Already outdated :)
On 10/07/12 23:46, Alexey Kardashevskiy wrote:
> Normally when the host driver gets called via interrupt, it disables IRQ
> first, then handles it and enables back. In the case of PCI pass through,
> the actual handling is done by the guest so the host driver needs to know
> when to enable IRQ back.
>
> The patch introduces add/remove callback API and EOI initialization for
> the XICS interrupt controller.
>
> Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
> ---
> hw/xics.c | 18 ++++++++++++++++++
> hw/xics.h | 5 +++++
> 2 files changed, 23 insertions(+)
>
> diff --git a/hw/xics.c b/hw/xics.c
> index 668a0d6..de7833e 100644
> --- a/hw/xics.c
> +++ b/hw/xics.c
> @@ -170,6 +170,7 @@ struct ics_irq_state {
> int sent:1;
> int rejected:1;
> int masked_pending:1;
> + NotifierList eoi_notifier;
> };
>
> struct ics_state {
> @@ -309,6 +310,8 @@ static void ics_eoi(struct ics_state *ics, int nr)
> if (irq->type == XICS_LSI) {
> irq->sent = 0;
> }
> +
> + notifier_list_notify(&irq->eoi_notifier, NULL);
> }
>
> /*
> @@ -536,6 +539,7 @@ struct icp_state *xics_system_init(int nr_irqs)
> for (i = 0; i < nr_irqs; i++) {
> ics->irqs[i].priority = 0xff;
> ics->irqs[i].saved_priority = 0xff;
> + notifier_list_init(&ics->irqs[i].eoi_notifier);
> }
>
> ics->qirqs = qemu_allocate_irqs(ics_set_irq, ics, nr_irqs);
> @@ -552,3 +556,17 @@ struct icp_state *xics_system_init(int nr_irqs)
>
> return icp;
> }
> +
> +void xics_add_eoi_notifier(Notifier *notify, uint32_t srcno)
> +{
> + struct ics_state *ics = spapr->icp->ics;
> + struct ics_irq_state *irq = &ics->irqs[srcno - ics->offset];
> +
> + notifier_list_add(&irq->eoi_notifier, notify);
> +}
> +
> +void xics_remove_eoi_notifier(Notifier *notify)
> +{
> + notifier_remove(notify);
> +}
> +
> diff --git a/hw/xics.h b/hw/xics.h
> index 2080159..762243c 100644
> --- a/hw/xics.h
> +++ b/hw/xics.h
> @@ -27,6 +27,8 @@
> #if !defined(__XICS_H__)
> #define __XICS_H__
>
> +#include "notify.h"
> +
> #define XICS_IPI 0x2
>
> struct icp_state;
> @@ -41,4 +43,7 @@ qemu_irq xics_assign_irq(struct icp_state *icp, int irq,
>
> struct icp_state *xics_system_init(int nr_irqs);
>
> +void xics_add_eoi_notifier(Notifier *notify, uint32_t srcno);
> +void xics_remove_eoi_notifier(Notifier *notify);
> +
> #endif /* __XICS_H__ */
>
--
Alexey
