[Xen-devel] [PATCH v3 17/17] libxl/arm: Initialize domain param HVM_PARAM_CALLBACK_IRQ

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

The guest kernel will get the event channel interrupt information via
domain param HVM_PARAM_CALLBACK_IRQ. Initialize it here.

Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
 tools/libxl/libxl_arm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/libxl/libxl_arm.c b/tools/libxl/libxl_arm.c
index bc38318..acacba0 100644
--- a/tools/libxl/libxl_arm.c
+++ b/tools/libxl/libxl_arm.c
@@ -900,8 +900,19 @@ int libxl__arch_domain_init_hw_description(libxl__gc *gc,
                                            struct xc_dom_image *dom)
 {
     int rc;
+    uint64_t val;
 
     assert(info->type == LIBXL_DOMAIN_TYPE_PV);
+
+    /* Set the value of domain param HVM_PARAM_CALLBACK_IRQ. */
+    val = (uint64_t)HVM_PARAM_CALLBACK_TYPE_PPI << 56;
+    val |= (2 << 8); /* Active-low level-sensitive  */
+    val |= GUEST_EVTCHN_PPI & 0xff;
+    rc = xc_hvm_param_set(dom->xch, dom->guest_domid, HVM_PARAM_CALLBACK_IRQ,
+                          val);
+    if (rc)
+        return rc;
+
     rc = libxl__prepare_dtb(gc, info, state, dom);
     if (rc)
         return rc;
-- 
2.0.4



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