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cpu/x86/mp_init.c: Use linked list data structures 

There is no need to keep track of device structures separately.

Change-Id: Ie728110fc8c60fec94ae4bedf74e17740cf78f67
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64340
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <inforichland@gmail.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
This commit is contained in:
Arthur Heymans 2022-05-14 01:22:30 +02:00 committed by Martin Roth
parent 49d014f7a0
commit 48c825ebd1
1 changed files with 10 additions and 6 deletions
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16
src/cpu/x86/mp_init.c
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@ -107,7 +107,7 @@ struct saved_msr {
/* The sipi vector rmodule is included in the ramstage using 'objdump -B'. */
extern char _binary_sipi_vector_start[];
/* The SIPI vector is loaded at the SMM_DEFAULT_BASE. The reason is at the
/* The SIPI vector is loaded at the SMM_DEFAULT_BASE. The reason is that the
* memory range is already reserved so the OS cannot use it. That region is
* free to use for AP bringup before SMM is initialized. */
static const uintptr_t sipi_vector_location = SMM_DEFAULT_BASE;
@ -121,9 +121,6 @@ struct mp_flight_plan {
static int global_num_aps;
static struct mp_flight_plan mp_info;
/* Keep track of device structure for each CPU. */
static struct device *cpus_dev[CONFIG_MAX_CPUS];
static inline void barrier_wait(atomic_t *b)
{
while (atomic_read(b) == 0)
@ -175,6 +172,8 @@ static void park_this_cpu(void *unused)
stop_this_cpu();
}
static struct bus *g_cpu_bus;
/* By the time APs call ap_init() caching has been setup, and microcode has
* been loaded. */
static void asmlinkage ap_init(void)
@ -185,7 +184,11 @@ static void asmlinkage ap_init(void)
enable_lapic();
setup_lapic_interrupts();
info->cpu = cpus_dev[info->index];
struct device *dev = g_cpu_bus->children;
for (unsigned int i = info->index; i > 0; i--)
dev = dev->sibling;
info->cpu = dev;
cpu_add_map_entry(info->index);
@ -384,7 +387,6 @@ static int allocate_cpu_devices(struct bus *cpu_bus, struct mp_params *p)
continue;
}
new->name = processor_name;
cpus_dev[i] = new;
}
return max_cpus;
@ -579,6 +581,8 @@ static enum cb_err mp_init(struct bus *cpu_bus, struct mp_params *p)
int num_cpus;
atomic_t *ap_count;
g_cpu_bus = cpu_bus;
init_bsp(cpu_bus);
if (p == NULL || p->flight_plan == NULL || p->num_records < 1) {