[Xen-devel] [PATCH v2 17/17] libxl/arm: Initialize domain param HVM_PARAM_CALLBACK_IRQ

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

If Xen guest boots with ACPI, the guest kernel will get the event
channel interrupt information via domain param HVM_PARAM_CALLBACK_IRQ.
Initialize that domain param.

Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
 tools/libxl/libxl_arm_acpi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/libxl/libxl_arm_acpi.c b/tools/libxl/libxl_arm_acpi.c
index 263b5de..8a42125 100644
--- a/tools/libxl/libxl_arm_acpi.c
+++ b/tools/libxl/libxl_arm_acpi.c
@@ -348,6 +348,7 @@ int libxl__prepare_acpi(libxl__gc *gc, 
libxl_domain_build_info *info,
 {
     const libxl_version_info *vers;
     int rc;
+    uint64_t val;
 
     /* convenience aliases */
     xc_domain_configuration_t *xc_config = &state->config;
@@ -373,7 +374,12 @@ int libxl__prepare_acpi(libxl__gc *gc, 
libxl_domain_build_info *info,
     make_acpi_dsdt(gc, dom);
     link_acpi_tables(gc, dom);
 
-    return 0;
+    /* 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;
+    return xc_hvm_param_set(dom->xch, dom->guest_domid, HVM_PARAM_CALLBACK_IRQ,
+                            val);
 }
 
 /*
-- 
2.0.4



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