github.com/kubiko/snapd@v0.0.0-20201013125620-d4f3094d9ddf/interfaces/builtin/physical_memory_control.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2016-2017 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package builtin
    21  
    22  const physicalMemoryControlSummary = `allows write access to all physical memory`
    23  
    24  const physicalMemoryControlBaseDeclarationSlots = `
    25    physical-memory-control:
    26      allow-installation:
    27        slot-snap-type:
    28          - core
    29      deny-auto-connection: true
    30  `
    31  
    32  const physicalMemoryControlConnectedPlugAppArmor = `
    33  # Description: With kernels with STRICT_DEVMEM=n, write access to all physical
    34  # memory.
    35  #
    36  # With STRICT_DEVMEM=y, allow writing to /dev/mem to access
    37  # architecture-specific subset of the physical address (eg, PCI space,
    38  # BIOS code and data regions on x86, etc) for all common uses of /dev/mem
    39  # (eg, X without KMS, dosemu, etc).
    40  capability sys_rawio,
    41  /dev/mem rw,
    42  `
    43  
    44  var physicalMemoryControlConnectedPlugUDev = []string{`KERNEL=="mem"`}
    45  
    46  func init() {
    47  	registerIface(&commonInterface{
    48  		name:                  "physical-memory-control",
    49  		summary:               physicalMemoryControlSummary,
    50  		implicitOnCore:        true,
    51  		implicitOnClassic:     true,
    52  		baseDeclarationSlots:  physicalMemoryControlBaseDeclarationSlots,
    53  		connectedPlugAppArmor: physicalMemoryControlConnectedPlugAppArmor,
    54  		connectedPlugUDev:     physicalMemoryControlConnectedPlugUDev,
    55  	})
    56  }