Messages in this thread | | | Date | Fri, 15 Feb 2013 14:37:40 +1100 | From | Paul Mackerras <> | Subject | Re: [PATCH 3/4] powerpc: preparing to support real mode optimization |
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On Mon, Feb 11, 2013 at 11:12:42PM +1100, aik@ozlabs.ru wrote: > From: Alexey Kardashevskiy <aik@ozlabs.ru> > > he current VFIO-on-POWER implementation supports only user mode > driven mapping, i.e. QEMU is sending requests to map/unmap pages. > However this approach is really slow in really fast hardware so > it is better to be moved to the real mode. > > The patch adds an API to increment/decrement page counter as > get_user_pages API used for user mode mapping does not work > in the real mode. > > CONFIG_SPARSEMEM_VMEMMAP and CONFIG_FLATMEN are supported. > > Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> > Cc: David Gibson <david@gibson.dropbear.id.au> > ---
The names are slightly odd, in that they include "vmemmap_" but exist and work in the flatmem case as well. Apart from that...
Reviewed-by: Paul Mackerras <paulus@samba.org>
Paul.
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