On 10/20/25 11:55 AM, Joel Fernandes wrote:
> Add data structures and helpers for page table management. Uses
> bitfield for cleanly representing and accessing the bitfields in the
> structures.
>
...
> +bitfield! {
> + pub(crate) struct Pte(u64), "Page Table Entry (PTE) to map virtual pages
> to physical frames." {
> + 0:0 valid as bool; // (1 = valid for PTEs)
> + 1:1 privilege as bool; // P - Privileged/kernel-only
> access
> + 2:2 read_only as bool; // RO - Write protection
> + 3:3 atomic_disable as bool; // AD - Disable atomic ops
> + 4:4 encrypted as bool; // E - Encryption enabled
> + 39:8 frame_number as u64; // PA[39:8] - Physical frame
> number (32 bits)
> + 41:40 aperture as u8 => AperturePte; // Memory aperture
> type.
> + 42:42 volatile as bool; // VOL - Volatile flag
> + 50:43 kind as u8; // K[7:0] - Compression/tiling
> kind
> + 63:51 comptag_line as u16; // CTL[12:0] - Compression tag
> line
> + }
> +}
Hi Joel,
What GPUs is this good for? I ask because I seem to recall that
the format has changed over the years, on a per-GPU-architecture
basis...
thanks,
--
John Hubbard
