diff options
| -rw-r--r-- | sys/i386/i386/io_apic.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sys/i386/i386/io_apic.c b/sys/i386/i386/io_apic.c index c7f1bbb..27251ce 100644 --- a/sys/i386/i386/io_apic.c +++ b/sys/i386/i386/io_apic.c @@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$"); #include <sys/malloc.h> #include <sys/lock.h> #include <sys/mutex.h> +#include <sys/sysctl.h> #include <vm/vm.h> #include <vm/pmap.h> @@ -129,6 +130,12 @@ struct pic ioapic_template = { ioapic_enable_source, ioapic_disable_source, static int bsp_id, current_cluster, logical_clusters, next_ioapic_base; static u_int next_id, program_logical_dest; +SYSCTL_NODE(_hw, OID_AUTO, apic, CTLFLAG_RD, 0, "APIC options"); +static int enable_extint; +SYSCTL_INT(_hw_apic, OID_AUTO, enable_extint, CTLFLAG_RDTUN, &enable_extint, 0, + "Enable the ExtINT pin in the first I/O APIC"); +TUNABLE_INT("hw.apic.enable_extint", &enable_extint); + static __inline void _ioapic_eoi_source(struct intsrc *isrc) { @@ -286,7 +293,7 @@ ioapic_program_intpin(struct ioapic_intsrc *intpin) switch (intpin->io_vector) { case VECTOR_EXTINT: KASSERT(intpin->io_edgetrigger, - ("EXTINT not edge triggered")); + ("ExtINT not edge triggered")); low |= IOART_DELEXINT; break; case VECTOR_NMI: @@ -680,7 +687,10 @@ ioapic_set_extint(void *cookie, u_int pin) return (EINVAL); io->io_pins[pin].io_bus = APIC_BUS_UNKNOWN; io->io_pins[pin].io_vector = VECTOR_EXTINT; - io->io_pins[pin].io_masked = 1; + if (enable_extint) + io->io_pins[pin].io_masked = 0; + else + io->io_pins[pin].io_masked = 1; io->io_pins[pin].io_edgetrigger = 1; io->io_pins[pin].io_activehi = 1; if (bootverbose) |
