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Re: Arch-neutral name for hardware interrupt support
- To: Alistair Francis <alistair23@xxxxxxxxx>
- From: Bertrand Marquis <Bertrand.Marquis@xxxxxxx>
- Date: Tue, 2 Nov 2021 08:38:38 +0000
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Jane Malalane <jane.malalane@xxxxxxxxxx>, Bobby Eshleman <bobbyeshleman@xxxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>
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- Thread-topic: Arch-neutral name for hardware interrupt support
Hi,
> On 2 Nov 2021, at 07:16, Alistair Francis <alistair23@xxxxxxxxx> wrote:
>
> On Tue, Nov 2, 2021 at 6:33 AM Stefano Stabellini
> <sstabellini@xxxxxxxxxx> wrote:
>>
>> +Bertrand
>>
>> On Mon, 1 Nov 2021, Andrew Cooper wrote:
>>> Hello,
>>>
>>> On ARM, the GIC is a hard prerequisite for VMs.
>>>
>>> I can't remember what the state of RISCV is, but IIRC there is still
>>> some debate over how interrupts are expected to work under virt.
>
> We are getting there, the current draft is pretty stable:
> https://github.com/riscv/riscv-aia/
>
>>>
>>> On x86, the story is very different. PV have no hardware assistance,
>>> while HVM hardware assistance depends on hardware support. Therefore we
>>> want to introduce a new CDF flag so we can control the setting per
>>> domain, rather than globally as it is done now.
>>>
>>> This brings us to the question of what a suitable architecture name
>>> would be.
>>>
>>> Hardware Virtual Interrupts is a little too close to Hardware Virtual
>>> (Machine) Introspection, and Hardware Assisted Interrupts (mirroring
>>> HAP) doesn't seem great either.
>>>
>>> Thoughts / ideas / suggestions?
>>
>> Maybe "hardware-enabled virtualized interrupts"
>
> hardware-supported virtualised interrupts (HSV Interrupts)
Both propositions are ok I think but I have a preference for supported.
Cheers
Bertrand
>
> Alistair
|
