diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2021-11-26 14:50:42 +0100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2021-12-10 15:57:34 +0000 |
| commit | 48fbf2f21d261d5f4331e881bf03c52526f766cd (patch) | |
| tree | a485fefd23f2c1fe8d1379431dc0214221824204 /src | |
| parent | acb17fec34a609c5b674ad0d2af04d47800530e2 (diff) | |
cpu/x86/mp_init.c: Make it work for !CONFIG_SMP
With very little changes this code can be used to initialize systems
without SMP. The linker will remove most of the code.
Change-Id: Ia0e8fdf8ed7bc2e0e4ff01be8d3e3c3cb837e6c7
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59692
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/cpu/x86/Kconfig | 3 | ||||
| -rw-r--r-- | src/cpu/x86/mp_init.c | 4 |
2 files changed, 6 insertions, 1 deletions
diff --git a/src/cpu/x86/Kconfig b/src/cpu/x86/Kconfig index 693b8020be..13ff65d67b 100644 --- a/src/cpu/x86/Kconfig +++ b/src/cpu/x86/Kconfig @@ -1,12 +1,13 @@ config PARALLEL_MP def_bool y depends on !LEGACY_SMP_INIT - depends on SMP select CPU_INFO_V2 help This option uses common MP infrastructure for bringing up APs in parallel. It additionally provides a more flexible mechanism for sequencing the steps of bringing up the APs. + The code also works for just initialising the BSP in case there + are no APs. config PARALLEL_MP_AP_WORK def_bool n diff --git a/src/cpu/x86/mp_init.c b/src/cpu/x86/mp_init.c index 507b5fef8a..acbe579177 100644 --- a/src/cpu/x86/mp_init.c +++ b/src/cpu/x86/mp_init.c @@ -593,6 +593,10 @@ static enum cb_err mp_init(struct bus *cpu_bus, struct mp_params *p) return CB_ERR; } + /* We just need to run things on the BSP */ + if (!CONFIG(SMP)) + return bsp_do_flight_plan(p); + /* Default to currently running CPU. */ num_cpus = allocate_cpu_devices(cpu_bus, p); |