Eric Auger 174178fed3
KVM: arm/arm64: add irqfd support ...
This patch enables irqfd on arm/arm64.
Both irqfd and resamplefd are supported. Injection is implemented
in vgic.c without routing.
This patch enables CONFIG_HAVE_KVM_EVENTFD and CONFIG_HAVE_KVM_IRQFD.
KVM_CAP_IRQFD is now advertised. KVM_CAP_IRQFD_RESAMPLE capability
automatically is advertised as soon as CONFIG_HAVE_KVM_IRQFD is set.
Irqfd injection is restricted to SPI. The rationale behind not
supporting PPI irqfd injection is that any device using a PPI would
be a private-to-the-CPU device (timer for instance), so its state
would have to be context-switched along with the VCPU and would
require in-kernel wiring anyhow. It is not a relevant use case for
irqfds.
Signed-off-by: Eric Auger <eric.auger@linaro.org >
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org >
Acked-by: Marc Zyngier <marc.zyngier@arm.com >
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org >
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Eric Auger
174178fed3
