Messages in this thread | | | From | Paul Durrant <> | Date | Wed, 25 Jan 2012 15:23:28 +0000 | Subject | RE: [Xen-devel] Regressions in v3.3-rc1 introduced by "xen/granttable: Grant tables V2 implementation" |
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> -----Original Message----- > From: Paul Durrant > Sent: 25 January 2012 07:17 > To: Ian Campbell; Konrad Rzeszutek Wilk > Cc: annie.li@oracle.com; xen-devel@lists.xensource.com; linux- > kernel@vger.kernel.org > Subject: RE: [Xen-devel] Regressions in v3.3-rc1 introduced by > "xen/granttable: Grant tables V2 implementation" > > > -----Original Message----- > > > > On HVM for gnttab_shared we make an add_to_physmap call with > > XENMAPSPACE_grant_table (in gnttab_map). I don't see any support call > > to do something similar for the status array though and I don't see a > > XENMAPSPACE_* specifically for that case either in the hypervisor either. > > > > There is no map-space for the status pages. To map them you use the > standard map space but OR a bit (top bit IIRC) into in the idx. It's a bit icky, > but that's how it is. >
I fixed a bug in xen-unstable a few weeks back that prevented mapping of the status frames so I guess the bug is possibly due to trying to use gnttab 2 on 4.1, where this bug would hit, but failing to check the return code from the status mapping hypercall?
Paul
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