diff options
| author | Arvind Sankar <[email protected]> | 2020-02-02 12:13:50 -0500 |
|---|---|---|
| committer | Ard Biesheuvel <[email protected]> | 2020-02-22 23:37:37 +0100 |
| commit | cae0e431a02cd63fecaf677ae166f184644125a7 (patch) | |
| tree | bc1c810dc236591c3d11ee07d604a25706f8bebe | |
| parent | 32d009137a5646947d450da6fa641a1f4dc1e42c (diff) | |
x86/boot: Clear direction and interrupt flags in startup_64
startup_32 already clears these flags on entry, do it in startup_64 as
well for consistency.
The direction flag in particular is not specified to be cleared in the
boot protocol documentation, and we currently call into C code
(paging_prepare) without explicitly clearing it.
Signed-off-by: Arvind Sankar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ard Biesheuvel <[email protected]>
| -rw-r--r-- | arch/x86/boot/compressed/head_64.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 27eb2a6786db..69cc6c68741e 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -264,6 +264,9 @@ SYM_CODE_START(startup_64) * and command line. */ + cld + cli + /* Setup data segments. */ xorl %eax, %eax movl %eax, %ds |