powerpc/64s: Wire up cpu_show_meltdown()

[Michael Ellerman]

On Tue, 2018-01-16 at 11:24:01 UTC, Michael Ellerman wrote:
> The recent commit 87590ce6e373 ("sysfs/cpu: Add vulnerability folder")
> added a generic folder and set of files for reporting information on
> CPU vulnerabilities. One of those was for meltdown:
> 
>   /sys/devices/system/cpu/vulnerabilities/meltdown
> 
> This commit wires up that file for 64-bit Book3S powerpc.
> 
> For now we default to "Vulnerable" unless the RFI flush is enabled.
> That may not actually be true on all hardware, further patches will
> refine the reporting based on the CPU/platform etc. But for now we
> default to being pessimists.
> 
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Applied to powerpc fixes.

https://git.kernel.org/powerpc/c/fd6e440f20b1a4304553775fc55938

cheers