59 lines
1.7 KiB
Diff
59 lines
1.7 KiB
Diff
|
From 56e3adab09cbadb30045893c10ec2ff0d629bc6f Mon Sep 17 00:00:00 2001
|
||
|
|
From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
|
||
|
|
Date: Tue, 23 Feb 2021 13:41:12 +0100
|
||
|
|
Subject: [PATCH] mips: smp-bmips: fix CPU mappings
|
||
|
|
MIME-Version: 1.0
|
||
|
|
Content-Type: text/plain; charset=UTF-8
|
||
|
|
Content-Transfer-Encoding: 8bit
|
||
|
|
|
||
|
|
When booting bmips with SMP enabled on a BCM6358 running on CPU #1 instead of
|
||
|
|
CPU #0, the current CPU mapping code produces the following:
|
||
|
|
- smp_processor_id(): 0
|
||
|
|
- cpu_logical_map(): 1
|
||
|
|
- cpu_number_map(): 1
|
||
|
|
|
||
|
|
This is because SMP isn't supported on BCM6358 since it has a shared TLB, so
|
||
|
|
it is disabled and max_cpus is decreased from 2 to 1.
|
||
|
|
|
||
|
|
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
|
||
|
|
---
|
||
|
|
arch/mips/kernel/smp-bmips.c | 27 +++++++++++++++++----------
|
||
|
|
1 file changed, 17 insertions(+), 10 deletions(-)
|
||
|
|
|
||
|
|
--- a/arch/mips/kernel/smp-bmips.c
|
||
|
|
+++ b/arch/mips/kernel/smp-bmips.c
|
||
|
|
@@ -134,17 +134,24 @@ static void __init bmips_smp_setup(void)
|
||
|
|
if (!board_ebase_setup)
|
||
|
|
board_ebase_setup = &bmips_ebase_setup;
|
||
|
|
|
||
|
|
- __cpu_number_map[boot_cpu] = 0;
|
||
|
|
- __cpu_logical_map[0] = boot_cpu;
|
||
|
|
+ if (max_cpus > 1) {
|
||
|
|
+ __cpu_number_map[boot_cpu] = 0;
|
||
|
|
+ __cpu_logical_map[0] = boot_cpu;
|
||
|
|
|
||
|
|
- for (i = 0; i < max_cpus; i++) {
|
||
|
|
- if (i != boot_cpu) {
|
||
|
|
- __cpu_number_map[i] = cpu;
|
||
|
|
- __cpu_logical_map[cpu] = i;
|
||
|
|
- cpu++;
|
||
|
|
+ for (i = 0; i < max_cpus; i++) {
|
||
|
|
+ if (i != boot_cpu) {
|
||
|
|
+ __cpu_number_map[i] = cpu;
|
||
|
|
+ __cpu_logical_map[cpu] = i;
|
||
|
|
+ cpu++;
|
||
|
|
+ }
|
||
|
|
+ set_cpu_possible(i, 1);
|
||
|
|
+ set_cpu_present(i, 1);
|
||
|
|
}
|
||
|
|
- set_cpu_possible(i, 1);
|
||
|
|
- set_cpu_present(i, 1);
|
||
|
|
+ } else {
|
||
|
|
+ __cpu_number_map[0] = boot_cpu;
|
||
|
|
+ __cpu_logical_map[0] = 0;
|
||
|
|
+ set_cpu_possible(0, 1);
|
||
|
|
+ set_cpu_possible(0, 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|