Unverified Commit a869b8c2 authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Palmer Dabbelt
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riscv: enable mseal sysmap for RV64 



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: default avatarJisheng Zhang <jszhang@kernel.org>
Cc: Jeff Xu <jeffxu@chromium.org>
Link: https://lore.kernel.org/r/20250426135954.5614-1-jszhang@kernel.org


Tested-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: default avatarPalmer Dabbelt <palmer@dabbelt.com>
parent 6093faaf

arch/riscv/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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
Original line number Diff line number Diff line
@@ -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))