[PATCH v9 4/8] hw/acpi/aml-build: Add Processor hierarchy node structure

[Yanan Wang <wangyanan55@huawei.com>]

Add a generic API to build Processor hierarchy node structure (Type 0),
which is strictly consistent with descriptions in ACPI 6.3: 5.2.29.1.

This function will be used to build ACPI PPTT table for cpu topology.

Co-developed-by: Ying Fang <fangying1@huawei.com>
Co-developed-by: Henglong Fan <fanhenglong@huawei.com>
Co-developed-by: Yanan Wang <wangyanan55@huawei.com>
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
---
 hw/acpi/aml-build.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 76af0ebaf9..5195324585 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -1964,6 +1964,36 @@ void build_slit(GArray *table_data, BIOSLinker *linker, MachineState *ms,
     acpi_table_end(linker, &table);
 }
 
+/*
+ * ACPI spec, Revision 6.3
+ * 5.2.29.1 Processor hierarchy node structure (Type 0)
+ */
+static void build_processor_hierarchy_node(GArray *tbl, uint32_t flags,
+                                           uint32_t parent, uint32_t id,
+                                           uint32_t *priv_rsrc,
+                                           uint32_t priv_num)
+{
+    int i;
+
+    build_append_byte(tbl, 0);                 /* Type 0 - processor */
+    build_append_byte(tbl, 20 + priv_num * 4); /* Length */
+    build_append_int_noprefix(tbl, 0, 2);      /* Reserved */
+    build_append_int_noprefix(tbl, flags, 4);  /* Flags */
+    build_append_int_noprefix(tbl, parent, 4); /* Parent */
+    build_append_int_noprefix(tbl, id, 4);     /* ACPI Processor ID */
+
+    /* Number of private resources */
+    build_append_int_noprefix(tbl, priv_num, 4);
+
+    /* Private resources[N] */
+    if (priv_num > 0) {
+        assert(priv_rsrc);
+        for (i = 0; i < priv_num; i++) {
+            build_append_int_noprefix(tbl, priv_rsrc[i], 4);
+        }
+    }
+}
+
 /* build rev1/rev3/rev5.1 FADT */
 void build_fadt(GArray *tbl, BIOSLinker *linker, const AcpiFadtData *f,
                 const char *oem_id, const char *oem_table_id)
-- 
2.19.1