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Re: [PATCH v12 09/15] vpci/header: program p2m with guest BAR view
- To: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 15 Jan 2024 10:07:07 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
- Delivery-date: Mon, 15 Jan 2024 09:07:18 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 12.01.2024 16:06, Roger Pau Monné wrote:
> On Tue, Jan 09, 2024 at 04:51:24PM -0500, Stewart Hildebrand wrote:
>> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
>> + /*
>> + * Make sure that the guest set address has the same page offset
>> + * as the physical address on the host or otherwise things won't
>> work as
>> + * expected.
>> + */
>> + if ( PAGE_OFFSET(bar->guest_addr) != PAGE_OFFSET(bar->addr) )
>> + {
>> + gprintk(XENLOG_G_WARNING,
>> + "%pp: Can't map BAR%d because of page offset mismatch:
>> %lx vs %lx\n",
> ^u
>
> Also when using the x modifier it's better to also use # to print the
> 0x prefix. You can also reduce the length of the message using
> s/because of/due to/ IMO:
>
> %pp: Can't map BAR%u due to offset mismatch: %lx vs %lx
Or even
%pp: can't map BAR%u - offset mismatch: %lx vs %lx
? Note also my use of lower-case 'c', which brings this log message in
line with all pre-existing (prior to the whole series) vPCI log messages
starting with "%pp: " (when not limiting to thus-prefixed there are a
couple of "Failed to ..." outliers).
Jan
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