[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v2] iommu: Elaborate the usage of RMRR specification on the command line
On Thu, Feb 23, 2017 at 11:03:55AM -0600, Venu Busireddy wrote: > As some users have suggested, elaborate the usage of RMRR specification > on the command line, and provide a usage example. > > Also, always treat the specified page numbers as hexadecimal values. > > Signed-off-by: Venu Busireddy <venu.busireddy@xxxxxxxxxx> Thanks! Just a minor comment, apart from that: Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> > --- > > Changes in v2: > - Provide a better usage example. > - Treat input page numbers as hexadecimal values. > > docs/misc/xen-command-line.markdown | 10 ++++++++++ > xen/drivers/passthrough/vtd/dmar.c | 4 ++-- > 2 files changed, 12 insertions(+), 2 deletions(-) > > diff --git a/docs/misc/xen-command-line.markdown > b/docs/misc/xen-command-line.markdown > index 3acbb33..a035c3f 100644 > --- a/docs/misc/xen-command-line.markdown > +++ b/docs/misc/xen-command-line.markdown > @@ -1406,6 +1406,16 @@ If segment of the first device is not specified, > segment zero will be used. > If other segments are not specified, first device segment will be used. > If a segment is specified for other than the first device and it does not > match > the one specified for the first one, an error will be reported. > + > +'start' and 'end' values are page numbers (not full physical addresses), > +in hexadecimal format (can optionally be preceded by "0x"). > + > +Usage example: If device 0:0:1d.0 requires one page (0xd5d45) to be > +reserved, and device 0:0:1a.0 requires three pages (0xd5d46 thru 0xd5d48) > +to be reserved, one usage would be: > + > +rmrr=d5d45=0:0:1d.0;0xd5d46-0xd5d48=0:0:1a.0 An example with multiple devices would also be nice, maybe something like: rmrr=d5d45=0:0:1d.0,0:0:1f.0;0xd5d46-0xd5d48=0:0:1a.0 Roger. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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