[Qemu-devel] [PULL 25/43] ACPI: Virt: Generate SRAT table

[Peter Maydell <peter.maydell@linaro.org>]

From: Shannon Zhao <shannon.zhao@linaro.org>

To support NUMA, it needs to generate SRAT ACPI table.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-id: 1461667229-9216-6-git-send-email-zhaoshenglong@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/virt-acpi-build.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index f51fe39..26a7bac 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -43,6 +43,7 @@
 #include "hw/acpi/aml-build.h"
 #include "hw/pci/pcie_host.h"
 #include "hw/pci/pci.h"
+#include "sysemu/numa.h"
 
 #define ARM_SPI_BASE 32
 #define ACPI_POWER_BUTTON_DEVICE "PWRB"
@@ -414,6 +415,52 @@ build_spcr(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
 }
 
 static void
+build_srat(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
+{
+    AcpiSystemResourceAffinityTable *srat;
+    AcpiSratProcessorGiccAffinity *core;
+    AcpiSratMemoryAffinity *numamem;
+    int i, j, srat_start;
+    uint64_t mem_base;
+    uint32_t *cpu_node = g_malloc0(guest_info->smp_cpus * sizeof(uint32_t));
+
+    for (i = 0; i < guest_info->smp_cpus; i++) {
+        for (j = 0; j < nb_numa_nodes; j++) {
+            if (test_bit(i, numa_info[j].node_cpu)) {
+                cpu_node[i] = j;
+                break;
+            }
+        }
+    }
+
+    srat_start = table_data->len;
+    srat = acpi_data_push(table_data, sizeof(*srat));
+    srat->reserved1 = cpu_to_le32(1);
+
+    for (i = 0; i < guest_info->smp_cpus; ++i) {
+        core = acpi_data_push(table_data, sizeof(*core));
+        core->type = ACPI_SRAT_PROCESSOR_GICC;
+        core->length = sizeof(*core);
+        core->proximity = cpu_to_le32(cpu_node[i]);
+        core->acpi_processor_uid = cpu_to_le32(i);
+        core->flags = cpu_to_le32(1);
+    }
+    g_free(cpu_node);
+
+    mem_base = guest_info->memmap[VIRT_MEM].base;
+    for (i = 0; i < nb_numa_nodes; ++i) {
+        numamem = acpi_data_push(table_data, sizeof(*numamem));
+        build_srat_memory(numamem, mem_base, numa_info[i].node_mem, i,
+                          MEM_AFFINITY_ENABLED);
+        mem_base += numa_info[i].node_mem;
+    }
+
+    build_header(linker, table_data,
+                 (void *)(table_data->data + srat_start), "SRAT",
+                 table_data->len - srat_start, 3, NULL, NULL);
+}
+
+static void
 build_mcfg(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
 {
     AcpiTableMcfg *mcfg;
@@ -638,6 +685,11 @@ void virt_acpi_build(VirtGuestInfo *guest_info, AcpiBuildTables *tables)
     acpi_add_table(table_offsets, tables_blob);
     build_spcr(tables_blob, tables->linker, guest_info);
 
+    if (nb_numa_nodes > 0) {
+        acpi_add_table(table_offsets, tables_blob);
+        build_srat(tables_blob, tables->linker, guest_info);
+    }
+
     /* RSDT is pointed to by RSDP */
     rsdt = tables_blob->len;
     build_rsdt(tables_blob, tables->linker, table_offsets, NULL, NULL);
-- 
1.9.1