On 07/02/2012 07:30 AM, Alexander Graf wrote:
>
> On 22.06.2012, at 22:06, Stuart Yoder wrote:
>
>> From: Liu Yu-B13201 <yu....@freescale.com>
>>
>> Signed-off-by: Liu Yu <yu....@freescale.com>
>> Signed-off-by: Stuart Yoder <stuart.yo...@freescale.com>
>> ---
>> -v11: no changes
>>
>> arch/powerpc/include/asm/epapr_hcalls.h | 22 +++++++++---------
>> arch/powerpc/include/asm/fsl_hcalls.h | 36 +++++++++++++++---------------
>> 2 files changed, 29 insertions(+), 29 deletions(-)
>>
>> diff --git a/arch/powerpc/include/asm/epapr_hcalls.h
>> b/arch/powerpc/include/asm/epapr_hcalls.h
>> index 833ce2c..b8d9445 100644
>> --- a/arch/powerpc/include/asm/epapr_hcalls.h
>> +++ b/arch/powerpc/include/asm/epapr_hcalls.h
>> @@ -195,7 +195,7 @@ static inline unsigned int ev_int_set_config(unsigned
>> int interrupt,
>> r5 = priority;
>> r6 = destination;
>>
>> - __asm__ __volatile__ ("sc 1"
>> + asm volatile("bl epapr_hypercall_start"
>> : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6)
>> : : EV_HCALL_CLOBBERS4
>
> Hrm. ePAPR hypercalls are allowed to clobber lr, right? But our hypercall
> entry code depends on lr staying alive:
ePAPR 1.1 says LR is nonvolatile.
-Scott
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