]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
arm64: Relax GIC version check during early boot
authorVladimir Murzin <vladimir.murzin@arm.com>
Wed, 20 Feb 2019 11:43:05 +0000 (11:43 +0000)
committerWill Deacon <will.deacon@arm.com>
Wed, 20 Feb 2019 14:05:37 +0000 (14:05 +0000)
commit74698f6971f25d045301139413578865fc2bd8f9
treec7746935f5718abdf8ff17f15647e0d8207d3107
parent0738c8b5915c7eaf1e6007b441008e8f3b460443
arm64: Relax GIC version check during early boot

Updates to the GIC architecture allow ID_AA64PFR0_EL1.GIC to have
values other than 0 or 1. At the moment, Linux is quite strict in the
way it handles this field at early boot stage (cpufeature is fine) and
will refuse to use the system register CPU interface if it doesn't
find the value 1.

Fixes: 021f653791ad17e03f98aaa7fb933816ae16f161 ("irqchip: gic-v3: Initial support for GICv3")
Reported-by: Chase Conklin <Chase.Conklin@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/kernel/head.S