[Xen-devel] [PATCH v2 2/2] libxl: Use QMP cpu-add to hotplug CPU with qemu-xen.

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/libxl/libxl.c | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index ee1fa9c..e31b866 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -4237,7 +4237,8 @@ int libxl_domain_get_nodeaffinity(libxl_ctx *ctx, 
uint32_t domid,
     return 0;
 }
 
-int libxl_set_vcpuonline(libxl_ctx *ctx, uint32_t domid, libxl_bitmap *cpumap)
+static int libxl__set_vcpuonline_xenstore(libxl_ctx *ctx, uint32_t domid,
+                                         libxl_bitmap *cpumap)
 {
     GC_INIT(ctx);
     libxl_dominfo info;
@@ -4268,6 +4269,44 @@ out:
     return rc;
 }
 
+static int libxl__set_vcpuonline_qmp(libxl__gc *gc, uint32_t domid,
+                                     libxl_bitmap *cpumap)
+{
+    libxl_dominfo info;
+    int i, rc = 0;
+
+    if (libxl_domain_info(CTX, &info, domid) < 0) {
+        LIBXL__LOG_ERRNO(CTX, LIBXL__LOG_ERROR, "getting domain info list");
+        rc = ERROR_FAIL;
+        goto out;
+    }
+    for (i = 0; i <= info.vcpu_max_id; i++) {
+        if (libxl_bitmap_test(cpumap, i)) {
+            rc = libxl__qmp_cpu_add(gc, domid, i);
+        }
+    }
+out:
+    return rc;
+}
+
+int libxl_set_vcpuonline(libxl_ctx *ctx, uint32_t domid, libxl_bitmap *cpumap)
+{
+    GC_INIT(ctx);
+    int rc;
+    switch (libxl__device_model_version_running(gc, domid)) {
+    case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
+        rc = libxl__set_vcpuonline_xenstore(ctx, domid, cpumap);
+        break;
+    case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
+        rc = libxl__set_vcpuonline_qmp(gc, domid, cpumap);
+        break;
+    default:
+        rc = ERROR_INVAL;
+    }
+    GC_FREE;
+    return rc;
+}
+
 libxl_scheduler libxl_get_scheduler(libxl_ctx *ctx)
 {
     libxl_scheduler sched, ret;
-- 
Anthony PERARD


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