[Xen-devel] [PATCH] gic:vgic: avoid excessive conversions

[Andrii Anisov <andrii.anisov@xxxxxxxxx>]

From: Andrii Anisov <andrii_anisov@xxxxxxxx>

Avoid excessive conversions between pending_irq and irq number/priority.
This simlifies functions interface and reduces under locks code size.

Signed-off-by: Andrii Anisov <andrii_anisov@xxxxxxxx>
---
 xen/arch/arm/gic-vgic.c    | 10 +++-------
 xen/arch/arm/vgic-v3-its.c |  2 +-
 xen/arch/arm/vgic.c        |  6 +++---
 xen/include/asm-arm/gic.h  |  5 ++---
 4 files changed, 9 insertions(+), 14 deletions(-)

diff --git a/xen/arch/arm/gic-vgic.c b/xen/arch/arm/gic-vgic.c
index 990399c..e8e9136 100644
--- a/xen/arch/arm/gic-vgic.c
+++ b/xen/arch/arm/gic-vgic.c
@@ -73,10 +73,8 @@ void gic_remove_from_lr_pending(struct vcpu *v, struct 
pending_irq *p)
     list_del_init(&p->lr_queue);
 }
 
-void gic_raise_inflight_irq(struct vcpu *v, unsigned int virtual_irq)
+void gic_raise_inflight_irq(struct vcpu *v, struct pending_irq *n)
 {
-    struct pending_irq *n = irq_to_pending(v, virtual_irq);
-
     /* If an LPI has been removed meanwhile, there is nothing left to raise. */
     if ( unlikely(!n) )
         return;
@@ -133,12 +131,10 @@ static unsigned int gic_find_unused_lr(struct vcpu *v,
     return lr;
 }
 
-void gic_raise_guest_irq(struct vcpu *v, unsigned int virtual_irq,
-        unsigned int priority)
+void gic_raise_guest_irq(struct vcpu *v, struct pending_irq *p)
 {
     int i;
     unsigned int nr_lrs = gic_get_nr_lrs();
-    struct pending_irq *p = irq_to_pending(v, virtual_irq);
 
     ASSERT(spin_is_locked(&v->arch.vgic.lock));
 
@@ -227,7 +223,7 @@ static void gic_update_one_lr(struct vcpu *v, int i)
         if ( test_bit(GIC_IRQ_GUEST_ENABLED, &p->status) &&
              test_bit(GIC_IRQ_GUEST_QUEUED, &p->status) &&
              !test_bit(GIC_IRQ_GUEST_MIGRATING, &p->status) )
-            gic_raise_guest_irq(v, irq, p->priority);
+            gic_raise_guest_irq(v, p);
         else {
             list_del_init(&p->inflight);
             /*
diff --git a/xen/arch/arm/vgic-v3-its.c b/xen/arch/arm/vgic-v3-its.c
index 5b73c4e..193a28f 100644
--- a/xen/arch/arm/vgic-v3-its.c
+++ b/xen/arch/arm/vgic-v3-its.c
@@ -447,7 +447,7 @@ static void update_lpi_vgic_status(struct vcpu *v, struct 
pending_irq *p)
     {
         if ( !list_empty(&p->inflight) &&
              !test_bit(GIC_IRQ_GUEST_VISIBLE, &p->status) )
-            gic_raise_guest_irq(v, p->irq, p->lpi_priority);
+            gic_raise_guest_irq(v, p);
     }
     else
         gic_remove_from_lr_pending(v, p);
diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 5a4f082..628a34f 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -403,7 +403,7 @@ void vgic_enable_irqs(struct vcpu *v, uint32_t r, int n)
         p = irq_to_pending(v_target, irq);
         set_bit(GIC_IRQ_GUEST_ENABLED, &p->status);
         if ( !list_empty(&p->inflight) && !test_bit(GIC_IRQ_GUEST_VISIBLE, 
&p->status) )
-            gic_raise_guest_irq(v_target, irq, p->priority);
+            gic_raise_guest_irq(v_target, p);
         spin_unlock_irqrestore(&v_target->arch.vgic.lock, flags);
         if ( p->desc != NULL )
         {
@@ -568,7 +568,7 @@ void vgic_inject_irq(struct domain *d, struct vcpu *v, 
unsigned int virq,
 
     if ( !list_empty(&n->inflight) )
     {
-        gic_raise_inflight_irq(v, virq);
+        gic_raise_inflight_irq(v, n);
         goto out;
     }
 
@@ -577,7 +577,7 @@ void vgic_inject_irq(struct domain *d, struct vcpu *v, 
unsigned int virq,
 
     /* the irq is enabled */
     if ( test_bit(GIC_IRQ_GUEST_ENABLED, &n->status) )
-        gic_raise_guest_irq(v, virq, priority);
+        gic_raise_guest_irq(v, n);
 
     list_for_each_entry ( iter, &v->arch.vgic.inflight_irqs, inflight )
     {
diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
index fab02f1..1859416 100644
--- a/xen/include/asm-arm/gic.h
+++ b/xen/include/asm-arm/gic.h
@@ -252,9 +252,8 @@ int gic_remove_irq_from_guest(struct domain *d, unsigned 
int virq,
 extern void gic_clear_pending_irqs(struct vcpu *v);
 
 extern void init_maintenance_interrupt(void);
-extern void gic_raise_guest_irq(struct vcpu *v, unsigned int irq,
-        unsigned int priority);
-extern void gic_raise_inflight_irq(struct vcpu *v, unsigned int virtual_irq);
+extern void gic_raise_guest_irq(struct vcpu *v, struct pending_irq *p);
+extern void gic_raise_inflight_irq(struct vcpu *v, struct pending_irq *n);
 
 /* Accept an interrupt from the GIC and dispatch its handler */
 extern void gic_interrupt(struct cpu_user_regs *regs, int is_fiq);
-- 
2.7.4


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