1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 NetApp, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _VMX_MSR_H_ 32 #define _VMX_MSR_H_ 33 34 struct vmx; 35 36 void vmx_msr_init(void); 37 void vmx_msr_guest_init(struct vmx *vmx, int vcpuid); 38 void vmx_msr_guest_enter_tsc_aux(struct vmx *vmx, int vcpuid); 39 void vmx_msr_guest_enter(struct vmx *vmx, int vcpuid); 40 void vmx_msr_guest_exit(struct vmx *vmx, int vcpuid); 41 void vmx_msr_guest_exit_tsc_aux(struct vmx *vmx, int vcpuid); 42 int vmx_rdmsr(struct vmx *, int vcpuid, u_int num, uint64_t *val, bool *retu); 43 int vmx_wrmsr(struct vmx *, int vcpuid, u_int num, uint64_t val, bool *retu); 44 45 uint32_t vmx_revision(void); 46 47 int vmx_set_ctlreg(int ctl_reg, int true_ctl_reg, uint32_t ones_mask, 48 uint32_t zeros_mask, uint32_t *retval); 49 50 /* 51 * According to Section 21.10.4 "Software Access to Related Structures", 52 * changes to data structures pointed to by the VMCS must be made only when 53 * there is no logical processor with a current VMCS that points to the 54 * data structure. 55 * 56 * This pretty much limits us to configuring the MSR bitmap before VMCS 57 * initialization for SMP VMs. Unless of course we do it the hard way - which 58 * would involve some form of synchronization between the vcpus to vmclear 59 * all VMCSs' that point to the bitmap. 60 */ 61 #define MSR_BITMAP_ACCESS_NONE 0x0 62 #define MSR_BITMAP_ACCESS_READ 0x1 63 #define MSR_BITMAP_ACCESS_WRITE 0x2 64 #define MSR_BITMAP_ACCESS_RW (MSR_BITMAP_ACCESS_READ|MSR_BITMAP_ACCESS_WRITE) 65 void msr_bitmap_initialize(char *bitmap); 66 int msr_bitmap_change_access(char *bitmap, u_int msr, int access); 67 68 #define guest_msr_rw(vmx, msr) \ 69 msr_bitmap_change_access((vmx)->msr_bitmap, (msr), MSR_BITMAP_ACCESS_RW) 70 71 #define guest_msr_ro(vmx, msr) \ 72 msr_bitmap_change_access((vmx)->msr_bitmap, (msr), MSR_BITMAP_ACCESS_READ) 73 74 #endif 75