1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2024 Arm Ltd
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/types.h>
29 #include <sys/systm.h>
30
31 #include <machine/ifunc.h>
32
33 #include "arm64.h"
34 #include "vmm_handlers.h"
35
36 /* Read an EL2 register */
37 static uint64_t
vmm_nvhe_read_reg(uint64_t reg)38 vmm_nvhe_read_reg(uint64_t reg)
39 {
40 return (vmm_call_hyp(HYP_READ_REGISTER, reg));
41 }
42
43 DEFINE_IFUNC(, uint64_t, vmm_read_reg, (uint64_t reg))
44 {
45 if (in_vhe())
46 return (vmm_vhe_read_reg);
47 return (vmm_nvhe_read_reg);
48 }
49
50 /* Enter the guest */
51 static uint64_t
vmm_nvhe_enter_guest(struct hyp * hyp,struct hypctx * hypctx)52 vmm_nvhe_enter_guest(struct hyp *hyp, struct hypctx *hypctx)
53 {
54 return (vmm_call_hyp(HYP_ENTER_GUEST, hyp->el2_addr, hypctx->el2_addr));
55 }
56
57 DEFINE_IFUNC(, uint64_t, vmm_enter_guest,
58 (struct hyp *hyp, struct hypctx *hypctx))
59 {
60 if (in_vhe())
61 return (vmm_vhe_enter_guest);
62 return (vmm_nvhe_enter_guest);
63 }
64
65 /* Clean the TLB for all guests */
66 static void
vmm_nvhe_clean_s2_tlbi(void)67 vmm_nvhe_clean_s2_tlbi(void)
68 {
69 vmm_call_hyp(HYP_CLEAN_S2_TLBI);
70 }
71
72 DEFINE_IFUNC(, void, vmm_clean_s2_tlbi, (void))
73 {
74 if (in_vhe())
75 return (vmm_vhe_clean_s2_tlbi);
76 return (vmm_nvhe_clean_s2_tlbi);
77 }
78
79 /*
80 * Switch to a guest vttbr and clean the TLB for a range of guest
81 * virtual address space.
82 */
83 static void
vmm_nvhe_s2_tlbi_range(uint64_t vttbr,vm_offset_t sva,vm_offset_t eva,bool final_only)84 vmm_nvhe_s2_tlbi_range(uint64_t vttbr, vm_offset_t sva, vm_offset_t eva,
85 bool final_only)
86 {
87 vmm_call_hyp(HYP_S2_TLBI_RANGE, vttbr, sva, eva, final_only);
88 }
89
90 DEFINE_IFUNC(, void, vmm_s2_tlbi_range,
91 (uint64_t vttbr, vm_offset_t sva, vm_offset_t eva, bool final_only))
92 {
93 if (in_vhe())
94 return (vmm_vhe_s2_tlbi_range);
95 return (vmm_nvhe_s2_tlbi_range);
96 }
97
98 /*
99 * Switch to a guest vttbr and clean the TLB for all the guest
100 * virtual address space.
101 */
102 static void
vmm_nvhe_s2_tlbi_all(uint64_t vttbr)103 vmm_nvhe_s2_tlbi_all(uint64_t vttbr)
104 {
105 vmm_call_hyp(HYP_S2_TLBI_ALL, vttbr);
106 }
107
108 DEFINE_IFUNC(, void, vmm_s2_tlbi_all, (uint64_t vttbr))
109 {
110 if (in_vhe())
111 return (vmm_vhe_s2_tlbi_all);
112 return (vmm_nvhe_s2_tlbi_all);
113 }
114