[PATCH] selftests/powerpc: add test to verify rfi flush across a system call

[Naveen N. Rao]

Michael Ellerman wrote:
> "Naveen N. Rao" <naveen.n.rao at linux.vnet.ibm.com> writes:
> 
>> diff --git a/tools/testing/selftests/powerpc/utils.c b/tools/testing/selftests/powerpc/utils.c
>> index d46916867a6f..c6b1d20ed3ba 100644
>> --- a/tools/testing/selftests/powerpc/utils.c
>> +++ b/tools/testing/selftests/powerpc/utils.c
>> @@ -104,3 +111,149 @@ int pick_online_cpu(void)
>>  	printf("No cpus in affinity mask?!\n");
>>  	return -1;
>>  }
> ...
>> +
>> +static void sigill_handler(int signr, siginfo_t *info, void *unused)
>> +{
>> +	static int warned = 0;
>> +	ucontext_t *ctx = (ucontext_t *)unused;
>> +	unsigned int *pc = (unsigned int *)ctx->uc_mcontext.gp_regs[PT_NIP];
> 
> The above doesn't work on 32-bit, and this code is sometimes built 32-bit.
> 
> For an example of how to handle 32 and 64-bit, see eg:
> 
>   tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c

Thanks. I'll post a v2 that addresses the 32-bit build issue.

- Naveen