[Xen-devel][PATCH] Multiple HVM time device model support in HV

["Dong, Eddie" <eddie.dong@xxxxxxxxx>]

This patch targets to support multiple HVM time device models coming
soon.
        1: Adopt an abstract layer for periodic time on top of different
HV time device models like PIT, RTC and ACPI time.
        2: Extract VMM knowledge from PIT DM code and keep close with
qemu for easy maintain in future.
        3: Use guest time (TSC) to drive PIT CLK that helps us to remove
a lot of extra logic previously introduced to convert from host time to
guest time.
        4: Some cleanup for SMP code like move cache_tsc_offset to per
VP.

Signed-off-by: Eddie Dong <eddie.dong@xxxxxxxxx>

Attachment: pit2_10144.patch
Description: pit2_10144.patch

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