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4531220b71
There is no point in doing the ready_for_nmi_injection/ request_nmi_window dance with user space. First, we don't do this for in-kernel irqchip anyway, while the code path is the same as for user space irqchip mode. And second, there is nothing to loose if a pending NMI is overwritten by another one (in contrast to IRQs where we have to save the number). Actually, there is even the risk of raising spurious NMIs this way because the reason for the held-back NMI might already be handled while processing the first one. Therefore this patch creates a simplified user space NMI injection interface, exporting it under KVM_CAP_USER_NMI and dropping the old KVM_CAP_NMI capability. And this time we also take care to provide the interface only on archs supporting NMIs via KVM (right now only x86). Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
527 lines
14 KiB
C
527 lines
14 KiB
C
#ifndef __LINUX_KVM_H
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#define __LINUX_KVM_H
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/*
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* Userspace interface for /dev/kvm - kernel based virtual machine
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*
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* Note: you must update KVM_API_VERSION if you change this interface.
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*/
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#include <asm/types.h>
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#include <linux/compiler.h>
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#include <linux/ioctl.h>
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#include <asm/kvm.h>
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#define KVM_API_VERSION 12
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/* for KVM_TRACE_ENABLE */
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struct kvm_user_trace_setup {
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__u32 buf_size; /* sub_buffer size of each per-cpu */
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__u32 buf_nr; /* the number of sub_buffers of each per-cpu */
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};
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/* for KVM_CREATE_MEMORY_REGION */
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struct kvm_memory_region {
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__u32 slot;
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__u32 flags;
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__u64 guest_phys_addr;
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__u64 memory_size; /* bytes */
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};
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/* for KVM_SET_USER_MEMORY_REGION */
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struct kvm_userspace_memory_region {
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__u32 slot;
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__u32 flags;
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__u64 guest_phys_addr;
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__u64 memory_size; /* bytes */
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__u64 userspace_addr; /* start of the userspace allocated memory */
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};
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/* for kvm_memory_region::flags */
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#define KVM_MEM_LOG_DIRTY_PAGES 1UL
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/* for KVM_IRQ_LINE */
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struct kvm_irq_level {
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/*
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* ACPI gsi notion of irq.
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* For IA-64 (APIC model) IOAPIC0: irq 0-23; IOAPIC1: irq 24-47..
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* For X86 (standard AT mode) PIC0/1: irq 0-15. IOAPIC0: 0-23..
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*/
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__u32 irq;
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__u32 level;
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};
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struct kvm_irqchip {
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__u32 chip_id;
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__u32 pad;
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union {
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char dummy[512]; /* reserving space */
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#ifdef CONFIG_X86
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struct kvm_pic_state pic;
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#endif
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#if defined(CONFIG_X86) || defined(CONFIG_IA64)
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struct kvm_ioapic_state ioapic;
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#endif
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} chip;
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};
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#define KVM_EXIT_UNKNOWN 0
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#define KVM_EXIT_EXCEPTION 1
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#define KVM_EXIT_IO 2
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#define KVM_EXIT_HYPERCALL 3
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#define KVM_EXIT_DEBUG 4
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#define KVM_EXIT_HLT 5
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#define KVM_EXIT_MMIO 6
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#define KVM_EXIT_IRQ_WINDOW_OPEN 7
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#define KVM_EXIT_SHUTDOWN 8
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#define KVM_EXIT_FAIL_ENTRY 9
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#define KVM_EXIT_INTR 10
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#define KVM_EXIT_SET_TPR 11
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#define KVM_EXIT_TPR_ACCESS 12
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#define KVM_EXIT_S390_SIEIC 13
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#define KVM_EXIT_S390_RESET 14
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#define KVM_EXIT_DCR 15
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#define KVM_EXIT_NMI 16
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/* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
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struct kvm_run {
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/* in */
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__u8 request_interrupt_window;
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__u8 padding1[7];
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/* out */
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__u32 exit_reason;
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__u8 ready_for_interrupt_injection;
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__u8 if_flag;
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__u8 padding2[2];
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/* in (pre_kvm_run), out (post_kvm_run) */
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__u64 cr8;
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__u64 apic_base;
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union {
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/* KVM_EXIT_UNKNOWN */
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struct {
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__u64 hardware_exit_reason;
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} hw;
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/* KVM_EXIT_FAIL_ENTRY */
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struct {
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__u64 hardware_entry_failure_reason;
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} fail_entry;
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/* KVM_EXIT_EXCEPTION */
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struct {
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__u32 exception;
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__u32 error_code;
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} ex;
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/* KVM_EXIT_IO */
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struct kvm_io {
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#define KVM_EXIT_IO_IN 0
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#define KVM_EXIT_IO_OUT 1
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__u8 direction;
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__u8 size; /* bytes */
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__u16 port;
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__u32 count;
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__u64 data_offset; /* relative to kvm_run start */
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} io;
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struct {
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} debug;
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/* KVM_EXIT_MMIO */
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struct {
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__u64 phys_addr;
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__u8 data[8];
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__u32 len;
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__u8 is_write;
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} mmio;
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/* KVM_EXIT_HYPERCALL */
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struct {
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__u64 nr;
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__u64 args[6];
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__u64 ret;
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__u32 longmode;
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__u32 pad;
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} hypercall;
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/* KVM_EXIT_TPR_ACCESS */
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struct {
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__u64 rip;
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__u32 is_write;
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__u32 pad;
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} tpr_access;
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/* KVM_EXIT_S390_SIEIC */
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struct {
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__u8 icptcode;
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__u64 mask; /* psw upper half */
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__u64 addr; /* psw lower half */
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__u16 ipa;
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__u32 ipb;
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} s390_sieic;
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/* KVM_EXIT_S390_RESET */
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#define KVM_S390_RESET_POR 1
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#define KVM_S390_RESET_CLEAR 2
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#define KVM_S390_RESET_SUBSYSTEM 4
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#define KVM_S390_RESET_CPU_INIT 8
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#define KVM_S390_RESET_IPL 16
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__u64 s390_reset_flags;
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/* KVM_EXIT_DCR */
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struct {
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__u32 dcrn;
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__u32 data;
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__u8 is_write;
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} dcr;
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/* Fix the size of the union. */
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char padding[256];
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};
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};
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/* for KVM_REGISTER_COALESCED_MMIO / KVM_UNREGISTER_COALESCED_MMIO */
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struct kvm_coalesced_mmio_zone {
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__u64 addr;
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__u32 size;
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__u32 pad;
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};
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struct kvm_coalesced_mmio {
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__u64 phys_addr;
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__u32 len;
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__u32 pad;
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__u8 data[8];
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};
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struct kvm_coalesced_mmio_ring {
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__u32 first, last;
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struct kvm_coalesced_mmio coalesced_mmio[0];
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};
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#define KVM_COALESCED_MMIO_MAX \
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((PAGE_SIZE - sizeof(struct kvm_coalesced_mmio_ring)) / \
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sizeof(struct kvm_coalesced_mmio))
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/* for KVM_TRANSLATE */
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struct kvm_translation {
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/* in */
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__u64 linear_address;
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/* out */
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__u64 physical_address;
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__u8 valid;
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__u8 writeable;
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__u8 usermode;
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__u8 pad[5];
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};
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/* for KVM_INTERRUPT */
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struct kvm_interrupt {
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/* in */
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__u32 irq;
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};
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struct kvm_breakpoint {
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__u32 enabled;
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__u32 padding;
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__u64 address;
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};
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/* for KVM_DEBUG_GUEST */
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struct kvm_debug_guest {
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/* int */
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__u32 enabled;
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__u32 pad;
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struct kvm_breakpoint breakpoints[4];
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__u32 singlestep;
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};
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/* for KVM_GET_DIRTY_LOG */
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struct kvm_dirty_log {
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__u32 slot;
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__u32 padding;
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union {
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void __user *dirty_bitmap; /* one bit per page */
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__u64 padding;
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};
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};
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/* for KVM_SET_SIGNAL_MASK */
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struct kvm_signal_mask {
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__u32 len;
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__u8 sigset[0];
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};
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/* for KVM_TPR_ACCESS_REPORTING */
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struct kvm_tpr_access_ctl {
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__u32 enabled;
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__u32 flags;
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__u32 reserved[8];
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};
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/* for KVM_SET_VAPIC_ADDR */
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struct kvm_vapic_addr {
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__u64 vapic_addr;
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};
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/* for KVM_SET_MPSTATE */
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#define KVM_MP_STATE_RUNNABLE 0
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#define KVM_MP_STATE_UNINITIALIZED 1
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#define KVM_MP_STATE_INIT_RECEIVED 2
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#define KVM_MP_STATE_HALTED 3
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#define KVM_MP_STATE_SIPI_RECEIVED 4
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struct kvm_mp_state {
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__u32 mp_state;
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};
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struct kvm_s390_psw {
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__u64 mask;
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__u64 addr;
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};
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/* valid values for type in kvm_s390_interrupt */
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#define KVM_S390_SIGP_STOP 0xfffe0000u
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#define KVM_S390_PROGRAM_INT 0xfffe0001u
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#define KVM_S390_SIGP_SET_PREFIX 0xfffe0002u
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#define KVM_S390_RESTART 0xfffe0003u
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#define KVM_S390_INT_VIRTIO 0xffff2603u
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#define KVM_S390_INT_SERVICE 0xffff2401u
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#define KVM_S390_INT_EMERGENCY 0xffff1201u
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struct kvm_s390_interrupt {
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__u32 type;
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__u32 parm;
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__u64 parm64;
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};
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#define KVM_TRC_SHIFT 16
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/*
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* kvm trace categories
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*/
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#define KVM_TRC_ENTRYEXIT (1 << KVM_TRC_SHIFT)
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#define KVM_TRC_HANDLER (1 << (KVM_TRC_SHIFT + 1)) /* only 12 bits */
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/*
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* kvm trace action
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*/
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#define KVM_TRC_VMENTRY (KVM_TRC_ENTRYEXIT + 0x01)
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#define KVM_TRC_VMEXIT (KVM_TRC_ENTRYEXIT + 0x02)
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#define KVM_TRC_PAGE_FAULT (KVM_TRC_HANDLER + 0x01)
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#define KVM_TRC_HEAD_SIZE 12
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#define KVM_TRC_CYCLE_SIZE 8
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#define KVM_TRC_EXTRA_MAX 7
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/* This structure represents a single trace buffer record. */
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struct kvm_trace_rec {
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/* variable rec_val
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* is split into:
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* bits 0 - 27 -> event id
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* bits 28 -30 -> number of extra data args of size u32
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* bits 31 -> binary indicator for if tsc is in record
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*/
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__u32 rec_val;
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__u32 pid;
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__u32 vcpu_id;
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union {
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struct {
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__u64 timestamp;
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__u32 extra_u32[KVM_TRC_EXTRA_MAX];
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} __attribute__((packed)) timestamp;
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struct {
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__u32 extra_u32[KVM_TRC_EXTRA_MAX];
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} notimestamp;
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} u;
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};
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#define TRACE_REC_EVENT_ID(val) \
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(0x0fffffff & (val))
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#define TRACE_REC_NUM_DATA_ARGS(val) \
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(0x70000000 & ((val) << 28))
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#define TRACE_REC_TCS(val) \
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(0x80000000 & ((val) << 31))
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#define KVMIO 0xAE
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/*
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* ioctls for /dev/kvm fds:
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*/
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#define KVM_GET_API_VERSION _IO(KVMIO, 0x00)
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#define KVM_CREATE_VM _IO(KVMIO, 0x01) /* returns a VM fd */
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#define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 0x02, struct kvm_msr_list)
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#define KVM_S390_ENABLE_SIE _IO(KVMIO, 0x06)
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/*
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* Check if a kvm extension is available. Argument is extension number,
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* return is 1 (yes) or 0 (no, sorry).
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*/
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#define KVM_CHECK_EXTENSION _IO(KVMIO, 0x03)
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/*
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* Get size for mmap(vcpu_fd)
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*/
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#define KVM_GET_VCPU_MMAP_SIZE _IO(KVMIO, 0x04) /* in bytes */
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#define KVM_GET_SUPPORTED_CPUID _IOWR(KVMIO, 0x05, struct kvm_cpuid2)
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/*
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* ioctls for kvm trace
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*/
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#define KVM_TRACE_ENABLE _IOW(KVMIO, 0x06, struct kvm_user_trace_setup)
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#define KVM_TRACE_PAUSE _IO(KVMIO, 0x07)
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#define KVM_TRACE_DISABLE _IO(KVMIO, 0x08)
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/*
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* Extension capability list.
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*/
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#define KVM_CAP_IRQCHIP 0
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#define KVM_CAP_HLT 1
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#define KVM_CAP_MMU_SHADOW_CACHE_CONTROL 2
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#define KVM_CAP_USER_MEMORY 3
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#define KVM_CAP_SET_TSS_ADDR 4
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#define KVM_CAP_VAPIC 6
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#define KVM_CAP_EXT_CPUID 7
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#define KVM_CAP_CLOCKSOURCE 8
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#define KVM_CAP_NR_VCPUS 9 /* returns max vcpus per vm */
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#define KVM_CAP_NR_MEMSLOTS 10 /* returns max memory slots per vm */
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#define KVM_CAP_PIT 11
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#define KVM_CAP_NOP_IO_DELAY 12
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#define KVM_CAP_PV_MMU 13
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#define KVM_CAP_MP_STATE 14
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#define KVM_CAP_COALESCED_MMIO 15
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#define KVM_CAP_SYNC_MMU 16 /* Changes to host mmap are reflected in guest */
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#if defined(CONFIG_X86)||defined(CONFIG_IA64)
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#define KVM_CAP_DEVICE_ASSIGNMENT 17
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#endif
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#define KVM_CAP_IOMMU 18
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#if defined(CONFIG_X86)
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#define KVM_CAP_DEVICE_MSI 20
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#endif
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/* Bug in KVM_SET_USER_MEMORY_REGION fixed: */
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#define KVM_CAP_DESTROY_MEMORY_REGION_WORKS 21
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#if defined(CONFIG_X86)
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#define KVM_CAP_USER_NMI 22
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#endif
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/*
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* ioctls for VM fds
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*/
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#define KVM_SET_MEMORY_REGION _IOW(KVMIO, 0x40, struct kvm_memory_region)
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#define KVM_SET_NR_MMU_PAGES _IO(KVMIO, 0x44)
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#define KVM_GET_NR_MMU_PAGES _IO(KVMIO, 0x45)
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#define KVM_SET_USER_MEMORY_REGION _IOW(KVMIO, 0x46,\
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struct kvm_userspace_memory_region)
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#define KVM_SET_TSS_ADDR _IO(KVMIO, 0x47)
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/*
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* KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns
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* a vcpu fd.
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*/
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#define KVM_CREATE_VCPU _IO(KVMIO, 0x41)
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#define KVM_GET_DIRTY_LOG _IOW(KVMIO, 0x42, struct kvm_dirty_log)
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#define KVM_SET_MEMORY_ALIAS _IOW(KVMIO, 0x43, struct kvm_memory_alias)
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/* Device model IOC */
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#define KVM_CREATE_IRQCHIP _IO(KVMIO, 0x60)
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#define KVM_IRQ_LINE _IOW(KVMIO, 0x61, struct kvm_irq_level)
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#define KVM_GET_IRQCHIP _IOWR(KVMIO, 0x62, struct kvm_irqchip)
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#define KVM_SET_IRQCHIP _IOR(KVMIO, 0x63, struct kvm_irqchip)
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#define KVM_CREATE_PIT _IO(KVMIO, 0x64)
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#define KVM_GET_PIT _IOWR(KVMIO, 0x65, struct kvm_pit_state)
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#define KVM_SET_PIT _IOR(KVMIO, 0x66, struct kvm_pit_state)
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#define KVM_REGISTER_COALESCED_MMIO \
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_IOW(KVMIO, 0x67, struct kvm_coalesced_mmio_zone)
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#define KVM_UNREGISTER_COALESCED_MMIO \
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_IOW(KVMIO, 0x68, struct kvm_coalesced_mmio_zone)
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#define KVM_ASSIGN_PCI_DEVICE _IOR(KVMIO, 0x69, \
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struct kvm_assigned_pci_dev)
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#define KVM_ASSIGN_IRQ _IOR(KVMIO, 0x70, \
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struct kvm_assigned_irq)
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/*
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* ioctls for vcpu fds
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*/
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#define KVM_RUN _IO(KVMIO, 0x80)
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#define KVM_GET_REGS _IOR(KVMIO, 0x81, struct kvm_regs)
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#define KVM_SET_REGS _IOW(KVMIO, 0x82, struct kvm_regs)
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#define KVM_GET_SREGS _IOR(KVMIO, 0x83, struct kvm_sregs)
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#define KVM_SET_SREGS _IOW(KVMIO, 0x84, struct kvm_sregs)
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#define KVM_TRANSLATE _IOWR(KVMIO, 0x85, struct kvm_translation)
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#define KVM_INTERRUPT _IOW(KVMIO, 0x86, struct kvm_interrupt)
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#define KVM_DEBUG_GUEST _IOW(KVMIO, 0x87, struct kvm_debug_guest)
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#define KVM_GET_MSRS _IOWR(KVMIO, 0x88, struct kvm_msrs)
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#define KVM_SET_MSRS _IOW(KVMIO, 0x89, struct kvm_msrs)
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#define KVM_SET_CPUID _IOW(KVMIO, 0x8a, struct kvm_cpuid)
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#define KVM_SET_SIGNAL_MASK _IOW(KVMIO, 0x8b, struct kvm_signal_mask)
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#define KVM_GET_FPU _IOR(KVMIO, 0x8c, struct kvm_fpu)
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#define KVM_SET_FPU _IOW(KVMIO, 0x8d, struct kvm_fpu)
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#define KVM_GET_LAPIC _IOR(KVMIO, 0x8e, struct kvm_lapic_state)
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#define KVM_SET_LAPIC _IOW(KVMIO, 0x8f, struct kvm_lapic_state)
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#define KVM_SET_CPUID2 _IOW(KVMIO, 0x90, struct kvm_cpuid2)
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#define KVM_GET_CPUID2 _IOWR(KVMIO, 0x91, struct kvm_cpuid2)
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/* Available with KVM_CAP_VAPIC */
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#define KVM_TPR_ACCESS_REPORTING _IOWR(KVMIO, 0x92, struct kvm_tpr_access_ctl)
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/* Available with KVM_CAP_VAPIC */
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#define KVM_SET_VAPIC_ADDR _IOW(KVMIO, 0x93, struct kvm_vapic_addr)
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/* valid for virtual machine (for floating interrupt)_and_ vcpu */
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#define KVM_S390_INTERRUPT _IOW(KVMIO, 0x94, struct kvm_s390_interrupt)
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/* store status for s390 */
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#define KVM_S390_STORE_STATUS_NOADDR (-1ul)
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#define KVM_S390_STORE_STATUS_PREFIXED (-2ul)
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#define KVM_S390_STORE_STATUS _IOW(KVMIO, 0x95, unsigned long)
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/* initial ipl psw for s390 */
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#define KVM_S390_SET_INITIAL_PSW _IOW(KVMIO, 0x96, struct kvm_s390_psw)
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/* initial reset for s390 */
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#define KVM_S390_INITIAL_RESET _IO(KVMIO, 0x97)
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#define KVM_GET_MP_STATE _IOR(KVMIO, 0x98, struct kvm_mp_state)
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#define KVM_SET_MP_STATE _IOW(KVMIO, 0x99, struct kvm_mp_state)
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/* Available with KVM_CAP_NMI */
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#define KVM_NMI _IO(KVMIO, 0x9a)
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#define KVM_TRC_INJ_VIRQ (KVM_TRC_HANDLER + 0x02)
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#define KVM_TRC_REDELIVER_EVT (KVM_TRC_HANDLER + 0x03)
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#define KVM_TRC_PEND_INTR (KVM_TRC_HANDLER + 0x04)
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#define KVM_TRC_IO_READ (KVM_TRC_HANDLER + 0x05)
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#define KVM_TRC_IO_WRITE (KVM_TRC_HANDLER + 0x06)
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#define KVM_TRC_CR_READ (KVM_TRC_HANDLER + 0x07)
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#define KVM_TRC_CR_WRITE (KVM_TRC_HANDLER + 0x08)
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#define KVM_TRC_DR_READ (KVM_TRC_HANDLER + 0x09)
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#define KVM_TRC_DR_WRITE (KVM_TRC_HANDLER + 0x0A)
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#define KVM_TRC_MSR_READ (KVM_TRC_HANDLER + 0x0B)
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#define KVM_TRC_MSR_WRITE (KVM_TRC_HANDLER + 0x0C)
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#define KVM_TRC_CPUID (KVM_TRC_HANDLER + 0x0D)
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#define KVM_TRC_INTR (KVM_TRC_HANDLER + 0x0E)
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#define KVM_TRC_NMI (KVM_TRC_HANDLER + 0x0F)
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#define KVM_TRC_VMMCALL (KVM_TRC_HANDLER + 0x10)
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#define KVM_TRC_HLT (KVM_TRC_HANDLER + 0x11)
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#define KVM_TRC_CLTS (KVM_TRC_HANDLER + 0x12)
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#define KVM_TRC_LMSW (KVM_TRC_HANDLER + 0x13)
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#define KVM_TRC_APIC_ACCESS (KVM_TRC_HANDLER + 0x14)
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#define KVM_TRC_TDP_FAULT (KVM_TRC_HANDLER + 0x15)
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#define KVM_TRC_GTLB_WRITE (KVM_TRC_HANDLER + 0x16)
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#define KVM_TRC_STLB_WRITE (KVM_TRC_HANDLER + 0x17)
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#define KVM_TRC_STLB_INVAL (KVM_TRC_HANDLER + 0x18)
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#define KVM_TRC_PPC_INSTR (KVM_TRC_HANDLER + 0x19)
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struct kvm_assigned_pci_dev {
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__u32 assigned_dev_id;
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__u32 busnr;
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__u32 devfn;
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__u32 flags;
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union {
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__u32 reserved[12];
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};
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};
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struct kvm_assigned_irq {
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__u32 assigned_dev_id;
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__u32 host_irq;
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__u32 guest_irq;
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__u32 flags;
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union {
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struct {
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__u32 addr_lo;
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__u32 addr_hi;
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__u32 data;
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} guest_msi;
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__u32 reserved[12];
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};
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};
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#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
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#define KVM_DEV_IRQ_ASSIGN_ENABLE_MSI (1 << 0)
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#endif
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