diff options
| author | Kristina Martsenko <kristina.martsenko@arm.com> | 2020-03-13 12:04:56 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-03-18 12:50:20 +0300 |
| commit | 33e45234987ea3ed4b05fc512f4441696478f12d (patch) | |
| tree | e7dbf5120c409f20c20d7b095dca1244ec3f3b85 /arch/arm64/include/asm/processor.h | |
| parent | 6982934e19f8ebb4152ba77308facdb1a38533f9 (diff) | |
| download | linux-33e45234987ea3ed4b05fc512f4441696478f12d.tar.xz | |
arm64: initialize and switch ptrauth kernel keys
Set up keys to use pointer authentication within the kernel. The kernel
will be compiled with APIAKey instructions, the other keys are currently
unused. Each task is given its own APIAKey, which is initialized during
fork. The key is changed during context switch and on kernel entry from
EL0.
The keys for idle threads need to be set before calling any C functions,
because it is not possible to enter and exit a function with different
keys.
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Vincenzo Frascino <Vincenzo.Frascino@arm.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
[Amit: Modified secondary cores key structure, comments]
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/processor.h')
| -rw-r--r-- | arch/arm64/include/asm/processor.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 496a92873290..4c77da5dc819 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -147,6 +147,7 @@ struct thread_struct { struct debug_info debug; /* debugging */ #ifdef CONFIG_ARM64_PTR_AUTH struct ptrauth_keys_user keys_user; + struct ptrauth_keys_kernel keys_kernel; #endif }; |