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authorWang Kefeng <wangkefeng.wang@huawei.com>2022-09-16 14:10:49 +0300
committerRussell King (Oracle) <rmk+kernel@armlinux.org.uk>2022-09-22 10:29:04 +0300
commit14ca1a4690750bb54e1049e49f3140ef48958a6e (patch)
treeff75b1aca3add7ca40a8c05ebaf57071e8c03377 /arch/arm/mm
parent2ccd19b3ffac07cc7e75a2bd1ed779728bb67197 (diff)
downloadlinux-14ca1a4690750bb54e1049e49f3140ef48958a6e.tar.xz
ARM: 9247/1: mm: set readonly for MT_MEMORY_RO with ARM_LPAE
MT_MEMORY_RO is introduced by commit 598f0a99fa8a ("ARM: 9210/1: Mark the FDT_FIXED sections as shareable"), which is a readonly memory type for FDT area, but there are some different between ARM_LPAE and non-ARM_LPAE, we need to setup PMD_SECT_AP2 and L_PMD_SECT_RDONLY for MT_MEMORY_RO when ARM_LAPE enabled. non-ARM_LPAE 0xff800000-0xffa00000 2M PGD KERNEL ro NX SHD ARM_LPAE 0xff800000-0xffc00000 4M PMD RW NX SHD ARM_LPAE+fix 0xff800000-0xffc00000 4M PMD ro NX SHD Fixes: 598f0a99fa8a ("ARM: 9210/1: Mark the FDT_FIXED sections as shareable") Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/mmu.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index a49f0b9c0f75..463fc2a8448f 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -300,7 +300,11 @@ static struct mem_type mem_types[] __ro_after_init = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
L_PTE_XN | L_PTE_RDONLY,
.prot_l1 = PMD_TYPE_TABLE,
+#ifdef CONFIG_ARM_LPAE
+ .prot_sect = PMD_TYPE_SECT | L_PMD_SECT_RDONLY | PMD_SECT_AP2,
+#else
.prot_sect = PMD_TYPE_SECT,
+#endif
.domain = DOMAIN_KERNEL,
},
[MT_ROM] = {