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Re: [PATCH 2/2] drivers/char: Use sub-page ro API to make just xhci dbc cap RO
- To: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 29 Mar 2023 12:28:33 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 29 Mar 2023 10:28:54 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 29.03.2023 12:21, Marek Marczykowski-Górecki wrote:
> Making subpage_mmio_ro_add() to call mmio_ro_ranges() on its own,
> together with Roger's suggestion of using ioremap() internally instead
> of using fixmap would make it a bit nicer (if mapping the same page with
> ioremap() in addition to fixmap isn't a problem).
I don't see any problem there, as long as we don't gain many of these
(at which point wasting address space may become an issue).
Jan
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