31:0

1h

RO

Graphics System Event Scratch Trigger (SYS_​PAGE_​SIZES)

This field defines the page size the system will use to map the VFs memory addresses.
Software must set the value of the System Page Size to one of the page sizes set in the Supported Page Sizes field.
As with Supported Page Sizes, if bit nis Set in System Page Size, the VFs associated with this PF are required to support a page size of 2^(n+12).
For example, if bit 1 is Set, the system is using an 8-KB page size.
The results are undefined if System Page Size is zero. The results are undefined if more than one bit is set in System Page Size.
The results are undefined if a bit is Set in System Page Size that is not Set in Supported Page Sizes.
When System Page Size is set, the VF associated with this PF is required to align all BAR resources 20 on a System Page Size boundary.
Each VF BARn or VF BARn pair shall be aligned on a System Page Size boundary.
Each VF BARn or VF BARn pair defining a non-zero address space shall be sized to consume an integer multiple of System Page Size bytes.
All data structures requiring page size alignment within a VF shall be aligned on a System Page Size boundary.
VF Enable must be zero when System Page Size is written.
The results are undefined if System Page Size is written when VF Enable is Set.
Default value is 1h (i.e. 4KB), and that is the only value allowed for this implementation