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x86: change size of APICIDs from u8 to u16

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Change the size of APICIDs from u8 to u16.  This partially
supports the new x2apic mode that will be present on future
processor chips. (Chips actually support 32-bit APICIDs, but that
change is more intrusive. Supporting 16-bit is sufficient for now).

Signed-off-by: Jack Steiner <steiner@sgi.com>

I've included just the partial change from u8 to u16 apicids.  The
remaining x2apic changes will be in a separate patch.

In addition, the fake_node_to_pxm_map[] and fake_apicid_to_node[]
tables have been moved from local data to the __initdata section
reducing stack pressure when MAX_NUMNODES and MAX_LOCAL_APIC are
increased in size.

Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
travis@sgi.com 2008-01-30 13:33:10 +01:00 committed by Ingo Molnar
parent a1bf250a6f
commit ef97001f3d
7 changed files with 30 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kernel/genapic_64.c
View File

@ -32,10 +32,10 @@
* array during this time. Is it zeroed when the per_cpu
* data area is removed.
*/
u8 x86_cpu_to_apicid_init[NR_CPUS] __initdata
u16 x86_cpu_to_apicid_init[NR_CPUS] __initdata
= { [0 ... NR_CPUS-1] = BAD_APICID };
void *x86_cpu_to_apicid_ptr;
DEFINE_PER_CPU(u8, x86_cpu_to_apicid) = BAD_APICID;
DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID;
EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
struct genapic __read_mostly *genapic = &apic_flat;

4
arch/x86/kernel/mpparse_64.c
View File

@ -67,7 +67,7 @@ unsigned disabled_cpus __cpuinitdata;
/* Bitmask of physically existing CPUs */
physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
u8 bios_cpu_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
u16 bios_cpu_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
/*
@ -132,7 +132,7 @@ static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
* area is created.
*/
if (x86_cpu_to_apicid_ptr) {
u8 *x86_cpu_to_apicid = (u8 *)x86_cpu_to_apicid_ptr;
u16 *x86_cpu_to_apicid = (u16 *)x86_cpu_to_apicid_ptr;
x86_cpu_to_apicid[cpu] = m->mpc_apicid;
} else {
per_cpu(x86_cpu_to_apicid, cpu) = m->mpc_apicid;

2
arch/x86/kernel/smpboot_64.c
View File

@ -65,7 +65,7 @@ int smp_num_siblings = 1;
EXPORT_SYMBOL(smp_num_siblings);
/* Last level cache ID of each logical CPU */
DEFINE_PER_CPU(u8, cpu_llc_id) = BAD_APICID;
DEFINE_PER_CPU(u16, cpu_llc_id) = BAD_APICID;
/* Bitmask of currently online CPUs */
cpumask_t cpu_online_map __read_mostly;

2
arch/x86/mm/numa_64.c
View File

@ -626,7 +626,7 @@ void __init init_cpu_to_node(void)
int i;
for (i = 0; i < NR_CPUS; i++) {
u8 apicid = x86_cpu_to_apicid_init[i];
u16 apicid = x86_cpu_to_apicid_init[i];
if (apicid == BAD_APICID)
continue;

22
arch/x86/mm/srat_64.c
View File

@ -130,6 +130,9 @@ void __init
acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
{
int pxm, node;
int apic_id;
apic_id = pa->apic_id;
if (srat_disabled())
return;
if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
@ -145,10 +148,10 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
bad_srat();
return;
}
apicid_to_node[pa->apic_id] = node;
apicid_to_node[apic_id] = node;
acpi_numa = 1;
printk(KERN_INFO "SRAT: PXM %u -> APIC %u -> Node %u\n",
pxm, pa->apic_id, node);
pxm, apic_id, node);
}
int update_end_of_memory(unsigned long end) {return -1;}
@ -343,7 +346,8 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
/* First clean up the node list */
for (i = 0; i < MAX_NUMNODES; i++) {
cutoff_node(i, start, end);
if ((nodes[i].end - nodes[i].start) < NODE_MIN_SIZE) {
/* ZZZ why was this needed. At least add a comment */
if (nodes[i].end && (nodes[i].end - nodes[i].start) < NODE_MIN_SIZE) {
unparse_node(i);
node_set_offline(i);
}
@ -384,6 +388,12 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
}
#ifdef CONFIG_NUMA_EMU
static int fake_node_to_pxm_map[MAX_NUMNODES] __initdata = {
[0 ... MAX_NUMNODES-1] = PXM_INVAL
};
static unsigned char fake_apicid_to_node[MAX_LOCAL_APIC] __initdata = {
[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
};
static int __init find_node_by_addr(unsigned long addr)
{
int ret = NUMA_NO_NODE;
@ -414,12 +424,6 @@ static int __init find_node_by_addr(unsigned long addr)
void __init acpi_fake_nodes(const struct bootnode *fake_nodes, int num_nodes)
{
int i, j;
int fake_node_to_pxm_map[MAX_NUMNODES] = {
[0 ... MAX_NUMNODES-1] = PXM_INVAL
};
unsigned char fake_apicid_to_node[MAX_LOCAL_APIC] = {
[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
};
printk(KERN_INFO "Faking PXM affinity for fake nodes on real "
"topology.\n");

14
include/asm-x86/processor.h
View File

@ -90,14 +90,14 @@ struct cpuinfo_x86 {
#ifdef CONFIG_SMP
cpumask_t llc_shared_map; /* cpus sharing the last level cache */
#endif
unsigned char x86_max_cores; /* cpuid returned max cores value */
unsigned char apicid;
unsigned short x86_clflush_size;
u16 x86_max_cores; /* cpuid returned max cores value */
u16 apicid;
u16 x86_clflush_size;
#ifdef CONFIG_SMP
unsigned char booted_cores; /* number of cores as seen by OS */
__u8 phys_proc_id; /* Physical processor id. */
__u8 cpu_core_id; /* Core id */
__u8 cpu_index; /* index into per_cpu list */
u16 booted_cores; /* number of cores as seen by OS */
u16 phys_proc_id; /* Physical processor id. */
u16 cpu_core_id; /* Core id */
u16 cpu_index; /* index into per_cpu list */
#endif
} __attribute__((__aligned__(SMP_CACHE_BYTES)));

8
include/asm-x86/smp_64.h
View File

@ -26,14 +26,14 @@ extern void unlock_ipi_call_lock(void);
extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
void *info, int wait);
extern u8 __initdata x86_cpu_to_apicid_init[];
extern u16 __initdata x86_cpu_to_apicid_init[];
extern void *x86_cpu_to_apicid_ptr;
extern u8 bios_cpu_apicid[];
extern u16 bios_cpu_apicid[];
DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
DECLARE_PER_CPU(cpumask_t, cpu_core_map);
DECLARE_PER_CPU(u8, cpu_llc_id);
DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
DECLARE_PER_CPU(u16, cpu_llc_id);
DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
static inline int cpu_present_to_apicid(int mps_cpu)
{