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powerpc: tracing: Give hypervisor call tracepoints access to arguments

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While most users of the hcall tracepoints will only want the opcode
and return code, some will want all the arguments.  To avoid the
complexity of using varargs we pass a pointer to the register save
area, which contains all the arguments.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Anton Blanchard
2009-10-26 18:51:09 +00:00
committed by Paul Mackerras
parent c8cd093a6e
commit 6f26353ca2
4 changed files with 34 additions and 20 deletions
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9
arch/powerpc/platforms/pseries/lpar.c
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@@ -683,13 +683,14 @@ void hcall_tracepoint_unregfunc(void)
hcall_tracepoint_refcount--;
}
void __trace_hcall_entry(unsigned long opcode)
void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
{
trace_hcall_entry(opcode);
trace_hcall_entry(opcode, args);
}
void __trace_hcall_exit(long opcode, unsigned long retval)
void __trace_hcall_exit(long opcode, unsigned long retval,
unsigned long *retbuf)
{
trace_hcall_exit(opcode, retval);
trace_hcall_exit(opcode, retval, retbuf);
}
#endif