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[PATCHv6,2/8] arm64: Switch to adrp for loading the stub vectors

Message ID 1416606645-25633-3-git-send-email-lauraa@codeaurora.org (mailing list archive)
State New, archived
Headers show

Commit Message

Laura Abbott Nov. 21, 2014, 9:50 p.m. UTC 
The hyp stub vectors are currently loaded using adr. This
instruction has a +/- 1MB range for the loading address. If
the alignment for sections is changed the address may be more
than 1MB away, resulting in reclocation errors. Switch to using
adrp for getting the address to ensure we aren't affected by the
location of the __hyp_stub_vectors.

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
---
 arch/arm64/kernel/head.S | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 0a6e4f9..10f5cc0 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -331,7 +331,8 @@  CPU_LE(	movk	x0, #0x30d0, lsl #16	)	// Clear EE and E0E on LE systems
 	msr	vttbr_el2, xzr
 
 	/* Hypervisor stub */
-	adr	x0, __hyp_stub_vectors
+	adrp	x0, __hyp_stub_vectors
+	add	x0, x0, #:lo12:__hyp_stub_vectors
 	msr	vbar_el2, x0
 
 	/* spsr */