lp:~kamalmostafa/ubuntu/+source/linux-aws/+git/focal

Author: Andra Paraschiv
Author Date: 2020-09-21 12:17:32 UTC

MAINTAINERS: Add entry for the Nitro Enclaves driver

BugLink: https://bugs.launchpad.net/bugs/1903087

Add entry in the MAINTAINERS file for the Nitro Enclaves files such as
the documentation, the header files, the driver itself and the user
space sample.

Changelog

v9 -> v10

* Update commit message to include the changelog before the SoB tag(s).

v8 -> v9

* Update the location of the documentation, as it has been moved to the
  "virt" directory.

v7 -> v8

* No changes.

v6 -> v7

* No changes.

v5 -> v6

* No changes.

v4 -> v5

* No changes.

v3 -> v4

* No changes.

v2 -> v3

* Update file entries to be in alphabetical order.

v1 -> v2

* No changes.

Reviewed-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Link: https://lore.kernel.org/r/20200921121732.44291-19-andraprs@amazon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit e82ed736ad2d2dddf1384fc4c8a0f26021af04fe)
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

Author: Andrea Righi
Author Date: 2020-10-20 09:32:34 UTC

UBUNTU: Ubuntu-aws-5.4.0-1029.30

Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

Author: Steven Price
Author Date: 2019-10-21 15:28:23 UTC

arm64: Retrieve stolen time as paravirtualized guest

BugLink: https://bugs.launchpad.net/bugs/1889282

Enable paravirtualization features when running under a hypervisor
supporting the PV_TIME_ST hypercall.

For each (v)CPU, we ask the hypervisor for the location of a shared
page which the hypervisor will use to report stolen time to us. We set
pv_time_ops to the stolen time function which simply reads the stolen
value from the shared page for a VCPU. We guarantee single-copy
atomicity using READ_ONCE which means we can also read the stolen
time for another VCPU than the currently running one while it is
potentially being updated by the hypervisor.

Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
(cherry picked from commit e0685fa228fdaf386f82ac0d64b2d6f3e0ddd588)
Signed-off-by: Kamal Mostafa <kamal@canonical.com>