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cpu/x86: Add support to run function on single AP

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This patch ensures that user can select a specific AP to run
a function.

BUG=b:74436746
BRANCH=none
TEST=Able to run functions over APs with argument.

Change-Id: Iff2f34900ce2a96ef6ff0779b651f25ebfc739ad
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/26034
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Subrata Banik
2018-05-03 18:48:41 +05:30
parent e66600ee4f
commit 8a25caee05
3 changed files with 29 additions and 9 deletions
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10
src/include/cpu/x86/mp.h
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@@ -116,6 +116,11 @@ struct mp_ops {
*/
int mp_init_with_smm(struct bus *cpu_bus, const struct mp_ops *mp_ops);
enum {
/* Function runs on all cores (both BSP and APs) */
MP_RUN_ON_ALL_CPUS,
/* Need to specify cores (only on APs) numbers */
};
/*
* After APs are up and PARALLEL_MP_AP_WORK is enabled one can issue work
@@ -123,10 +128,13 @@ int mp_init_with_smm(struct bus *cpu_bus, const struct mp_ops *mp_ops);
* to issue work. i.e. the APs should not call any of these functions.
*
* Input parameter expire_us <= 0 to specify an infinite timeout.
* logical_cpu_num = MP_RUN_ON_ALL_CPUS to execute function over all cores (BSP
* + APs) else specified AP number using logical_cpu_num.
*
* All functions return < 0 on error, 0 on success.
*/
int mp_run_on_aps(void (*func)(void *), void *arg, long expire_us);
int mp_run_on_aps(void (*func)(void *), void *arg, int logical_cpu_num,
long expire_us);
/* Like mp_run_on_aps() but also runs func on BSP. */
int mp_run_on_all_cpus(void (*func)(void *), void *arg, long expire_us);