commit 35e452f9a15fedcb2dfec3b2c6dd46e7d302e2b8
author Manish Pandey <manish.pandey2@arm.com> Thu Feb 18 21:36:34 2021 +0000
committer Olivier Deprez <olivier.deprez@arm.com> Wed Apr 14 18:00:15 2021 +0200
tree b315e452951dfd301ab1983748599ba6d75c364c
parent 63c23a0010d358e412c104db8f83a870975d9c9e

Provide support for FIQ interrupts

This patch introduces support for FIQ virtual interrupts by adding
an "interrupt type" configuration for each INTID.

Following changes are done:
  - Helpers added to inject a virtual FIQ by setting HCR_EL2.VF
  - hf_interrupt_enable hypervisor call updated with a new
    "interrupt type" argument

Nominally, we intend to signal an NS interrupt to a SP as a virtual FIQ
using GICv3. The same interrupt can be signaled as a virtual IRQ if such
option is passed in the Hafnium interrupt enable call.
The reasoning is to ease migration of TEEs relying on receiving physical
Group1 NS/Group0 interrupts as FIQ (or foreign interrupts).
The same TEE now running as a Secure Partition receives a virtual FIQ
for a NS interrupt (or Group0 interrupt).
As mentioned above, there is also the flexibility to receive all
interrupts (Group1 S/Group1 NS/Group0) to the same vIRQ vector.

Change-Id: I78daf1ae226ea9cc01f65da36ae31ed9fff84f42
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>