[SRU][PULL][G/aws] config changes to fix hibernation on Xen instance types

[Andrea Righi]

BugLink: https://bugs.launchpad.net/bugs/1732512
BugLink: https://bugs.launchpad.net/bugs/1879711

[Impact]

After moving to 5.8 the config for the AWS kernel has been re-generated
starting from the generic 5.8 kernel. However, in the process, we missed
some important config options that are required to properly support
hibernation, especially on Xen instance types.

Re-align the config starting from a 5.4 kernel and report explicitly in
the annotations file the relevant config options required by
hibernation.

Also get rid of some modules that were not enabled in 5.4 and are also
not required in 5.8. This makes the kernel smaller and allows to provide
a faster boot time.

These changes have been tested in the AWS environment using Xen and KVM
instance types. Without these config changes hibernation is currently
broken on certain instance types.

[Test case]

 - start a Xen-based instance (i.e., c4.8xlarge)
 - start a memory stress test on it
 - hibernate & resume
 - verify that the instance has been properly resumed and the memory
   stress test is still running

[Fix]

Re-align as much as possible with the config options used in 5.4 and
also get rid of some additional modules that were enabled and that are
not required.

[Regression potential]

The risk of regression is to disable certain modules/drivers that are
potentially required, but without these changes hibernation is currently
broken in many Xen instance types, so it is less risky to use these new
config options.

----------------------------------------------------------------
The following changes since commit f352dd559e7c0ab7aa8db3b91f698e4cbbfbcbe3:

  UBUNTU: Ubuntu-aws-5.8.0-1011.11 (2020-10-22 11:23:44 +0200)

are available in the Git repository at:

  git://git.launchpad.net/~arighi/ubuntu/+source/linux-aws/+git/groovy tags/aws-config-update

for you to fetch changes up to 22c3b97f3738040e278672b2d230526307ca8900:

  UBUNTU: [Config] [aws] make sure CONFIG_XEN_FBDEV_FRONTEND is disabled (2020-11-04 12:57:59 +0100)

----------------------------------------------------------------
Andrea Righi (4):
      UBUNTU: [Config] [aws] re-align configs with kernel 5.4 aws
      UBUNTU: [Config] [aws] make sure CONFIG_FB_HYPERV is disabled
      UBUNTU: [Config] [aws] make sure CONFIG_SUSPEND is disabled
      UBUNTU: [Config] [aws] make sure CONFIG_XEN_FBDEV_FRONTEND is disabled

 debian.aws/abi/5.8.0-1010.10/amd64/aws.modules |  1875 +--
 debian.aws/abi/5.8.0-1010.10/arm64/aws.modules |   969 +-
 debian.aws/config/amd64/config.common.amd64    |   163 +-
 debian.aws/config/annotations                  | 18342 +++++++++++------------
 debian.aws/config/arm64/config.common.arm64    |   163 +-
 debian.aws/config/config.common.ubuntu         |  2390 +--
 6 files changed, 9212 insertions(+), 14690 deletions(-)