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Re: Arch-neutral name for hardware interrupt support
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Tue, 2 Nov 2021 09:51:59 +0100
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Mon, Nov 01, 2021 at 10:47:26AM +0000, 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.
>
> 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?
Is this going to cover both hardware assisted interrupt
controller and assisted interrupt delivery (ie: APIC virtualization
and posted interrupts in x86 speak) or just one of them?
Thanks, Roger.
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