kernel/arch/arm/include/asm/ptdump.h, branch linux-6.2.y

ARM: 9255/1: efi/dump UEFI runtime page tables for ARM

2022-11-07T14:19:01Z

UEFI runtime page tables dump only for ARM64 at present, but ARM support EFI and ARM_PTDUMP_DEBUGFS now. Since ARM could potentially execute with a 1G/3G user/kernel split, choosing 1G as the upper limit for UEFI runtime end, with this, we could enable UEFI runtime page tables on ARM. Acked-by: Ard Biesheuvel Tested-by: Ard Biesheuvel Signed-off-by: Kefeng Wang Signed-off-by: Russell King (Oracle)

arm: dump: no need to check return value of debugfs_create functions

2019-06-03T13:49:07Z

When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Russell King Cc: Jinbum Park Cc: linux-arm-kernel@lists.infradead.org Reviewed-by: Kees Cook Acked-by: Laura Abbott Signed-off-by: Greg Kroah-Hartman

ARM: 8737/1: mm: dump: add checking for writable and executable

2018-01-21T15:32:20Z

Page mappings with full RWX permissions are a security risk. x86, arm64 has an option to walk the page tables and dump any bad pages. (1404d6f13e47 ("arm64: dump: Add checking for writable and exectuable pages")) Add a similar implementation for arm. Reviewed-by: Kees Cook Tested-by: Laura Abbott Reviewed-by: Laura Abbott Signed-off-by: Jinbum Park Signed-off-by: Russell King

ARM: 8735/1: mm: dump: make page table dumping reusable

2018-01-21T15:32:17Z

This patch refactors the arm page table dumping code, so multiple tables may be registered with the framework. This patch refers below commits of arm64. (4674fdb9f149 ("arm64: mm: dump: make page table dumping reusable")) (4ddb9bf83349 ("arm64: dump: Make ptdump debugfs a separate option")) Reviewed-by: Kees Cook Tested-by: Laura Abbott Reviewed-by: Laura Abbott Signed-off-by: Jinbum Park Signed-off-by: Russell King