Messages in this thread | | | Subject | Re: [PATCH] xen/arm: pfn_to_mfn and mfn_to_pfn return the argument if nothing is in the p2m | From | Ian Campbell <> | Date | Mon, 11 Nov 2013 13:03:47 +0000 |
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On Mon, 2013-11-11 at 12:50 +0000, Stefano Stabellini wrote: > Some common Xen drivers, like balloon.c, call pfn_to_mfn and mfn_to_pfn > even for autotranslate guests, expecting the argument back. > The following commit broke these drivers by changing the behavior of > pfn_to_mfn and mfn_to_pfn: > > commit 4a19138c6505e224d9f4cc2fe9ada9188d7100ea > Author: Stefano Stabellini <stefano.stabellini@eu.citrix.com> > Date: Thu Oct 17 16:22:27 2013 +0000 > > arm/xen,arm64/xen: introduce p2m > > They now return INVALID_P2M_ENTRY if Linux doesn't actually know what is > the mfn backing a pfn or what is the pfn corresponding to an mfn. > Fix the regression by switching to the old behavior. > > Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
I tripped over this on Friday and my local hack was identical, hence also:
Tested-by: Ian Campbell <ian.campbell@citrix.com>
Ian.
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