On Wed, Jan 28, 2015 at 08:22:41PM +0000, Stephen Boyd wrote:

On 01/21/15 11:48, Stephen Boyd wrote:

quoted

Currently I can't boot up secondary CPUs on qcom platforms when I
compile the kernel for THUMB2 mode. This is because we always enter
the kernel in ARM mode regardless of what mode the kernel is compiled
for. This patchset adds a small wrapper to secondary_startup() called
secondary_startup_arm() that allows us to switch into THUMB2 mode if
we need to. If the kernel is compiled for ARM mode it shouldn't have
any effect.

Stephen Boyd (2):
  ARM: Add a secondary_startup that assumes ARM mode
  ARM: qcom: Use secondary_startup_arm()

 arch/arm/kernel/head.S       | 7 +++++++
 arch/arm/mach-qcom/platsmp.c | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

Any comments here? Perhaps I can send this through the patch tracker?

FWIW, they look fine to me.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

I guess the reason it works fine on other platforms is because the
secondary start address we pass to firmware has bit 0 set and this
causes the jump to the kernel in Thumb-2 mode.

Catalin