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freebsd-nq/sys/amd64/include/vmm_dev.h
Neel Natu d087a39935 Simplify instruction restart logic in bhyve. 
Keep track of the next instruction to be executed by the vcpu as 'nextrip'.
As a result the VM_RUN ioctl no longer takes the %rip where a vcpu should
start execution.

Also, instruction restart happens implicitly via 'vm_inject_exception()' or
explicitly via 'vm_restart_instruction()'. The APIs behave identically in
both kernel and userspace contexts. The main beneficiary is the instruction
emulation code that executes in both contexts.

bhyve(8) VM exit handlers now treat 'vmexit->rip' and 'vmexit->inst_length'
as readonly:
- Restarting an instruction is now done by calling 'vm_restart_instruction()'
  as opposed to setting 'vmexit->inst_length' to 0 (e.g. emulate_inout())
- Resuming vcpu at an arbitrary %rip is now done by setting VM_REG_GUEST_RIP
  as opposed to changing 'vmexit->rip' (e.g. vmexit_task_switch())

Differential Revision:	https://reviews.freebsd.org/D1526
Reviewed by:		grehan
MFC after:		2 weeks
2015-01-18 03:08:30 +00:00

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/*-
* Copyright (c) 2011 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _VMM_DEV_H_
#define _VMM_DEV_H_
#ifdef _KERNEL
void vmmdev_init(void);
int vmmdev_cleanup(void);
#endif
struct vm_memory_segment {
vm_paddr_t gpa; /* in */
size_t len;
int wired;
};
struct vm_register {
int cpuid;
int regnum; /* enum vm_reg_name */
uint64_t regval;
};
struct vm_seg_desc { /* data or code segment */
int cpuid;
int regnum; /* enum vm_reg_name */
struct seg_desc desc;
};
struct vm_run {
int cpuid;
struct vm_exit vm_exit;
};
struct vm_exception {
int cpuid;
int vector;
uint32_t error_code;
int error_code_valid;
int restart_instruction;
};
struct vm_lapic_msi {
uint64_t msg;
uint64_t addr;
};
struct vm_lapic_irq {
int cpuid;
int vector;
};
struct vm_ioapic_irq {
int irq;
};
struct vm_isa_irq {
int atpic_irq;
int ioapic_irq;
};
struct vm_isa_irq_trigger {
int atpic_irq;
enum vm_intr_trigger trigger;
};
struct vm_capability {
int cpuid;
enum vm_cap_type captype;
int capval;
int allcpus;
};
struct vm_pptdev {
int bus;
int slot;
int func;
};
struct vm_pptdev_mmio {
int bus;
int slot;
int func;
vm_paddr_t gpa;
vm_paddr_t hpa;
size_t len;
};
struct vm_pptdev_msi {
int vcpu;
int bus;
int slot;
int func;
int numvec; /* 0 means disabled */
uint64_t msg;
uint64_t addr;
};
struct vm_pptdev_msix {
int vcpu;
int bus;
int slot;
int func;
int idx;
uint64_t msg;
uint32_t vector_control;
uint64_t addr;
};
struct vm_nmi {
int cpuid;
};
#define MAX_VM_STATS 64
struct vm_stats {
int cpuid; /* in */
int num_entries; /* out */
struct timeval tv;
uint64_t statbuf[MAX_VM_STATS];
};
struct vm_stat_desc {
int index; /* in */
char desc[128]; /* out */
};
struct vm_x2apic {
int cpuid;
enum x2apic_state state;
};
struct vm_gpa_pte {
uint64_t gpa; /* in */
uint64_t pte[4]; /* out */
int ptenum;
};
struct vm_hpet_cap {
uint32_t capabilities; /* lower 32 bits of HPET capabilities */
};
struct vm_suspend {
enum vm_suspend_how how;
};
struct vm_gla2gpa {
int vcpuid; /* inputs */
int prot; /* PROT_READ or PROT_WRITE */
uint64_t gla;
struct vm_guest_paging paging;
int fault; /* outputs */
uint64_t gpa;
};
struct vm_activate_cpu {
int vcpuid;
};
struct vm_cpuset {
int which;
int cpusetsize;
cpuset_t *cpus;
};
#define VM_ACTIVE_CPUS 0
#define VM_SUSPENDED_CPUS 1
struct vm_intinfo {
int vcpuid;
uint64_t info1;
uint64_t info2;
};
struct vm_rtc_time {
time_t secs;
};
struct vm_rtc_data {
int offset;
uint8_t value;
};
enum {
/* general routines */
IOCNUM_ABIVERS = 0,
IOCNUM_RUN = 1,
IOCNUM_SET_CAPABILITY = 2,
IOCNUM_GET_CAPABILITY = 3,
IOCNUM_SUSPEND = 4,
IOCNUM_REINIT = 5,
/* memory apis */
IOCNUM_MAP_MEMORY = 10,
IOCNUM_GET_MEMORY_SEG = 11,
IOCNUM_GET_GPA_PMAP = 12,
IOCNUM_GLA2GPA = 13,
/* register/state accessors */
IOCNUM_SET_REGISTER = 20,
IOCNUM_GET_REGISTER = 21,
IOCNUM_SET_SEGMENT_DESCRIPTOR = 22,
IOCNUM_GET_SEGMENT_DESCRIPTOR = 23,
/* interrupt injection */
IOCNUM_GET_INTINFO = 28,
IOCNUM_SET_INTINFO = 29,
IOCNUM_INJECT_EXCEPTION = 30,
IOCNUM_LAPIC_IRQ = 31,
IOCNUM_INJECT_NMI = 32,
IOCNUM_IOAPIC_ASSERT_IRQ = 33,
IOCNUM_IOAPIC_DEASSERT_IRQ = 34,
IOCNUM_IOAPIC_PULSE_IRQ = 35,
IOCNUM_LAPIC_MSI = 36,
IOCNUM_LAPIC_LOCAL_IRQ = 37,
IOCNUM_IOAPIC_PINCOUNT = 38,
IOCNUM_RESTART_INSTRUCTION = 39,
/* PCI pass-thru */
IOCNUM_BIND_PPTDEV = 40,
IOCNUM_UNBIND_PPTDEV = 41,
IOCNUM_MAP_PPTDEV_MMIO = 42,
IOCNUM_PPTDEV_MSI = 43,
IOCNUM_PPTDEV_MSIX = 44,
/* statistics */
IOCNUM_VM_STATS = 50,
IOCNUM_VM_STAT_DESC = 51,
/* kernel device state */
IOCNUM_SET_X2APIC_STATE = 60,
IOCNUM_GET_X2APIC_STATE = 61,
IOCNUM_GET_HPET_CAPABILITIES = 62,
/* legacy interrupt injection */
IOCNUM_ISA_ASSERT_IRQ = 80,
IOCNUM_ISA_DEASSERT_IRQ = 81,
IOCNUM_ISA_PULSE_IRQ = 82,
IOCNUM_ISA_SET_IRQ_TRIGGER = 83,
/* vm_cpuset */
IOCNUM_ACTIVATE_CPU = 90,
IOCNUM_GET_CPUSET = 91,
/* RTC */
IOCNUM_RTC_READ = 100,
IOCNUM_RTC_WRITE = 101,
IOCNUM_RTC_SETTIME = 102,
IOCNUM_RTC_GETTIME = 103,
};
#define VM_RUN \
_IOWR('v', IOCNUM_RUN, struct vm_run)
#define VM_SUSPEND \
_IOW('v', IOCNUM_SUSPEND, struct vm_suspend)
#define VM_REINIT \
_IO('v', IOCNUM_REINIT)
#define VM_MAP_MEMORY \
_IOWR('v', IOCNUM_MAP_MEMORY, struct vm_memory_segment)
#define VM_GET_MEMORY_SEG \
_IOWR('v', IOCNUM_GET_MEMORY_SEG, struct vm_memory_segment)
#define VM_SET_REGISTER \
_IOW('v', IOCNUM_SET_REGISTER, struct vm_register)
#define VM_GET_REGISTER \
_IOWR('v', IOCNUM_GET_REGISTER, struct vm_register)
#define VM_SET_SEGMENT_DESCRIPTOR \
_IOW('v', IOCNUM_SET_SEGMENT_DESCRIPTOR, struct vm_seg_desc)
#define VM_GET_SEGMENT_DESCRIPTOR \
_IOWR('v', IOCNUM_GET_SEGMENT_DESCRIPTOR, struct vm_seg_desc)
#define VM_INJECT_EXCEPTION \
_IOW('v', IOCNUM_INJECT_EXCEPTION, struct vm_exception)
#define VM_LAPIC_IRQ \
_IOW('v', IOCNUM_LAPIC_IRQ, struct vm_lapic_irq)
#define VM_LAPIC_LOCAL_IRQ \
_IOW('v', IOCNUM_LAPIC_LOCAL_IRQ, struct vm_lapic_irq)
#define VM_LAPIC_MSI \
_IOW('v', IOCNUM_LAPIC_MSI, struct vm_lapic_msi)
#define VM_IOAPIC_ASSERT_IRQ \
_IOW('v', IOCNUM_IOAPIC_ASSERT_IRQ, struct vm_ioapic_irq)
#define VM_IOAPIC_DEASSERT_IRQ \
_IOW('v', IOCNUM_IOAPIC_DEASSERT_IRQ, struct vm_ioapic_irq)
#define VM_IOAPIC_PULSE_IRQ \
_IOW('v', IOCNUM_IOAPIC_PULSE_IRQ, struct vm_ioapic_irq)
#define VM_IOAPIC_PINCOUNT \
_IOR('v', IOCNUM_IOAPIC_PINCOUNT, int)
#define VM_ISA_ASSERT_IRQ \
_IOW('v', IOCNUM_ISA_ASSERT_IRQ, struct vm_isa_irq)
#define VM_ISA_DEASSERT_IRQ \
_IOW('v', IOCNUM_ISA_DEASSERT_IRQ, struct vm_isa_irq)
#define VM_ISA_PULSE_IRQ \
_IOW('v', IOCNUM_ISA_PULSE_IRQ, struct vm_isa_irq)
#define VM_ISA_SET_IRQ_TRIGGER \
_IOW('v', IOCNUM_ISA_SET_IRQ_TRIGGER, struct vm_isa_irq_trigger)
#define VM_SET_CAPABILITY \
_IOW('v', IOCNUM_SET_CAPABILITY, struct vm_capability)
#define VM_GET_CAPABILITY \
_IOWR('v', IOCNUM_GET_CAPABILITY, struct vm_capability)
#define VM_BIND_PPTDEV \
_IOW('v', IOCNUM_BIND_PPTDEV, struct vm_pptdev)
#define VM_UNBIND_PPTDEV \
_IOW('v', IOCNUM_UNBIND_PPTDEV, struct vm_pptdev)
#define VM_MAP_PPTDEV_MMIO \
_IOW('v', IOCNUM_MAP_PPTDEV_MMIO, struct vm_pptdev_mmio)
#define VM_PPTDEV_MSI \
_IOW('v', IOCNUM_PPTDEV_MSI, struct vm_pptdev_msi)
#define VM_PPTDEV_MSIX \
_IOW('v', IOCNUM_PPTDEV_MSIX, struct vm_pptdev_msix)
#define VM_INJECT_NMI \
_IOW('v', IOCNUM_INJECT_NMI, struct vm_nmi)
#define VM_STATS \
_IOWR('v', IOCNUM_VM_STATS, struct vm_stats)
#define VM_STAT_DESC \
_IOWR('v', IOCNUM_VM_STAT_DESC, struct vm_stat_desc)
#define VM_SET_X2APIC_STATE \
_IOW('v', IOCNUM_SET_X2APIC_STATE, struct vm_x2apic)
#define VM_GET_X2APIC_STATE \
_IOWR('v', IOCNUM_GET_X2APIC_STATE, struct vm_x2apic)
#define VM_GET_HPET_CAPABILITIES \
_IOR('v', IOCNUM_GET_HPET_CAPABILITIES, struct vm_hpet_cap)
#define VM_GET_GPA_PMAP \
_IOWR('v', IOCNUM_GET_GPA_PMAP, struct vm_gpa_pte)
#define VM_GLA2GPA \
_IOWR('v', IOCNUM_GLA2GPA, struct vm_gla2gpa)
#define VM_ACTIVATE_CPU \
_IOW('v', IOCNUM_ACTIVATE_CPU, struct vm_activate_cpu)
#define VM_GET_CPUS \
_IOW('v', IOCNUM_GET_CPUSET, struct vm_cpuset)
#define VM_SET_INTINFO \
_IOW('v', IOCNUM_SET_INTINFO, struct vm_intinfo)
#define VM_GET_INTINFO \
_IOWR('v', IOCNUM_GET_INTINFO, struct vm_intinfo)
#define VM_RTC_WRITE \
_IOW('v', IOCNUM_RTC_WRITE, struct vm_rtc_data)
#define VM_RTC_READ \
_IOWR('v', IOCNUM_RTC_READ, struct vm_rtc_data)
#define VM_RTC_SETTIME \
_IOW('v', IOCNUM_RTC_SETTIME, struct vm_rtc_time)
#define VM_RTC_GETTIME \
_IOR('v', IOCNUM_RTC_GETTIME, struct vm_rtc_time)
#define VM_RESTART_INSTRUCTION \
_IOW('v', IOCNUM_RESTART_INSTRUCTION, int)
#endif
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