On Mon, Jan 4, 2016 at 4:00 PM, Miao Yan yanmiaobest@gmail.com wrote:
Currently, when booting with more that one CPU enabled, U-Boot scans 'cpu' node in device tree and calculates CPU number. This does not scale well as changing CPU number also requires modifying .dts and re-compiling U-Boot.
This patch uses fw_cfg interface provided by QEMU to detect online CPU number at runtime, and dynamically adds 'cpu' device to U-Boot's driver model.
Signed-off-by: Miao Yan yanmiaobest@gmail.com
arch/x86/cpu/mp_init.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++ arch/x86/cpu/qemu/cpu.c | 5 ---- 2 files changed, 73 insertions(+), 5 deletions(-)
[snip]
int cpu_qemu_bind(struct udevice *dev) {
struct cpu_platdata *plat = dev_get_parent_platdata(dev);plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset,"intel,apic-id", -1);return 0;}
Yep, this cpu_qemu_bind can be removed.
Reviewed-by: Bin Meng bmeng.cn@gmail.com Tested-by: Bin Meng bmeng.cn@gmail.com