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lib: sbi: Optimize sbi_ipi

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The original sbi_ipi will be processed by hart by hart, after optimization,
send ipi first and finally wait together.

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 2023-04-11 12:56:19 +08:00 • committed by Anup Patel
parent 66fa925353
commit 24dde46b8d
1 changed files with 32 additions and 2 deletions
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34
lib/sbi/sbi_ipi.c
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@ -69,6 +69,18 @@ static int sbi_ipi_send(struct sbi_scratch *scratch, u32 remote_hartid,
sbi_pmu_ctr_incr_fw(SBI_PMU_FW_IPI_SENT);
return 0;
}
static int sbi_ipi_sync(struct sbi_scratch *scratch, u32 event)
{
const struct sbi_ipi_event_ops *ipi_ops;
if ((SBI_IPI_EVENT_MAX <= event) ||
!ipi_ops_array[event])
return SBI_EINVAL;
ipi_ops = ipi_ops_array[event];
if (ipi_ops->sync)
ipi_ops->sync(scratch);
@ -83,7 +95,7 @@ static int sbi_ipi_send(struct sbi_scratch *scratch, u32 remote_hartid,
int sbi_ipi_send_many(ulong hmask, ulong hbase, u32 event, void *data)
{
int rc;
ulong i, m;
ulong i, m, n;
struct sbi_domain *dom = sbi_domain_thishart_ptr();
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
@ -92,22 +104,40 @@ int sbi_ipi_send_many(ulong hmask, ulong hbase, u32 event, void *data)
if (rc)
return rc;
m &= hmask;
n = m;
/* Send IPIs */
for (i = hbase; m; i++, m >>= 1) {
if (m & 1UL)
sbi_ipi_send(scratch, i, event, data);
}
/* Sync IPIs */
m = n;
for (i = hbase; m; i++, m >>= 1) {
if (m & 1UL)
sbi_ipi_sync(scratch, event);
}
} else {
/* Send IPIs */
hbase = 0;
while (!sbi_hsm_hart_interruptible_mask(dom, hbase, &m)) {
/* Send IPIs */
for (i = hbase; m; i++, m >>= 1) {
if (m & 1UL)
sbi_ipi_send(scratch, i, event, data);
}
hbase += BITS_PER_LONG;
}
/* Sync IPIs */
hbase = 0;
while (!sbi_hsm_hart_interruptible_mask(dom, hbase, &m)) {
for (i = hbase; m; i++, m >>= 1) {
if (m & 1UL)
sbi_ipi_sync(scratch, event);
}
hbase += BITS_PER_LONG;
}
}
return 0;