[PATCH] arm64: tegra: Fix GIC400 missing GICH/GICV register regions

[PATCH] arm64: tegra: Fix GIC400 missing GICH/GICV register regions

[Marc Zyngier]

GIC400 has full support for virtualization, and yet the tegra186
DT doesn't expose the GICH/GICV regions (despite exposing the
maintenance interrupt that only makes sense for virtualization).

Add the missing regions, based on the hunch that the HW doesn't
use the CPU build-in interfaces, but instead the external ones
provided by the GIC. KVM's virtual GIC now works with this change.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/boot/dts/nvidia/tegra186.dtsi | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
index 8eb61dd9921e..fd44545e124d 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
@@ -630,7 +630,9 @@ gic: interrupt-controller@3881000 {
 		#interrupt-cells = <3>;
 		interrupt-controller;
 		reg = <0x0 0x03881000 0x0 0x1000>,
-		      <0x0 0x03882000 0x0 0x2000>;
+		      <0x0 0x03882000 0x0 0x2000>,
+		      <0x0 0x03884000 0x0 0x2000>,
+		      <0x0 0x03886000 0x0 0x2000>;
 		interrupts = <GIC_PPI 9
 			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
 		interrupt-parent = <&gic>;
-- 
2.28.0

Re: [PATCH] arm64: tegra: Fix GIC400 missing GICH/GICV register regions

[Thierry Reding]

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On Mon, Oct 05, 2020 at 02:32:56PM +0100, Marc Zyngier wrote:
> GIC400 has full support for virtualization, and yet the tegra186
> DT doesn't expose the GICH/GICV regions (despite exposing the
> maintenance interrupt that only makes sense for virtualization).
> 
> Add the missing regions, based on the hunch that the HW doesn't
> use the CPU build-in interfaces, but instead the external ones
> provided by the GIC. KVM's virtual GIC now works with this change.
> 
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
>  arch/arm64/boot/dts/nvidia/tegra186.dtsi | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Applied, thanks.

Thierry

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