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Differential D14633 Diff 40391 sys/x86/x86/local_apic.c

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sys/x86/x86/local_apic.c

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#ifdef DDB #ifdef DDB
#include <sys/interrupt.h> #include <sys/interrupt.h>
#include <ddb/ddb.h> #include <ddb/ddb.h>
#endif #endif
#ifdef __amd64__ #ifdef __amd64__
#define SDT_APIC SDT_SYSIGT #define SDT_APIC SDT_SYSIGT
#define SDT_APICT SDT_SYSIGT
#define GSEL_APIC 0 #define GSEL_APIC 0
#else #else
#define SDT_APIC SDT_SYS386IGT #define SDT_APIC SDT_SYS386IGT
#define SDT_APICT SDT_SYS386TGT
#define GSEL_APIC GSEL(GCODE_SEL, SEL_KPL) #define GSEL_APIC GSEL(GCODE_SEL, SEL_KPL)
#endif #endif
static MALLOC_DEFINE(M_LAPIC, "local_apic", "Local APIC items"); static MALLOC_DEFINE(M_LAPIC, "local_apic", "Local APIC items");
/* Sanity checks on IDT vectors. */ /* Sanity checks on IDT vectors. */
CTASSERT(APIC_IO_INTS + APIC_NUM_IOINTS == APIC_TIMER_INT); CTASSERT(APIC_IO_INTS + APIC_NUM_IOINTS == APIC_TIMER_INT);
CTASSERT(APIC_TIMER_INT < APIC_LOCAL_INTS); CTASSERT(APIC_TIMER_INT < APIC_LOCAL_INTS);
▲ Show 20 Lines • Show All 418 Lines • ▼ Show 20 Lines#endif
/* Local APIC error interrupt. */ /* Local APIC error interrupt. */
setidt(APIC_ERROR_INT, pti ? IDTVEC(errorint_pti) : IDTVEC(errorint), setidt(APIC_ERROR_INT, pti ? IDTVEC(errorint_pti) : IDTVEC(errorint),
SDT_APIC, SEL_KPL, GSEL_APIC); SDT_APIC, SEL_KPL, GSEL_APIC);
/* XXX: Thermal interrupt */ /* XXX: Thermal interrupt */
/* Local APIC CMCI. */ /* Local APIC CMCI. */
setidt(APIC_CMC_INT, pti ? IDTVEC(cmcint_pti) : IDTVEC(cmcint), setidt(APIC_CMC_INT, pti ? IDTVEC(cmcint_pti) : IDTVEC(cmcint),
SDT_APICT, SEL_KPL, GSEL_APIC); SDT_APIC, SEL_KPL, GSEL_APIC);
if ((resource_int_value("apic", 0, "clock", &i) != 0 || i != 0)) { if ((resource_int_value("apic", 0, "clock", &i) != 0 || i != 0)) {
arat = 0; arat = 0;
/* Intel CPUID 0x06 EAX[2] set if APIC timer runs in C3. */ /* Intel CPUID 0x06 EAX[2] set if APIC timer runs in C3. */
if (cpu_vendor_id == CPU_VENDOR_INTEL && cpu_high >= 6) { if (cpu_vendor_id == CPU_VENDOR_INTEL && cpu_high >= 6) {
do_cpuid(0x06, regs); do_cpuid(0x06, regs);
if ((regs[0] & CPUTPM1_ARAT) != 0) if ((regs[0] & CPUTPM1_ARAT) != 0)
arat = 1; arat = 1;
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#endif #endif
KASSERT(ioint_handlers[vector / 32] != NULL, KASSERT(ioint_handlers[vector / 32] != NULL,
("No ISR handler for vector %u", vector)); ("No ISR handler for vector %u", vector));
#ifdef notyet #ifdef notyet
/* /*
* We can not currently clear the idt entry because other cpus * We can not currently clear the idt entry because other cpus
* may have a valid vector at this offset. * may have a valid vector at this offset.
*/ */
setidt(vector, pti ? &IDTVEC(rsvd_pti) : &IDTVEC(rsvd), SDT_APICT, setidt(vector, pti ? &IDTVEC(rsvd_pti) : &IDTVEC(rsvd), SDT_APIC,
SEL_KPL, GSEL_APIC); SEL_KPL, GSEL_APIC);
#endif #endif
} }
/* Release an APIC vector when it's no longer in use. */ /* Release an APIC vector when it's no longer in use. */
static void static void
native_apic_free_vector(u_int apic_id, u_int vector, u_int irq) native_apic_free_vector(u_int apic_id, u_int vector, u_int irq)
{ {
▲ Show 20 Lines • Show All 524 Lines • ▼ Show 20 Lines KASSERT(vector >= IPI_DYN_FIRST && vector <= IPI_DYN_LAST,
("%s: invalid vector %d", __func__, vector)); ("%s: invalid vector %d", __func__, vector));
mtx_lock_spin(&icu_lock); mtx_lock_spin(&icu_lock);
ip = &idt[vector]; ip = &idt[vector];
func = (ip->gd_hioffset << 16) | ip->gd_looffset; func = (ip->gd_hioffset << 16) | ip->gd_looffset;
KASSERT(func != (uintptr_t)&IDTVEC(rsvd) && KASSERT(func != (uintptr_t)&IDTVEC(rsvd) &&
func != (uintptr_t)&IDTVEC(rsvd_pti), func != (uintptr_t)&IDTVEC(rsvd_pti),
("invalid idtfunc %#lx", func)); ("invalid idtfunc %#lx", func));
setidt(vector, pti ? &IDTVEC(rsvd_pti) : &IDTVEC(rsvd), SDT_APICT, setidt(vector, pti ? &IDTVEC(rsvd_pti) : &IDTVEC(rsvd), SDT_APIC,
SEL_KPL, GSEL_APIC); SEL_KPL, GSEL_APIC);
mtx_unlock_spin(&icu_lock); mtx_unlock_spin(&icu_lock);
} }