spapr/xive: add state synchronization with KVM

This extends the KVM XIVE device backend with 'synchronize_state'
methods used to retrieve the state from KVM. The HW state of the
sources, the KVM device and the thread interrupt contexts are
collected for the monitor usage and also migration.

These get operations rely on their KVM counterpart in the host kernel
which acts as a proxy for OPAL, the host firmware. The set operations
will be added for migration support later.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20190513084245.25755-5-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 10 insertions, 7 deletions

diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c
index 03f92c3e65..e771db5fd0 100644
--- a/hw/intc/spapr_xive.c
+++ b/hw/intc/spapr_xive.c
@@ -41,13 +41,6 @@
 #define SPAPR_XIVE_NVT_BASE 0x400
 
 /*
- * The sPAPR machine has a unique XIVE IC device. Assign a fixed value
- * to the controller block id value. It can nevertheless be changed
- * for testing purpose.
- */
-#define SPAPR_XIVE_BLOCK_ID 0x0
-
-/*
  * sPAPR NVT and END indexing helpers
  */
 static uint32_t spapr_xive_nvt_to_target(uint8_t nvt_blk, uint32_t nvt_idx)
@@ -157,6 +150,16 @@ void spapr_xive_pic_print_info(SpaprXive *xive, Monitor *mon)
     XiveSource *xsrc = &xive->source;
     int i;
 
+    if (kvm_irqchip_in_kernel()) {
+        Error *local_err = NULL;
+
+        kvmppc_xive_synchronize_state(xive, &local_err);
+        if (local_err) {
+            error_report_err(local_err);
+            return;
+        }
+    }
+
     monitor_printf(mon, "  LISN         PQ    EISN     CPU/PRIO EQ\n");
 
     for (i = 0; i < xive->nr_irqs; i++) {