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riscv: enable mseal sysmap for RV64

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Provide support for CONFIG_MSEAL_SYSTEM_MAPPINGS for RV64, covering the
vdso, vvar.

Passed sysmap_is_sealed and mseal_test self tests.
Passed booting a buildroot rootfs image and a cli debian rootfs image.

Signed-off-by: Jisheng Zhang <[email protected]>
Cc: Jeff Xu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Tested-by: Alexandre Ghiti <[email protected]>
Signed-off-by: Alexandre Ghiti <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>
This commit is contained in:
Jisheng Zhang authored and Palmer Dabbelt committed 2025-06-05 14:03:08 -07:00
1 parent 6093faaf95
commit a869b8c29f
2 files changed
+2 -1
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arch/riscv/Kconfig
+1
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@@ -70,6 +70,7 @@ config RISCV
# LLD >= 14: https://github.com/llvm/llvm-project/issues/50505
select ARCH_SUPPORTS_LTO_CLANG if LLD_VERSION >= 140000
select ARCH_SUPPORTS_LTO_CLANG_THIN if LLD_VERSION >= 140000
select ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS if 64BIT && MMU
select ARCH_SUPPORTS_PAGE_TABLE_CHECK if MMU
select ARCH_SUPPORTS_PER_VMA_LOCK if MMU
select ARCH_SUPPORTS_RT
arch/riscv/kernel/vdso.c
+1 -1
View File
@@ -136,7 +136,7 @@ static int __setup_additional_pages(struct mm_struct *mm,
ret =
_install_special_mapping(mm, vdso_base, vdso_text_len,
(VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC),
(VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC | VM_SEALED_SYSMAP),
vdso_info->cm);
if (IS_ERR(ret))