From: Nishanth Menon <nm@xxxxxx> commit de60edf1be3d42d4a1b303b41c7c53b2f865726e 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@xxxxxxxxxx/ [3] https://developer.arm.com/documentation/ddi0500/e/generic-interrupt-controller-cpu-interface/gic-programmers-model/memory-map Cc: stable@xxxxxxxxxxxxxxx Fixes: 8abae9389bdb ("arm64: dts: ti: Add support for AM642 SoC") Reported-by: Marc Zyngier <maz@xxxxxxxxxx> Signed-off-by: Nishanth Menon <nm@xxxxxx> Acked-by: Marc Zyngier <maz@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220215201008.15235-5-nm@xxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 5 ++++- arch/arm64/boot/dts/ti/k3-am64.dtsi | 1 + 2 files changed, 5 insertions(+), 1 deletion(-) --- 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 --- a/arch/arm64/boot/dts/ti/k3-am64.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am64.dtsi @@ -87,6 +87,7 @@ <0x00 0x68000000 0x00 0x68000000 0x00 0x08000000>, /* PCIe DAT0 */ <0x00 0x70000000 0x00 0x70000000 0x00 0x00200000>, /* OC SRAM */ <0x00 0x78000000 0x00 0x78000000 0x00 0x00800000>, /* Main R5FSS */ + <0x01 0x00000000 0x01 0x00000000 0x00 0x00310000>, /* A53 PERIPHBASE */ <0x06 0x00000000 0x06 0x00000000 0x01 0x00000000>, /* PCIe DAT1 */ <0x05 0x00000000 0x05 0x00000000 0x01 0x00000000>, /* FSS0 DAT3 */
