arm64: dts: ti: k3-j721e: Fix gic-v3 compatible regs
authorNishanth Menon <nm@ti.com>
Tue, 15 Feb 2022 20:10:05 +0000 (14:10 -0600)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 8 Apr 2022 12:22:58 +0000 (14:22 +0200)
commite931b8494a51e5e347f1430eef96339d867962b2
tree99100ceeb14fd7f5b34797a88e1047a00968e2e5
parent146ad3e0177d4fb31b552d19a3a8f358943d50f0
arm64: dts: ti: k3-j721e: Fix gic-v3 compatible regs

commit a06ed27f3bc63ab9e10007dc0118d910908eb045 upstream.

Though GIC ARE option is disabled for no GIC-v2 compatibility,
Cortex-A72 is free to implement the CPU interface as long as it
communicates with the GIC using the stream protocol. This requires
that the SoC integration mark out the PERIPHBASE[1] as reserved area
within the SoC. See longer discussion in [2] for further information.

Update the GIC register map to indicate offsets from PERIPHBASE based
on [3]. Without doing this, systems like kvm will not function with
gic-v2 emulation.

[1] https://developer.arm.com/documentation/100095/0002/system-control/aarch64-register-descriptions/configuration-base-address-register--el1
[2] https://lore.kernel.org/all/87k0e0tirw.wl-maz@kernel.org/
[3] https://developer.arm.com/documentation/100095/0002/way1382452674438

Cc: stable@vger.kernel.org # 5.10+
Fixes: 2d87061e70de ("arm64: dts: ti: Add Support for J721E SoC")
Reported-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220215201008.15235-3-nm@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
arch/arm64/boot/dts/ti/k3-j721e.dtsi