On Tue, 4 Apr 2023 15:40:37 +0000, Oliver Upton wrote:
> The Arm SMCCC is rather prescriptive in regards to the allocation of
> SMCCC function ID ranges. Many of the hypercall ranges have an
> associated specification from Arm (FF-A, PSCI, SDEI, etc.) with some
> room for vendor-specific implementations.
>
> The ever-expanding SMCCC surface leaves a lot of work within KVM for
> providing new features. Furthermore, KVM implements its own
> vendor-specific ABI, with little room for other implementations (like
> Hyper-V, for example). Rather than cramming it all into the kernel we
> should provide a way for userspace to handle hypercalls.
>
> [...]
Applied to next, thanks!
[01/13] KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL
commit: e65733b5c59a1ea20324a03494364958bef3fc68
[02/13] KVM: arm64: Add a helper to check if a VM has ran once
commit: de40bb8abb764f6866d82c4e2a43acdb22892cf4
[03/13] KVM: arm64: Add vm fd device attribute accessors
commit: e0fc6b21616dd917899ee4a2d4126b4a963c0871
[04/13] KVM: arm64: Rename SMC/HVC call handler to reflect reality
commit: aac94968126beb9846c12a940f1302ece7849b4f
[05/13] KVM: arm64: Start handling SMCs from EL1
commit: c2d2e9b3d8ce9db825a5630d9d52d542f5138ae0
[06/13] KVM: arm64: Refactor hvc filtering to support different actions
commit: a8308b3fc9494953c453480fb277e24f82f7d2b9
[07/13] KVM: arm64: Use a maple tree to represent the SMCCC filter
commit: fb88707dd39bd1d5ec4a058776de9ee99bcc7b72
[08/13] KVM: arm64: Add support for KVM_EXIT_HYPERCALL
commit: d824dff1919bbd523d4d5c860437d043c0ad121d
[09/13] KVM: arm64: Introduce support for userspace SMCCC filtering
commit: 821d935c87bc95253f82deec3cbb457ccf3de003
[10/13] KVM: arm64: Return NOT_SUPPORTED to guest for unknown PSCI version
commit: 7e484d2785e2a2e526a6b2679d3e4c1402ffe0ec
[11/13] KVM: arm64: Let errors from SMCCC emulation to reach userspace
commit: 37c8e494794786aa8e4acba1f0f5b45f37b11699
[12/13] KVM: selftests: Add a helper for SMCCC calls with SMC instruction
commit: fab19915f498b0e76fabd4d78841c99b7b6d7851
[13/13] KVM: selftests: Add test for SMCCC filter
commit: 60e7dade498eb881bcdf0d9a420c97625f73acc1
I've also added the extra patch to deal with with AArch32 T1
encodings of HVC/SMC. Please check the conflict resolution!
Cheers,
M.
--
Without deviation from the norm, progress is not possible.
