| x86.c (1425075e7272faaa3629a1e2df679c0ba4cf55d3) | x86.c (00f526850151e91fdad0896a1436341687ad2582) |
|---|---|
| 1/* 2 * Kernel-based Virtual Machine driver for Linux 3 * 4 * derived from drivers/kvm/kvm_main.c 5 * 6 * Copyright (C) 2006 Qumranet, Inc. 7 * Copyright (C) 2008 Qumranet, Inc. 8 * Copyright IBM Corporation, 2008 --- 1548 unchanged lines hidden (view full) --- 1557 cycle_t ret = (cycle_t)rdtsc_ordered(); 1558 u64 last = pvclock_gtod_data.clock.cycle_last; 1559 1560 if (likely(ret >= last)) 1561 return ret; 1562 1563 /* 1564 * GCC likes to generate cmov here, but this branch is extremely | 1/* 2 * Kernel-based Virtual Machine driver for Linux 3 * 4 * derived from drivers/kvm/kvm_main.c 5 * 6 * Copyright (C) 2006 Qumranet, Inc. 7 * Copyright (C) 2008 Qumranet, Inc. 8 * Copyright IBM Corporation, 2008 --- 1548 unchanged lines hidden (view full) --- 1557 cycle_t ret = (cycle_t)rdtsc_ordered(); 1558 u64 last = pvclock_gtod_data.clock.cycle_last; 1559 1560 if (likely(ret >= last)) 1561 return ret; 1562 1563 /* 1564 * GCC likes to generate cmov here, but this branch is extremely |
| 1565 * predictable (it's just a funciton of time and the likely is | 1565 * predictable (it's just a function of time and the likely is |
| 1566 * very likely) and there's a data dependence, so force GCC 1567 * to generate a branch instead. I don't barrier() because 1568 * we don't actually need a barrier, and if this function 1569 * ever gets inlined it will generate worse code. 1570 */ 1571 asm volatile (""); 1572 return last; 1573} --- 1173 unchanged lines hidden (view full) --- 2747 if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) 2748 kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); 2749 if (vcpu->cpu != cpu) 2750 kvm_migrate_timers(vcpu); 2751 vcpu->cpu = cpu; 2752 } 2753 2754 kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | 1566 * very likely) and there's a data dependence, so force GCC 1567 * to generate a branch instead. I don't barrier() because 1568 * we don't actually need a barrier, and if this function 1569 * ever gets inlined it will generate worse code. 1570 */ 1571 asm volatile (""); 1572 return last; 1573} --- 1173 unchanged lines hidden (view full) --- 2747 if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) 2748 kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); 2749 if (vcpu->cpu != cpu) 2750 kvm_migrate_timers(vcpu); 2751 vcpu->cpu = cpu; 2752 } 2753 2754 kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
| 2755 vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD; | |
| 2756} 2757 2758void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 2759{ 2760 kvm_x86_ops->vcpu_put(vcpu); 2761 kvm_put_guest_fpu(vcpu); 2762 vcpu->arch.last_host_tsc = rdtsc(); 2763} --- 3850 unchanged lines hidden (view full) --- 6614 6615 /* 6616 * Do this here before restoring debug registers on the host. And 6617 * since we do this before handling the vmexit, a DR access vmexit 6618 * can (a) read the correct value of the debug registers, (b) set 6619 * KVM_DEBUGREG_WONT_EXIT again. 6620 */ 6621 if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | 2755} 2756 2757void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 2758{ 2759 kvm_x86_ops->vcpu_put(vcpu); 2760 kvm_put_guest_fpu(vcpu); 2761 vcpu->arch.last_host_tsc = rdtsc(); 2762} --- 3850 unchanged lines hidden (view full) --- 6613 6614 /* 6615 * Do this here before restoring debug registers on the host. And 6616 * since we do this before handling the vmexit, a DR access vmexit 6617 * can (a) read the correct value of the debug registers, (b) set 6618 * KVM_DEBUGREG_WONT_EXIT again. 6619 */ 6620 if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { |
| 6622 int i; 6623 | |
| 6624 WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); 6625 kvm_x86_ops->sync_dirty_debug_regs(vcpu); | 6621 WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); 6622 kvm_x86_ops->sync_dirty_debug_regs(vcpu); |
| 6626 for (i = 0; i < KVM_NR_DB_REGS; i++) 6627 vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | 6623 kvm_update_dr0123(vcpu); 6624 kvm_update_dr6(vcpu); 6625 kvm_update_dr7(vcpu); 6626 vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; |
| 6628 } 6629 6630 /* 6631 * If the guest has used debug registers, at least dr7 6632 * will be disabled while returning to the host. 6633 * If we don't have active breakpoints in the host, we don't 6634 * care about the messed up debug address registers. But if 6635 * we have some of them active, restore the old state. --- 1755 unchanged lines hidden --- | 6627 } 6628 6629 /* 6630 * If the guest has used debug registers, at least dr7 6631 * will be disabled while returning to the host. 6632 * If we don't have active breakpoints in the host, we don't 6633 * care about the messed up debug address registers. But if 6634 * we have some of them active, restore the old state. --- 1755 unchanged lines hidden --- |