Re: [Xen-devel] [PATCHl] localtime basis for paravirtualized guests

["Bruce Rogers" <BROGERS@xxxxxxxxxx>]

Attached please find a patch (against unstable tree) which provides
some localtime support for paravirtualized guests.  It is quite
minimal
in its approach, satisfying the purposes of the paravirtualized
NetWare operating system as well as any others that expect the time
base to be provided in localtime.

I should point out however that this by itself does not allow a
localtime
time base to be used for xenolinux.  That support would require
additional
changes to Linux (eg a Xen aware implementation of /dev/rtc & etc.),
and
should probably be based on a more flexible and thorough implementation
of
non-UTC guest time bases than what this patch provides.  Nevertheless,
this patch is functionaly equivalent to what is being done SLES 10's
Xen
implementation (but with SLES10 being based on testing tree), so I felt
it
should be submitted as is, with a more comprehensive approach
submitted
separately.

Signed-off-by: Bruce Rogers <brogers@xxxxxxxxxx>

- Bruce

>>> On 4/5/2006 at 8:03 AM, in message
<268cbf4ac7bb43efa0994df4a124a19d@xxxxxxxxxxxx>, Keir Fraser
<Keir.Fraser@xxxxxxxxxxxx> wrote:

> On 31 Mar 2006, at 21:22, Bruce Rogers wrote:
> 
>> This patch allows the localtime parameter to be used for 
>> para-virtualized guests.
>> Some paravirtualized guests may need to start with a local time
basis 
>> instead of UTC.
>> This patch provides for that need.  Please review and apply.
> 
> I've just checked in a patch to provide a clean wallclock update 
> interface from common Xen code. Please re-send based on that patch. 
> Your dom0_op implementation should modify d->time_offset_seconds 
> directly and then call update_domain_wallclock_time(d).
> 
> Apart from that, the time_offset_seconds field in dom0_op.h should be

> type int32_t (we don't use s32 in public headers).
> 
>   -- Keir
> 
> 
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xen-localtime.diff
Description: Binary data

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