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

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 25 May 2006, at 03:51, Dong, Eddie wrote:

> 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.
This patch is very large. Most of it seems to deal with this new 
abstraction of 'periodic time'. What does that mean, and why is it 
useful?
 -- Keir


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