From: Joerg Roedel <jroedel@xxxxxxx> Reload the GDT after switching to virtual addresses to make sure it will not go away when the lower mappings are removed. Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> --- arch/x86/kernel/head_64.S | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 5219a70b3fb4..ebb7d512c9d3 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -163,6 +163,11 @@ SYM_CODE_START(secondary_startup_64) 1: UNWIND_HINT_EMPTY + /* Setup boot GDT descriptor and load boot GDT */ + leaq boot_gdt(%rip), %rax + movq %rax, boot_gdt_base(%rip) + lgdt boot_gdt_descr(%rip) + /* Check if nx is implemented */ movl $0x80000001, %eax cpuid -- 2.17.1
