diff mbox series

[4/4] arm: Create the cpufreq device

Message ID 20200213023532.902-5-fangying1@huawei.com (mailing list archive)
State New, archived
Headers show
Series arm64: Add the cpufreq device to show cpufreq info to guest | expand

Commit Message

fangying Feb. 13, 2020, 2:35 a.m. UTC 
Add the cpufreq device to arm64 virt machine

Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Signed-off-by: Ying Fang <fangying1@huawei.com>
---
 default-configs/aarch64-softmmu.mak |  1 +
 hw/acpi/Kconfig                     |  4 ++++
 hw/arm/virt.c                       | 13 +++++++++++++
 3 files changed, 18 insertions(+)
diff mbox series

Patch

diff --git a/default-configs/aarch64-softmmu.mak b/default-configs/aarch64-softmmu.mak
index 958b1e08e4..0a030e853f 100644
--- a/default-configs/aarch64-softmmu.mak
+++ b/default-configs/aarch64-softmmu.mak
@@ -6,3 +6,4 @@  include arm-softmmu.mak
 CONFIG_XLNX_ZYNQMP_ARM=y
 CONFIG_XLNX_VERSAL=y
 CONFIG_SBSA_REF=y
+CONFIG_CPUFREQ=y
diff --git a/hw/acpi/Kconfig b/hw/acpi/Kconfig
index 54209c6f2f..7d8aa58492 100644
--- a/hw/acpi/Kconfig
+++ b/hw/acpi/Kconfig
@@ -38,3 +38,7 @@  config ACPI_VMGENID
     depends on PC
 
 config ACPI_HW_REDUCED
+
+config CPUFREQ
+    bool
+    default y
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index ed9dc38b60..53638f9557 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -764,6 +764,17 @@  static void create_uart(const VirtMachineState *vms, int uart,
     g_free(nodename);
 }
 
+static void create_cpufreq(const VirtMachineState *vms, MemoryRegion *mem)
+{
+    hwaddr base = vms->memmap[VIRT_CPUFREQ].base;
+    DeviceState *dev = qdev_create(NULL, "cpufreq");
+    SysBusDevice *s = SYS_BUS_DEVICE(dev);
+
+    qdev_init_nofail(dev);
+    memory_region_add_subregion(mem, base, sysbus_mmio_get_region(s, 0));
+}
+
+
 static void create_rtc(const VirtMachineState *vms)
 {
     char *nodename;
@@ -1723,6 +1734,8 @@  static void machvirt_init(MachineState *machine)
 
     create_uart(vms, VIRT_UART, sysmem, serial_hd(0));
 
+    create_cpufreq(vms, sysmem);
+
     if (vms->secure) {
         create_secure_ram(vms, secure_sysmem);
         create_uart(vms, VIRT_SECURE_UART, secure_sysmem, serial_hd(1));