Untested, but clearly bit 12 is the one that needs to be tested. Signed-off-by: Nadav Amit <nadav.amit@xxxxxxxxx> --- x86/cstart64.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/x86/cstart64.S b/x86/cstart64.S index 21db10f..8626f02 100644 --- a/x86/cstart64.S +++ b/x86/cstart64.S @@ -243,7 +243,7 @@ start64: setup_5level_page_table: /* Check if 5-level paging has already enabled */ mov %cr4, %rax - test $12, %eax + bt $12, %eax jnz lvl5 pushq $32 -- 2.17.1
