Now that sequence numbers are set up when devices are bound, this code is not needed. Also, we should use dev_seq() instead of req_seq. Update the whole file accordingly.
Also fix up APL cpu while we are here.
Signed-off-by: Simon Glass sjg@chromium.org ---
(no changes since v1)
arch/x86/cpu/apollolake/cpu.c | 2 +- arch/x86/cpu/mp_init.c | 23 +++++++---------------- arch/x86/include/asm/mp.h | 2 +- 3 files changed, 9 insertions(+), 18 deletions(-)
diff --git a/arch/x86/cpu/apollolake/cpu.c b/arch/x86/cpu/apollolake/cpu.c index d37f91d1ce1..328f79255f8 100644 --- a/arch/x86/cpu/apollolake/cpu.c +++ b/arch/x86/cpu/apollolake/cpu.c @@ -63,7 +63,7 @@ static int apl_get_info(const struct udevice *dev, struct cpu_info *info)
static int acpi_cpu_fill_ssdt(const struct udevice *dev, struct acpi_ctx *ctx) { - uint core_id = dev->req_seq; + uint core_id = dev_seq(dev); int cores_per_package; int ret;
diff --git a/arch/x86/cpu/mp_init.c b/arch/x86/cpu/mp_init.c index d2f1ee38cf0..5bb7abdf873 100644 --- a/arch/x86/cpu/mp_init.c +++ b/arch/x86/cpu/mp_init.c @@ -87,7 +87,7 @@ DECLARE_GLOBAL_DATA_PTR; * intel,apic-id = <2>; * }; * - * Here the 'reg' property is the CPU number and then is placed in dev->req_seq + * Here the 'reg' property is the CPU number and then is placed in dev_seq(cpu) * so that we can index into ap_callbacks[] using that. The APIC ID is different * and may not be sequential (it typically is if hyperthreading is supported). * @@ -135,7 +135,7 @@ struct mp_flight_plan { * * @func: Function to run * @arg: Argument to pass to the function - * @logical_cpu_number: Either a CPU number (i.e. dev->req_seq) or a special + * @logical_cpu_number: Either a CPU number (i.e. dev_seq(cpu) or a special * value like MP_SELECT_BSP. It tells the AP whether it should process this * callback */ @@ -152,7 +152,7 @@ static struct mp_flight_plan mp_info; * ap_callbacks - Callback mailbox array * * Array of callback, one entry for each available CPU, indexed by the CPU - * number, which is dev->req_seq. The entry for the main CPU is never used. + * number, which is dev_seq(cpu). The entry for the main CPU is never used. * When this is NULL, there is no pending work for the CPU to run. When * non-NULL it points to the mp_callback structure. This is shared between all * CPUs, so should only be written by the main CPU. @@ -562,7 +562,7 @@ static int get_bsp(struct udevice **devp, int *cpu_countp) if (cpu_countp) *cpu_countp = ret;
- return dev->req_seq >= 0 ? dev->req_seq : 0; + return dev_seq(dev) >= 0 ? dev_seq(dev) : 0; }
/** @@ -614,7 +614,7 @@ static void store_callback(struct mp_callback **slot, struct mp_callback *val) static int run_ap_work(struct mp_callback *callback, struct udevice *bsp, int num_cpus, uint expire_ms) { - int cur_cpu = bsp->req_seq; + int cur_cpu = dev_seq(bsp); int num_aps = num_cpus - 1; /* number of non-BSPs to get this message */ int cpus_accepted; ulong start; @@ -679,7 +679,7 @@ static int ap_wait_for_instruction(struct udevice *cpu, void *unused) if (!IS_ENABLED(CONFIG_SMP_AP_WORK)) return 0;
- per_cpu_slot = &ap_callbacks[cpu->req_seq]; + per_cpu_slot = &ap_callbacks[dev_seq(cpu)];
while (1) { struct mp_callback *cb = read_callback(per_cpu_slot); @@ -694,7 +694,7 @@ static int ap_wait_for_instruction(struct udevice *cpu, void *unused) mfence(); if (lcb.logical_cpu_number == MP_SELECT_ALL || lcb.logical_cpu_number == MP_SELECT_APS || - cpu->req_seq == lcb.logical_cpu_number) + dev_seq(cpu) == lcb.logical_cpu_number) lcb.func(lcb.arg);
/* Indicate we are finished */ @@ -839,7 +839,6 @@ int mp_init(void) int num_aps, num_cpus; atomic_t *ap_count; struct udevice *cpu; - struct uclass *uc; int ret;
if (IS_ENABLED(CONFIG_QFW)) { @@ -848,14 +847,6 @@ int mp_init(void) return ret; }
- /* - * Multiple APs are brought up simultaneously and they may get the same - * seq num in the uclass_resolve_seq() during device_probe(). To avoid - * this, set req_seq to the reg number in the device tree in advance. - */ - uclass_id_foreach_dev(UCLASS_CPU, cpu, uc) - cpu->req_seq = dev_read_u32_default(cpu, "reg", -1); - ret = get_bsp(&cpu, &num_cpus); if (ret < 0) { debug("Cannot init boot CPU: err=%d\n", ret); diff --git a/arch/x86/include/asm/mp.h b/arch/x86/include/asm/mp.h index 5f9b8c65643..1e4e35321de 100644 --- a/arch/x86/include/asm/mp.h +++ b/arch/x86/include/asm/mp.h @@ -114,7 +114,7 @@ typedef void (*mp_run_func)(void *arg); * Running on anything other than the boot CPU is only supported if * CONFIG_SMP_AP_WORK is enabled * - * @cpu_select: CPU to run on (its dev->req_seq value), or MP_SELECT_ALL for + * @cpu_select: CPU to run on (its dev_seq() value), or MP_SELECT_ALL for * all, or MP_SELECT_BSP for BSP * @func: Function to run * @arg: Argument to pass to the function