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Date: Tue, 12 Jan 2021 20:09:09 +0000 From: Andrew Cooper <amc96@....ac.uk> To: Jürgen Groß <jgross@...e.com>, 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>, andrew.cooper3@...rix.com, xen-devel@...ts.xenproject.org Subject: Re: [PATCH v2] xen/privcmd: allow fetching resource sizes On 12/01/2021 12:17, Jürgen Groß wrote: > 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> Tested-by: Andrew Cooper <andrew.cooper3@...rix.com>
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