Description: powerpc/powernv/idle: Restore AMR/UAMOR/AMOR after idle
References:
 https://www.openwall.com/lists/oss-security/2020/04/15/1
Notes:
 carnil> Support for KVM guests on POWER9 only added in v4.10-rc1.
Bugs:
upstream: released (5.2-rc1) [53a712bae5dd919521a58d7bad773b949358add0]
4.19-upstream-stable: released (4.19.116) [1855c5436fa50e8dc930b0a24c52157dceef9a54]
4.9-upstream-stable: N/A "Vulnerability introduced later with support for KVM guests on POWER9"
3.16-upstream-stable: N/A "Vulnerability introduced later with support for KVM guests on POWER9"
sid: released (5.2.6-1)
4.19-buster-security: released (4.19.118-1)
4.9-stretch-security: N/A "Vulnerability introduced later with support for KVM guests on POWER9"
3.16-jessie-security: N/A "Vulnerability introduced later with support for KVM guests on POWER9"