Commit cae0e431 authored by Arvind Sankar's avatar Arvind Sankar Committed by Ard Biesheuvel

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: default avatarArvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200202171353.3736319-5-nivedita@alum.mit.eduSigned-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent 32d00913
...@@ -264,6 +264,9 @@ SYM_CODE_START(startup_64) ...@@ -264,6 +264,9 @@ SYM_CODE_START(startup_64)
* and command line. * and command line.
*/ */
cld
cli
/* Setup data segments. */ /* Setup data segments. */
xorl %eax, %eax xorl %eax, %eax
movl %eax, %ds movl %eax, %ds
......
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