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ARM: virt: Avoid bx instruction for compatibility with <=ARMv4

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Non-T variants of ARMv4 do not support the bx instruction.

However, __hyp_stub_install is always called from the same
instruction set used to build the bulk of the kernel, so bx should
not be necessary.

This patch uses the traditional "mov pc" instead of bx.

Cc: <stable@vger.kernel.org>
Signed-off-by: Dave Martin <dave.martin@linaro.org>
[will: fixed up remaining bx instruction]
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Dave Martin 2012-11-30 11:56:05 +00:00 committed by Will Deacon
parent 9931faca02
commit a4a12e008e
1 changed files with 3 additions and 3 deletions
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6
arch/arm/kernel/hyp-stub.S
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@ -99,7 +99,7 @@ ENTRY(__hyp_stub_install_secondary)
* immediately.
*/
compare_cpu_mode_with_primary r4, r5, r6, r7
bxne lr
movne pc, lr
/*
* Once we have given up on one CPU, we do not try to install the
@ -111,7 +111,7 @@ ENTRY(__hyp_stub_install_secondary)
*/
cmp r4, #HYP_MODE
bxne lr @ give up if the CPU is not in HYP mode
movne pc, lr @ give up if the CPU is not in HYP mode
/*
* Configure HSCTLR to set correct exception endianness/instruction set
@ -200,7 +200,7 @@ ENDPROC(__hyp_get_vectors)
@ fall through
ENTRY(__hyp_set_vectors)
__HVC(0)
bx lr
mov pc, lr
ENDPROC(__hyp_set_vectors)
#ifndef ZIMAGE