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Re: [PATCH] x86/shadow: Delete the none.c dummy file
- To: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 9 Feb 2026 17:01:16 +0000
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Jan Beulich <jbeulich@xxxxxxxx>, Tim Deegan <tim@xxxxxxx>
- Delivery-date: Mon, 09 Feb 2026 17:01:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 09/02/2026 4:20 pm, Alejandro Vallejo wrote:
> On Mon Feb 9, 2026 at 4:55 PM CET, Roger Pau Monné wrote:
>> On Mon, Feb 09, 2026 at 04:35:04PM +0100, Alejandro Vallejo wrote:
>>> On Mon Feb 9, 2026 at 3:42 PM CET, Roger Pau Monné wrote:
>>>> PV needs shadow for migration.
>>> shadow in the sense of shadow paging? So PV-only + !SHADOW means migrations
>>> are
>>> impossible? Why can't Xen operate on the PV pagetables rather than using
>>> shadow?
This question doesn't appear to have been answered.
Because PV guests can read their own pagetabes, and need to not see an
absence of _PAGE_RW where it has a writeable page.
~Andrew
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