[v3] powerpc/powernv: Add ppc_pci_reset_phbs parameter to issue a PHB reset

[Michael Ellerman]

On Fri, 2017-11-17 at 18:58:59 UTC, "Guilherme G. Piccoli" wrote:
> During a kdump kernel boot in PowerPC, we request a reset of the PHBs
> to the FW. It makes sense, since if we are booting a kdump kernel it
> means we had some trouble before and we cannot rely in the adapters'
> health; they could be in a bad state, hence the reset is needed.
> 
> But this reset is useful not only in kdump - there are situations,
> specially when debugging drivers, that we could break an adapter in
> a way it requires such reset. One can tell to just go ahead and
> reboot the machine, but happens that many times doing kexec is much
> faster, and so preferable than a full power cycle.
> 
> This patch adds the ppc_pci_reset_phbs parameter to perform such reset.
> 
> Signed-off-by: Guilherme G. Piccoli <gpiccoli at linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/45baee1416a0086dccaa8a94c70e67

cheers