[PATCH v3 08/36] KVM: arm64: gic: Introduce interrupt type helpers

[Jonathan Cameron]

On Fri, 9 Jan 2026 17:04:41 +0000
Sascha Bischoff <Sascha.Bischoff at arm.com> wrote:

> GICv5 has moved from using interrupt ranges for different interrupt
> types to using some of the upper bits of the interrupt ID to denote
> the interrupt type. This is not compatible with older GICs (which rely
> on ranges of interrupts to determine the type), and hence a set of
> helpers is introduced. These helpers take a struct kvm*, and use the
> vgic model to determine how to interpret the interrupt ID.
> 
> Helpers are introduced for PPIs, SPIs, and LPIs. Additionally, a
> helper is introduced to determine if an interrupt is private - SGIs
> and PPIs for older GICs, and PPIs only for GICv5.
> 
> The helpers are plumbed into the core vgic code, as well as the Arch
> Timer and PMU code.
> 
> There should be no functional changes as part of this change.
> 
> Signed-off-by: Sascha Bischoff <sascha.bischoff at arm.com>
> Reviewed-by: Joey Gouly <joey.gouly at arm.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron at huawei.com>