GICV_PMR, Virtual Machine Priority Mask Register

The GICV_PMR characteristics are:

Purpose

This register provides a virtual interrupt priority filter. Only virtual interrupts with a higher priority than the value in this register are signaled to the PE.

Note

Higher interrupt priority corresponds to a lower value of the Priority field.

This register corresponds to the physical CPU interface register GICC_PMR.

This register is part of the GIC virtual CPU interface registers functional group.

Usage constraints

This register is accessible as follows:

Security disabledSecureNon-secure
RWRWRW

This register is used only when System register access is not enabled. When System register access is enabled:

Configuration

RW fields in this register reset to architecturally UNKNOWN values.

This register is available when the GIC implementation supports interrupt virtualization.

The Priority field of this register is aliased to GICH_VMCR.VMPR, to enable state to be switched easily between virtual machines during context-switching.

Attributes

GICV_PMR is a 32-bit register.

Field descriptions

The GICV_PMR bit assignments are:

313029282726252423222120191817161514131211109876543210
000000000000000000000000Priority

Bits [31:8]

Reserved, RES0.

Priority, bits [7:0]

The priority mask level for the virtual CPU interface. If the priority of the interrupt is higher than the value indicated by this field, the interface signals the interrupt to the PE.

If the GIC implementation supports fewer than 256 priority levels some bits might be RAZ/WI, as follows:

See Interrupt prioritization, section 4.8 of the GICv3 Architecture Specification for more information.

When this register has an architecturally-defined reset value, this field resets to a value that is architecturally UNKNOWN.

Accessing the GICV_PMR

GICV_PMR can be accessed through its memory-mapped interface:

ComponentOffset
GIC Virtual CPU interface 0x0004



02/05/2017 15:43

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