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Matt Redfearn b1f9f9fb3f MIPS: Generic: Support GIC in EIC mode 
[ Upstream commit 7bf8b16d1b ]

The GIC supports running in External Interrupt Controller (EIC) mode,
and will signal this via cpu_has_veic if enabled in hardware. Currently
the generic kernel will panic if cpu_has_veic is set - but the GIC can
legitimately set this flag if either configured to boot in EIC mode, or
if the GIC driver enables this mode. Make the kernel not panic in this
case, and instead just check if the GIC is present. If so, use it's CPU
local interrupt routing functions. If an EIC is present, but it is not
the GIC, then the kernel does not know how to get the VIRQ for the CPU
local interrupts and should panic. Support for alternative EICs being
present is needed here for the generic kernel to support them.

Suggested-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/18191/
Signed-off-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-26 11:02:17 +02:00
..
board-boston.its.S MIPS: generic: Move Boston FIT image source to its own file 2017-08-29 15:21:52 +02:00
board-ni169445.its.S MIPS: generic: Fix NI 169445 its build 2017-10-31 22:55:44 +00:00
board-sead3.c Update MIPS email addresses 2017-11-03 09:02:30 -07:00
init.c Update MIPS email addresses 2017-11-03 09:02:30 -07:00
irq.c MIPS: Generic: Support GIC in EIC mode 2018-04-26 11:02:17 +02:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kexec.c MIPS: Update email address for Marcin Nowakowski 2017-11-02 10:58:43 +00:00
Makefile Update MIPS email addresses 2017-11-03 09:02:30 -07:00
Platform Update MIPS email addresses 2017-11-03 09:02:30 -07:00
proc.c Update MIPS email addresses 2017-11-03 09:02:30 -07:00
vmlinux.its.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
yamon-dt.c Update MIPS email addresses 2017-11-03 09:02:30 -07:00