linux-kernel - [PATCH v1 40/46] powerpc/8xx: Map IMMR with a huge page

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <26f9e79d95a1ad94dd05e1e782f721f5d5d2664d.1584360344.git.christophe.leroy@c-s.fr>
Date:   Mon, 16 Mar 2020 12:36:26 +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 v1 40/46] powerpc/8xx: Map IMMR with a huge page

Map the IMMR area with a single 512k huge page.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/mm/nohash/8xx.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c
index 81ddcd9554e1..57e0c7496a6a 100644
--- a/arch/powerpc/mm/nohash/8xx.c
+++ b/arch/powerpc/mm/nohash/8xx.c
@@ -117,17 +117,13 @@ static bool immr_is_mapped __initdata;
 
 void __init mmu_mapin_immr(void)
 {
-	unsigned long p = PHYS_IMMR_BASE;
-	unsigned long v = VIRT_IMMR_BASE;
-	int offset;
-
 	if (immr_is_mapped)
 		return;
 
 	immr_is_mapped = true;
 
-	for (offset = 0; offset < IMMR_SIZE; offset += PAGE_SIZE)
-		map_kernel_page(v + offset, p + offset, PAGE_KERNEL_NCG);
+	__early_map_kernel_hugepage(VIRT_IMMR_BASE, PHYS_IMMR_BASE,
+				    PAGE_KERNEL_NCG, MMU_PAGE_512K, true);
 }
 
 unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top)
-- 
2.25.0