diff options
Diffstat (limited to 'src/include/cpu/x86/lapic.h')
| -rw-r--r-- | src/include/cpu/x86/lapic.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/cpu/x86/lapic.h b/src/include/cpu/x86/lapic.h index c1603f21f0..e131d2ec46 100644 --- a/src/include/cpu/x86/lapic.h +++ b/src/include/cpu/x86/lapic.h @@ -145,8 +145,16 @@ static __always_inline unsigned int lapicid(void) static __always_inline void lapic_send_ipi_self(uint32_t icrlow) { + int i = 1000; + /* LAPIC_DEST_SELF does not support all delivery mode -fields. */ lapic_send_ipi(icrlow, lapicid()); + + /* In case of X2APIC force a short delay, to prevent deadlock in a case + * the immediately following code acquires some lock, like with printk(). + */ + while (CONFIG(X2APIC_ONLY) && i--) + cpu_relax(); } static __always_inline void lapic_send_ipi_others(uint32_t icrlow) |