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authorNick Hu <nick.hu@sifive.com>2024-07-17 11:17:14 +0800
committerPalmer Dabbelt <palmer@rivosinc.com>2024-08-01 07:15:43 -0700
commit3908ba2e0b2476e2ec13e15967bf6a37e449f2af (patch)
treeb5f3c71ec344334b85f3b842eecdcc8632db907c /include
parent0c710050c47d45eb77b28c271cddefc5c785cb40 (diff)
RISC-V: Enable the IPI before workqueue_online_cpu()
Sometimes the hotplug cpu stalls at the arch_cpu_idle() for a while after workqueue_online_cpu(). When cpu stalls at the idle loop, the reschedule IPI is pending. However the enable bit is not enabled yet so the cpu stalls at WFI until watchdog timeout. Therefore enable the IPI before the workqueue_online_cpu() to fix the issue. Fixes: 63c5484e7495 ("workqueue: Add multiple affinity scopes and interface to select them") Signed-off-by: Nick Hu <nick.hu@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20240717031714.1946036-1-nick.hu@sifive.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/cpuhotplug.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 51ba681b915a..e30d93b807d5 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -148,6 +148,7 @@ enum cpuhp_state {
CPUHP_AP_IRQ_LOONGARCH_STARTING,
CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING,
CPUHP_AP_IRQ_RISCV_IMSIC_STARTING,
+ CPUHP_AP_IRQ_RISCV_SBI_IPI_STARTING,
CPUHP_AP_ARM_MVEBU_COHERENCY,
CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
CPUHP_AP_PERF_X86_STARTING,