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vx_start.S: Swizzle stack space

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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.
This commit is contained in:
Hansung Kim
2024-03-29 12:24:55 -07:00
parent fa2b6e2ad0
commit b0c1f77388
1 changed files with 2 additions and 0 deletions
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kernel/src/vx_start.S
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@@ -102,6 +102,8 @@ init_regs:
#endif #endif
csrr t0, VX_CSR_MHARTID csrr t0, VX_CSR_MHARTID
sll t1, t0, STACK_LOG2_SIZE sll t1, t0, STACK_LOG2_SIZE
sll t2, t0, 2
add t1, t1, t2
sub sp, sp, t1 sub sp, sp, t1
# set thread pointer register # set thread pointer register