On Tue, 13 Sep 2022 09:44:33 +0000, Oliver Upton wrote:
> For reasons unknown, the Arm architecture defines the 64-bit views of
> the 32-bit ID registers as UNKNOWN [1]. This combines poorly with the
> fact that KVM unconditionally exposes these registers to userspace,
> which could throw a wrench in migration between 64-bit only systems.
>
> This series reworks KVM's definition of these registers to RAZ/WI with
> the goal of providing consistent register values across 64-bit machines.
>
> [...]
Applied to kvm-arm64/next, thanks!
[1/7] KVM: arm64: Use visibility hook to treat ID regs as RAZ
commit: 34b4d20399e6fad2e3379b11e68dff1d1549274e
[2/7] KVM: arm64: Remove internal accessor helpers for id regs
commit: 4782ccc8ef50fabb70bab9fa73186285dba6d91d
[3/7] KVM: arm64: Drop raz parameter from read_id_reg()
commit: cdd5036d048ca96ef5212fb37f4f56db40cb1bc2
[4/7] KVM: arm64: Spin off helper for calling visibility hook
commit: 5d9a718b64e428a40939806873ecf16f072008b3
[5/7] KVM: arm64: Add a visibility bit to ignore user writes
commit: 4de06e4c1dc949c35c16e4423b4ccd735264b0a9
[6/7] KVM: arm64: Treat 32bit ID registers as RAZ/WI on 64bit-only system
commit: d5efec7ed826b3b29c6847bf59383d8d07347a4e
[7/7] KVM: selftests: Add test for AArch32 ID registers
commit: 797b84517c190053597e3f7e03ead15da872e04d
Cheers,
M.
--
Marc Zyngier <maz@xxxxxxxxxx>
