arm/arm64: Unify PSCI client support

Quoted 21 lines · Mark Rutland

This series unifies the 32-bit and 64-bit PSCI client code, moving the bulk of the FW invocation and probing out to a common locaiton in drivers/firmware. As part of this, the remaining edge cases for PSCI 0.2 (Trusted OSs rejecting CPU_OFF) are accounted for, maknig both 32-bit adn 64-bit clients more robust.

This results in a reasonable saving in terms of lines of code, and will allow for PSCI 1.0 support to be unified form the beginning, avoiding further duplication.

The series is based on v4.1-rc3.

Since v1 [1]:
* Fix build when PSCI isn't selected
* Don't indirect migrate_info_up_cpu
* Fix ver to u32 in psci_get_version

Thanks,
Mark.

[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-May/341770.html

Quoted 13 lines

Mark Rutland (12):
arm/arm64: kvm: add missing PSCI include
arm64: smp_plat: add get_logical_index
arm64: smp: consistently use error codes
arm64: psci: remove unnecessary id indirection
arm64: psci: support unsigned return values
arm64: psci: account for Trusted OS instances
arm64: psci: kill psci_power_state
arm64: psci: remove ACPI coupling
arm64: psci: factor invocation code to drivers
drivers: psci: support native SMC{32,64} calls
ARM: migrate to common PSCI client code
MAINTAINERS: add PSCI entry

So, apart from some comments I had, the series looks fine.

How do you plan to merge this? I'm happy for it to go through the arm-soc tree (hopefully there are no conflicts with some of Lorenzo's patches for the unification of ACPI/DT CPU initialisation).