tree c0be98ff60a861bcfe12539cb4563cec6a88e552
parent 92e7a8317d9cbad7eb7952b2de47c10d9a8da81d
author Mark Rutland <mark.rutland@arm.com> 1523531470 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1524205243 +0200

drivers/firmware: Expose psci_get_version through psci_ops structure


From: Will Deacon <will.deacon@arm.com>

commit d68e3ba5303f7e1099f51fdcd155f5263da8569b upstream.

Entry into recent versions of ARM Trusted Firmware will invalidate the CPU
branch predictor state in order to protect against aliasing attacks.

This patch exposes the PSCI "VERSION" function via psci_ops, so that it
can be invoked outside of the PSCI driver where necessary.

Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com> [v4.9 backport]
Tested-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>