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selinux/secilc/docs/cil_xen_statements.md
bauen1 057d72af2d secilc/docs: use fenced code blocks for cil examples 
Also fixes the occasional missing brackets as higlighted by my editor,
however the individual examples where not reviewed much closer.

secilc was chosen as language name because the compiler is named secilc
and outside of SELinux the name cil is less searchable and could lead to
confusion.

Signed-off-by: Jonathan Hettwer <j2468h@gmail.com>
2021-02-16 09:32:29 -05:00

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Xen Statements

Policy version 30 introduced the devicetreecon statement and also expanded the existing I/O memory range to 64 bits in order to support hardware with more than 44 bits of physical address space (32-bit count of 4K pages).

See the "XSM/FLASK Configuration" document for further information ()

iomemcon

Label i/o memory. This may be a single memory location or a range.

Statement definition:

    (iomemcon mem_addr|(mem_low mem_high) context_id)

Where:

iomemcon

The iomemcon keyword.

mem_addr |

(mem_low mem_high)

A single memory address to apply the context, or a range of addresses.

The entries must consist of numerics [0-9].

context_id

A previously declared context identifier or an anonymous security context (user role type levelrange), the range MUST be defined whether the policy is MLS/MCS enabled or not.

Example:

An anonymous context for a memory address range of 0xfebe0-0xfebff:

    (iomemcon (1043424 1043455) (unconfined.user object_r unconfined.object low_low))

ioportcon

Label i/o ports. This may be a single port or a range.

Statement definition:

    (ioportcon port|(port_low port_high) context_id)

Where:

ioportcon

The ioportcon keyword.

port |

(port_low port_high)

A single port to apply the context, or a range of ports.

The entries must consist of numerics [0-9].

context_id

A previously declared context identifier or an anonymous security context (user role type levelrange), the range MUST be defined whether the policy is MLS/MCS enabled or not.

Example:

An anonymous context for a single port of :0xecc0:

    (ioportcon 60608 (unconfined.user object_r unconfined.object low_low))

pcidevicecon

Label a PCI device.

Statement definition:

    (pcidevicecon device context_id)

Where:

pcidevicecon

The pcidevicecon keyword.

device

The device number.The entries must consist of numerics [0-9].

context_id

A previously declared context identifier or an anonymous security context (user role type levelrange), the range MUST be defined whether the policy is MLS/MCS enabled or not.

Example:

An anonymous context for a pci device address of 0xc800:

    (pcidevicecon 51200 (unconfined.user object_r unconfined.object low_low))

pirqcon

Label an interrupt level.

Statement definition:

    (pirqcon irq_level context_id)

Where:

pirqcon

The pirqcon keyword.

irq_level

The interrupt request number. The entries must consist of numerics [0-9].

context_id

A previously declared context identifier or an anonymous security context (user role type levelrange), the range MUST be defined whether the policy is MLS/MCS enabled or not.

Example:

An anonymous context for IRQ 33:

    (pirqcon 33 (unconfined.user object_r unconfined.object low_low))

devicetreecon

Label device tree nodes.

Statement definition:

    (devicetreecon path context_id)

Where:

devicetreecon

The devicetreecon keyword.

path

The device tree path. If this contains spaces enclose within "".

context_id

A previously declared context identifier or an anonymous security context (user role type levelrange), the range MUST be defined whether the policy is MLS/MCS enabled or not.

Example:

An anonymous context for the specified path:

    (devicetreecon "/this is/a/path" (unconfined.user object_r unconfined.object low_low))