6053a86fe7
Check for KVM_CAP_ADJUST_CLOCK capability KVM_CLOCK_TSC_STABLE, which indicates that KVM_GET_CLOCK returns a value as seen by the guest at that moment. For new machine types, use this value rather than reading from guest memory. This reduces kvmclock difference on migration from 5s to 0.1s (when max_downtime == 5s). Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Message-Id: <20161121105052.598267440@redhat.com> [Add comment explaining what is going on. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
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* QEMU KVM support -- x86 specific functions.
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*
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* Copyright (c) 2012 Linaro Limited
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_KVM_I386_H
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#define QEMU_KVM_I386_H
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#include "sysemu/kvm.h"
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#define kvm_apic_in_kernel() (kvm_irqchip_in_kernel())
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bool kvm_allows_irq0_override(void);
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bool kvm_has_smm(void);
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bool kvm_has_adjust_clock_stable(void);
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void kvm_synchronize_all_tsc(void);
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void kvm_arch_reset_vcpu(X86CPU *cs);
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void kvm_arch_do_init_vcpu(X86CPU *cs);
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int kvm_device_pci_assign(KVMState *s, PCIHostDeviceAddress *dev_addr,
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uint32_t flags, uint32_t *dev_id);
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int kvm_device_pci_deassign(KVMState *s, uint32_t dev_id);
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int kvm_device_intx_assign(KVMState *s, uint32_t dev_id,
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bool use_host_msi, uint32_t guest_irq);
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int kvm_device_intx_set_mask(KVMState *s, uint32_t dev_id, bool masked);
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int kvm_device_intx_deassign(KVMState *s, uint32_t dev_id, bool use_host_msi);
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int kvm_device_msi_assign(KVMState *s, uint32_t dev_id, int virq);
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int kvm_device_msi_deassign(KVMState *s, uint32_t dev_id);
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bool kvm_device_msix_supported(KVMState *s);
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int kvm_device_msix_init_vectors(KVMState *s, uint32_t dev_id,
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uint32_t nr_vectors);
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int kvm_device_msix_set_vector(KVMState *s, uint32_t dev_id, uint32_t vector,
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int virq);
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int kvm_device_msix_assign(KVMState *s, uint32_t dev_id);
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int kvm_device_msix_deassign(KVMState *s, uint32_t dev_id);
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void kvm_put_apicbase(X86CPU *cpu, uint64_t value);
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bool kvm_enable_x2apic(void);
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bool kvm_has_x2apic_api(void);
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#endif
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