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lib: sbi: Simplify halt broadcast logic

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Use the IPI .update callback to exclude the local hart. This allows
reusing the normal logic for broadcasting an IPI to all active harts.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Samuel Holland
2024-08-30 08:49:11 -07:00
committed by Anup Patel
parent 633e7cbd50
commit 97b8038916
2 changed files with 11 additions and 10 deletions
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10
lib/sbi/sbi_ipi.c
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@@ -208,6 +208,15 @@ void sbi_ipi_clear_smode(void)
csr_clear(CSR_MIP, MIP_SSIP);
}
static int sbi_ipi_update_halt(struct sbi_scratch *scratch,
struct sbi_scratch *remote_scratch,
u32 remote_hartindex, void *data)
{
/* Never send a halt IPI to the local hart. */
return scratch == remote_scratch ?
SBI_IPI_UPDATE_BREAK : SBI_IPI_UPDATE_SUCCESS;
}
static void sbi_ipi_process_halt(struct sbi_scratch *scratch)
{
sbi_hsm_hart_stop(scratch, true);
@@ -215,6 +224,7 @@ static void sbi_ipi_process_halt(struct sbi_scratch *scratch)
static struct sbi_ipi_event_ops ipi_halt_ops = {
.name = "IPI_HALT",
.update = sbi_ipi_update_halt,
.process = sbi_ipi_process_halt,
};