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Commit 4c94117c authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Ingo Molnar
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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: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: default avatarMatt Fleming <matt@codeblueprint.co.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20170606113133.22974-5-kirill.shutemov@linux.intel.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent f8fceacb

arch/x86/boot/compressed/eboot.c

+7 −2
Original line number Diff line number Diff line
@@ -1059,8 +1059,13 @@ struct boot_params *efi_main(struct efi_config *c, 
	desc->p = 1;

	desc->limit = 0xf;

	desc->avl = 0;

	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++;