diff options
Diffstat (limited to 'arch/x86/kernel/head_64.S')
| -rw-r--r-- | arch/x86/kernel/head_64.S | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index a15d381e6020..90de28841242 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -142,6 +142,9 @@ startup_64: decl %ecx jnz 1b + test %rbp, %rbp + jz .Lskip_fixup + /* * Fixup the kernel text+data virtual addresses. Note that * we might write invalid pmds, when the kernel is relocated @@ -149,9 +152,9 @@ startup_64: * beyond _end. */ leaq level2_kernel_pgt(%rip), %rdi - leaq 4096(%rdi), %r8 + leaq PAGE_SIZE(%rdi), %r8 /* See if it is a valid page table entry */ -1: testb $1, 0(%rdi) +1: testb $_PAGE_PRESENT, 0(%rdi) jz 2f addq %rbp, 0(%rdi) /* Go to the next page */ @@ -162,6 +165,7 @@ startup_64: /* Fixup phys_base */ addq %rbp, phys_base(%rip) +.Lskip_fixup: movq $(early_level4_pgt - __START_KERNEL_map), %rax jmp 1f ENTRY(secondary_startup_64) |