Re: [PATCH 1/4] xics: Eliminate 'reject', 'resend' and 'eoi' class hooks

From: Greg Kurz <groug@kaod.org>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: gkurz@kaod.org, qemu-ppc@nongnu.org, clg@kaod.org, qemu-devel@nongnu.org
Subject: Re: [PATCH 1/4] xics: Eliminate 'reject', 'resend' and 'eoi' class hooks
Date: Tue, 24 Sep 2019 09:28:32 +0200	[thread overview]
Message-ID: <20190924092832.09452db5@bahia.lan> (raw)
In-Reply-To: <20190924045952.11412-2-david@gibson.dropbear.id.au>

On Tue, 24 Sep 2019 14:59:49 +1000
David Gibson <david@gibson.dropbear.id.au> wrote:

> Currently ics_reject(), ics_resend() and ics_eoi() indirect through
> class methods.  But there's only one implementation of each method,
> the one in TYPE_ICS_SIMPLE.  TYPE_ICS_BASE has no implementation, but
> it's never instantiated, and has no other subtypes.
> 
> So clean up by eliminating the method and just having ics_reject(),
> ics_resend() and ics_eoi() contain the logic directly.
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
> ---

Reviewed-by: Greg Kurz <groug@kaod.org>

>  hw/intc/trace-events  |  4 ++--
>  hw/intc/xics.c        | 54 +++++++++++--------------------------------
>  include/hw/ppc/xics.h |  4 ----
>  3 files changed, 15 insertions(+), 47 deletions(-)
> 
> diff --git a/hw/intc/trace-events b/hw/intc/trace-events
> index 719f46b516..fdc716c2cc 100644
> --- a/hw/intc/trace-events
> +++ b/hw/intc/trace-events
> @@ -70,8 +70,8 @@ xics_ics_simple_set_irq_msi(int srcno, int nr) "set_irq_msi: srcno %d [irq 0x%x]
>  xics_masked_pending(void) "set_irq_msi: masked pending"
>  xics_ics_simple_set_irq_lsi(int srcno, int nr) "set_irq_lsi: srcno %d [irq 0x%x]"
>  xics_ics_simple_write_xive(int nr, int srcno, int server, uint8_t priority) "ics_write_xive: irq 0x%x [src %d] server 0x%x prio 0x%x"
> -xics_ics_simple_reject(int nr, int srcno) "reject irq 0x%x [src %d]"
> -xics_ics_simple_eoi(int nr) "ics_eoi: irq 0x%x"
> +xics_ics_reject(int nr, int srcno) "reject irq 0x%x [src %d]"
> +xics_ics_eoi(int nr) "ics_eoi: irq 0x%x"
>  
>  # s390_flic_kvm.c
>  flic_create_device(int err) "flic: create device failed %d"
> diff --git a/hw/intc/xics.c b/hw/intc/xics.c
> index b2fca2975c..93139b0189 100644
> --- a/hw/intc/xics.c
> +++ b/hw/intc/xics.c
> @@ -98,32 +98,8 @@ void ics_pic_print_info(ICSState *ics, Monitor *mon)
>  #define XISR(icp)   (((icp)->xirr) & XISR_MASK)
>  #define CPPR(icp)   (((icp)->xirr) >> 24)
>  
> -static void ics_reject(ICSState *ics, uint32_t nr)
> -{
> -    ICSStateClass *k = ICS_BASE_GET_CLASS(ics);
> -
> -    if (k->reject) {
> -        k->reject(ics, nr);
> -    }
> -}
> -
> -void ics_resend(ICSState *ics)
> -{
> -    ICSStateClass *k = ICS_BASE_GET_CLASS(ics);
> -
> -    if (k->resend) {
> -        k->resend(ics);
> -    }
> -}
> -
> -static void ics_eoi(ICSState *ics, int nr)
> -{
> -    ICSStateClass *k = ICS_BASE_GET_CLASS(ics);
> -
> -    if (k->eoi) {
> -        k->eoi(ics, nr);
> -    }
> -}
> +static void ics_reject(ICSState *ics, uint32_t nr);
> +static void ics_eoi(ICSState *ics, uint32_t nr);
>  
>  static void icp_check_ipi(ICPState *icp)
>  {
> @@ -427,7 +403,7 @@ Object *icp_create(Object *cpu, const char *type, XICSFabric *xi, Error **errp)
>  /*
>   * ICS: Source layer
>   */
> -static void ics_simple_resend_msi(ICSState *ics, int srcno)
> +static void ics_resend_msi(ICSState *ics, int srcno)
>  {
>      ICSIRQState *irq = ics->irqs + srcno;
>  
> @@ -440,7 +416,7 @@ static void ics_simple_resend_msi(ICSState *ics, int srcno)
>      }
>  }
>  
> -static void ics_simple_resend_lsi(ICSState *ics, int srcno)
> +static void ics_resend_lsi(ICSState *ics, int srcno)
>  {
>      ICSIRQState *irq = ics->irqs + srcno;
>  
> @@ -478,7 +454,7 @@ static void ics_simple_set_irq_lsi(ICSState *ics, int srcno, int val)
>      } else {
>          irq->status &= ~XICS_STATUS_ASSERTED;
>      }
> -    ics_simple_resend_lsi(ics, srcno);
> +    ics_resend_lsi(ics, srcno);
>  }
>  
>  void ics_simple_set_irq(void *opaque, int srcno, int val)
> @@ -512,7 +488,7 @@ static void ics_simple_write_xive_msi(ICSState *ics, int srcno)
>  
>  static void ics_simple_write_xive_lsi(ICSState *ics, int srcno)
>  {
> -    ics_simple_resend_lsi(ics, srcno);
> +    ics_resend_lsi(ics, srcno);
>  }
>  
>  void ics_simple_write_xive(ICSState *ics, int srcno, int server,
> @@ -534,11 +510,11 @@ void ics_simple_write_xive(ICSState *ics, int srcno, int server,
>      }
>  }
>  
> -static void ics_simple_reject(ICSState *ics, uint32_t nr)
> +static void ics_reject(ICSState *ics, uint32_t nr)
>  {
>      ICSIRQState *irq = ics->irqs + nr - ics->offset;
>  
> -    trace_xics_ics_simple_reject(nr, nr - ics->offset);
> +    trace_xics_ics_reject(nr, nr - ics->offset);
>      if (irq->flags & XICS_FLAGS_IRQ_MSI) {
>          irq->status |= XICS_STATUS_REJECTED;
>      } else if (irq->flags & XICS_FLAGS_IRQ_LSI) {
> @@ -546,26 +522,26 @@ static void ics_simple_reject(ICSState *ics, uint32_t nr)
>      }
>  }
>  
> -static void ics_simple_resend(ICSState *ics)
> +void ics_resend(ICSState *ics)
>  {
>      int i;
>  
>      for (i = 0; i < ics->nr_irqs; i++) {
>          /* FIXME: filter by server#? */
>          if (ics->irqs[i].flags & XICS_FLAGS_IRQ_LSI) {
> -            ics_simple_resend_lsi(ics, i);
> +            ics_resend_lsi(ics, i);
>          } else {
> -            ics_simple_resend_msi(ics, i);
> +            ics_resend_msi(ics, i);
>          }
>      }
>  }
>  
> -static void ics_simple_eoi(ICSState *ics, uint32_t nr)
> +static void ics_eoi(ICSState *ics, uint32_t nr)
>  {
>      int srcno = nr - ics->offset;
>      ICSIRQState *irq = ics->irqs + srcno;
>  
> -    trace_xics_ics_simple_eoi(nr);
> +    trace_xics_ics_eoi(nr);
>  
>      if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
>          irq->status &= ~XICS_STATUS_SENT;
> @@ -617,10 +593,6 @@ static void ics_simple_class_init(ObjectClass *klass, void *data)
>                                      &isc->parent_realize);
>      device_class_set_parent_reset(dc, ics_simple_reset,
>                                    &isc->parent_reset);
> -
> -    isc->reject = ics_simple_reject;
> -    isc->resend = ics_simple_resend;
> -    isc->eoi = ics_simple_eoi;
>  }
>  
>  static const TypeInfo ics_simple_info = {
> diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
> index 64a2c8862a..34d7985b7c 100644
> --- a/include/hw/ppc/xics.h
> +++ b/include/hw/ppc/xics.h
> @@ -106,10 +106,6 @@ struct ICSStateClass {
>  
>      DeviceRealize parent_realize;
>      DeviceReset parent_reset;
> -
> -    void (*reject)(ICSState *s, uint32_t irq);
> -    void (*resend)(ICSState *s);
> -    void (*eoi)(ICSState *s, uint32_t irq);
>  };
>  
>  struct ICSState {