[PATCH next] ARM: virt: fix build of hyp-stub

Compile hyp-stub explicitly for arm v7-a. This fixes the following build
errors:

  arch/arm/kernel/hyp-stub.S: Assembler messages:
  arch/arm/kernel/hyp-stub.S:168: Error: selected processor does not support `ubfx r7,r7,#28,#4' in ARM mode
  arch/arm/kernel/hyp-stub.S:176: Error: selected processor does not support `isb' in ARM mode

Signed-off-by: Vincent Stehl? <redacted>
Cc: Jean-Philippe Brucker <redacted>
Cc: Marc Zyngier <redacted>
Cc: Russell King <redacted>
---


Hi,

This can be seen with linux next-20160218 and arm e.g. allmodconfig.

Best regards,

V.


 arch/arm/kernel/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 2c5f160..15684c5 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile

@@ -88,6 +88,8 @@ obj-$(CONFIG_DEBUG_LL)	+= debug.o
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 
 obj-$(CONFIG_ARM_VIRT_EXT)	+= hyp-stub.o
+AFLAGS_hyp-stub.o		:=-Wa,-march=armv7-a
+
 ifeq ($(CONFIG_ARM_PSCI),y)
 obj-$(CONFIG_SMP)		+= psci_smp.o
 endif

-- 
2.7.0

Hi Vincent,

On Fri, Feb 19, 2016 at 12:31:17AM +0100, Vincent Stehl? wrote:

Compile hyp-stub explicitly for arm v7-a. This fixes the following build
errors:

  arch/arm/kernel/hyp-stub.S: Assembler messages:
  arch/arm/kernel/hyp-stub.S:168: Error: selected processor does not support `ubfx r7,r7,#28,#4' in ARM mode
  arch/arm/kernel/hyp-stub.S:176: Error: selected processor does not support `isb' in ARM mode

Signed-off-by: Vincent Stehl? <redacted>
Cc: Jean-Philippe Brucker <redacted>
Cc: Marc Zyngier <redacted>
Cc: Russell King <redacted>
---


Hi,

This can be seen with linux next-20160218 and arm e.g. allmodconfig.

Thanks for doing this. I just posted my fix to the patch system, before
seeing yours (it also requires change in boot/compressed/Makefile -
hyp-stub is built twice). See the previous discussion about this issue
here: http://thread.gmane.org/gmane.linux.ports.arm.kernel/479256

Thanks,
Jean-Philippe