1 files changed, 50 insertions, 0 deletions
diff --git a/hw/ppc/spapr_numa.c b/hw/ppc/spapr_numa.c
new file mode 100644
index 0000000000..cdf3288cbd
--- /dev/null
+++ b/hw/ppc/spapr_numa.c
@@ -0,0 +1,50 @@
+/*
+ * QEMU PowerPC pSeries Logical Partition NUMA associativity handling
+ *
+ * Copyright IBM Corp. 2020
+ *
+ * Authors:
+ *  Daniel Henrique Barboza      <danielhb413@gmail.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "hw/ppc/spapr_numa.h"
+#include "hw/ppc/fdt.h"
+
+/*
+ * Helper that writes ibm,associativity-reference-points and
+ * max-associativity-domains in the RTAS pointed by @rtas
+ * in the DT @fdt.
+ */
+void spapr_numa_write_rtas_dt(SpaprMachineState *spapr, void *fdt, int rtas)
+{
+    SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
+    uint32_t refpoints[] = {
+        cpu_to_be32(0x4),
+        cpu_to_be32(0x4),
+        cpu_to_be32(0x2),
+    };
+    uint32_t nr_refpoints = ARRAY_SIZE(refpoints);
+    uint32_t maxdomain = cpu_to_be32(spapr->gpu_numa_id > 1 ? 1 : 0);
+    uint32_t maxdomains[] = {
+        cpu_to_be32(4),
+        maxdomain,
+        maxdomain,
+        maxdomain,
+        cpu_to_be32(spapr->gpu_numa_id),
+    };
+
+    if (smc->pre_5_1_assoc_refpoints) {
+        nr_refpoints = 2;
+    }
+
+    _FDT(fdt_setprop(fdt, rtas, "ibm,associativity-reference-points",
+                     refpoints, nr_refpoints * sizeof(refpoints[0])));
+
+    _FDT(fdt_setprop(fdt, rtas, "ibm,max-associativity-domains",
+                     maxdomains, sizeof(maxdomains)));
+}