[RFC PATCH v8 09/10] vmapple, gicv2m: add macOS compat quirk

[Mohamed Mediouni <mohamed@unpredictable.fr>]

macOS expects bit 31 of MSI_TYPER to be set.

Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
---
 hw/intc/arm_gicv2m.c | 5 +++++
 hw/vmapple/vmapple.c | 1 +
 2 files changed, 6 insertions(+)

diff --git a/hw/intc/arm_gicv2m.c b/hw/intc/arm_gicv2m.c
index b343e17ca5..10598d8d50 100644
--- a/hw/intc/arm_gicv2m.c
+++ b/hw/intc/arm_gicv2m.c
@@ -57,6 +57,7 @@ struct ARMGICv2mState {
 
     uint32_t base_spi;
     uint32_t num_spi;
+    uint32_t macos_compat;
 };
 
 static void gicv2m_set_irq(void *opaque, int irq)
@@ -81,6 +82,9 @@ static uint64_t gicv2m_read(void *opaque, hwaddr offset,
     case V2M_MSI_TYPER:
         val = (s->base_spi + 32) << 16;
         val |= s->num_spi;
+        if (s->macos_compat) {
+            val |= BIT(31);
+        }
         return val;
     case V2M_MSI_IIDR:
         /* We don't have any valid implementor so we leave that field as zero
@@ -173,6 +177,7 @@ static void gicv2m_init(Object *obj)
 static const Property gicv2m_properties[] = {
     DEFINE_PROP_UINT32("base-spi", ARMGICv2mState, base_spi, 0),
     DEFINE_PROP_UINT32("num-spi", ARMGICv2mState, num_spi, 64),
+    DEFINE_PROP_UINT32("x-macos-compat", ARMGICv2mState, macos_compat, 0),
 };
 
 static void gicv2m_class_init(ObjectClass *klass, const void *data)
diff --git a/hw/vmapple/vmapple.c b/hw/vmapple/vmapple.c
index 2467c79ab3..072a49ac4f 100644
--- a/hw/vmapple/vmapple.c
+++ b/hw/vmapple/vmapple.c
@@ -299,6 +299,7 @@ static void create_gicv2m(VMAppleMachineState *vms)
     dev = qdev_new("arm-gicv2m");
     qdev_prop_set_uint32(dev, "base-spi", irq);
     qdev_prop_set_uint32(dev, "num-spi", NUM_GICV2M_SPIS);
+    qdev_prop_set_uint32(dev, "x-macos-compat", 1);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, vms->memmap[VMAPPLE_GICV2M].base);
 
-- 
2.54.0 (Apple Git-157)