[pull][bionic] add ARM64 RAS extension and SDEI interface.

[Seth Forshee]

On Fri, Mar 09, 2018 at 10:52:58PM -0600, Manoj Iyer wrote:
> 
> Please consider the following pull request for ARM64 Software Delegated
> Exception Interface (SDEI) cleanly cherry-picked, and RAS extension patches
> backported to bionic from latest 4.16-rc. A test kernel is available in
> ppa:manjo/uose2.
> 
> The kernel was touch tested on QDF2400 ARM64 server platform. On the
> hisilicon D06 platform I ran KVM start stop tests, created 20VMs and
> start/stop the VMs 10 times. The testcase can be found here:
> https://code.launchpad.net/~manjo/+git/kvm-testing

The changes for arm here are substantial, though a good chunk of it is
limited to new driver code which is only used when firmware support is
present. I think that given the testing you've done and that it will go
through our automated testing we can apply this once we have the
additional testing for the prerequisite series.

Thanks,
Seth