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| author | Nishanth Menon <nm@ti.com> | 2022-02-15 14:10:07 -0600 |
|---|---|---|
| committer | Nishanth Menon <nm@ti.com> | 2022-02-22 11:04:12 -0600 |
| commit | de60edf1be3d42d4a1b303b41c7c53b2f865726e (patch) | |
| tree | f8988b91a7eea9e1b89b597e20199793ac3dc673 /arch/arm64/boot/dts/ti/k3-am64-main.dtsi | |
| parent | 1a307cc299430dd7139d351a3b8941f493dfa885 (diff) | |
| download | lwn-de60edf1be3d42d4a1b303b41c7c53b2f865726e.tar.gz lwn-de60edf1be3d42d4a1b303b41c7c53b2f865726e.zip | |
arm64: dts: ti: k3-am64: Fix gic-v3 compatible regs
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
Fixes: 8abae9389bdb ("arm64: dts: ti: Add support for AM642 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/20220215201008.15235-5-nm@ti.com
Diffstat (limited to 'arch/arm64/boot/dts/ti/k3-am64-main.dtsi')
| -rw-r--r-- | arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi index 0c9f3bce8418..f64b368c6c37 100644 --- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi @@ -59,7 +59,10 @@ #interrupt-cells = <3>; interrupt-controller; reg = <0x00 0x01800000 0x00 0x10000>, /* GICD */ - <0x00 0x01840000 0x00 0xC0000>; /* GICR */ + <0x00 0x01840000 0x00 0xC0000>, /* GICR */ + <0x01 0x00000000 0x00 0x2000>, /* GICC */ + <0x01 0x00010000 0x00 0x1000>, /* GICH */ + <0x01 0x00020000 0x00 0x2000>; /* GICV */ /* * vcpumntirq: * virtual CPU interface maintenance interrupt |