[PATCH 5.16 0130/1017] arm64: dts: ti: k3-am65: Fix gic-v3 compatible regs

Greg Kroah-Hartman
2022-04-05T09:08:36Z

From: Nishanth Menon <nm@ti.com>

commit 8cae268b70f387ff9e697ccd62fb2384079124e7 upstream.

Though GIC ARE option is disabled for no GIC-v2 compatibility,
Cortex-A53 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/ddi0500/e/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/ddi0500/e/generic-interrupt-controller-cpu-interface/gic-programmers-model/memory-map

Cc: stable@vger.kernel.org # 5.10+
Fixes: ea47eed33a3f ("arm64: dts: ti: Add Support for AM654 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/20220215201008.15235-2-nm@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 5 ++++-
arch/arm64/boot/dts/ti/k3-am65.dtsi | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)

--- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
@@ -35,7 +35,10 @@
#interrupt-cells = <3>;
interrupt-controller;
reg = <0x00 0x01800000 0x00 0x10000>, /* GICD */
- <0x00 0x01880000 0x00 0x90000>; /* GICR */
+ <0x00 0x01880000 0x00 0x90000>, /* GICR */
+ <0x00 0x6f000000 0x00 0x2000>, /* GICC */
+ <0x00 0x6f010000 0x00 0x1000>, /* GICH */
+ <0x00 0x6f020000 0x00 0x2000>; /* GICV */
/*
* vcpumntirq:
* virtual CPU interface maintenance interrupt
--- a/arch/arm64/boot/dts/ti/k3-am65.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65.dtsi
@@ -86,6 +86,7 @@
<0x00 0x46000000 0x00 0x46000000 0x00 0x00200000>,
<0x00 0x47000000 0x00 0x47000000 0x00 0x00068400>,
<0x00 0x50000000 0x00 0x50000000 0x00 0x8000000>,
+ <0x00 0x6f000000 0x00 0x6f000000 0x00 0x00310000>, /* A53 PERIPHBASE */
<0x00 0x70000000 0x00 0x70000000 0x00 0x200000>,
<0x05 0x00000000 0x05 0x00000000 0x01 0x0000000>,
<0x07 0x00000000 0x07 0x00000000 0x01 0x0000000>;