arm64: Switch to adrp for loading the stub vectors

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>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 5a76e3a..fddda85 100644 (file)
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -341,7 +341,8 @@ 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 */