diff options
| -rw-r--r-- | arch/x86/cpu/i386/call64.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/cpu/i386/call64.S b/arch/x86/cpu/i386/call64.S index 424732fa3fa..f979f9e5f0e 100644 --- a/arch/x86/cpu/i386/call64.S +++ b/arch/x86/cpu/i386/call64.S @@ -25,6 +25,11 @@ cpu_call64: push %edx /* arg1 = setup_base */ mov %eax, %ebx + # disable paging + movl %cr0, %eax + andl $~X86_CR0_PG, %eax + movl %eax, %cr0 + /* Load new GDT with the 64bit segments using 32bit descriptor */ leal gdt, %eax movl %eax, gdt+2 @@ -67,7 +72,8 @@ cpu_call64: pushl %eax /* Enter paged protected Mode, activating Long Mode */ - movl $(X86_CR0_PG | X86_CR0_PE), %eax + movl %cr0, %eax + orl $X86_CR0_PG, %eax movl %eax, %cr0 /* Jump from 32bit compatibility mode into 64bit mode. */ |