4 Commits

Author	SHA1	Message	Date
Alexandre Ghiti	edf9556472	riscv: Use accessors to page table entries instead of direct dereference ... As very well explained in commit 20a004e7b0 ("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 <alexghiti@rivosinc.com> Acked-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20231213203001.179237-5-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>	2023-12-20 10:48:15 -08:00
Ard Biesheuvel	cf1d2ffcc6	efi: Discover BTI support in runtime services regions ... 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 <ardb@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org>	2023-02-04 09:19:02 +01:00
Heinrich Schuchardt	630f972d76	riscv: read-only pages should not be writable ... If EFI pages are marked as read-only, we should remove the _PAGE_WRITE flag. The current code overwrites an unused value. Fixes: b91540d52a ("RISC-V: Add EFI runtime services") Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Link: https://lore.kernel.org/r/20220528014132.91052-1-heinrich.schuchardt@canonical.com Signed-off-by: Ard Biesheuvel <ardb@kernel.org>	2022-05-28 11:39:31 +02:00
Atish Patra	b91540d52a	RISC-V: Add EFI runtime services ... This patch adds EFI runtime service support for RISC-V. Signed-off-by: Atish Patra <atish.patra@wdc.com> [ardb: - Remove the page check] Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>	2020-10-02 14:31:28 -07:00