Messages in this thread Patch in this message | | | From | "Kirill A. Shutemov" <> | Subject | [PATCHv7 04/14] x86/boot/efi: Fix __KERNEL_CS definition of GDT entry on 64-bit configuration | Date | Tue, 6 Jun 2017 14:31:23 +0300 |
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Define __KERNEL_CS GDT entry as long mode (.L=1, .D=0) on 64-bit configuration.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Matt Fleming <matt@codeblueprint.co.uk> --- arch/x86/boot/compressed/eboot.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c index 1d5093d1f319..b75c20f779ea 100644 --- a/arch/x86/boot/compressed/eboot.c +++ b/arch/x86/boot/compressed/eboot.c @@ -1059,8 +1059,13 @@ struct boot_params *efi_main(struct efi_config *c, desc->p = 1; desc->limit = 0xf; desc->avl = 0; - desc->l = 0; - desc->d = SEG_OP_SIZE_32BIT; + if (IS_ENABLED(CONFIG_X86_64)) { + desc->l = 1; + desc->d = 0; + } else { + desc->l = 0; + desc->d = SEG_OP_SIZE_32BIT; + } desc->g = SEG_GRANULARITY_4KB; desc->base2 = 0x00; desc++; -- 2.11.0
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