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Date: Tue, 12 Jan 2021 13:17:32 +0100 From: Jürgen Groß <jgross@...e.com> To: Roger Pau Monne <roger.pau@...rix.com>, linux-kernel@...r.kernel.org Cc: stable@...r.kernel.org, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Stefano Stabellini <sstabellini@...nel.org>, Paul Durrant <paul.durrant@...rix.com>, amc96@....ac.uk, andrew.cooper3@...rix.com, xen-devel@...ts.xenproject.org Subject: Re: [PATCH v2] xen/privcmd: allow fetching resource sizes On 12.01.21 12:53, Roger Pau Monne wrote: > Allow issuing an IOCTL_PRIVCMD_MMAP_RESOURCE ioctl with num = 0 and > addr = 0 in order to fetch the size of a specific resource. > > Add a shortcut to the default map resource path, since fetching the > size requires no address to be passed in, and thus no VMA to setup. > > This is missing from the initial implementation, and causes issues > when mapping resources that don't have fixed or known sizes. > > Signed-off-by: Roger Pau Monné <roger.pau@...rix.com> > Cc: stable@...r.kernel.org # >= 4.18 Reviewed-by: Juergen Gross <jgross@...e.com> Juergen Download attachment "OpenPGP_0xB0DE9DD628BF132F.asc" of type "application/pgp-keys" (3092 bytes) Download attachment "OpenPGP_signature" of type "application/pgp-signature" (496 bytes)
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