diff options
| author | Andrew Turner <andrew@FreeBSD.org> | 2021-08-11 15:01:25 +0000 |
|---|---|---|
| committer | Andrew Turner <andrew@FreeBSD.org> | 2021-09-27 08:36:38 +0000 |
| commit | 53192f33198ac8c225579934f258db115ae7139a (patch) | |
| tree | 998f5d4f49ec70d67b962892c6822c611cc91cbf | |
| parent | 273fef1f9b0f60ef37f85a6067299a07bca2ec82 (diff) | |
Read the arm64 midr register earlier
We use the midr_el1 register to decode which CPU type we are booting
from. Read it on the secondary CPUs before waiting for the boot CPU
to release us as it will need to use it before the release.
Sponsored by: The FreeBSD Foundation
(cherry picked from commit 6b22840ed0e8f9ceb34465987b8469a43ebb4582)
| -rw-r--r-- | sys/arm64/arm64/mp_machdep.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/sys/arm64/arm64/mp_machdep.c b/sys/arm64/arm64/mp_machdep.c index 3b1a8cc89cab..547bd576362e 100644 --- a/sys/arm64/arm64/mp_machdep.c +++ b/sys/arm64/arm64/mp_machdep.c @@ -239,6 +239,7 @@ init_secondary(uint64_t cpu) * We need this before signalling the CPU is ready to * let the boot CPU use the results. */ + pcpup->pc_midr = get_midr(); identify_cpu(cpu); /* Ensure the stores in identify_cpu have completed */ @@ -249,8 +250,6 @@ init_secondary(uint64_t cpu) while (!atomic_load_int(&aps_ready)) __asm __volatile("wfe"); - pcpup->pc_midr = get_midr(); - /* Initialize curthread */ KASSERT(PCPU_GET(idlethread) != NULL, ("no idle thread")); pcpup->pc_curthread = pcpup->pc_idlethread; |