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
|
// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2020 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package builtin
// https://docs.broadcom.com/doc/12358545
// https://github.com/raspberrypi/linux/tree/rpi-5.4.y/drivers/char/broadcom
const vcioSummary = `allows access to VideoCore I/O`
// The raspberry pi allows programming its GPU from userspace via the /dev/vcio
// device. These operations should be considered privileged since the driver
// assumes trusted input, therefore require manual connection.
const vcioBaseDeclarationSlots = `
vcio:
allow-installation:
slot-snap-type:
- core
deny-auto-connection: true
`
const vcioConnectedPlugAppArmor = `
# Description: Can access to vcio.
# vcio v1 access to ARM VideoCore (BCM_VCIO) for userspace GPU programming
/dev/vcio rw,
/sys/devices/virtual/bcm2708_vcio/vcio/** r,
# the vcio driver uses dynamic allocation for its major number and
# https://www.kernel.org/doc/Documentation/admin-guide/devices.txt lists
# 234-254 char as "RESERVED FOR DYNAMIC ASSIGNMENT".
/run/udev/data/c23[4-9]:[0-9]* r,
/run/udev/data/c24[0-9]:[0-9]* r,
/run/udev/data/c25[0-4]:[0-9]* r,
`
var vcioConnectedPlugUDev = []string{
`SUBSYSTEM=="bcm2708_vcio", KERNEL=="vcio"`,
}
func init() {
registerIface(&commonInterface{
name: "vcio",
summary: vcioSummary,
implicitOnCore: true,
implicitOnClassic: true,
baseDeclarationSlots: vcioBaseDeclarationSlots,
connectedPlugAppArmor: vcioConnectedPlugAppArmor,
connectedPlugUDev: vcioConnectedPlugUDev,
})
}
|
