kernel.git/arch/riscv/kernel/efi.c, branch linux-6.19.y

riscv: Use accessors to page table entries instead of direct dereference

2023-12-20T18:48:15Z

As very well explained in commit 20a004e7b017 ("arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables"), an architecture whose page table walker can modify the PTE in parallel must use READ_ONCE()/WRITE_ONCE() macro to avoid any compiler transformation. So apply that to riscv which is such architecture. Signed-off-by: Alexandre Ghiti Acked-by: Anup Patel Link: https://lore.kernel.org/r/20231213203001.179237-5-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt

efi: Discover BTI support in runtime services regions

2023-02-04T08:19:02Z

Add the generic plumbing to detect whether or not the runtime code regions were constructed with BTI/IBT landing pads by the firmware, permitting the OS to enable enforcement when mapping these regions into the OS's address space. Signed-off-by: Ard Biesheuvel Reviewed-by: Kees Cook

riscv: read-only pages should not be writable

2022-05-28T09:39:31Z

If EFI pages are marked as read-only, we should remove the _PAGE_WRITE flag. The current code overwrites an unused value. Fixes: b91540d52a08b ("RISC-V: Add EFI runtime services") Signed-off-by: Heinrich Schuchardt Link: https://lore.kernel.org/r/20220528014132.91052-1-heinrich.schuchardt@canonical.com Signed-off-by: Ard Biesheuvel

RISC-V: Add EFI runtime services

2020-10-02T21:31:28Z

This patch adds EFI runtime service support for RISC-V. Signed-off-by: Atish Patra [ardb: - Remove the page check] Signed-off-by: Ard Biesheuvel Acked-by: Ard Biesheuvel Signed-off-by: Palmer Dabbelt