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Re: [PATCH v6 03/19] xen/riscv: introduce VMID allocation and manegement
- To: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 9 Dec 2025 11:52:01 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, Bob Eshleman <bobbyeshleman@xxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 09 Dec 2025 10:52:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 09.12.2025 11:35, Oleksii Kurochko wrote:
> On 12/8/25 5:31 PM, Jan Beulich wrote:
>> On 24.11.2025 13:33, Oleksii Kurochko wrote:
>>> --- a/docs/misc/xen-command-line.pandoc
>>> +++ b/docs/misc/xen-command-line.pandoc
>>> @@ -3096,3 +3096,12 @@ the hypervisor was compiled with `CONFIG_XSM`
>>> enabled.
>>> * `silo`: this will deny any unmediated communication channels between
>>> unprivileged VMs. To choose this, the separated option in kconfig must
>>> also
>>> be enabled.
>>> +
>>> +### vmid (RISC-V)
>>> +> `= <boolean>`
>>> +
>>> +> Default: `true`
>>> +
>>> +Permit Xen to use Virtual Machine Identifiers. This is an optimisation
>>> which
>>> +tags the TLB entries with an ID per vcpu. This allows for guest TLB flushes
>>> +to be performed without the overhead of a complete TLB flush.
>> Please obey to the alphabetic sorting within this file.
>
> Do we have a definition of alphabetical order? In xen-command-line.pandoc
> there is
> `### vm-notify-window (Intel)`, and I would expect `### vmid` to appear
> before it.
> Am I right? So the ordering should be: letters first, then numbers, then
> special
> characters?
This particular detail of sorting isn't well-defined, I don't think. If in
doubt,
I'd use C locale sorting rules.
Jan
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