[PATCH] powerpc/microwatt: Add mmu bits to device tree

[Joel Stanley <joel@jms.id.au>]

In commit 5402e239d09f ("powerpc/64s: Get LPID bit width from device
tree") the kernel tried to determine the pid and lpid bits from the
device tree. If they are not found, there is a fallback, but Microwatt
wasn't covered as has the unusual configuration of being both !HV and bare
metal.

Set the values in the device tree to avoid having to add a special case.
The lpid value is the only one required, but add both for completeness.

Fixes: 5402e239d09f ("powerpc/64s: Get LPID bit width from device tree")
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
 arch/powerpc/boot/dts/microwatt.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/boot/dts/microwatt.dts b/arch/powerpc/boot/dts/microwatt.dts
index 65b270a90f94..b69db1d275cd 100644
--- a/arch/powerpc/boot/dts/microwatt.dts
+++ b/arch/powerpc/boot/dts/microwatt.dts
@@ -90,6 +90,8 @@ PowerPC,Microwatt@0 {
 			64-bit;
 			d-cache-size = <0x1000>;
 			ibm,chip-id = <0>;
+			ibm,mmu-lpid-bits = <12>;
+			ibm,mmu-pid-bits = <20>;
 		};
 	};
 
-- 
2.35.1