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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: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2012-12-07 18:40:43 +00:00
parent 363116073a
commit 2240bbb697
1 changed files with 20 additions and 0 deletions
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20
arch/arm64/kernel/vmlinux.lds.S
View File

@ -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")