diff options
| -rw-r--r-- | hw/dts.c | 30 |
1 files changed, 29 insertions, 1 deletions
@@ -236,6 +236,34 @@ static int dts_read_core_temp_p9(uint32_t pir, struct dts *dts) return 0; } +static int dts_wakeup_core(struct cpu_thread *cpu) +{ + int retries = 10; + int rc; + + while (retries-- > 0) { + rc = dctl_set_special_wakeup(cpu); + if (rc) { + prerror("Failed to set special wakeup on %d (%d)\n", + cpu->pir, rc); + return rc; + } + + if (!dctl_core_is_gated(cpu)) + break; + + prlog(PR_NOTICE, "Retrying special wakeup on %d\n", cpu->pir); + rc = dctl_clear_special_wakeup(cpu); + if (rc) { + prerror("Failed to clear special wakeup on %d (%d)\n", + cpu->pir, rc); + return rc; + } + } + + return rc; +} + static void dts_async_read_temp(struct timer *t __unused, void *data, u64 now __unused) { @@ -243,7 +271,7 @@ static void dts_async_read_temp(struct timer *t __unused, void *data, int rc, swkup_rc; struct cpu_thread *cpu = data; - swkup_rc = dctl_set_special_wakeup(cpu); + swkup_rc = dts_wakeup_core(cpu); rc = dts_read_core_temp_p9(cpu->pir, &dts); if (!rc) { |