[RFC v1 2/3] hw/riscv/virt-acpi-build.c: Generate PPTT table

[Sia Jee Heng]

Generate the Processor Properties Topology Table (PPTT) with a
cache type 1 structure for RISC-V virtual machine. A 3-layer
cache topology is used.

Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com>
---
 hw/riscv/virt-acpi-build.c | 49 +++++++++++++++++++++++++++++++++++++-
 hw/riscv/virt.c            |  1 +
 2 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/hw/riscv/virt-acpi-build.c b/hw/riscv/virt-acpi-build.c
index 26c7e4482d..d95ae1cf01 100644
--- a/hw/riscv/virt-acpi-build.c
+++ b/hw/riscv/virt-acpi-build.c
@@ -38,6 +38,7 @@
 #include "migration/vmstate.h"
 #include "qapi/error.h"
 #include "qemu/error-report.h"
+#include "qemu/units.h"
 #include "sysemu/reset.h"
 
 #define ACPI_BUILD_TABLE_SIZE             0x20000
@@ -528,12 +529,54 @@ static void build_madt(GArray *table_data,
     acpi_table_end(linker, &table);
 }
 
+static void pptt_setup(GArray *table_data, BIOSLinker *linker, MachineState 
*ms,
+                       const char *oem_id, const char *oem_table_id)
+{
+    CPUCaches default_cache_info = {
+        .l1d_cache = &(CPUCacheInfo) {
+            .type = DATA_CACHE,
+            .size = 64 * KiB,
+            .line_size = 64,
+            .associativity = 4,
+            .sets = 256,
+            .attributes = 0x02,
+        },
+        .l1i_cache = &(CPUCacheInfo) {
+            .type = INSTRUCTION_CACHE,
+            .size = 64 * KiB,
+            .line_size = 64,
+            .associativity = 4,
+            .sets = 256,
+            .attributes = 0x04,
+        },
+        .l2_cache = &(CPUCacheInfo) {
+            .type = UNIFIED_CACHE,
+            .size = 2048 * KiB,
+            .line_size = 64,
+            .associativity = 8,
+            .sets = 4096,
+            .attributes = 0x0a,
+        },
+        .l3_cache = &(CPUCacheInfo) {
+            .type = UNIFIED_CACHE,
+            .size = 4096 * KiB,
+            .line_size = 64,
+            .associativity = 8,
+            .sets = 8192,
+            .attributes = 0x0a,
+        },
+    };
+
+    build_pptt(table_data, linker, ms, oem_id, oem_table_id,
+               &default_cache_info);
+}
+
 static void virt_acpi_build(RISCVVirtState *s, AcpiBuildTables *tables)
 {
     GArray *table_offsets;
     unsigned dsdt, xsdt;
     GArray *tables_blob = tables->table_data;
-
+    MachineState *ms = MACHINE(s);
     table_offsets = g_array_new(false, true,
                                 sizeof(uint32_t));
 
@@ -555,6 +598,10 @@ static void virt_acpi_build(RISCVVirtState *s, 
AcpiBuildTables *tables)
     acpi_add_table(table_offsets, tables_blob);
     build_rhct(tables_blob, tables->linker, s);
 
+    acpi_add_table(table_offsets, tables_blob);
+    pptt_setup(tables_blob, tables->linker, ms,
+               s->oem_id, s->oem_table_id);
+
     acpi_add_table(table_offsets, tables_blob);
     {
         AcpiMcfgInfo mcfg = {
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index f9fd1341fc..a6f468fc22 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -1710,6 +1710,7 @@ static void virt_machine_class_init(ObjectClass *oc, void 
*data)
     mc->cpu_index_to_instance_props = riscv_numa_cpu_index_to_props;
     mc->get_default_cpu_node_id = riscv_numa_get_default_cpu_node_id;
     mc->numa_mem_supported = true;
+    mc->smp_props.clusters_supported = true;
     /* platform instead of architectural choice */
     mc->cpu_cluster_has_numa_boundary = true;
     mc->default_ram_id = "riscv_virt_board.ram";
-- 
2.34.1