Hi,
On 02/10/2023 16:11, Roger Pau Monne wrote:
From: Jan Beulich <[email protected]>
The registration by virtual/linear address has downsides: At least on
x86 the access is expensive for HVM/PVH domains. Furthermore for 64-bit
PV domains the area is inaccessible (and hence cannot be updated by Xen)
when in guest-user mode.
Introduce a new vCPU operation allowing to register the runstate area by
guest-physical address.
An at least theoretical downside to using physically registered areas is
that PV then won't see dirty (and perhaps also accessed) bits set in its
respective page table entries.
Signed-off-by: Jan Beulich <[email protected]>
Reviewed-by: Roger Pau Monné <[email protected]>
Acked-by: Julien Grall <[email protected]>
Cheers,
--
Julien Grall
