[Qemu-devel] [PATCH 3/3] spapr/irq: Drop spapr_irq_msi_reset()

[Greg Kurz]

PHBs already take care of clearing the MSIs from the bitmap during reset
or unplug. No need to do this globally from the machine code. Rather add
an assert to ensure that PHBs have acted as expected.

Signed-off-by: Greg Kurz <address@hidden>
---
 hw/ppc/spapr.c             |    4 ----
 hw/ppc/spapr_irq.c         |    7 ++-----
 include/hw/ppc/spapr_irq.h |    1 -
 3 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 5894329f29a9..855e9fbd9805 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1739,10 +1739,6 @@ static void spapr_machine_reset(MachineState *machine)
         ppc_set_compat(first_ppc_cpu, spapr->max_compat_pvr, &error_fatal);
     }
 
-    if (!SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
-        spapr_irq_msi_reset(spapr);
-    }
-
     /*
      * NVLink2-connected GPU RAM needs to be placed on a separate NUMA node.
      * We assign a new numa ID per GPU in spapr_pci_collect_nvgpu() which is
diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index d07aed8ca9f9..c72d8433681d 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -57,11 +57,6 @@ void spapr_irq_msi_free(SpaprMachineState *spapr, int irq, 
uint32_t num)
     bitmap_clear(spapr->irq_map, irq - SPAPR_IRQ_MSI, num);
 }
 
-void spapr_irq_msi_reset(SpaprMachineState *spapr)
-{
-    bitmap_clear(spapr->irq_map, 0, spapr->irq_map_nr);
-}
-
 static void spapr_irq_init_kvm(SpaprMachineState *spapr,
                                   SpaprIrq *irq, Error **errp)
 {
@@ -729,6 +724,8 @@ int spapr_irq_post_load(SpaprMachineState *spapr, int 
version_id)
 
 void spapr_irq_reset(SpaprMachineState *spapr, Error **errp)
 {
+    assert(bitmap_empty(spapr->irq_map, spapr->irq_map_nr));
+
     if (spapr->irq->reset) {
         spapr->irq->reset(spapr, errp);
     }
diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h
index f965a58f8954..44fe4f9e0e2e 100644
--- a/include/hw/ppc/spapr_irq.h
+++ b/include/hw/ppc/spapr_irq.h
@@ -28,7 +28,6 @@ void spapr_irq_msi_init(SpaprMachineState *spapr, uint32_t 
nr_msis);
 int spapr_irq_msi_alloc(SpaprMachineState *spapr, uint32_t num, bool align,
                         Error **errp);
 void spapr_irq_msi_free(SpaprMachineState *spapr, int irq, uint32_t num);
-void spapr_irq_msi_reset(SpaprMachineState *spapr);
 
 typedef struct SpaprIrq {
     uint32_t    nr_irqs;