Using "cpu_pos_mask()" function to detect the real online cpus,
and discard the needless cpu nodes on kernel dts.
Signed-off-by: Wenbin Song <wenbin.s...@nxp.com>
---
Changes for v1:
Remove the config option.
Use id_to_core() funcation to find the position of core.
Changes for v2:
None.
Changes for v3:
Replace "ls1043a" with "layerscape" on the subject.
---
arch/arm/cpu/armv8/fsl-layerscape/fdt.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
index d1a7d0de9c..39ffe1ab4d 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
@@ -42,6 +42,33 @@ void ft_fixup_cpu(void *blob)
int addr_cells;
u64 val, core_id;
size_t *boot_code_size = &(__secondary_boot_code_size);
+ u32 mask = cpu_pos_mask();
+ int off_prev = -1;
+
+ off = fdt_path_offset(blob, "/cpus");
+ if (off < 0) {
+ puts("couldn't find /cpus node\n");
+ return;
+ }
+
+ fdt_support_default_count_cells(blob, off, &addr_cells, NULL);
+
+ off = fdt_node_offset_by_prop_value(blob, off_prev, "device_type",
+ "cpu", 4);
+ while (off != -FDT_ERR_NOTFOUND) {
+ reg = (fdt32_t *)fdt_getprop(blob, off, "reg", 0);
+ if (reg) {
+ core_id = fdt_read_number(reg, addr_cells);
+ if (!test_bit(id_to_core(core_id), &mask)) {
+ fdt_del_node(blob, off);
+ off = off_prev;
+ }
+ }
+ off_prev = off;
+ off = fdt_node_offset_by_prop_value(blob, off_prev,
+ "device_type", "cpu", 4);
+ }
+
#if defined(CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT) && \
defined(CONFIG_SEC_FIRMWARE_ARMV8_PSCI)
int node;
--
2.14.1
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