[Qemu-devel] [PATCH 18/19] ppc/xive: Make XIVE generate the proper interrupt types

["Cédric Le Goater" <clg@kaod.org>]

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

It should be generic Hypervisor Virtualization interrupts for HV
directed rings and traditional External Interrupts for the OS directed
ring.

Don't generate anything for the user ring as it isn't actually
supported.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/ppc/xive.h |  3 ++-
 hw/intc/xive.c        | 22 +++++++++++++++++++---
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
index 2bad8526221b..82e9aef677c5 100644
--- a/include/hw/ppc/xive.h
+++ b/include/hw/ppc/xive.h
@@ -316,7 +316,8 @@ typedef struct XiveTCTX {
     DeviceState parent_obj;
 
     CPUState    *cs;
-    qemu_irq    output;
+    qemu_irq    hv_output;
+    qemu_irq    os_output;
 
     uint8_t     regs[XIVE_TM_RING_COUNT * XIVE_TM_RING_SIZE];
     uint32_t    hw_cam;
diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index 119bb02d345d..14b854181ab7 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -61,13 +61,28 @@ static uint8_t exception_mask(uint8_t ring)
     }
 }
 
+static qemu_irq xive_tctx_output(XiveTCTX *tctx, uint8_t ring)
+{
+        switch (ring) {
+        case TM_QW0_USER:
+                return 0; /* Not supported */
+        case TM_QW1_OS:
+                return tctx->os_output;
+        case TM_QW2_HV_POOL:
+        case TM_QW3_HV_PHYS:
+                return tctx->hv_output;
+        default:
+                return 0;
+        }
+}
+
 static uint64_t xive_tctx_accept(XiveTCTX *tctx, uint8_t ring)
 {
     uint8_t *regs = &tctx->regs[ring];
     uint8_t nsr = regs[TM_NSR];
     uint8_t mask = exception_mask(ring);
 
-    qemu_irq_lower(tctx->output);
+    qemu_irq_lower(xive_tctx_output(tctx, ring));
 
     if (regs[TM_NSR] & mask) {
         uint8_t cppr = regs[TM_PIPR];
@@ -100,7 +115,7 @@ static void xive_tctx_notify(XiveTCTX *tctx, uint8_t ring)
         default:
             g_assert_not_reached();
         }
-        qemu_irq_raise(tctx->output);
+        qemu_irq_raise(xive_tctx_output(tctx, ring));
     }
 }
 
@@ -554,7 +569,8 @@ static void xive_tctx_realize(DeviceState *dev, Error **errp)
     env = &cpu->env;
     switch (PPC_INPUT(env)) {
     case PPC_FLAGS_INPUT_POWER9:
-        tctx->output = env->irq_inputs[POWER7_INPUT_INT];
+        tctx->hv_output = env->irq_inputs[POWER9_INPUT_HINT];
+        tctx->os_output = env->irq_inputs[POWER9_INPUT_INT];
         break;
 
     default:
-- 
2.20.1