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Rework the previous change to honor MADT processor IDs when probing 

processor objects.  Instead of forcing the new-bus CPU objects to use
a unit number equal to pc_cpuid, adjust acpi_pcpu_get_id() to honor the
MADT IDs by default.  As with the previous change, setting
debug.acpi.cpu_unordered to 1 in the loader will revert to the old
behavior.

Tested by:	jimharris
MFC after:	1 month
This commit is contained in:
John Baldwin 2012-05-23 13:45:52 +00:00
parent d79a477554
commit e4cd9dcff6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=235834
2 changed files with 59 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
sys/dev/acpica/acpi.c
View File

@ -289,13 +289,6 @@ SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
&acpi_reset_clock, 1, "Reset system clock while resuming.");
#endif
/* Allow users to ignore processor orders in MADT. */
static int acpi_cpu_unordered;
TUNABLE_INT("debug.acpi.cpu_unordered", &acpi_cpu_unordered);
SYSCTL_INT(_debug_acpi, OID_AUTO, cpu_unordered, CTLFLAG_RDTUN,
&acpi_cpu_unordered, 0,
"Do not use the MADT to match ACPI Processor objects to CPUs.");
/* Allow users to override quirks. */
TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
@ -1863,15 +1856,11 @@ static ACPI_STATUS
acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
{
struct acpi_prw_data prw;
ACPI_BUFFER buf;
ACPI_OBJECT obj;
ACPI_OBJECT_TYPE type;
ACPI_HANDLE h;
struct pcpu *pc;
device_t bus, child;
char *handle_str;
u_int cpuid;
int order, unit;
int order;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
@ -1909,31 +1898,6 @@ acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
case ACPI_TYPE_POWER:
unit = -1;
if (type == ACPI_TYPE_PROCESSOR && acpi_cpu_unordered == 0) {
ACPI_STATUS s;
buf.Pointer = &obj;
buf.Length = sizeof(obj);
s = AcpiEvaluateObject(handle, NULL, NULL, &buf);
if (ACPI_SUCCESS(s)) {
CPU_FOREACH(cpuid) {
pc = pcpu_find(cpuid);
if (pc->pc_acpi_id == obj.Processor.ProcId) {
unit = cpuid;
if (bootverbose)
printf("ACPI: %s (ACPI ID %u) -> cpu%d\n",
handle_str, obj.Processor.ProcId, unit);
break;
}
}
if (unit == -1) {
if (bootverbose)
printf("ACPI: %s (ACPI ID %u) ignored\n",
handle_str, obj.Processor.ProcId);
break;
}
}
}
/*
* Create a placeholder device for this node. Sort the
* placeholder so that the probe/attach passes will run
@ -1944,7 +1908,7 @@ acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
order = level * 10 + ACPI_DEV_BASE_ORDER;
acpi_probe_order(handle, &order);
child = BUS_ADD_CHILD(bus, order, NULL, unit);
child = BUS_ADD_CHILD(bus, order, NULL, -1);
if (child == NULL)
break;

79
sys/dev/acpica/acpi_cpu.c
View File

@ -124,6 +124,13 @@ struct acpi_cpu_device {
#define PIIX4_STOP_BREAK_MASK (PIIX4_BRLD_EN_IRQ0 | PIIX4_BRLD_EN_IRQ | PIIX4_BRLD_EN_IRQ8)
#define PIIX4_PCNTRL_BST_EN (1<<10)
/* Allow users to ignore processor orders in MADT. */
static int cpu_unordered;
TUNABLE_INT("debug.acpi.cpu_unordered", &cpu_unordered);
SYSCTL_INT(_debug_acpi, OID_AUTO, cpu_unordered, CTLFLAG_RDTUN,
&cpu_unordered, 0,
"Do not use the MADT to match ACPI Processor objects to CPUs.");
/* Platform hardware resource information. */
static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */
static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */
@ -148,7 +155,7 @@ static int acpi_cpu_probe(device_t dev);
static int acpi_cpu_attach(device_t dev);
static int acpi_cpu_suspend(device_t dev);
static int acpi_cpu_resume(device_t dev);
static int acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id,
static int acpi_pcpu_get_id(device_t dev, uint32_t *acpi_id,
uint32_t *cpu_id);
static struct resource_list *acpi_cpu_get_rlist(device_t dev, device_t child);
static device_t acpi_cpu_add_child(device_t dev, u_int order, const char *name,
@ -245,7 +252,7 @@ acpi_cpu_probe(device_t dev)
*/
acpi_id = obj->Processor.ProcId;
AcpiOsFree(obj);
if (acpi_pcpu_get_id(device_get_unit(dev), &acpi_id, &cpu_id) != 0)
if (acpi_pcpu_get_id(dev, &acpi_id, &cpu_id) != 0)
return (ENXIO);
/*
@ -436,36 +443,64 @@ acpi_cpu_resume(device_t dev)
}
/*
* Find the nth present CPU and return its pc_cpuid as well as set the
* pc_acpi_id from the most reliable source.
* Find the processor associated with a given ACPI ID. By default,
* use the MADT to map ACPI IDs to APIC IDs and use that to locate a
* processor. Some systems have inconsistent ASL and MADT however.
* For these systems the cpu_unordered tunable can be set in which
* case we assume that Processor objects are listed in the same order
* in both the MADT and ASL.
*/
static int
acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, uint32_t *cpu_id)
acpi_pcpu_get_id(device_t dev, uint32_t *acpi_id, uint32_t *cpu_id)
{
struct pcpu *pcpu_data;
uint32_t i;
struct pcpu *pc;
uint32_t i, idx;
KASSERT(acpi_id != NULL, ("Null acpi_id"));
KASSERT(cpu_id != NULL, ("Null cpu_id"));
idx = device_get_unit(dev);
/*
* If pc_acpi_id for CPU 0 is not initialized (e.g. a non-APIC
* UP box) use the ACPI ID from the first processor we find.
*/
if (idx == 0 && mp_ncpus == 1) {
pc = pcpu_find(0);
if (pc->pc_acpi_id == 0xffffffff)
pc->pc_acpi_id = *acpi_id;
*cpu_id = 0;
return (0);
}
CPU_FOREACH(i) {
pcpu_data = pcpu_find(i);
KASSERT(pcpu_data != NULL, ("no pcpu data for %d", i));
if (idx-- == 0) {
/*
* If pc_acpi_id was not initialized (e.g., a non-APIC UP box)
* override it with the value from the ASL. Otherwise, if the
* two don't match, prefer the MADT-derived value. Finally,
* return the pc_cpuid to reference this processor.
*/
if (pcpu_data->pc_acpi_id == 0xffffffff)
pcpu_data->pc_acpi_id = *acpi_id;
else if (pcpu_data->pc_acpi_id != *acpi_id)
*acpi_id = pcpu_data->pc_acpi_id;
*cpu_id = pcpu_data->pc_cpuid;
return (0);
pc = pcpu_find(i);
KASSERT(pc != NULL, ("no pcpu data for %d", i));
if (cpu_unordered) {
if (idx-- == 0) {
/*
* If pc_acpi_id doesn't match the ACPI ID from the
* ASL, prefer the MADT-derived value.
*/
if (pc->pc_acpi_id != *acpi_id)
*acpi_id = pc->pc_acpi_id;
*cpu_id = pc->pc_cpuid;
return (0);
}
} else {
if (pc->pc_acpi_id == *acpi_id) {
if (bootverbose)
device_printf(dev, "(ACPI ID %u) -> APIC ID %d\n",
*acpi_id, pc->pc_cpuid);
*cpu_id = pc->pc_cpuid;
return (0);
}
}
}
if (bootverbose)
printf("ACPI: Processor %s (ACPI ID %u) ignored\n",
acpi_name(acpi_get_handle(dev)), *acpi_id);
return (ESRCH);
}