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/[email protected]/
[3] https://developer.arm.com/documentation/100095/0002/way1382452674438
Fixes: b8545f9d3a54 ("arm64: dts: ti: Add initial support for J721S2 SoC")
Cc: [email protected]
Reported-by: Marc Zyngier <[email protected]>
Signed-off-by: Nishanth Menon <[email protected]>
---
Testing: based on next-20220215
J721s2-evm Log: https://gist.github.com/nmenon/302b0bcfbb1b5b8743fa5c242eb7d15f
arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi | 5 ++++-
arch/arm64/boot/dts/ti/k3-j721s2.dtsi | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
index b04db1d3ab61..be7f39299894 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
@@ -34,7 +34,10 @@ gic500: interrupt-controller@1800000 {
#interrupt-cells = <3>;
interrupt-controller;
reg = <0x00 0x01800000 0x00 0x200000>, /* GICD */
- <0x00 0x01900000 0x00 0x100000>; /* GICR */
+ <0x00 0x01900000 0x00 0x100000>, /* GICR */
+ <0x00 0x6f000000 0x00 0x2000>, /* GICC */
+ <0x00 0x6f010000 0x00 0x1000>, /* GICH */
+ <0x00 0x6f020000 0x00 0x2000>; /* GICV */
/* vcpumntirq: virtual CPU interface maintenance interrupt */
interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
diff --git a/arch/arm64/boot/dts/ti/k3-j721s2.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2.dtsi
index fe5234c40f6c..7b930a85a29d 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2.dtsi
@@ -119,6 +119,7 @@ cbass_main: bus@100000 {
<0x00 0x18000000 0x00 0x18000000 0x00 0x08000000>, /* PCIe1 DAT0 */
<0x00 0x64800000 0x00 0x64800000 0x00 0x0070c000>, /* C71_1 */
<0x00 0x65800000 0x00 0x65800000 0x00 0x0070c000>, /* C71_2 */
+ <0x00 0x6f000000 0x00 0x6f000000 0x00 0x00310000>, /* A72 PERIPHBASE */
<0x00 0x70000000 0x00 0x70000000 0x00 0x00400000>, /* MSMC RAM */
<0x00 0x30000000 0x00 0x30000000 0x00 0x0c400000>, /* MAIN NAVSS */
<0x41 0x00000000 0x41 0x00000000 0x01 0x00000000>, /* PCIe1 DAT1 */
--
2.31.1