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".
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
arch/arm64/kernel/vmlinux.lds.S | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index 3fae2be..9635391 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -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")
--
1.8.2.3
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