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Re: [PATCH for <= 5.4] xen/privcmd: allow fetching resource sizes
- To: Greg KH <greg@xxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 26 Jan 2021 17:22:59 +0000
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- Cc: <stable@xxxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Delivery-date: Tue, 26 Jan 2021 17:23:26 +0000
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On 20/01/2021 11:03, Greg KH wrote:
> On Mon, Jan 18, 2021 at 03:04:26PM +0100, Roger Pau Monne wrote:
>> commit ef3a575baf53571dc405ee4028e26f50856898e7 upstream
>>
>> 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@xxxxxxxxxx>
>> Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
>> Tested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
>> Cc: stable@xxxxxxxxxxxxxxx # >= 4.18
>> Link: https://lore.kernel.org/r/20210112115358.23346-1-roger.pau@xxxxxxxxxx
>> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
>> ---
>> Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
>> Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
>> ---
>> drivers/xen/privcmd.c | 25 +++++++++++++++++++------
>> 1 file changed, 19 insertions(+), 6 deletions(-)
> Now queued up, thanks.
Hello,
The upstream version of this patch was queued against 5.4 and 4.19, both
of which suffered a patch conflict, and are fixed by this version.
Was it an oversight that this version didn't get queued for 4.19?
Thanks,
~Andrew
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