[Skiboot] [PATCH] phb4: Dump CAPP error registers when it asserts link down

[Russell Currey]

On Mon, 2018-01-08 at 17:23 +0530, Vaibhav Jain wrote:
> This patch introduces a new function phb4_dump_app_err_regs() that
> dumps CAPP error registers in case the PEC nestfir register indicates
> that the fence was due to a CAPP error (BIT-24).
> 
> Contents of these registers are helpful in diagnosing CAPP
> issues. Registers that are dumped in phb4_dump_app_err_regs() are:
> 
> * CAPP FIR Register
> * CAPP APC Master Error Report Register
> * CAPP Snoop Error Report Register
> * CAPP Transport Error Report Register
> * CAPP TLBI Error Report Register
> * CAPP Error Status and Control Register
> 
> Signed-off-by: Vaibhav Jain <vaibhav at linux.vnet.ibm.com>

Acked-by: Russell Currey <ruscur at russell.cc>