Upstream: no
In the upcoming patches, we will support for rebooting CSV2 guests. In
order to support rebooting CSV2 guest, we will set
vcpu->arch.guest_state_protected to false, before VMRUN, so that VMM
can initialize vCPU states and VMSA, and then set
vcpu->arch.guest_state_protected back to true to bypass unexpected
behaviour in KVM. Besides, cache flush is necessary during rebooting a
memory encrypted guest.
Introduce control_{pre,post}_system_reset ioctl interfaces to support
rebooting memory encrypted guests correctly.
Signed-off-by: hanliyang <hanliyang@hygon.cn>
a717c0e01d