提交 e0da3364 编写于 作者: Y Yinghai Lu 提交者: Ingo Molnar

x86: introduce max_physical_apicid for bigsmp switching

a multi-socket test-system with 3 or 4 ioapics, when 4 dualcore cpus or
2 quadcore cpus installed, needs to switch to bigsmp or physflat.

CPU apic id is [4,11] instead of [0,7], and we need to check max apic
id instead of cpu numbers.

also add check for 32 bit when acpi is not compiled in or acpi=off.
Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 c3ff0167
......@@ -1518,6 +1518,9 @@ void __cpuinit generic_processor_info(int apicid, int version)
*/
cpu = 0;
if (apicid > max_physical_apicid)
max_physical_apicid = apicid;
/*
* Would be preferable to switch to bigsmp when CONFIG_HOTPLUG_CPU=y
* but we need to work other dependencies like SMP_SUSPEND etc
......@@ -1525,7 +1528,7 @@ void __cpuinit generic_processor_info(int apicid, int version)
* if (CPU_HOTPLUG_ENABLED || num_processors > 8)
* - Ashok Raj <ashok.raj@intel.com>
*/
if (num_processors > 8) {
if (max_physical_apicid >= 8) {
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_INTEL:
if (!APIC_XAPIC(version)) {
......
......@@ -1093,6 +1093,9 @@ void __cpuinit generic_processor_info(int apicid, int version)
*/
cpu = 0;
}
if (apicid > max_physical_apicid)
max_physical_apicid = apicid;
/* are we being called early in kernel startup? */
if (x86_cpu_to_apicid_early_ptr) {
u16 *cpu_to_apicid = x86_cpu_to_apicid_early_ptr;
......
......@@ -51,7 +51,7 @@ void __init setup_apic_routing(void)
else
#endif
if (num_possible_cpus() <= 8)
if (max_physical_apicid < 8)
genapic = &apic_flat;
else
genapic = &apic_physflat;
......
......@@ -473,6 +473,11 @@ static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early)
++mpc_record;
#endif
}
#ifdef CONFIG_X86_GENERICARCH
generic_bigsmp_probe();
#endif
setup_apic_routing();
if (!num_processors)
printk(KERN_ERR "MPTABLE: no processors registered!\n");
......
......@@ -17,6 +17,7 @@ unsigned int num_processors;
unsigned disabled_cpus __cpuinitdata;
/* Processor that is doing the boot up */
unsigned int boot_cpu_physical_apicid = -1U;
unsigned int max_physical_apicid;
EXPORT_SYMBOL(boot_cpu_physical_apicid);
DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID;
......
......@@ -838,18 +838,17 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_ACPI
acpi_boot_init();
#endif
#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
if (smp_found_config)
get_smp_config();
#endif
#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
if (def_to_bigsmp)
printk(KERN_WARNING "More than 8 CPUs detected and "
"CONFIG_X86_PC cannot handle it.\nUse "
"CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
#endif
#endif
#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
if (smp_found_config)
get_smp_config();
#endif
e820_setup_gap();
e820_mark_nosave_regions(max_low_pfn);
......
......@@ -48,7 +48,7 @@ static const struct dmi_system_id bigsmp_dmi_table[] = {
static int probe_bigsmp(void)
{
if (def_to_bigsmp)
dmi_bigsmp = 1;
dmi_bigsmp = 1;
else
dmi_check_system(bigsmp_dmi_table);
return dmi_bigsmp;
......
......@@ -33,6 +33,7 @@ extern int mp_bus_id_to_type[MAX_MP_BUSSES];
extern DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
extern unsigned int boot_cpu_physical_apicid;
extern unsigned int max_physical_apicid;
extern int smp_found_config;
extern int mpc_default_type;
extern unsigned long mp_lapic_addr;
......
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