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The following commit(s) were added to refs/heads/master by this push:
new 526ba1ab34 riscv/cpustart: Ensure we receive Soft IRQ / IPI before
booting CPU
526ba1ab34 is described below
commit 526ba1ab343a00b2e1801e089392eed64758b820
Author: Ville Juven <[email protected]>
AuthorDate: Fri Oct 11 13:22:23 2024 +0300
riscv/cpustart: Ensure we receive Soft IRQ / IPI before booting CPU
Some spurious interrupt might wake WFI, ensure we got woken by IPI before
continuing CPU boot.
---
arch/risc-v/src/common/riscv_cpustart.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/risc-v/src/common/riscv_cpustart.c
b/arch/risc-v/src/common/riscv_cpustart.c
index a3141aff9a..9cf04b7d63 100644
--- a/arch/risc-v/src/common/riscv_cpustart.c
+++ b/arch/risc-v/src/common/riscv_cpustart.c
@@ -77,7 +77,11 @@ void riscv_cpu_boot(int cpu)
/* Wait interrupt */
- asm("WFI");
+ do
+ {
+ asm("WFI");
+ }
+ while (READ_CSR(CSR_IP) != IP_SIP);
#ifdef CONFIG_RISCV_PERCPU_SCRATCH
/* Initialize the per CPU areas */
