3 files changed, 114 insertions, 0 deletions
diff --git a/hw/cxl/cxl-host-stubs.c b/hw/cxl/cxl-host-stubs.c
new file mode 100644
index 0000000000..f8fd278d5d
--- /dev/null
+++ b/hw/cxl/cxl-host-stubs.c
@@ -0,0 +1,14 @@
+/*
+ * CXL host parameter parsing routine stubs
+ *
+ * Copyright (c) 2022 Huawei
+ */
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/cxl/cxl.h"
+
+void cxl_fixed_memory_window_config(MachineState *ms,
+                                    CXLFixedMemoryWindowOptions *object,
+                                    Error **errp) {};
+
+void cxl_fixed_memory_window_link_targets(Error **errp) {};
diff --git a/hw/cxl/cxl-host.c b/hw/cxl/cxl-host.c
new file mode 100644
index 0000000000..ec5a75cbf5
--- /dev/null
+++ b/hw/cxl/cxl-host.c
@@ -0,0 +1,94 @@
+/*
+ * CXL host parameter parsing routines
+ *
+ * Copyright (c) 2022 Huawei
+ * Modeled loosely on the NUMA options handling in hw/core/numa.c
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/units.h"
+#include "qemu/bitmap.h"
+#include "qemu/error-report.h"
+#include "qapi/error.h"
+#include "sysemu/qtest.h"
+#include "hw/boards.h"
+
+#include "qapi/qapi-visit-machine.h"
+#include "hw/cxl/cxl.h"
+
+void cxl_fixed_memory_window_config(MachineState *ms,
+                                    CXLFixedMemoryWindowOptions *object,
+                                    Error **errp)
+{
+    CXLFixedWindow *fw = g_malloc0(sizeof(*fw));
+    strList *target;
+    int i;
+
+    for (target = object->targets; target; target = target->next) {
+        fw->num_targets++;
+    }
+
+    fw->enc_int_ways = cxl_interleave_ways_enc(fw->num_targets, errp);
+    if (*errp) {
+        return;
+    }
+
+    fw->targets = g_malloc0_n(fw->num_targets, sizeof(*fw->targets));
+    for (i = 0, target = object->targets; target; i++, target = target->next) {
+        /* This link cannot be resolved yet, so stash the name for now */
+        fw->targets[i] = g_strdup(target->value);
+    }
+
+    if (object->size % (256 * MiB)) {
+        error_setg(errp,
+                   "Size of a CXL fixed memory window must my a multiple of 256MiB");
+        return;
+    }
+    fw->size = object->size;
+
+    if (object->has_interleave_granularity) {
+        fw->enc_int_gran =
+            cxl_interleave_granularity_enc(object->interleave_granularity,
+                                           errp);
+        if (*errp) {
+            return;
+        }
+    } else {
+        /* Default to 256 byte interleave */
+        fw->enc_int_gran = 0;
+    }
+
+    ms->cxl_devices_state->fixed_windows =
+        g_list_append(ms->cxl_devices_state->fixed_windows, fw);
+
+    return;
+}
+
+void cxl_fixed_memory_window_link_targets(Error **errp)
+{
+    MachineState *ms = MACHINE(qdev_get_machine());
+
+    if (ms->cxl_devices_state && ms->cxl_devices_state->fixed_windows) {
+        GList *it;
+
+        for (it = ms->cxl_devices_state->fixed_windows; it; it = it->next) {
+            CXLFixedWindow *fw = it->data;
+            int i;
+
+            for (i = 0; i < fw->num_targets; i++) {
+                Object *o;
+                bool ambig;
+
+                o = object_resolve_path_type(fw->targets[i],
+                                             TYPE_PXB_CXL_DEVICE,
+                                             &ambig);
+                if (!o) {
+                    error_setg(errp, "Could not resolve CXLFM target %s",
+                               fw->targets[i]);
+                    return;
+                }
+                fw->target_hbs[i] = PXB_CXL_DEV(o);
+            }
+        }
+    }
+}
diff --git a/hw/cxl/meson.build b/hw/cxl/meson.build
index e68eea2358..f117b99949 100644
--- a/hw/cxl/meson.build
+++ b/hw/cxl/meson.build
@@ -3,4 +3,10 @@ softmmu_ss.add(when: 'CONFIG_CXL',
                    'cxl-component-utils.c',
                    'cxl-device-utils.c',
                    'cxl-mailbox-utils.c',
+                   'cxl-host.c',
+               ),
+               if_false: files(
+                   'cxl-host-stubs.c',
                ))
+
+softmmu_ss.add(when: 'CONFIG_ALL', if_true: files('cxl-host-stubs.c'))