linux-kernel - [PATCH] powerpc/8xx: Allow pinning IMMR TLB when using early debug console

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Message-Id: <8b818f91a5dd1e33f4ffac11ad45d72a8caafb80.1545290681.git.christophe.leroy@c-s.fr>
Date:   Thu, 20 Dec 2018 07:25:28 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc/8xx: Allow pinning IMMR TLB when using early debug
 console

CONFIG_EARLY_DEBUG_CPM requires IMMR area TLB to be pinned
otherwise it doesn't survive MMU_init, and the boot fails.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 7996ec33f1b4..45aed802ba86 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -1192,7 +1192,7 @@ config PIN_TLB_DATA
 
 config PIN_TLB_IMMR
 	bool "Pinned TLB for IMMR"
-	depends on PIN_TLB
+	depends on PIN_TLB || PPC_EARLY_DEBUG_CPM
 	default y
 
 config PIN_TLB_TEXT
-- 
2.13.3