[PATCH] KVM: arm64: Clarify vcpu reset behaviour

[Will Deacon]

On Tue, Apr 06, 2021 at 01:58:41PM +0100, Marc Zyngier wrote:
> Although the KVM_ARM_VCPU_INIT documentation mention that the
> registers are reset to their "initial values", it doesn't
> describe what these values are.
> 
> Describe this state explicitly.
> 
> Signed-off-by: Marc Zyngier <maz at kernel.org>
> ---
>  Documentation/virt/kvm/api.rst | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
> index 38e327d4b479..e2237e4e10ba 100644
> --- a/Documentation/virt/kvm/api.rst
> +++ b/Documentation/virt/kvm/api.rst
> @@ -3115,6 +3115,16 @@ optional features it should have.  This will cause a reset of the cpu
>  registers to their initial values.  If this is not called, KVM_RUN will
>  return ENOEXEC for that vcpu.
>  
> +The initial values are defined as:
> +	- Processor state:
> +		* AArch64: EL1h, D, A, I and F bits set
> +		* Aarch32: SVC, D, A, I and F bits set

nit, but capitalisation should be "AArch32"

Is "SVC" sufficient, or do we also need to describe Arm vs Thumb?

Will