[Xen-devel] MSR switching in xen?

[Daniel Stodden <stodden@xxxxxxxxxx>]

hi.

does xen provide infrastructure for switching MSR state between
different guests?

i'm particularly thinking about hardware performance counters, but there
may be additional ones, e.g. tsc (questionable, since not guaranteed to
be writeable), debug extensions,...

are there any opinions or have there be decisions regarding access to
performance counters in unprivileged guests at all?  i'm aware of
DOM0_MSR for privileged ones, but haven't found much beyond that, yet.

regards,
daniel

-- 
Daniel Stodden
LRR     -      Lehrstuhl fÃr Rechnertechnik und Rechnerorganisation
Institut fÃr Informatik der TU MÃnchen             D-85748 Garching
http://www.lrr.in.tum.de/~stodden         mailto:stodden@xxxxxxxxxx
PGP Fingerprint: F5A4 1575 4C56 E26A 0B33  3D80 457E 82AE B0D8 735B

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