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584ce6b2a0
The patch has been accepted upstream with some minor modifications. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
61 lines
1.8 KiB
Diff
61 lines
1.8 KiB
Diff
From c0f41a0dac1f3db6c40aabc0f3ac8868709ba6a6 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
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Date: Wed, 24 Feb 2021 08:33:36 +0100
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Subject: [PATCH] mips: smp-bmips: fix CPU mappings
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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When booting bmips with SMP enabled on a BCM6358 running on CPU #1 instead of
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CPU #0, the current CPU mapping code produces the following:
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- smp_processor_id(): 0
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- cpu_logical_map(0): 1
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- cpu_number_map(0): 1
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This is because SMP isn't supported on BCM6358 since it has a shared TLB, so
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it is disabled and max_cpus is decreased from 2 to 1.
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Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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---
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arch/mips/kernel/smp-bmips.c | 27 +++++++++++++++++----------
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1 file changed, 17 insertions(+), 10 deletions(-)
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--- a/arch/mips/kernel/smp-bmips.c
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+++ b/arch/mips/kernel/smp-bmips.c
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@@ -134,17 +134,24 @@ static void __init bmips_smp_setup(void)
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if (!board_ebase_setup)
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board_ebase_setup = &bmips_ebase_setup;
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- __cpu_number_map[boot_cpu] = 0;
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- __cpu_logical_map[0] = boot_cpu;
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+ if (max_cpus > 1) {
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+ __cpu_number_map[boot_cpu] = 0;
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+ __cpu_logical_map[0] = boot_cpu;
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- for (i = 0; i < max_cpus; i++) {
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- if (i != boot_cpu) {
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- __cpu_number_map[i] = cpu;
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- __cpu_logical_map[cpu] = i;
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- cpu++;
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+ for (i = 0; i < max_cpus; i++) {
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+ if (i != boot_cpu) {
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+ __cpu_number_map[i] = cpu;
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+ __cpu_logical_map[cpu] = i;
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+ cpu++;
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+ }
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+ set_cpu_possible(i, 1);
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+ set_cpu_present(i, 1);
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}
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- set_cpu_possible(i, 1);
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- set_cpu_present(i, 1);
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+ } else {
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+ __cpu_number_map[0] = boot_cpu;
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+ __cpu_logical_map[0] = 0;
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+ set_cpu_possible(0, 1);
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+ set_cpu_present(0, 1);
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}
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}
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