Commit-ID: 4c94117c7fa1bea36a15157022dbe5efee474340 Gitweb: http://git.kernel.org/tip/4c94117c7fa1bea36a15157022dbe5efee474340 Author: Kirill A. Shutemov <kirill.shute...@linux.intel.com> AuthorDate: Tue, 6 Jun 2017 14:31:23 +0300 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 13 Jun 2017 08:56:52 +0200
x86/boot/efi: Fix __KERNEL_CS definition of GDT entry on 64-bit configurations Define __KERNEL_CS GDT entry as long mode (.L=1, .D=0) on 64-bit configurations. Signed-off-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com> Reviewed-by: Matt Fleming <m...@codeblueprint.co.uk> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Brian Gerst <brge...@gmail.com> Cc: Dave Hansen <dave.han...@intel.com> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Josh Poimboeuf <jpoim...@redhat.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: linux-a...@vger.kernel.org Cc: linux...@kvack.org Link: http://lkml.kernel.org/r/20170606113133.22974-5-kirill.shute...@linux.intel.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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 1d5093d..b75c20f 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++;
