vx_start.S: Swizzle stack space

Striding stack space for threads by power-of-two risks possibilities of bank conflicts or cache aliasing problems. Add an extra offset of 4 bytes to avoid this.
2024-03-29 12:24:55 -07:00
parent fa2b6e2ad0
commit b0c1f77388
1 changed files with 2 additions and 0 deletions
--- a/kernel/src/vx_start.S
+++ b/kernel/src/vx_start.S
@@ -102,6 +102,8 @@ init_regs:
 #endif
  csrr  t0, VX_CSR_MHARTID
  sll   t1, t0, STACK_LOG2_SIZE
+  sll   t2, t0, 2
+  add   t1, t1, t2
  sub   sp, sp, t1

  # set thread pointer register