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| author | Andrew Turner <andrew@FreeBSD.org> | 2017-10-02 14:22:35 +0000 |
|---|---|---|
| committer | Andrew Turner <andrew@FreeBSD.org> | 2017-10-02 14:22:35 +0000 |
| commit | 5cf1f313c42465fab211ec7b8beecb47541e5326 (patch) | |
| tree | e0c44e2a367ffb096c60359fdc9bb43f8e5b62bb /sys/arm64/arm64/mp_machdep.c | |
| parent | f78bd12d6dd612d76f9019fb5f94e614f78a7e7e (diff) | |
| download | src-5cf1f313c42465fab211ec7b8beecb47541e5326.tar.gz src-5cf1f313c42465fab211ec7b8beecb47541e5326.zip | |
Add a memory barrier to ensure the atomic write is visible to the other
CPUs before waking them up.
Sponsored by: DARPA, AFRL
Notes
Notes:
svn path=/head/; revision=324207
Diffstat (limited to 'sys/arm64/arm64/mp_machdep.c')
| -rw-r--r-- | sys/arm64/arm64/mp_machdep.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/arm64/arm64/mp_machdep.c b/sys/arm64/arm64/mp_machdep.c index 99c0a745eaaf..2b2d7f8fbe2c 100644 --- a/sys/arm64/arm64/mp_machdep.c +++ b/sys/arm64/arm64/mp_machdep.c @@ -236,7 +236,10 @@ release_aps(void *dummy __unused) atomic_store_rel_int(&aps_ready, 1); /* Wake up the other CPUs */ - __asm __volatile("sev"); + __asm __volatile( + "dsb ishst \n" + "sev \n" + ::: "memory"); printf("Release APs\n"); |