[PATCH v4 09/18] ppc/xive2: Add support for notification injection on ESB pages

["Cédric Le Goater" <clg@kaod.org>]

This is an internal offset used to inject triggers when the PQ state
bits are not controlled locally. Such as for LSIs when the PHB5 are
using the Address-Based Interrupt Trigger mode and on the END.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/ppc/xive.h |  1 +
 hw/intc/xive.c        |  9 +++++++++
 hw/intc/xive2.c       | 10 ++++++++++
 3 files changed, 20 insertions(+)

diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
index b8ab0bf7490f..875c7f639689 100644
--- a/include/hw/ppc/xive.h
+++ b/include/hw/ppc/xive.h
@@ -278,6 +278,7 @@ uint8_t xive_esb_set(uint8_t *pq, uint8_t value);
 #define XIVE_ESB_STORE_EOI      0x400 /* Store */
 #define XIVE_ESB_LOAD_EOI       0x000 /* Load */
 #define XIVE_ESB_GET            0x800 /* Load */
+#define XIVE_ESB_INJECT         0x800 /* Store */
 #define XIVE_ESB_SET_PQ_00      0xc00 /* Load */
 #define XIVE_ESB_SET_PQ_01      0xd00 /* Load */
 #define XIVE_ESB_SET_PQ_10      0xe00 /* Load */
diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index f15f98588a71..0d98b9539cd9 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -1061,6 +1061,15 @@ static void xive_source_esb_write(void *opaque, hwaddr addr,
         notify = xive_source_esb_eoi(xsrc, srcno);
         break;
 
+    /*
+     * This is an internal offset used to inject triggers when the PQ
+     * state bits are not controlled locally. Such as for LSIs when
+     * under ABT mode.
+     */
+    case XIVE_ESB_INJECT ... XIVE_ESB_INJECT + 0x3FF:
+        notify = true;
+        break;
+
     case XIVE_ESB_SET_PQ_00 ... XIVE_ESB_SET_PQ_00 + 0x0FF:
     case XIVE_ESB_SET_PQ_01 ... XIVE_ESB_SET_PQ_01 + 0x0FF:
     case XIVE_ESB_SET_PQ_10 ... XIVE_ESB_SET_PQ_10 + 0x0FF:
diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c
index 8f278f3bf680..2836bbdc83fc 100644
--- a/hw/intc/xive2.c
+++ b/hw/intc/xive2.c
@@ -659,6 +659,16 @@ static void xive2_end_source_write(void *opaque, hwaddr addr,
         notify = xive_esb_eoi(&pq);
         break;
 
+    case XIVE_ESB_INJECT ... XIVE_ESB_INJECT + 0x3FF:
+        if (end_esmask == END2_W1_ESe) {
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "XIVE: END %x/%x can not EQ inject on ESe\n",
+                           end_blk, end_idx);
+            return;
+        }
+        notify = true;
+        break;
+
     default:
         qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB write addr %d\n",
                       offset);
-- 
2.34.1