[PATCH 1/4] [Zesty] powerpc/powernv: Require MMU_NOTIFIER to fix NPU build

[Breno Leitao]

From: Alistair Popple <alistair at popple.id.au>

BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1690412

In the recent commit 1ab66d1fbada ("powerpc/powernv: Introduce address
translation services for Nvlink2") the NPU code gained a dependency on MMU
notifiers.

All our defconfigs have KVM enabled, which selects MMU_NOTIFIER, but if KVM is
not enabled then the build breaks.

Fix it by always selecting MMU_NOTIFIER when we're building powernv.

Fixes: 1ab66d1fbada ("powerpc/powernv: Introduce address translation services for Nvlink2")
Signed-off-by: Alistair Popple <alistair at popple.id.au>
[mpe: Reword change log]
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

(cherry picked from commit abfe8026b505d66dad7a3e5ebe7235f12c29b67d)
Signed-off-by: Breno Leitao <breno.leitao at gmail.com>
---
 arch/powerpc/platforms/powernv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig
index 604190cab522..4d3ca7bf4207 100644
--- a/arch/powerpc/platforms/powernv/Kconfig
+++ b/arch/powerpc/platforms/powernv/Kconfig
@@ -18,6 +18,7 @@ config PPC_POWERNV
 	select CPU_FREQ_GOV_ONDEMAND
 	select CPU_FREQ_GOV_CONSERVATIVE
 	select PPC_DOORBELL
+	select MMU_NOTIFIER
 	default y
 
 config OPAL_PRD
-- 
2.11.0