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qemu/include/sysemu/kvm.h

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/*
* QEMU KVM support
*
* Copyright IBM, Corp. 2008
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef QEMU_KVM_H
#define QEMU_KVM_H
#include "qemu/queue.h"
#include "qom/cpu.h"
#include "exec/memattrs.h"
#include "hw/irq.h"
#ifdef CONFIG_KVM
#include <linux/kvm.h>
#include <linux/kvm_para.h>
#else
/* These constants must never be used at runtime if kvm_enabled() is false.
* They exist so we don't need #ifdefs around KVM-specific code that already
* checks kvm_enabled() properly.
*/
#define KVM_CPUID_SIGNATURE 0
#define KVM_CPUID_FEATURES 0
#define KVM_FEATURE_CLOCKSOURCE 0
#define KVM_FEATURE_NOP_IO_DELAY 0
#define KVM_FEATURE_MMU_OP 0
#define KVM_FEATURE_CLOCKSOURCE2 0
#define KVM_FEATURE_ASYNC_PF 0
#define KVM_FEATURE_STEAL_TIME 0
#define KVM_FEATURE_PV_EOI 0
#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 0
#endif
extern bool kvm_allowed;
extern bool kvm_kernel_irqchip;
extern bool kvm_split_irqchip;
extern bool kvm_async_interrupts_allowed;
extern bool kvm_halt_in_kernel_allowed;
extern bool kvm_eventfds_allowed;
extern bool kvm_irqfds_allowed;
extern bool kvm_resamplefds_allowed;
extern bool kvm_msi_via_irqfd_allowed;
extern bool kvm_gsi_routing_allowed;
extern bool kvm_gsi_direct_mapping;
extern bool kvm_readonly_mem_allowed;
extern bool kvm_direct_msi_allowed;
extern bool kvm_ioeventfd_any_length_allowed;
extern bool kvm_msi_use_devid;
#if defined CONFIG_KVM || !defined NEED_CPU_H
#define kvm_enabled() (kvm_allowed)
/**
* kvm_irqchip_in_kernel:
*
* Returns: true if the user asked us to create an in-kernel
* irqchip via the "kernel_irqchip=on" machine option.
* What this actually means is architecture and machine model
* specific: on PC, for instance, it means that the LAPIC,
* IOAPIC and PIT are all in kernel. This function should never
* be used from generic target-independent code: use one of the
* following functions or some other specific check instead.
*/
#define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
/**
* kvm_irqchip_is_split:
*
* Returns: true if the user asked us to split the irqchip
* implementation between user and kernel space. The details are
* architecture and machine specific. On PC, it means that the PIC,
* IOAPIC, and PIT are in user space while the LAPIC is in the kernel.
*/
#define kvm_irqchip_is_split() (kvm_split_irqchip)
/**
* kvm_async_interrupts_enabled:
*
* Returns: true if we can deliver interrupts to KVM
* asynchronously (ie by ioctl from any thread at any time)
* rather than having to do interrupt delivery synchronously
* (where the vcpu must be stopped at a suitable point first).
*/
#define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
/**
* kvm_halt_in_kernel
*
* Returns: true if halted cpus should still get a KVM_RUN ioctl to run
* inside of kernel space. This only works if MP state is implemented.
*/
#define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed)
/**
* kvm_eventfds_enabled:
*
* Returns: true if we can use eventfds to receive notifications
* from a KVM CPU (ie the kernel supports eventds and we are running
* with a configuration where it is meaningful to use them).
*/
#define kvm_eventfds_enabled() (kvm_eventfds_allowed)
/**
* kvm_irqfds_enabled:
*
* Returns: true if we can use irqfds to inject interrupts into
* a KVM CPU (ie the kernel supports irqfds and we are running
* with a configuration where it is meaningful to use them).
*/
#define kvm_irqfds_enabled() (kvm_irqfds_allowed)
/**
* kvm_resamplefds_enabled:
*
* Returns: true if we can use resamplefds to inject interrupts into
* a KVM CPU (ie the kernel supports resamplefds and we are running
* with a configuration where it is meaningful to use them).
*/
#define kvm_resamplefds_enabled() (kvm_resamplefds_allowed)
/**
* kvm_msi_via_irqfd_enabled:
*
* Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
* to a KVM CPU via an irqfd. This requires that the kernel supports
* this and that we're running in a configuration that permits it.
*/
#define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
/**
* kvm_gsi_routing_enabled:
*
* Returns: true if GSI routing is enabled (ie the kernel supports
* it and we're running in a configuration that permits it).
*/
#define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
/**
* kvm_gsi_direct_mapping:
*
* Returns: true if GSI direct mapping is enabled.
*/
#define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping)
/**
* kvm_readonly_mem_enabled:
*
* Returns: true if KVM readonly memory is enabled (ie the kernel
* supports it and we're running in a configuration that permits it).
*/
#define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed)
/**
* kvm_direct_msi_enabled:
*
* Returns: true if KVM allows direct MSI injection.
*/
#define kvm_direct_msi_enabled() (kvm_direct_msi_allowed)
/**
* kvm_ioeventfd_any_length_enabled:
* Returns: true if KVM allows any length io eventfd.
*/
#define kvm_ioeventfd_any_length_enabled() (kvm_ioeventfd_any_length_allowed)
/**
* kvm_msi_devid_required:
* Returns: true if KVM requires a device id to be provided while
* defining an MSI routing entry.
*/
#define kvm_msi_devid_required() (kvm_msi_use_devid)
#else
#define kvm_enabled() (0)
#define kvm_irqchip_in_kernel() (false)
#define kvm_irqchip_is_split() (false)
#define kvm_async_interrupts_enabled() (false)
#define kvm_halt_in_kernel() (false)
#define kvm_eventfds_enabled() (false)
#define kvm_irqfds_enabled() (false)
#define kvm_resamplefds_enabled() (false)
#define kvm_msi_via_irqfd_enabled() (false)
#define kvm_gsi_routing_allowed() (false)
#define kvm_gsi_direct_mapping() (false)
#define kvm_readonly_mem_enabled() (false)
#define kvm_direct_msi_enabled() (false)
#define kvm_ioeventfd_any_length_enabled() (false)
#define kvm_msi_devid_required() (false)
#endif
struct kvm_run;
struct kvm_lapic_state;
struct kvm_irq_routing_entry;
typedef struct KVMCapabilityInfo {
const char *name;
int value;
} KVMCapabilityInfo;
#define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
#define KVM_CAP_LAST_INFO { NULL, 0 }
struct KVMState;
typedef struct KVMState KVMState;
extern KVMState *kvm_state;
/* external API */
bool kvm_has_free_slot(MachineState *ms);
int kvm_has_sync_mmu(void);
int kvm_has_vcpu_events(void);
int kvm_has_robust_singlestep(void);
int kvm_has_debugregs(void);
int kvm_has_pit_state2(void);
int kvm_has_many_ioeventfds(void);
int kvm_has_gsi_routing(void);
int kvm_has_intx_set_mask(void);
int kvm_init_vcpu(CPUState *cpu);
int kvm_cpu_exec(CPUState *cpu);
int kvm_destroy_vcpu(CPUState *cpu);
#ifdef NEED_CPU_H
#include "cpu.h"
void kvm_flush_coalesced_mmio_buffer(void);
int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
target_ulong len, int type);
int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
target_ulong len, int type);
void kvm_remove_all_breakpoints(CPUState *cpu);
int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap);
int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
int kvm_on_sigbus(int code, void *addr);
/* interface with exec.c */
void phys_mem_set_alloc(void *(*alloc)(size_t, uint64_t *align));
/* internal API */
int kvm_ioctl(KVMState *s, int type, ...);
int kvm_vm_ioctl(KVMState *s, int type, ...);
int kvm_vcpu_ioctl(CPUState *cpu, int type, ...);
/**
* kvm_device_ioctl - call an ioctl on a kvm device
* @fd: The KVM device file descriptor as returned from KVM_CREATE_DEVICE
* @type: The device-ctrl ioctl number
*
* Returns: -errno on error, nonnegative on success
*/
int kvm_device_ioctl(int fd, int type, ...);
/**
* kvm_vm_check_attr - check for existence of a specific vm attribute
* @s: The KVMState pointer
* @group: the group
* @attr: the attribute of that group to query for
*
* Returns: 1 if the attribute exists
* 0 if the attribute either does not exist or if the vm device
* interface is unavailable
*/
int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr);
/**
* kvm_device_check_attr - check for existence of a specific device attribute
* @fd: The device file descriptor
* @group: the group
* @attr: the attribute of that group to query for
*
* Returns: 1 if the attribute exists
* 0 if the attribute either does not exist or if the vm device
* interface is unavailable
*/
int kvm_device_check_attr(int fd, uint32_t group, uint64_t attr);
/**
* kvm_device_access - set or get value of a specific vm attribute
* @fd: The device file descriptor
* @group: the group
* @attr: the attribute of that group to set or get
* @val: pointer to a storage area for the value
* @write: true for set and false for get operation
* @errp: error object handle
*
* Returns: 0 on success
* < 0 on error
* Use kvm_device_check_attr() in order to check for the availability
* of optional attributes.
*/
int kvm_device_access(int fd, int group, uint64_t attr,
void *val, bool write, Error **errp);
/**
* kvm_create_device - create a KVM device for the device control API
* @KVMState: The KVMState pointer
* @type: The KVM device type (see Documentation/virtual/kvm/devices in the
* kernel source)
* @test: If true, only test if device can be created, but don't actually
* create the device.
*
* Returns: -errno on error, nonnegative on success: @test ? 0 : device fd;
*/
int kvm_create_device(KVMState *s, uint64_t type, bool test);
/**
* kvm_device_supported - probe whether KVM supports specific device
*
* @vmfd: The fd handler for VM
* @type: type of device
*
* @return: true if supported, otherwise false.
*/
bool kvm_device_supported(int vmfd, uint64_t type);
/* Arch specific hooks */
extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run);
MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run);
int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run);
int kvm_arch_process_async_events(CPUState *cpu);
int kvm_arch_get_registers(CPUState *cpu);
/* state subset only touched by the VCPU itself during runtime */
#define KVM_PUT_RUNTIME_STATE 1
/* state subset modified during VCPU reset */
#define KVM_PUT_RESET_STATE 2
/* full state set, modified during initialization or on vmload */
#define KVM_PUT_FULL_STATE 3
int kvm_arch_put_registers(CPUState *cpu, int level);
int kvm_arch_init(MachineState *ms, KVMState *s);
int kvm_arch_init_vcpu(CPUState *cpu);
bool kvm_vcpu_id_is_valid(int vcpu_id);
/* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */
unsigned long kvm_arch_vcpu_id(CPUState *cpu);
#ifdef TARGET_I386
#define KVM_HAVE_MCE_INJECTION 1
void kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
#endif
void kvm_arch_init_irq_routing(KVMState *s);
int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
uint64_t address, uint32_t data, PCIDevice *dev);
/* Notify arch about newly added MSI routes */
int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
int vector, PCIDevice *dev);
/* Notify arch about released MSI routes */
int kvm_arch_release_virq_post(int virq);
int kvm_arch_msi_data_to_gsi(uint32_t data);
int kvm_set_irq(KVMState *s, int irq, int level);
int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
struct kvm_guest_debug;
struct kvm_debug_exit_arch;
struct kvm_sw_breakpoint {
target_ulong pc;
target_ulong saved_insn;
int use_count;
QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
};
QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
target_ulong pc);
int kvm_sw_breakpoints_active(CPUState *cpu);
int kvm_arch_insert_sw_breakpoint(CPUState *cpu,
struct kvm_sw_breakpoint *bp);
int kvm_arch_remove_sw_breakpoint(CPUState *cpu,
struct kvm_sw_breakpoint *bp);
int kvm_arch_insert_hw_breakpoint(target_ulong addr,
target_ulong len, int type);
int kvm_arch_remove_hw_breakpoint(target_ulong addr,
target_ulong len, int type);
void kvm_arch_remove_all_hw_breakpoints(void);
void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg);
bool kvm_arch_stop_on_emulation_error(CPUState *cpu);
int kvm_check_extension(KVMState *s, unsigned int extension);
int kvm_vm_check_extension(KVMState *s, unsigned int extension);
#define kvm_vm_enable_cap(s, capability, cap_flags, ...) \
({ \
struct kvm_enable_cap cap = { \
.cap = capability, \
.flags = cap_flags, \
}; \
uint64_t args_tmp[] = { __VA_ARGS__ }; \
int i; \
for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \
i < ARRAY_SIZE(cap.args); i++) { \
cap.args[i] = args_tmp[i]; \
} \
kvm_vm_ioctl(s, KVM_ENABLE_CAP, &cap); \
})
#define kvm_vcpu_enable_cap(cpu, capability, cap_flags, ...) \
({ \
struct kvm_enable_cap cap = { \
.cap = capability, \
.flags = cap_flags, \
}; \
uint64_t args_tmp[] = { __VA_ARGS__ }; \
int i; \
for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \
i < ARRAY_SIZE(cap.args); i++) { \
cap.args[i] = args_tmp[i]; \
} \
kvm_vcpu_ioctl(cpu, KVM_ENABLE_CAP, &cap); \
})
uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
uint32_t index, int reg);
void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len);
#if !defined(CONFIG_USER_ONLY)
int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
hwaddr *phys_addr);
#endif
#endif /* NEED_CPU_H */
void kvm_cpu_synchronize_state(CPUState *cpu);
void kvm_cpu_synchronize_post_reset(CPUState *cpu);
void kvm_cpu_synchronize_post_init(CPUState *cpu);
void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu);
void kvm_init_cpu_signals(CPUState *cpu);
/**
* kvm_irqchip_add_msi_route - Add MSI route for specific vector
* @s: KVM state
* @vector: which vector to add. This can be either MSI/MSIX
* vector. The function will automatically detect whether
* MSI/MSIX is enabled, and fetch corresponding MSI
* message.
* @dev: Owner PCI device to add the route. If @dev is specified
* as @NULL, an empty MSI message will be inited.
* @return: virq (>=0) when success, errno (<0) when failed.
*/
int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev);
int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
PCIDevice *dev);
void kvm_irqchip_commit_routes(KVMState *s);
void kvm_irqchip_release_virq(KVMState *s, int virq);
int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter);
int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint);
int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
EventNotifier *rn, int virq);
int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
int virq);
int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
EventNotifier *rn, qemu_irq irq);
int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n,
qemu_irq irq);
void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi);
void kvm_pc_gsi_handler(void *opaque, int n, int level);
void kvm_pc_setup_irq_routing(bool pci_enabled);
void kvm_init_irq_routing(KVMState *s);
/**
* kvm_arch_irqchip_create:
* @KVMState: The KVMState pointer
* @MachineState: The MachineState pointer
*
* Allow architectures to create an in-kernel irq chip themselves.
*
* Returns: < 0: error
* 0: irq chip was not created
* > 0: irq chip was created
*/
int kvm_arch_irqchip_create(MachineState *ms, KVMState *s);
/**
* kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl
* @id: The register ID
* @source: The pointer to the value to be set. It must point to a variable
* of the correct type/size for the register being accessed.
*
* Returns: 0 on success, or a negative errno on failure.
*/
int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source);
/**
* kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl
* @id: The register ID
* @target: The pointer where the value is to be stored. It must point to a
* variable of the correct type/size for the register being accessed.
*
* Returns: 0 on success, or a negative errno on failure.
*/
int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target);
struct ppc_radix_page_info *kvm_get_radix_page_info(void);
int kvm_get_max_memslots(void);
#endif
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