MFC: Add support for the hw.apic.enable_extint tunable.
Approved by: re (kensmith)
This commit is contained in:
parent
ec1f68015f
commit
e5a3602ce4
@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sysctl.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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@ -129,6 +130,12 @@ struct pic ioapic_template = { ioapic_enable_source, ioapic_disable_source,
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static int bsp_id, current_cluster, logical_clusters, next_ioapic_base;
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static u_int next_id, program_logical_dest;
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SYSCTL_NODE(_hw, OID_AUTO, apic, CTLFLAG_RD, 0, "APIC options");
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static int enable_extint;
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SYSCTL_INT(_hw_apic, OID_AUTO, enable_extint, CTLFLAG_RDTUN, &enable_extint, 0,
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"Enable the ExtINT pin in the first I/O APIC");
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TUNABLE_INT("hw.apic.enable_extint", &enable_extint);
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static __inline void
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_ioapic_eoi_source(struct intsrc *isrc)
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{
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@ -286,7 +293,7 @@ ioapic_program_intpin(struct ioapic_intsrc *intpin)
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switch (intpin->io_vector) {
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case VECTOR_EXTINT:
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KASSERT(intpin->io_edgetrigger,
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("EXTINT not edge triggered"));
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("ExtINT not edge triggered"));
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low |= IOART_DELEXINT;
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break;
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case VECTOR_NMI:
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@ -680,7 +687,10 @@ ioapic_set_extint(void *cookie, u_int pin)
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return (EINVAL);
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io->io_pins[pin].io_bus = APIC_BUS_UNKNOWN;
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io->io_pins[pin].io_vector = VECTOR_EXTINT;
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io->io_pins[pin].io_masked = 1;
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if (enable_extint)
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io->io_pins[pin].io_masked = 0;
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else
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io->io_pins[pin].io_masked = 1;
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io->io_pins[pin].io_edgetrigger = 1;
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io->io_pins[pin].io_activehi = 1;
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if (bootverbose)
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