d087a39935
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
56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*-
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _FBSDRUN_H_
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#define _FBSDRUN_H_
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#ifndef CTASSERT /* Allow lint to override */
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#define CTASSERT(x) _CTASSERT(x, __LINE__)
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#define _CTASSERT(x, y) __CTASSERT(x, y)
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#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
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#endif
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#define VMEXIT_CONTINUE (0)
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#define VMEXIT_ABORT (-1)
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struct vmctx;
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extern int guest_ncpus;
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extern char *guest_uuid_str;
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extern char *vmname;
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void *paddr_guest2host(struct vmctx *ctx, uintptr_t addr, size_t len);
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void fbsdrun_set_capabilities(struct vmctx *ctx, int cpu);
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void fbsdrun_addcpu(struct vmctx *ctx, int fromcpu, int newcpu, uint64_t rip);
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int fbsdrun_muxed(void);
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int fbsdrun_vmexit_on_hlt(void);
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int fbsdrun_vmexit_on_pause(void);
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int fbsdrun_disable_x2apic(void);
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int fbsdrun_virtio_msix(void);
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#endif
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