Re: [Qemu-devel] [PATCH 6/6] xics: implement xics_ics_free()

[Alexander Graf <agraf@suse.de>]

On 05/07/2014 08:01 AM, Alexey Kardashevskiy wrote:
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> ---
>   hw/intc/xics.c        | 24 ++++++++++++++++++++++++
>   include/hw/ppc/xics.h |  1 +
>   trace-events          |  2 ++
>   3 files changed, 27 insertions(+)
>
> diff --git a/hw/intc/xics.c b/hw/intc/xics.c
> index faf304c..2316519 100644
> --- a/hw/intc/xics.c
> +++ b/hw/intc/xics.c
> @@ -755,6 +755,30 @@ int xics_alloc_block(XICSState *icp, int server, int num, bool lsi, bool align)
>       return first + ics->offset;
>   }
>   
> +static void ics_free(ICSState *ics, int srcno, int num)
> +{
> +    int i;
> +
> +    for (i = srcno; i < srcno + num; ++i) {
> +        if (ICS_IRQ_FREE(ics, i)) {
> +            trace_xics_ics_free_warn(ics - ics->icp->ics, i + ics->offset);
> +        }
> +        memset(&ics->irqs[i], 0, sizeof(ICSIRQState));

Why does this do something different from ics_reset?

Alex

> +    }
> +}
> +
> +void xics_free(XICSState *icp, int server, int irq, int num)
> +{
> +    ICSState *ics = &icp->ics[server];
> +
> +    assert(server == 0);
> +
> +    trace_xics_ics_free(ics - icp->ics, irq, num);
> +    if (server >= 0) {
> +        ics_free(ics, irq - ics->offset, num);
> +    }
> +}
> +
>   /*
>    * Guest interfaces
>    */
> diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
> index 0f01a21..e5d8f47 100644
> --- a/include/hw/ppc/xics.h
> +++ b/include/hw/ppc/xics.h
> @@ -158,6 +158,7 @@ struct ICSIRQState {
>   qemu_irq xics_get_qirq(XICSState *icp, int irq);
>   int xics_alloc(XICSState *icp, int server, int irq_hint, bool lsi);
>   int xics_alloc_block(XICSState *icp, int server, int num, bool lsi, bool align);
> +void xics_free(XICSState *icp, int server, int irq, int num);
>   
>   void xics_cpu_setup(XICSState *icp, PowerPCCPU *cpu);
>   
> diff --git a/trace-events b/trace-events
> index 8cf8fb2..5ca126c 100644
> --- a/trace-events
> +++ b/trace-events
> @@ -1179,6 +1179,8 @@ xics_alloc(int server, int irq) "server#%d, irq %d"
>   xics_alloc_failed_hint(int server, int irq) "server#%d, irq %d is already in use"
>   xics_alloc_failed_no_left(int server) "server#%d, no irq left"
>   xics_alloc_block(int server, int first, int num, bool lsi, int align) "server#%d, first irq %d, %d irqs, lsi=%d, alignnum %d"
> +xics_ics_free(int server, int irq, int num) "server#%d, first irq %d, %d irqs"
> +xics_ics_free_warn(int server, int irq) "server#%d, irq %d is already free"
>   
>   # hw/ppc/spapr_iommu.c
>   spapr_iommu_put(uint64_t liobn, uint64_t ioba, uint64_t tce, uint64_t ret) "liobn=%"PRIx64" ioba=0x%"PRIx64" tce=0x%"PRIx64" ret=%"PRId64