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Differential D6987 Diff 19222 head/sys/arm64/arm64/trap.c

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head/sys/arm64/arm64/trap.c

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* Special case for fuswintr and suswintr. These can't sleep so * Special case for fuswintr and suswintr. These can't sleep so
* handle them early on in the trap handler. * handle them early on in the trap handler.
*/ */
if (__predict_false(pcb->pcb_onfault == (vm_offset_t)&fsu_intr_fault)) { if (__predict_false(pcb->pcb_onfault == (vm_offset_t)&fsu_intr_fault)) {
frame->tf_elr = pcb->pcb_onfault; frame->tf_elr = pcb->pcb_onfault;
return; return;
} }
KASSERT(td->td_md.md_spinlock_count == 0,
("data abort with spinlock held"));
if (td->td_critnest != 0 || WITNESS_CHECK(WARN_SLEEPOK |
WARN_GIANTOK, NULL, "Kernel page fault") != 0) {
print_registers(frame);
printf(" far: %16lx\n", far);
printf(" esr: %.8lx\n", esr);
panic("data abort in critical section or under mutex");
}
p = td->td_proc; p = td->td_proc;
if (lower) if (lower)
map = &p->p_vmspace->vm_map; map = &p->p_vmspace->vm_map;
else { else {
/* The top bit tells us which range to use */ /* The top bit tells us which range to use */
if ((far >> 63) == 1) if ((far >> 63) == 1)
map = kernel_map; map = kernel_map;
else else
map = &p->p_vmspace->vm_map; map = &p->p_vmspace->vm_map;
}
if (pmap_fault(map->pmap, esr, far) == KERN_SUCCESS)
return;
KASSERT(td->td_md.md_spinlock_count == 0,
("data abort with spinlock held"));
if (td->td_critnest != 0 || WITNESS_CHECK(WARN_SLEEPOK |
WARN_GIANTOK, NULL, "Kernel page fault") != 0) {
print_registers(frame);
printf(" far: %16lx\n", far);
printf(" esr: %.8lx\n", esr);
panic("data abort in critical section or under mutex");
} }
va = trunc_page(far); va = trunc_page(far);
ftype = ((esr >> 6) & 1) ? VM_PROT_READ | VM_PROT_WRITE : VM_PROT_READ; ftype = ((esr >> 6) & 1) ? VM_PROT_READ | VM_PROT_WRITE : VM_PROT_READ;
/* Fault in the page. */ /* Fault in the page. */
error = vm_fault(map, va, ftype, VM_FAULT_NORMAL); error = vm_fault(map, va, ftype, VM_FAULT_NORMAL);
if (error != KERN_SUCCESS) { if (error != KERN_SUCCESS) {
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