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min_scratch_size

hyperlight_common::layout

Function min_scratch_size 

Source 
pub fn min_scratch_size(
    input_data_size: usize,
    output_data_size: usize,
) -> usize
Expand description

Compute the minimum scratch region size needed for a sandbox. On amd64, this is:

  • Two pages for the TSS and IDT
  • (up to) 4 pages for the PTEs for mapping that (including CoW’ing the root PT)
  • A page for the smallest possible non-exception stack
  • (up to) 3 pages for mapping that
  • Two pages for the exception stack and metadata
  • A page-aligned amount of memory for I/O buffers (for now)