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[Qemu-devel] [PATCH 08/10] xics: Handle KVM interrupt presentation from "simple" ICS code

Greg Kurz posted 10 patches 6 years, 11 months ago
[Qemu-devel] [PATCH 08/10] xics: Handle KVM interrupt presentation from "simple" ICS code
Posted by Greg Kurz 6 years, 11 months ago 
We want to use the "simple" ICS type in both KVM and non-KVM setups.
Teach the "simple" ICS how to present interrupts to KVM and adapt
sPAPR accordingly.

Signed-off-by: Greg Kurz <groug@kaod.org>
---
 hw/intc/xics.c        |    5 +++++
 hw/intc/xics_kvm.c    |    3 +--
 hw/ppc/spapr_irq.c    |    7 +------
 include/hw/ppc/xics.h |    2 +-
 4 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/hw/intc/xics.c b/hw/intc/xics.c
index 49401745c410..3009fa747277 100644
--- a/hw/intc/xics.c
+++ b/hw/intc/xics.c
@@ -466,6 +466,11 @@ void ics_simple_set_irq(void *opaque, int srcno, int val)
 {
     ICSState *ics = (ICSState *)opaque;
 
+    if (kvm_irqchip_in_kernel()) {
+        ics_kvm_set_irq(ics, srcno, val);
+        return;
+    }
+
     if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
         ics_simple_set_irq_lsi(ics, srcno, val);
     } else {
diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c
index e7b8d4c29ce6..f34eacda03e7 100644
--- a/hw/intc/xics_kvm.c
+++ b/hw/intc/xics_kvm.c
@@ -259,9 +259,8 @@ int ics_set_kvm_state(ICSState *ics)
     return 0;
 }
 
-void ics_kvm_set_irq(void *opaque, int srcno, int val)
+void ics_kvm_set_irq(ICSState *ics, int srcno, int val)
 {
-    ICSState *ics = opaque;
     struct kvm_irq_level args;
     int rc;
 
diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index e6893df61e76..9f43b7b3bf16 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -222,13 +222,8 @@ static int spapr_irq_post_load_xics(sPAPRMachineState *spapr, int version_id)
 static void spapr_irq_set_irq_xics(void *opaque, int srcno, int val)
 {
     sPAPRMachineState *spapr = opaque;
-    MachineState *machine = MACHINE(opaque);
 
-    if (kvm_enabled() && machine_kernel_irqchip_allowed(machine)) {
-        ics_kvm_set_irq(spapr->ics, srcno, val);
-    } else {
-        ics_simple_set_irq(spapr->ics, srcno, val);
-    }
+    ics_simple_set_irq(spapr->ics, srcno, val);
 }
 
 static void spapr_irq_reset_xics(sPAPRMachineState *spapr, Error **errp)
diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
index 06e87128f88e..61bd0fb9784f 100644
--- a/include/hw/ppc/xics.h
+++ b/include/hw/ppc/xics.h
@@ -180,7 +180,6 @@ void icp_eoi(ICPState *icp, uint32_t xirr);
 void ics_simple_write_xive(ICSState *ics, int nr, int server,
                            uint8_t priority, uint8_t saved_priority);
 void ics_simple_set_irq(void *opaque, int srcno, int val);
-void ics_kvm_set_irq(void *opaque, int srcno, int val);
 
 void ics_set_irq_type(ICSState *ics, int srcno, bool lsi);
 void icp_pic_print_info(ICPState *icp, Monitor *mon);
@@ -201,5 +200,6 @@ void icp_kvm_realize(DeviceState *dev, Error **errp);
 void ics_get_kvm_state(ICSState *ics);
 int ics_set_kvm_state(ICSState *ics);
 void ics_synchronize_state(ICSState *ics);
+void ics_kvm_set_irq(ICSState *ics, int srcno, int val);
 
 #endif /* XICS_H */
Re: [Qemu-devel] [PATCH 08/10] xics: Handle KVM interrupt presentation from "simple" ICS code
Posted by Cédric Le Goater 6 years, 11 months ago 
On 2/15/19 12:40 PM, Greg Kurz wrote:
> We want to use the "simple" ICS type in both KVM and non-KVM setups.
> Teach the "simple" ICS how to present interrupts to KVM and adapt
> sPAPR accordingly.

I don't see the benefits of this change.

C.


> Signed-off-by: Greg Kurz <groug@kaod.org>
> ---
>  hw/intc/xics.c        |    5 +++++
>  hw/intc/xics_kvm.c    |    3 +--
>  hw/ppc/spapr_irq.c    |    7 +------
>  include/hw/ppc/xics.h |    2 +-
>  4 files changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/hw/intc/xics.c b/hw/intc/xics.c
> index 49401745c410..3009fa747277 100644
> --- a/hw/intc/xics.c
> +++ b/hw/intc/xics.c
> @@ -466,6 +466,11 @@ void ics_simple_set_irq(void *opaque, int srcno, int val)
>  {
>      ICSState *ics = (ICSState *)opaque;
>  
> +    if (kvm_irqchip_in_kernel()) {
> +        ics_kvm_set_irq(ics, srcno, val);
> +        return;
> +    }
> +
>      if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
>          ics_simple_set_irq_lsi(ics, srcno, val);
>      } else {
> diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c
> index e7b8d4c29ce6..f34eacda03e7 100644
> --- a/hw/intc/xics_kvm.c
> +++ b/hw/intc/xics_kvm.c
> @@ -259,9 +259,8 @@ int ics_set_kvm_state(ICSState *ics)
>      return 0;
>  }
>  
> -void ics_kvm_set_irq(void *opaque, int srcno, int val)
> +void ics_kvm_set_irq(ICSState *ics, int srcno, int val)
>  {
> -    ICSState *ics = opaque;
>      struct kvm_irq_level args;
>      int rc;
>  
> diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
> index e6893df61e76..9f43b7b3bf16 100644
> --- a/hw/ppc/spapr_irq.c
> +++ b/hw/ppc/spapr_irq.c
> @@ -222,13 +222,8 @@ static int spapr_irq_post_load_xics(sPAPRMachineState *spapr, int version_id)
>  static void spapr_irq_set_irq_xics(void *opaque, int srcno, int val)
>  {
>      sPAPRMachineState *spapr = opaque;
> -    MachineState *machine = MACHINE(opaque);
>  
> -    if (kvm_enabled() && machine_kernel_irqchip_allowed(machine)) {
> -        ics_kvm_set_irq(spapr->ics, srcno, val);
> -    } else {
> -        ics_simple_set_irq(spapr->ics, srcno, val);
> -    }
> +    ics_simple_set_irq(spapr->ics, srcno, val);
>  }
>  
>  static void spapr_irq_reset_xics(sPAPRMachineState *spapr, Error **errp)
> diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
> index 06e87128f88e..61bd0fb9784f 100644
> --- a/include/hw/ppc/xics.h
> +++ b/include/hw/ppc/xics.h
> @@ -180,7 +180,6 @@ void icp_eoi(ICPState *icp, uint32_t xirr);
>  void ics_simple_write_xive(ICSState *ics, int nr, int server,
>                             uint8_t priority, uint8_t saved_priority);
>  void ics_simple_set_irq(void *opaque, int srcno, int val);
> -void ics_kvm_set_irq(void *opaque, int srcno, int val);
>  
>  void ics_set_irq_type(ICSState *ics, int srcno, bool lsi);
>  void icp_pic_print_info(ICPState *icp, Monitor *mon);
> @@ -201,5 +200,6 @@ void icp_kvm_realize(DeviceState *dev, Error **errp);
>  void ics_get_kvm_state(ICSState *ics);
>  int ics_set_kvm_state(ICSState *ics);
>  void ics_synchronize_state(ICSState *ics);
> +void ics_kvm_set_irq(ICSState *ics, int srcno, int val);
>  
>  #endif /* XICS_H */
>
Re: [Qemu-devel] [PATCH 08/10] xics: Handle KVM interrupt presentation from "simple" ICS code
Posted by Greg Kurz 6 years, 11 months ago 
On Fri, 15 Feb 2019 13:59:36 +0100
Cédric Le Goater <clg@kaod.org> wrote:

> On 2/15/19 12:40 PM, Greg Kurz wrote:
> > We want to use the "simple" ICS type in both KVM and non-KVM setups.
> > Teach the "simple" ICS how to present interrupts to KVM and adapt
> > sPAPR accordingly.  
> 
> I don't see the benefits of this change.
> 

Consistency with what the rest of the series actually does: hiding the
KVM details under XICS. But I agree it doesn't buy anything more so
I don't mind if it is dropped.

> C.
> 
> 
> > Signed-off-by: Greg Kurz <groug@kaod.org>
> > ---
> >  hw/intc/xics.c        |    5 +++++
> >  hw/intc/xics_kvm.c    |    3 +--
> >  hw/ppc/spapr_irq.c    |    7 +------
> >  include/hw/ppc/xics.h |    2 +-
> >  4 files changed, 8 insertions(+), 9 deletions(-)
> > 
> > diff --git a/hw/intc/xics.c b/hw/intc/xics.c
> > index 49401745c410..3009fa747277 100644
> > --- a/hw/intc/xics.c
> > +++ b/hw/intc/xics.c
> > @@ -466,6 +466,11 @@ void ics_simple_set_irq(void *opaque, int srcno, int val)
> >  {
> >      ICSState *ics = (ICSState *)opaque;
> >  
> > +    if (kvm_irqchip_in_kernel()) {
> > +        ics_kvm_set_irq(ics, srcno, val);
> > +        return;
> > +    }
> > +
> >      if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
> >          ics_simple_set_irq_lsi(ics, srcno, val);
> >      } else {
> > diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c
> > index e7b8d4c29ce6..f34eacda03e7 100644
> > --- a/hw/intc/xics_kvm.c
> > +++ b/hw/intc/xics_kvm.c
> > @@ -259,9 +259,8 @@ int ics_set_kvm_state(ICSState *ics)
> >      return 0;
> >  }
> >  
> > -void ics_kvm_set_irq(void *opaque, int srcno, int val)
> > +void ics_kvm_set_irq(ICSState *ics, int srcno, int val)
> >  {
> > -    ICSState *ics = opaque;
> >      struct kvm_irq_level args;
> >      int rc;
> >  
> > diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
> > index e6893df61e76..9f43b7b3bf16 100644
> > --- a/hw/ppc/spapr_irq.c
> > +++ b/hw/ppc/spapr_irq.c
> > @@ -222,13 +222,8 @@ static int spapr_irq_post_load_xics(sPAPRMachineState *spapr, int version_id)
> >  static void spapr_irq_set_irq_xics(void *opaque, int srcno, int val)
> >  {
> >      sPAPRMachineState *spapr = opaque;
> > -    MachineState *machine = MACHINE(opaque);
> >  
> > -    if (kvm_enabled() && machine_kernel_irqchip_allowed(machine)) {
> > -        ics_kvm_set_irq(spapr->ics, srcno, val);
> > -    } else {
> > -        ics_simple_set_irq(spapr->ics, srcno, val);
> > -    }
> > +    ics_simple_set_irq(spapr->ics, srcno, val);
> >  }
> >  
> >  static void spapr_irq_reset_xics(sPAPRMachineState *spapr, Error **errp)
> > diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
> > index 06e87128f88e..61bd0fb9784f 100644
> > --- a/include/hw/ppc/xics.h
> > +++ b/include/hw/ppc/xics.h
> > @@ -180,7 +180,6 @@ void icp_eoi(ICPState *icp, uint32_t xirr);
> >  void ics_simple_write_xive(ICSState *ics, int nr, int server,
> >                             uint8_t priority, uint8_t saved_priority);
> >  void ics_simple_set_irq(void *opaque, int srcno, int val);
> > -void ics_kvm_set_irq(void *opaque, int srcno, int val);
> >  
> >  void ics_set_irq_type(ICSState *ics, int srcno, bool lsi);
> >  void icp_pic_print_info(ICPState *icp, Monitor *mon);
> > @@ -201,5 +200,6 @@ void icp_kvm_realize(DeviceState *dev, Error **errp);
> >  void ics_get_kvm_state(ICSState *ics);
> >  int ics_set_kvm_state(ICSState *ics);
> >  void ics_synchronize_state(ICSState *ics);
> > +void ics_kvm_set_irq(ICSState *ics, int srcno, int val);
> >  
> >  #endif /* XICS_H */
> >   
>
Re: [Qemu-devel] [PATCH 08/10] xics: Handle KVM interrupt presentation from "simple" ICS code
Posted by David Gibson 6 years, 11 months ago 
On Fri, Feb 15, 2019 at 12:40:30PM +0100, Greg Kurz wrote:
> We want to use the "simple" ICS type in both KVM and non-KVM setups.
> Teach the "simple" ICS how to present interrupts to KVM and adapt
> sPAPR accordingly.
> 
> Signed-off-by: Greg Kurz <groug@kaod.org>

As Cédric points out, not strictly required to accomplish the series'
goals, but I think it's a nice cleanup, so applied.

> ---
>  hw/intc/xics.c        |    5 +++++
>  hw/intc/xics_kvm.c    |    3 +--
>  hw/ppc/spapr_irq.c    |    7 +------
>  include/hw/ppc/xics.h |    2 +-
>  4 files changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/hw/intc/xics.c b/hw/intc/xics.c
> index 49401745c410..3009fa747277 100644
> --- a/hw/intc/xics.c
> +++ b/hw/intc/xics.c
> @@ -466,6 +466,11 @@ void ics_simple_set_irq(void *opaque, int srcno, int val)
>  {
>      ICSState *ics = (ICSState *)opaque;
>  
> +    if (kvm_irqchip_in_kernel()) {
> +        ics_kvm_set_irq(ics, srcno, val);
> +        return;
> +    }
> +
>      if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
>          ics_simple_set_irq_lsi(ics, srcno, val);
>      } else {
> diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c
> index e7b8d4c29ce6..f34eacda03e7 100644
> --- a/hw/intc/xics_kvm.c
> +++ b/hw/intc/xics_kvm.c
> @@ -259,9 +259,8 @@ int ics_set_kvm_state(ICSState *ics)
>      return 0;
>  }
>  
> -void ics_kvm_set_irq(void *opaque, int srcno, int val)
> +void ics_kvm_set_irq(ICSState *ics, int srcno, int val)
>  {
> -    ICSState *ics = opaque;
>      struct kvm_irq_level args;
>      int rc;
>  
> diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
> index e6893df61e76..9f43b7b3bf16 100644
> --- a/hw/ppc/spapr_irq.c
> +++ b/hw/ppc/spapr_irq.c
> @@ -222,13 +222,8 @@ static int spapr_irq_post_load_xics(sPAPRMachineState *spapr, int version_id)
>  static void spapr_irq_set_irq_xics(void *opaque, int srcno, int val)
>  {
>      sPAPRMachineState *spapr = opaque;
> -    MachineState *machine = MACHINE(opaque);
>  
> -    if (kvm_enabled() && machine_kernel_irqchip_allowed(machine)) {
> -        ics_kvm_set_irq(spapr->ics, srcno, val);
> -    } else {
> -        ics_simple_set_irq(spapr->ics, srcno, val);
> -    }
> +    ics_simple_set_irq(spapr->ics, srcno, val);
>  }
>  
>  static void spapr_irq_reset_xics(sPAPRMachineState *spapr, Error **errp)
> diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
> index 06e87128f88e..61bd0fb9784f 100644
> --- a/include/hw/ppc/xics.h
> +++ b/include/hw/ppc/xics.h
> @@ -180,7 +180,6 @@ void icp_eoi(ICPState *icp, uint32_t xirr);
>  void ics_simple_write_xive(ICSState *ics, int nr, int server,
>                             uint8_t priority, uint8_t saved_priority);
>  void ics_simple_set_irq(void *opaque, int srcno, int val);
> -void ics_kvm_set_irq(void *opaque, int srcno, int val);
>  
>  void ics_set_irq_type(ICSState *ics, int srcno, bool lsi);
>  void icp_pic_print_info(ICPState *icp, Monitor *mon);
> @@ -201,5 +200,6 @@ void icp_kvm_realize(DeviceState *dev, Error **errp);
>  void ics_get_kvm_state(ICSState *ics);
>  int ics_set_kvm_state(ICSState *ics);
>  void ics_synchronize_state(ICSState *ics);
> +void ics_kvm_set_irq(ICSState *ics, int srcno, int val);
>  
>  #endif /* XICS_H */
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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