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Commit 2240bbb6 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

arm64: KVM: HYP mode idmap support 



Add the necessary infrastructure for identity-mapped HYP page
tables. Idmap-ed code must be in the ".hyp.idmap.text" linker
section.

The rest of the HYP ends up in ".hyp.text".

Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 36311607

arch/arm64/kernel/vmlinux.lds.S

+20 −0
Original line number Diff line number Diff line
@@ -17,6 +17,19 @@ ENTRY(stext) 


jiffies = jiffies_64;



#define HYPERVISOR_TEXT					\

	/*						\

	 * Force the alignment to be compatible with	\

	 * the vectors requirements			\

	 */						\

	. = ALIGN(2048);				\

	VMLINUX_SYMBOL(__hyp_idmap_text_start) = .;	\

	*(.hyp.idmap.text)				\

	VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;	\

	VMLINUX_SYMBOL(__hyp_text_start) = .;		\

	*(.hyp.text)					\

	VMLINUX_SYMBOL(__hyp_text_end) = .;



SECTIONS

{

	/*
@@ -49,6 +62,7 @@ SECTIONS 
			TEXT_TEXT

			SCHED_TEXT

			LOCK_TEXT

			HYPERVISOR_TEXT

			*(.fixup)

			*(.gnu.warning)

		. = ALIGN(16);
@@ -124,3 +138,9 @@ SECTIONS 
	STABS_DEBUG

	.comment 0 : { *(.comment) }

}



/*

 * The HYP init code can't be more than a page long.

 */

ASSERT(((__hyp_idmap_text_start + PAGE_SIZE) > __hyp_idmap_text_end),

       "HYP init code too big")