On Fri, 2015-07-10 at 11:00 +0800, Feng Wu wrote:
> Add the following x86 specific routines for irqbypass manger:
>
> - kvm_arch_irq_bypass_add_producer
> - kvm_arch_irq_bypass_del_producer
> - kvm_arch_irq_bypass_stop
> - kvm_arch_irq_bypass_resume
> - kvm_arch_irq_bypass_update
>
> Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
> ---
> arch/x86/kvm/Kconfig | 1 +
> arch/x86/kvm/x86.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 56 insertions(+)
>
> diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> index 22f6fcb..ae68f2a 100644
> --- a/arch/x86/kvm/Kconfig
> +++ b/arch/x86/kvm/Kconfig
> @@ -62,6 +62,7 @@ config KVM_INTEL
> # for perf_guest_get_msrs():
> depends on CPU_SUP_INTEL
> select IRQ_BYPASS_MANAGER
> + select HAVE_KVM_IRQ_BYPASS
> ---help---
> Provides support for KVM on Intel processors equipped with the VT
> extensions.
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index d81ac02..a59f7e3 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -49,6 +49,8 @@
> #include <linux/pci.h>
> #include <linux/timekeeper_internal.h>
> #include <linux/pvclock_gtod.h>
> +#include <linux/kvm_irqfd.h>
> +#include <linux/irqbypass.h>
> #include <trace/events/kvm.h>
>
> #define CREATE_TRACE_POINTS
> @@ -8023,6 +8025,59 @@ out:
> return ret;
> }
>
> +void kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
> + struct irq_bypass_producer *prod)
> +{
> + int ret;
> + struct kvm_kernel_irqfd *irqfd =
> + container_of(cons, struct kvm_kernel_irqfd, consumer);
> +
> + irqfd->producer = prod;
> +
> + ret = kvm_arch_update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 1);
> + WARN_ON(ret);
> +}
> +
> +void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
> + struct irq_bypass_producer *prod)
> +{
> + int ret;
> + struct kvm_kernel_irqfd *irqfd =
> + container_of(cons, struct kvm_kernel_irqfd, consumer);
> +
> + irqfd->producer = NULL;
> +
> + /*
> + * When producer of consumer is unregistered, we change back to
> + * remapped mode, so we can re-use the current implementation
> + * when the irq is masked/disabed or the consumer side (KVM
> + * int this case doesn't want to receive the interrupts.
> + */
> + ret = kvm_arch_update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 0);
> + WARN_ON(ret);
> +}
> +
> +void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons)
> +{
> +}
> +
> +void kvm_arch_irq_bypass_resume(struct irq_bypass_consumer *cons)
> +{
> +}
No need for dummy functions, these callbacks will be optional. Thanks,
Alex
> +
> +void kvm_arch_irq_bypass_update(struct irq_bypass_consumer *cons)
> +{
> + int ret;
> + struct kvm_kernel_irqfd *irqfd =
> + container_of(cons, struct kvm_kernel_irqfd, consumer);
> +
> + BUG_ON(!irqfd->producer);
> +
> + ret = kvm_arch_update_pi_irte(irqfd->kvm, irqfd->producer->irq,
> + irqfd->gsi, 1);
> + WARN_ON(ret);
> +}
> +
> EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
> EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
> EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
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