On 6 November 2014 20:49, Bin Meng <bmeng...@gmail.com> wrote: > On Fri, Nov 7, 2014 at 4:20 AM, Simon Glass <s...@chromium.org> wrote: >> We should invalidate the TLB right at the start to ensure that we don't get >> false address translations even though paging is disabled. >> >> Signed-off-by: Simon Glass <s...@chromium.org> >> --- >> >> arch/x86/cpu/start16.S | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/arch/x86/cpu/start16.S b/arch/x86/cpu/start16.S >> index e718d4b..445d5a1 100644 >> --- a/arch/x86/cpu/start16.S >> +++ b/arch/x86/cpu/start16.S >> @@ -24,6 +24,9 @@ start16: >> /* Set the Cold Boot / Hard Reset flag */ >> movl $GD_FLG_COLD_BOOT, %ebx >> >> + xorl %eax, %eax >> + movl %eax, %cr3 /* Invalidate TLB */ >> + >> /* Turn off cache (this might require a 486-class CPU) */ >> movl %cr0, %eax >> orl $(X86_CR0_NW | X86_CR0_CD), %eax >> -- > > Reviewed-by: Bin Meng <bmeng...@gmail.com>
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