linux-kernel - [PATCH v7 12/16] powerpc/mm: Enable 8M hugepage support with HW assistance on the 8xx

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Date:   Wed, 28 Nov 2018 11:46:45 +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 v7 12/16] powerpc/mm: Enable 8M hugepage support with HW
 assistance on the 8xx

HW assistance naturally supports 8M huge pages without
further modifications.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/mm/tlb_nohash.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index 4f79639e432f..8ad7aab150b7 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -97,6 +97,9 @@ struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT] = {
 		.shift	= 14,
 	},
 #endif
+	[MMU_PAGE_8M] = {
+		.shift	= 23,
+	},
 };
 #else
 struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT] = {
-- 
2.13.3