mshv_bindings/x86_64/
unmarshal.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
// Copyright © 2020, Microsoft Corporation
//
// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
//
use crate::bindings::*;
use vmm_sys_util::errno;

type Result<T> = std::result::Result<T, errno::Error>;
// hv_message implementation for unmarshaling payload
impl hv_message {
    #[inline]
    pub fn to_cpuid_info(&self) -> Result<hv_x64_cpuid_intercept_message> {
        if self.header.message_type != hv_message_type_HVMSG_X64_CPUID_INTERCEPT {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_memory_info(&self) -> Result<hv_x64_memory_intercept_message> {
        if self.header.message_type != hv_message_type_HVMSG_GPA_INTERCEPT
            && self.header.message_type != hv_message_type_HVMSG_UNMAPPED_GPA
            && self.header.message_type != hv_message_type_HVMSG_UNACCEPTED_GPA
        {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_gpa_attribute_info(&self) -> Result<hv_x64_gpa_attribute_intercept_message> {
        if self.header.message_type != hv_message_type_HVMSG_GPA_ATTRIBUTE_INTERCEPT {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_ioport_info(&self) -> Result<hv_x64_io_port_intercept_message> {
        if self.header.message_type != hv_message_type_HVMSG_X64_IO_PORT_INTERCEPT {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_msr_info(&self) -> Result<hv_x64_msr_intercept_message> {
        if self.header.message_type != hv_message_type_HVMSG_X64_MSR_INTERCEPT {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_exception_info(&self) -> Result<hv_x64_exception_intercept_message> {
        if self.header.message_type != hv_message_type_HVMSG_X64_EXCEPTION_INTERCEPT {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_invalid_vp_register_info(&self) -> Result<hv_x64_invalid_vp_register_message> {
        if self.header.message_type != hv_message_type_HVMSG_INVALID_VP_REGISTER_VALUE {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_unrecoverable_exception_info(
        &self,
    ) -> Result<hv_x64_unrecoverable_exception_message> {
        if self.header.message_type != hv_message_type_HVMSG_UNRECOVERABLE_EXCEPTION {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_interruption_deliverable_info(
        &self,
    ) -> Result<hv_x64_interruption_deliverable_message> {
        if self.header.message_type != hv_message_type_HVMSG_X64_INTERRUPTION_DELIVERABLE {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_apic_eoi_info(&self) -> Result<hv_x64_apic_eoi_message> {
        if self.header.message_type != hv_message_type_HVMSG_X64_APIC_EOI {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_hypercall_intercept_info(&self) -> Result<hv_x64_hypercall_intercept_message> {
        if self.header.message_type != hv_message_type_HVMSG_HYPERCALL_INTERCEPT {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_sint_deliverable_info(&self) -> Result<hv_x64_sint_deliverable_message> {
        if self.header.message_type != hv_message_type_HVMSG_SYNIC_SINT_DELIVERABLE {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }

    #[inline]
    pub fn to_vmg_intercept_info(&self) -> Result<hv_x64_vmgexit_intercept_message> {
        if self.header.message_type != hv_message_type_HVMSG_X64_SEV_VMGEXIT_INTERCEPT {
            return Err(errno::Error::new(libc::EINVAL));
        }
        // SAFETY: We know at this point the payload is of the correct type. The payload field is
        // unaligned. We use addr_of! to safely create a pointer, then call read_unaligned for
        // copying its content out.
        let ret =
            unsafe { std::ptr::read_unaligned(std::ptr::addr_of!(self.u.payload) as *const _) };
        Ok(ret)
    }
}