diff options
Diffstat (limited to 'arch/x86/boot/pmjump.S')
| -rw-r--r-- | arch/x86/boot/pmjump.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/boot/pmjump.S b/arch/x86/boot/pmjump.S index ef0da1f2c7fd..f7153d0d476e 100644 --- a/arch/x86/boot/pmjump.S +++ b/arch/x86/boot/pmjump.S | |||
| @@ -36,6 +36,7 @@ protected_mode_jump: | |||
| 36 | addl %ebx, 2f | 36 | addl %ebx, 2f |
| 37 | 37 | ||
| 38 | movw $__BOOT_DS, %cx | 38 | movw $__BOOT_DS, %cx |
| 39 | movw $__BOOT_TSS, %di | ||
| 39 | 40 | ||
| 40 | movl %cr0, %edx | 41 | movl %cr0, %edx |
| 41 | orb $1, %dl # Protected mode (PE) bit | 42 | orb $1, %dl # Protected mode (PE) bit |
| @@ -63,6 +64,9 @@ in_pm32: | |||
| 63 | # a valid stack if some debugging hack wants to use it. | 64 | # a valid stack if some debugging hack wants to use it. |
| 64 | addl %ebx, %esp | 65 | addl %ebx, %esp |
| 65 | 66 | ||
| 67 | # Set up TR to make Intel VT happy | ||
| 68 | ltr %di | ||
| 69 | |||
| 66 | # Clear registers to allow for future extensions to the | 70 | # Clear registers to allow for future extensions to the |
| 67 | # 32-bit boot protocol | 71 | # 32-bit boot protocol |
| 68 | xorl %ecx, %ecx | 72 | xorl %ecx, %ecx |
| @@ -71,6 +75,9 @@ in_pm32: | |||
| 71 | xorl %ebp, %ebp | 75 | xorl %ebp, %ebp |
| 72 | xorl %edi, %edi | 76 | xorl %edi, %edi |
| 73 | 77 | ||
| 78 | # Set up LDTR to make Intel VT happy | ||
| 79 | lldt %cx | ||
| 80 | |||
| 74 | jmpl *%eax # Jump to the 32-bit entrypoint | 81 | jmpl *%eax # Jump to the 32-bit entrypoint |
| 75 | 82 | ||
| 76 | .size in_pm32, .-in_pm32 | 83 | .size in_pm32, .-in_pm32 |