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Commit 2f7412ba authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
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x86/entry: Align entry text section to PMD boundary 



The (irq)entry text must be visible in the user space page tables. To allow
simple PMD based sharing, make the entry text PMD aligned.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: daniel.gruss@iaik.tugraz.at
Cc: hughd@google.com
Cc: keescook@google.com
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent f7cfbee9

arch/x86/kernel/vmlinux.lds.S

+8 −0
Original line number Diff line number Diff line
@@ -61,11 +61,17 @@ jiffies_64 = jiffies; 
		. = ALIGN(HPAGE_SIZE);				\

		__end_rodata_hpage_align = .;



#define ALIGN_ENTRY_TEXT_BEGIN	. = ALIGN(PMD_SIZE);

#define ALIGN_ENTRY_TEXT_END	. = ALIGN(PMD_SIZE);



#else



#define X64_ALIGN_RODATA_BEGIN

#define X64_ALIGN_RODATA_END



#define ALIGN_ENTRY_TEXT_BEGIN

#define ALIGN_ENTRY_TEXT_END



#endif



PHDRS {
@@ -102,8 +108,10 @@ SECTIONS 
		CPUIDLE_TEXT

		LOCK_TEXT

		KPROBES_TEXT

		ALIGN_ENTRY_TEXT_BEGIN

		ENTRY_TEXT

		IRQENTRY_TEXT

		ALIGN_ENTRY_TEXT_END

		SOFTIRQENTRY_TEXT

		*(.fixup)

		*(.gnu.warning)