/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* 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.
*/
#ifndef _VMX_MSR_H_
#define _VMX_MSR_H_
struct vmx;
void vmx_msr_init(void);
void vmx_msr_guest_init(struct vmx *vmx, struct vmx_vcpu *vcpu);
void vmx_msr_guest_enter_tsc_aux(struct vmx *vmx, struct vmx_vcpu *vcpu);
void vmx_msr_guest_enter(struct vmx_vcpu *vcpu);
void vmx_msr_guest_exit(struct vmx_vcpu *vcpu);
void vmx_msr_guest_exit_tsc_aux(struct vmx *vmx, struct vmx_vcpu *vcpu);
int vmx_rdmsr(struct vmx_vcpu *vcpu, u_int num, uint64_t *val, bool *retu);
int vmx_wrmsr(struct vmx_vcpu *vcpu, u_int num, uint64_t val, bool *retu);
uint32_t vmx_revision(void);
int vmx_set_ctlreg(int ctl_reg, int true_ctl_reg, uint32_t ones_mask,
uint32_t zeros_mask, uint32_t *retval);
/*
* According to Section 21.10.4 "Software Access to Related Structures",
* changes to data structures pointed to by the VMCS must be made only when
* there is no logical processor with a current VMCS that points to the
* data structure.
*
* This pretty much limits us to configuring the MSR bitmap before VMCS
* initialization for SMP VMs. Unless of course we do it the hard way - which
* would involve some form of synchronization between the vcpus to vmclear
* all VMCSs' that point to the bitmap.
*/
#define MSR_BITMAP_ACCESS_NONE 0x0
#define MSR_BITMAP_ACCESS_READ 0x1
#define MSR_BITMAP_ACCESS_WRITE 0x2
#define MSR_BITMAP_ACCESS_RW (MSR_BITMAP_ACCESS_READ|MSR_BITMAP_ACCESS_WRITE)
void msr_bitmap_initialize(char *bitmap);
int msr_bitmap_change_access(char *bitmap, u_int msr, int access);
#define guest_msr_rw(vmx, msr) \
msr_bitmap_change_access((vmx)->msr_bitmap, (msr), MSR_BITMAP_ACCESS_RW)
#define guest_msr_ro(vmx, msr) \
msr_bitmap_change_access((vmx)->msr_bitmap, (msr), MSR_BITMAP_ACCESS_READ)
#endif
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