linux-kernel - [PATCH v5 05/16] powerpc/32: always populate page tables for Abatron BDI.

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Message-Id: <8187e3e7b08436528d850176deb611609fcae57d.1550775950.git.christophe.leroy@c-s.fr>
Date:   Thu, 21 Feb 2019 19:08:41 +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>, j.neuschaefer@....net
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v5 05/16] powerpc/32: always populate page tables for Abatron
 BDI.

When CONFIG_BDI_SWITCH is set, the page tables have to be populated
allthough large TLBs are used, because the BDI switch knows nothing
about those large TLBs which are handled directly in TLB miss logic.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/mm/pgtable_32.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index c4b0eb51f6d8..a000768a5cc9 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -263,7 +263,10 @@ void __init mapin_ram(void)
 		if (base >= top)
 			continue;
 		base = mmu_mapin_ram(base, top);
-		__mapin_ram_chunk(base, top);
+		if (IS_ENABLED(CONFIG_BDI_SWITCH))
+			__mapin_ram_chunk(reg->base, top);
+		else
+			__mapin_ram_chunk(base, top);
 	}
 }
 
-- 
2.13.3