diff options
| author | Michal Meloun <mmel@FreeBSD.org> | 2020-12-14 11:57:43 +0000 |
|---|---|---|
| committer | Michal Meloun <mmel@FreeBSD.org> | 2020-12-14 11:57:43 +0000 |
| commit | 22f5cb76eb4a8eda305e932d39ff0f8a6aec9164 (patch) | |
| tree | d330a339fc6f53a82e4b04a5b1ef47f5b82a47aa /sys | |
| parent | 10557931153c8e347251b95418fe0f45dc2262dd (diff) | |
Notes
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arm64/arm64/mp_machdep.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sys/arm64/arm64/mp_machdep.c b/sys/arm64/arm64/mp_machdep.c index 71a3f6ba6529..8f1118d36bf5 100644 --- a/sys/arm64/arm64/mp_machdep.c +++ b/sys/arm64/arm64/mp_machdep.c @@ -206,6 +206,21 @@ init_secondary(uint64_t cpu) { struct pcpu *pcpup; pmap_t pmap0; + u_int mpidr; + + /* + * Verify that the value passed in 'cpu' argument (aka context_id) is + * valid. Some older U-Boot based PSCI implementations are buggy, + * they can pass random value in it. + */ + mpidr = READ_SPECIALREG(mpidr_el1) & CPU_AFF_MASK; + if (cpu >= MAXCPU || __pcpu[cpu].pc_mpidr != mpidr) { + for (cpu = 0; cpu < mp_maxid; cpu++) + if (__pcpu[cpu].pc_mpidr == mpidr) + break; + if ( cpu >= MAXCPU) + panic("MPIDR for this CPU is not in pcpu table"); + } pcpup = &__pcpu[cpu]; /* |