Messages in this thread | | | Date | Fri, 05 Apr 2024 11:15:37 +0100 | From | Marc Zyngier <> | Subject | Re: [RFC 5/8] KVM: arm64: Explicitly handle MDSELR_EL1 traps as UNDEFINED |
| |
On Fri, 05 Apr 2024 09:00:05 +0100, Anshuman Khandual <anshuman.khandual@arm.com> wrote: > > Currently read_sanitised_id_aa64dfr0_el1() caps the ID_AA64DFR0.DebugVer to > ID_AA64DFR0_DebugVer_V8P8, resulting in FEAT_Debugv8p9 not being exposed to > the guest. MDSELR_EL1 register access in the guest, is currently trapped by > the existing configuration of the fine-grained traps.
Please add support for the HDFGxTR2_EL2 registers in the trap routing arrays, add support for the corresponding FGUs in the corresponding structure, and condition the UNDEF on the lack of *guest* support for the feature.
In short, implement the architecture as described in the pseudocode, and not a cheap shortcut.
Thanks,
M.
-- Without deviation from the norm, progress is not possible.
| |