455 lines
15 KiB
C
455 lines
15 KiB
C
/*
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* QEMU KVM support
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*
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* Copyright IBM, Corp. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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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_H
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#define QEMU_KVM_H
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#include <errno.h>
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#include "config-host.h"
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#include "qemu/queue.h"
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#include "qom/cpu.h"
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#ifdef CONFIG_KVM
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#include <linux/kvm.h>
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#include <linux/kvm_para.h>
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#else
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/* These constants must never be used at runtime if kvm_enabled() is false.
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* They exist so we don't need #ifdefs around KVM-specific code that already
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* checks kvm_enabled() properly.
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*/
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#define KVM_CPUID_SIGNATURE 0
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#define KVM_CPUID_FEATURES 0
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#define KVM_FEATURE_CLOCKSOURCE 0
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#define KVM_FEATURE_NOP_IO_DELAY 0
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#define KVM_FEATURE_MMU_OP 0
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#define KVM_FEATURE_CLOCKSOURCE2 0
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#define KVM_FEATURE_ASYNC_PF 0
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#define KVM_FEATURE_STEAL_TIME 0
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#define KVM_FEATURE_PV_EOI 0
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#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 0
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#endif
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extern bool kvm_allowed;
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extern bool kvm_kernel_irqchip;
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extern bool kvm_async_interrupts_allowed;
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extern bool kvm_halt_in_kernel_allowed;
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extern bool kvm_eventfds_allowed;
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extern bool kvm_irqfds_allowed;
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extern bool kvm_resamplefds_allowed;
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extern bool kvm_msi_via_irqfd_allowed;
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extern bool kvm_gsi_routing_allowed;
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extern bool kvm_gsi_direct_mapping;
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extern bool kvm_readonly_mem_allowed;
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#if defined CONFIG_KVM || !defined NEED_CPU_H
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#define kvm_enabled() (kvm_allowed)
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/**
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* kvm_irqchip_in_kernel:
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*
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* Returns: true if the user asked us to create an in-kernel
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* irqchip via the "kernel_irqchip=on" machine option.
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* What this actually means is architecture and machine model
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* specific: on PC, for instance, it means that the LAPIC,
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* IOAPIC and PIT are all in kernel. This function should never
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* be used from generic target-independent code: use one of the
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* following functions or some other specific check instead.
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*/
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#define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
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/**
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* kvm_async_interrupts_enabled:
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*
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* Returns: true if we can deliver interrupts to KVM
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* asynchronously (ie by ioctl from any thread at any time)
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* rather than having to do interrupt delivery synchronously
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* (where the vcpu must be stopped at a suitable point first).
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*/
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#define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
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/**
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* kvm_halt_in_kernel
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*
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* Returns: true if halted cpus should still get a KVM_RUN ioctl to run
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* inside of kernel space. This only works if MP state is implemented.
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*/
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#define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed)
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/**
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* kvm_eventfds_enabled:
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*
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* Returns: true if we can use eventfds to receive notifications
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* from a KVM CPU (ie the kernel supports eventds and we are running
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* with a configuration where it is meaningful to use them).
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*/
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#define kvm_eventfds_enabled() (kvm_eventfds_allowed)
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/**
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* kvm_irqfds_enabled:
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*
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* Returns: true if we can use irqfds to inject interrupts into
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* a KVM CPU (ie the kernel supports irqfds and we are running
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* with a configuration where it is meaningful to use them).
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*/
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#define kvm_irqfds_enabled() (kvm_irqfds_allowed)
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/**
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* kvm_resamplefds_enabled:
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*
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* Returns: true if we can use resamplefds to inject interrupts into
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* a KVM CPU (ie the kernel supports resamplefds and we are running
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* with a configuration where it is meaningful to use them).
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*/
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#define kvm_resamplefds_enabled() (kvm_resamplefds_allowed)
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/**
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* kvm_msi_via_irqfd_enabled:
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*
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* Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
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* to a KVM CPU via an irqfd. This requires that the kernel supports
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* this and that we're running in a configuration that permits it.
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*/
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#define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
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/**
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* kvm_gsi_routing_enabled:
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*
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* Returns: true if GSI routing is enabled (ie the kernel supports
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* it and we're running in a configuration that permits it).
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*/
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#define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
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/**
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* kvm_gsi_direct_mapping:
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*
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* Returns: true if GSI direct mapping is enabled.
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*/
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#define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping)
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/**
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* kvm_readonly_mem_enabled:
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*
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* Returns: true if KVM readonly memory is enabled (ie the kernel
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* supports it and we're running in a configuration that permits it).
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*/
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#define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed)
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#else
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#define kvm_enabled() (0)
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#define kvm_irqchip_in_kernel() (false)
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#define kvm_async_interrupts_enabled() (false)
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#define kvm_halt_in_kernel() (false)
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#define kvm_eventfds_enabled() (false)
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#define kvm_irqfds_enabled() (false)
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#define kvm_msi_via_irqfd_enabled() (false)
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#define kvm_gsi_routing_allowed() (false)
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#define kvm_gsi_direct_mapping() (false)
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#define kvm_readonly_mem_enabled() (false)
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#endif
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struct kvm_run;
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struct kvm_lapic_state;
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struct kvm_irq_routing_entry;
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typedef struct KVMCapabilityInfo {
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const char *name;
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int value;
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} KVMCapabilityInfo;
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#define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
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#define KVM_CAP_LAST_INFO { NULL, 0 }
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struct KVMState;
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typedef struct KVMState KVMState;
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extern KVMState *kvm_state;
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/* external API */
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bool kvm_has_free_slot(MachineState *ms);
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int kvm_has_sync_mmu(void);
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int kvm_has_vcpu_events(void);
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int kvm_has_robust_singlestep(void);
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int kvm_has_debugregs(void);
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int kvm_has_xsave(void);
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int kvm_has_xcrs(void);
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int kvm_has_pit_state2(void);
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int kvm_has_many_ioeventfds(void);
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int kvm_has_gsi_routing(void);
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int kvm_has_intx_set_mask(void);
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int kvm_init_vcpu(CPUState *cpu);
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int kvm_cpu_exec(CPUState *cpu);
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#ifdef NEED_CPU_H
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void kvm_setup_guest_memory(void *start, size_t size);
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void kvm_flush_coalesced_mmio_buffer(void);
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int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
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target_ulong len, int type);
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int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
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target_ulong len, int type);
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void kvm_remove_all_breakpoints(CPUState *cpu);
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int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap);
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#ifndef _WIN32
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int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset);
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#endif
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int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
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int kvm_on_sigbus(int code, void *addr);
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/* internal API */
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int kvm_ioctl(KVMState *s, int type, ...);
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int kvm_vm_ioctl(KVMState *s, int type, ...);
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int kvm_vcpu_ioctl(CPUState *cpu, int type, ...);
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/**
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* kvm_device_ioctl - call an ioctl on a kvm device
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* @fd: The KVM device file descriptor as returned from KVM_CREATE_DEVICE
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* @type: The device-ctrl ioctl number
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*
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* Returns: -errno on error, nonnegative on success
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*/
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int kvm_device_ioctl(int fd, int type, ...);
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/**
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* kvm_vm_check_attr - check for existence of a specific vm attribute
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* @s: The KVMState pointer
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* @group: the group
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* @attr: the attribute of that group to query for
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*
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* Returns: 1 if the attribute exists
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* 0 if the attribute either does not exist or if the vm device
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* interface is unavailable
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*/
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int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr);
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/**
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* kvm_create_device - create a KVM device for the device control API
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* @KVMState: The KVMState pointer
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* @type: The KVM device type (see Documentation/virtual/kvm/devices in the
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* kernel source)
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* @test: If true, only test if device can be created, but don't actually
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* create the device.
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*
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* Returns: -errno on error, nonnegative on success: @test ? 0 : device fd;
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*/
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int kvm_create_device(KVMState *s, uint64_t type, bool test);
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/* Arch specific hooks */
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extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
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void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run);
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void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run);
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int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run);
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int kvm_arch_process_async_events(CPUState *cpu);
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int kvm_arch_get_registers(CPUState *cpu);
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/* state subset only touched by the VCPU itself during runtime */
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#define KVM_PUT_RUNTIME_STATE 1
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/* state subset modified during VCPU reset */
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#define KVM_PUT_RESET_STATE 2
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/* full state set, modified during initialization or on vmload */
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#define KVM_PUT_FULL_STATE 3
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int kvm_arch_put_registers(CPUState *cpu, int level);
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int kvm_arch_init(MachineState *ms, KVMState *s);
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int kvm_arch_init_vcpu(CPUState *cpu);
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/* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */
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unsigned long kvm_arch_vcpu_id(CPUState *cpu);
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int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
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int kvm_arch_on_sigbus(int code, void *addr);
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void kvm_arch_init_irq_routing(KVMState *s);
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int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
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uint64_t address, uint32_t data);
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int kvm_set_irq(KVMState *s, int irq, int level);
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int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
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void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
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void kvm_irqchip_commit_routes(KVMState *s);
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void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
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void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
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struct kvm_guest_debug;
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struct kvm_debug_exit_arch;
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struct kvm_sw_breakpoint {
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target_ulong pc;
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target_ulong saved_insn;
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int use_count;
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QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
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};
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QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
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struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
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target_ulong pc);
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int kvm_sw_breakpoints_active(CPUState *cpu);
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int kvm_arch_insert_sw_breakpoint(CPUState *cpu,
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struct kvm_sw_breakpoint *bp);
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int kvm_arch_remove_sw_breakpoint(CPUState *cpu,
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struct kvm_sw_breakpoint *bp);
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int kvm_arch_insert_hw_breakpoint(target_ulong addr,
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target_ulong len, int type);
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int kvm_arch_remove_hw_breakpoint(target_ulong addr,
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target_ulong len, int type);
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void kvm_arch_remove_all_hw_breakpoints(void);
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void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg);
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bool kvm_arch_stop_on_emulation_error(CPUState *cpu);
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int kvm_check_extension(KVMState *s, unsigned int extension);
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int kvm_vm_check_extension(KVMState *s, unsigned int extension);
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#define kvm_vm_enable_cap(s, capability, cap_flags, ...) \
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({ \
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struct kvm_enable_cap cap = { \
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.cap = capability, \
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.flags = cap_flags, \
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}; \
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uint64_t args_tmp[] = { __VA_ARGS__ }; \
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int i; \
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for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \
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i < ARRAY_SIZE(cap.args); i++) { \
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cap.args[i] = args_tmp[i]; \
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} \
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kvm_vm_ioctl(s, KVM_ENABLE_CAP, &cap); \
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})
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#define kvm_vcpu_enable_cap(cpu, capability, cap_flags, ...) \
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({ \
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struct kvm_enable_cap cap = { \
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.cap = capability, \
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.flags = cap_flags, \
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}; \
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uint64_t args_tmp[] = { __VA_ARGS__ }; \
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int i; \
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for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \
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i < ARRAY_SIZE(cap.args); i++) { \
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cap.args[i] = args_tmp[i]; \
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} \
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kvm_vcpu_ioctl(cpu, KVM_ENABLE_CAP, &cap); \
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})
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uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
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uint32_t index, int reg);
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void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len);
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#if !defined(CONFIG_USER_ONLY)
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int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
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hwaddr *phys_addr);
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#endif
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#endif /* NEED_CPU_H */
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void kvm_cpu_synchronize_state(CPUState *cpu);
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void kvm_cpu_synchronize_post_reset(CPUState *cpu);
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void kvm_cpu_synchronize_post_init(CPUState *cpu);
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void kvm_cpu_clean_state(CPUState *cpu);
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/* generic hooks - to be moved/refactored once there are more users */
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static inline void cpu_synchronize_state(CPUState *cpu)
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{
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if (kvm_enabled()) {
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kvm_cpu_synchronize_state(cpu);
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}
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}
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static inline void cpu_synchronize_post_reset(CPUState *cpu)
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{
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if (kvm_enabled()) {
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kvm_cpu_synchronize_post_reset(cpu);
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}
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}
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static inline void cpu_synchronize_post_init(CPUState *cpu)
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{
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if (kvm_enabled()) {
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kvm_cpu_synchronize_post_init(cpu);
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}
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}
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static inline void cpu_clean_state(CPUState *cpu)
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{
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if (kvm_enabled()) {
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kvm_cpu_clean_state(cpu);
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}
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}
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int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
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int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
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void kvm_irqchip_release_virq(KVMState *s, int virq);
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int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter);
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int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
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EventNotifier *rn, int virq);
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int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
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void kvm_pc_gsi_handler(void *opaque, int n, int level);
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void kvm_pc_setup_irq_routing(bool pci_enabled);
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void kvm_init_irq_routing(KVMState *s);
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/**
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* kvm_arch_irqchip_create:
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* @KVMState: The KVMState pointer
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*
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* Allow architectures to create an in-kernel irq chip themselves.
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*
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* Returns: < 0: error
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* 0: irq chip was not created
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* > 0: irq chip was created
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*/
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int kvm_arch_irqchip_create(KVMState *s);
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/**
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* kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl
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* @id: The register ID
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* @source: The pointer to the value to be set. It must point to a variable
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* of the correct type/size for the register being accessed.
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*
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* Returns: 0 on success, or a negative errno on failure.
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*/
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int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source);
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/**
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* kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl
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* @id: The register ID
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* @target: The pointer where the value is to be stored. It must point to a
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* variable of the correct type/size for the register being accessed.
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*
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* Returns: 0 on success, or a negative errno on failure.
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*/
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int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target);
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#endif
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