diff options
| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-02-25 15:54:10 -0500 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2013-02-25 13:42:37 -0800 |
| commit | 1256276c98dbcfb009ac8e0687df9a1e291fd149 (patch) | |
| tree | 44a85b0517106d94e8a82a98146e786117ca83c4 /arch/x86 | |
| parent | a2fd6419174470f5ae6383f5037d0ee21ed9833f (diff) | |
x86, doc: Fix incorrect comment about 64-bit code segment descriptors
The AMD64 Architecture Programmer's Manual Volume 2, on page
89 mentions: "If the processor is running in 64-bit mode (L=1),
the only valid setting of the D bit is 0." This matches
with what the code does.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Link: http://lkml.kernel.org/r/1361825650-14031-4-git-send-email-konrad.wilk@oracle.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/head_64.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 980053c4b9c..37f5304e80f 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -49,7 +49,7 @@ L3_START_KERNEL = pud_index(__START_KERNEL_map) startup_64: /* - * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 1, + * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0, * and someone has loaded an identity mapped page table * for us. These identity mapped page tables map all of the * kernel pages and possibly all of memory. @@ -146,7 +146,7 @@ ident_complete: jmp secondary_startup_64 ENTRY(secondary_startup_64) /* - * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 1, + * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0, * and someone has loaded a mapped page table. * * %esi holds a physical pointer to real_mode_data. |