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 * Copyright 2021 Oxide Computer Company 32 */ 33 34 #ifndef _VMX_MSR_H_ 35 #define _VMX_MSR_H_ 36 37 void vmx_msr_init(void); 38 void vmx_msr_guest_init(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 vm_msr_result_t vmx_rdmsr(struct vmx *, int, uint32_t, uint64_t *); 42 vm_msr_result_t vmx_wrmsr(struct vmx *, int, uint32_t, uint64_t); 43 44 int vmx_set_ctlreg(int ctl_reg, int true_ctl_reg, uint32_t ones_mask, 45 uint32_t zeros_mask, uint32_t *retval); 46 47 /* 48 * According to Section 21.10.4 "Software Access to Related Structures", 49 * changes to data structures pointed to by the VMCS must be made only when 50 * there is no logical processor with a current VMCS that points to the 51 * data structure. 52 * 53 * This pretty much limits us to configuring the MSR bitmap before VMCS 54 * initialization for SMP VMs. Unless of course we do it the hard way - which 55 * would involve some form of synchronization between the vcpus to vmclear 56 * all VMCSs' that point to the bitmap. 57 */ 58 #define MSR_BITMAP_ACCESS_NONE 0x0 59 #define MSR_BITMAP_ACCESS_READ 0x1 60 #define MSR_BITMAP_ACCESS_WRITE 0x2 61 #define MSR_BITMAP_ACCESS_RW (MSR_BITMAP_ACCESS_READ|MSR_BITMAP_ACCESS_WRITE) 62 void vmx_msr_bitmap_initialize(struct vmx *); 63 void vmx_msr_bitmap_destroy(struct vmx *); 64 void vmx_msr_bitmap_change_access(struct vmx *, int, uint_t, int); 65 66 #define guest_msr_rw(vmx, vcpuid, msr) \ 67 vmx_msr_bitmap_change_access((vmx), (vcpuid), (msr), MSR_BITMAP_ACCESS_RW) 68 69 #define guest_msr_ro(vmx, vcpuid, msr) \ 70 vmx_msr_bitmap_change_access((vmx), (vcpuid), (msr), MSR_BITMAP_ACCESS_READ) 71 72 #endif 73