powerpc/powernv: Require MMU_NOTIFIER to fix NPU build

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@popple.id.au>
[mpe: Reword change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry picked from commit abfe8026b505d66dad7a3e5ebe7235f12c29b67d)
Signed-off-by: Breno Leitao <breno.leitao@gmail.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig
index 604190cab5227c6fd8957baa00aa3ae6ca87a790..4d3ca7bf42072442c378ca5ce9bb67ed4ef82e27 100644 (file)
--- 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