[PATCH] arm64: Revamp HCR_EL2.E2H RES1 detection

[Marc Zyngier]

On Thu, 09 Oct 2025 13:12:39 +0100, Marc Zyngier wrote:
> We currently have two ways to identify CPUs that only implement FEAT_VHE
> and not FEAT_E2H0:
> 
> - either they advertise it via ID_AA64MMFR4_EL1.E2H0,
> - or the HCR_EL2.E2H bit is RAO/WI
> 
> However, there is a third category of "cpus" that fall between these
> two cases: on CPUs that do not implement FEAT_FGT, it is IMPDEF whether
> an access to ID_AA64MMFR4_EL1 can trap to EL2 when the register value
> is zero.
> 
> [...]

Applied to fixes, thanks!

[1/1] arm64: Revamp HCR_EL2.E2H RES1 detection
      commit: ca88ecdce5f51874a7c151809bd2c936ee0d3805

Cheers,

	M.
-- 
Without deviation from the norm, progress is not possible.