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lib: sbi: Optimize sbi_tlb queue waiting

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When tlb_fifo is full, it will wait and affect the ipi update to
other harts. This patch is optimized.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Xiang W
2023-04-14 09:32:47 +08:00
committed by Anup Patel
parent 80078ab088
commit bf40e07f6f
3 changed files with 36 additions and 27 deletions
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7
lib/sbi/sbi_tlb.c
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@@ -357,14 +357,14 @@ static int tlb_update(struct sbi_scratch *scratch,
*/
if (remote_hartid == curr_hartid) {
tinfo->local_fn(tinfo);
return -1;
return SBI_IPI_UPDATE_BREAK;
}
tlb_fifo_r = sbi_scratch_offset_ptr(remote_scratch, tlb_fifo_off);
ret = sbi_fifo_inplace_update(tlb_fifo_r, data, tlb_update_cb);
while (ret == SBI_FIFO_UNCHANGED && sbi_fifo_enqueue(tlb_fifo_r, data) < 0) {
if (ret == SBI_FIFO_UNCHANGED && sbi_fifo_enqueue(tlb_fifo_r, data) < 0) {
/**
* For now, Busy loop until there is space in the fifo.
* There may be case where target hart is also
@@ -376,12 +376,13 @@ static int tlb_update(struct sbi_scratch *scratch,
tlb_process_once(scratch);
sbi_dprintf("hart%d: hart%d tlb fifo full\n",
curr_hartid, remote_hartid);
return SBI_IPI_UPDATE_RETRY;
}
tlb_sync = sbi_scratch_offset_ptr(scratch, tlb_sync_off);
atomic_add_return(tlb_sync, 1);
return 0;
return SBI_IPI_UPDATE_SUCCESS;
}
static struct sbi_ipi_event_ops tlb_ops = {