This service allows to update an MSI route without releasing/reacquiring the associated VIRQ. Will be used by PCI device assignment, later on likely also by virtio/vhost and VFIO. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Acked-by: Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
279 lines
8.4 KiB
C
279 lines
8.4 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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#ifdef CONFIG_KVM
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#include <linux/kvm.h>
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#endif
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extern int 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_irqfds_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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#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_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_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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#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_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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#endif
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struct kvm_run;
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struct kvm_lapic_state;
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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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int kvm_init(void);
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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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#ifdef NEED_CPU_H
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int kvm_init_vcpu(CPUArchState *env);
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int kvm_cpu_exec(CPUArchState *env);
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#if !defined(CONFIG_USER_ONLY)
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void *kvm_vmalloc(ram_addr_t size);
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void *kvm_arch_vmalloc(ram_addr_t size);
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void kvm_setup_guest_memory(void *start, size_t size);
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int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
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int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
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void kvm_flush_coalesced_mmio_buffer(void);
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#endif
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int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
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target_ulong len, int type);
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int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
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target_ulong len, int type);
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void kvm_remove_all_breakpoints(CPUArchState *current_env);
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int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap);
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#ifndef _WIN32
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int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset);
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#endif
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int kvm_on_sigbus_vcpu(CPUArchState *env, 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(CPUArchState *env, int type, ...);
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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(CPUArchState *env, struct kvm_run *run);
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void kvm_arch_post_run(CPUArchState *env, struct kvm_run *run);
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int kvm_arch_handle_exit(CPUArchState *env, struct kvm_run *run);
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int kvm_arch_process_async_events(CPUArchState *env);
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int kvm_arch_get_registers(CPUArchState *env);
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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(CPUArchState *env, int level);
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int kvm_arch_init(KVMState *s);
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int kvm_arch_init_vcpu(CPUArchState *env);
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void kvm_arch_reset_vcpu(CPUArchState *env);
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int kvm_arch_on_sigbus_vcpu(CPUArchState *env, 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_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_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(CPUArchState *env,
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target_ulong pc);
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int kvm_sw_breakpoints_active(CPUArchState *env);
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int kvm_arch_insert_sw_breakpoint(CPUArchState *current_env,
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struct kvm_sw_breakpoint *bp);
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int kvm_arch_remove_sw_breakpoint(CPUArchState *current_env,
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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(CPUArchState *env, struct kvm_guest_debug *dbg);
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bool kvm_arch_stop_on_emulation_error(CPUArchState *env);
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int kvm_check_extension(KVMState *s, unsigned int extension);
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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_cpu_synchronize_state(CPUArchState *env);
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void kvm_cpu_synchronize_post_reset(CPUArchState *env);
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void kvm_cpu_synchronize_post_init(CPUArchState *env);
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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(CPUArchState *env)
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{
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if (kvm_enabled()) {
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kvm_cpu_synchronize_state(env);
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}
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}
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static inline void cpu_synchronize_post_reset(CPUArchState *env)
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{
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if (kvm_enabled()) {
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kvm_cpu_synchronize_post_reset(env);
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}
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}
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static inline void cpu_synchronize_post_init(CPUArchState *env)
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{
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if (kvm_enabled()) {
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kvm_cpu_synchronize_post_init(env);
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}
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}
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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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target_phys_addr_t *phys_addr);
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#endif
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#endif
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int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign,
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uint32_t size);
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int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
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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_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
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int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
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#endif
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