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Re: [PATCH v2 2/2] x86/dom0: attempt to fixup p2m page-faults for PVH dom0
- To: Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 18 Feb 2025 16:58:20 +0100
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- Cc: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Community Manager <community.manager@xxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- Delivery-date: Tue, 18 Feb 2025 15:58:26 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 18.02.2025 16:44, Roger Pau Monné wrote:
> On Tue, Feb 18, 2025 at 03:35:04PM +0100, Roger Pau Monne wrote:
>> --- a/docs/misc/xen-command-line.pandoc
>> +++ b/docs/misc/xen-command-line.pandoc
>> @@ -822,7 +822,8 @@ Specify the bit width of the DMA heap.
>>
>> ### dom0
>> = List of [ pv | pvh, shadow=<bool>, verbose=<bool>,
>> - cpuid-faulting=<bool>, msr-relaxed=<bool> ] (x86)
>> + cpuid-faulting=<bool>, msr-relaxed=<bool>,
>> + pf-fixup=<bool> ] (x86)
>>
>> = List of [ sve=<integer> ] (Arm64)
>>
>> @@ -883,6 +884,19 @@ Controls for how dom0 is constructed on x86 systems.
>>
>> If using this option is necessary to fix an issue, please report a bug.
>>
>> +* The `pf-fixup` boolean is only applicable when using a PVH dom0 and
>> + defaults to false.
>
> I'm considering whether the default should instead be true, so that
> PVH is closer to what which regions a classic PV dom0 gets access to.
I was wondering about this too, but then thought that we may want to do
this in a separate step, once we've had some more coverage.
Jan
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