From: Andrew Jones
Support devicetree CPU topology descriptions.
Signed-off-by: Andrew Jones
---
hw/arm/virt.c | 37 -
include/hw/arm/virt.h | 1 +
2 files changed, 37 insertions(+), 1 deletion(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index acf9bfbece..71f7dbb317 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -348,7 +348,10 @@ static void fdt_add_cpu_nodes(const VirtMachineState *vms)
int cpu;
int addr_cells = 1;
const MachineState *ms = MACHINE(vms);
-
+VirtMachineClass *vmc = VIRT_MACHINE_GET_CLASS(vms);
+unsigned int smp_cores = ms->smp.cores;
+unsigned int smp_threads = ms->smp.threads;
+bool cpu_topology_enabled = !vmc->ignore_cpu_topology;
/*
* From Documentation/devicetree/bindings/arm/cpus.txt
* On ARM v8 64-bit systems value should be set to 2,
@@ -404,8 +407,37 @@ static void fdt_add_cpu_nodes(const VirtMachineState *vms)
ms->possible_cpus->cpus[cs->cpu_index].props.node_id);
}
+qemu_fdt_setprop_cell(vms->fdt, nodename, "phandle",
+ qemu_fdt_alloc_phandle(vms->fdt));
+
g_free(nodename);
}
+if (cpu_topology_enabled) {
+/* Add vcpu topology by fdt node cpu-map. */
+qemu_fdt_add_subnode(vms->fdt, "/cpus/cpu-map");
+
+for (cpu = vms->smp_cpus - 1; cpu >= 0; cpu--) {
+char *cpu_path = g_strdup_printf("/cpus/cpu@%d", cpu);
+char *map_path;
+
+if (smp_threads > 1) {
+map_path = g_strdup_printf(
+ "/cpus/cpu-map/%s%d/%s%d/%s%d",
+ "cluster", cpu / (smp_cores * smp_threads),
+ "core", (cpu / smp_threads) % smp_cores,
+ "thread", cpu % smp_threads);
+} else {
+map_path = g_strdup_printf(
+ "/cpus/cpu-map/%s%d/%s%d",
+ "cluster", cpu / smp_cores,
+ "core", cpu % smp_cores);
+}
+qemu_fdt_add_path(vms->fdt, map_path);
+qemu_fdt_setprop_phandle(vms->fdt, map_path, "cpu", cpu_path);
+g_free(map_path);
+g_free(cpu_path);
+}
+}
}
static void fdt_add_its_gic_node(VirtMachineState *vms)
@@ -2553,8 +2585,11 @@ DEFINE_VIRT_MACHINE_AS_LATEST(5, 2)
static void virt_machine_5_1_options(MachineClass *mc)
{
+VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc));
+
virt_machine_5_2_options(mc);
compat_props_add(mc->compat_props, hw_compat_5_1, hw_compat_5_1_len);
+vmc->ignore_cpu_topology = true;
}
DEFINE_VIRT_MACHINE(5, 1)
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index dff67e1bef..d37c6b7858 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -119,6 +119,7 @@ typedef struct {
MachineClass parent;
bool disallow_affinity_adjustment;
bool no_its;
+bool ignore_cpu_topology;
bool no_pmu;
bool claim_edge_triggered_timers;
bool smbios_old_sys_ver;
--
2.23.0
