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KVM: arm/arm64: register irq bypass consumer on ARM/ARM64

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This patch selects IRQ_BYPASS_MANAGER and HAVE_KVM_IRQ_BYPASS
configs for ARM/ARM64.

kvm_arch_has_irq_bypass() now is implemented and returns true.
As a consequence the irq bypass consumer will be registered for
ARM/ARM64 with the forwarding callbacks:

- stop/start: halt/resume guest execution
- add/del_producer: set/unset forwarding at vgic/irqchip level

We don't have any actual support yet, so nothing gets actually
forwarded.

Acked-by: Christoffer Dall <[email protected]>
Signed-off-by: Eric Auger <[email protected]>
[maz: dropped the DEOI stuff for the time being in order to
      reduce the dependency chain, amended commit message]
Signed-off-by: Marc Zyngier <[email protected]>
Signed-off-by: Christoffer Dall <[email protected]>
This commit is contained in:
Eric Auger 2017-10-27 15:28:31 +01:00 • committed by Christoffer Dall
commit 2412405b31
3 changed files with 46 additions and 0 deletions
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3
arch/arm64/kvm/Kconfig
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@ -3,6 +3,7 @@
#
source "virt/kvm/Kconfig"
source "virt/lib/Kconfig"
menuconfig VIRTUALIZATION
bool "Virtualization"
@ -35,6 +36,8 @@ config KVM
select HAVE_KVM_MSI
select HAVE_KVM_IRQCHIP
select HAVE_KVM_IRQ_ROUTING
select IRQ_BYPASS_MANAGER
select HAVE_KVM_IRQ_BYPASS
---help---
Support hosting virtualized guest machines.
We don't support KVM with 16K page tables yet, due to the multiple