.com
Fri Mar 19 15:02:52 GMT 2021



On 3/19/21 9:40 AM, Madhavan T. Venkataraman wrote:
>> Are you referring to ARMv8.1 VHE extension where the kernel can run
>> at EL2? Could you elaborate? I thought that EL2 was basically for
>> Hypervisors.
> KVM is the main case, yes - IIRC otherwise it's mainly error handlers
> but I might be missing something.  We do recommend that the kernel is
> started at EL2 where possible.
> 
> Actually now I look again it's just not adding anything on EL2 entries
> at all, they use a separate set of macros which aren't updated - this
> will only update things for EL0 and EL1 entries so my comment above
> about this tracking EL2 as EL1 isn't accurate.

So, do I need to do anything here?

Madhavan



More information about the linux-arm-kernel mailing list