return -1;
}
- if (idx < 0) {
- idx = read_c0_random() % current_cpu_data.tlbsize;
- write_c0_index(idx);
- mtc0_tlbw_hazard();
- }
write_c0_entrylo0(entrylo0);
write_c0_entrylo1(entrylo1);
mtc0_tlbw_hazard();
- tlb_write_indexed();
+ if (idx < 0)
+ tlb_write_random();
+ else
+ tlb_write_indexed();
tlbw_use_hazard();
-#ifdef DEBUG
- if (debug) {
- kvm_debug("@ %#lx idx: %2d [entryhi(R): %#lx] "
- "entrylo0(R): 0x%08lx, entrylo1(R): 0x%08lx\n",
- vcpu->arch.pc, idx, read_c0_entryhi(),
- read_c0_entrylo0(), read_c0_entrylo1());
- }
-#endif
+ kvm_debug("@ %#lx idx: %2d [entryhi(R): %#lx] entrylo0(R): 0x%08lx, entrylo1(R): 0x%08lx\n",
+ vcpu->arch.pc, idx, read_c0_entryhi(),
+ read_c0_entrylo0(), read_c0_entrylo1());
/* Flush D-cache */
if (flush_dcache_mask) {
mtc0_tlbw_hazard();
tlbw_use_hazard();
-#ifdef DEBUG
kvm_debug ("@ %#lx idx: %2d [entryhi(R): %#lx] entrylo0 (R): 0x%08lx, entrylo1(R): 0x%08lx\n",
vcpu->arch.pc, read_c0_index(), read_c0_entryhi(),
read_c0_entrylo0(), read_c0_entrylo1());
-#endif
/* Restore old ASID */
write_c0_entryhi(old_entryhi);
entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | (0x3 << 3) |
(tlb->tlb_lo1 & MIPS3_PG_D) | (tlb->tlb_lo1 & MIPS3_PG_V);
-#ifdef DEBUG
kvm_debug("@ %#lx tlb_lo0: 0x%08lx tlb_lo1: 0x%08lx\n", vcpu->arch.pc,
tlb->tlb_lo0, tlb->tlb_lo1);
-#endif
return kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1,
tlb->tlb_mask);
}
}
-#ifdef DEBUG
kvm_debug("%s: entryhi: %#lx, index: %d lo0: %#lx, lo1: %#lx\n",
__func__, entryhi, index, tlb[i].tlb_lo0, tlb[i].tlb_lo1);
-#endif
return index;
}
local_irq_restore(flags);
-#ifdef DEBUG
kvm_debug("Host TLB lookup, %#lx, idx: %2d\n", vaddr, idx);
-#endif
return idx;
}
local_irq_restore(flags);
-#ifdef DEBUG
- if (idx > 0) {
+ if (idx > 0)
kvm_debug("%s: Invalidated entryhi %#lx @ idx %d\n", __func__,
- (va & VPN2_MASK) | (vcpu->arch.asid_map[va & ASID_MASK] & ASID_MASK), idx);
- }
-#endif
+ (va & VPN2_MASK) | kvm_mips_get_user_asid(vcpu), idx);
return 0;
}
local_irq_restore(flags);
}
+/**
+ * kvm_mips_migrate_count() - Migrate timer.
+ * @vcpu: Virtual CPU.
+ *
+ * Migrate CP0_Count hrtimer to the current CPU by cancelling and restarting it
+ * if it was running prior to being cancelled.
+ *
+ * Must be called when the VCPU is migrated to a different CPU to ensure that
+ * timer expiry during guest execution interrupts the guest and causes the
+ * interrupt to be delivered in a timely manner.
+ */
+static void kvm_mips_migrate_count(struct kvm_vcpu *vcpu)
+{
+ if (hrtimer_cancel(&vcpu->arch.comparecount_timer))
+ hrtimer_restart(&vcpu->arch.comparecount_timer);
+}
+
/* Restore ASID once we are scheduled back after preemption */
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
unsigned long flags;
int newasid = 0;
-#ifdef DEBUG
kvm_debug("%s: vcpu %p, cpu: %d\n", __func__, vcpu, cpu);
-#endif
/* Alocate new kernel and user ASIDs if needed */
vcpu->arch.guest_user_mm.context.asid[cpu];
newasid++;
- kvm_info("[%d]: cpu_context: %#lx\n", cpu,
- cpu_context(cpu, current->mm));
- kvm_info("[%d]: Allocated new ASID for Guest Kernel: %#x\n",
- cpu, vcpu->arch.guest_kernel_asid[cpu]);
- kvm_info("[%d]: Allocated new ASID for Guest User: %#x\n", cpu,
- vcpu->arch.guest_user_asid[cpu]);
+ kvm_debug("[%d]: cpu_context: %#lx\n", cpu,
+ cpu_context(cpu, current->mm));
+ kvm_debug("[%d]: Allocated new ASID for Guest Kernel: %#x\n",
+ cpu, vcpu->arch.guest_kernel_asid[cpu]);
+ kvm_debug("[%d]: Allocated new ASID for Guest User: %#x\n", cpu,
+ vcpu->arch.guest_user_asid[cpu]);
}
if (vcpu->arch.last_sched_cpu != cpu) {
- kvm_info("[%d->%d]KVM VCPU[%d] switch\n",
- vcpu->arch.last_sched_cpu, cpu, vcpu->vcpu_id);
+ kvm_debug("[%d->%d]KVM VCPU[%d] switch\n",
+ vcpu->arch.last_sched_cpu, cpu, vcpu->vcpu_id);
+ /*
+ * Migrate the timer interrupt to the current CPU so that it
+ * always interrupts the guest and synchronously triggers a
+ * guest timer interrupt.
+ */
+ kvm_mips_migrate_count(vcpu);
}
if (!newasid) {