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cpumask: centralize cpu_online_map and cpu_possible_map

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Impact: cleanup

Each SMP arch defines these themselves.  Move them to a central
location.

Twists:
1) Some archs (m32, parisc, s390) set possible_map to all 1, so we add a
   CONFIG_INIT_ALL_POSSIBLE for this rather than break them.

2) mips and sparc32 '#define cpu_possible_map phys_cpu_present_map'.
   Those archs simply have phys_cpu_present_map replaced everywhere.

3) Alpha defined cpu_possible_map to cpu_present_map; this is tricky
   so I just manipulate them both in sync.

4) IA64, cris and m32r have gratuitous 'extern cpumask_t cpu_possible_map'
   declarations.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Tested-by: Tony Luck <tony.luck@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Mike Travis <travis@sgi.com>
Cc: ink@jurassic.park.msu.ru
Cc: rmk@arm.linux.org.uk
Cc: starvik@axis.com
Cc: tony.luck@intel.com
Cc: takata@linux-m32r.org
Cc: ralf@linux-mips.org
Cc: grundler@parisc-linux.org
Cc: paulus@samba.org
Cc: schwidefsky@de.ibm.com
Cc: lethal@linux-sh.org
Cc: wli@holomorphy.com
Cc: davem@davemloft.net
Cc: jdike@addtoit.com
Cc: mingo@redhat.com
This commit is contained in:
Rusty Russell
2008-12-13 21:19:41 +10:30
parent 6c34bc2976
commit 98a79d6a50
35 changed files with 42 additions and 132 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/kernel/smp-cmp.c
View File

@ -226,7 +226,7 @@ void __init cmp_smp_setup(void)
for (i = 1; i < NR_CPUS; i++) {
if (amon_cpu_avail(i)) {
cpu_set(i, phys_cpu_present_map);
cpu_set(i, cpu_possible_map);
__cpu_number_map[i] = ++ncpu;
__cpu_logical_map[ncpu] = i;
}

2
arch/mips/kernel/smp-mt.c
View File

@ -70,7 +70,7 @@ static unsigned int __init smvp_vpe_init(unsigned int tc, unsigned int mvpconf0,
write_vpe_c0_vpeconf0(tmp);
/* Record this as available CPU */
cpu_set(tc, phys_cpu_present_map);
cpu_set(tc, cpu_possible_map);
__cpu_number_map[tc] = ++ncpu;
__cpu_logical_map[ncpu] = tc;
}

7
arch/mips/kernel/smp.c
View File

@ -44,15 +44,10 @@
#include <asm/mipsmtregs.h>
#endif /* CONFIG_MIPS_MT_SMTC */
cpumask_t phys_cpu_present_map; /* Bitmask of available CPUs */
volatile cpumask_t cpu_callin_map; /* Bitmask of started secondaries */
cpumask_t cpu_online_map; /* Bitmask of currently online CPUs */
int __cpu_number_map[NR_CPUS]; /* Map physical to logical */
int __cpu_logical_map[NR_CPUS]; /* Map logical to physical */
EXPORT_SYMBOL(phys_cpu_present_map);
EXPORT_SYMBOL(cpu_online_map);
extern void cpu_idle(void);
/* Number of TCs (or siblings in Intel speak) per CPU core */
@ -195,7 +190,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
/* preload SMP state for boot cpu */
void __devinit smp_prepare_boot_cpu(void)
{
cpu_set(0, phys_cpu_present_map);
cpu_set(0, cpu_possible_map);
cpu_set(0, cpu_online_map);
cpu_set(0, cpu_callin_map);
}

6
arch/mips/kernel/smtc.c
View File

@ -290,7 +290,7 @@ static void smtc_configure_tlb(void)
* possibly leave some TCs/VPEs as "slave" processors.
*
* Use c0_MVPConf0 to find out how many TCs are available, setting up
* phys_cpu_present_map and the logical/physical mappings.
* cpu_possible_map and the logical/physical mappings.
*/
int __init smtc_build_cpu_map(int start_cpu_slot)
@ -304,7 +304,7 @@ int __init smtc_build_cpu_map(int start_cpu_slot)
*/
ntcs = ((read_c0_mvpconf0() & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1;
for (i=start_cpu_slot; i<NR_CPUS && i<ntcs; i++) {
cpu_set(i, phys_cpu_present_map);
cpu_set(i, cpu_possible_map);
__cpu_number_map[i] = i;
__cpu_logical_map[i] = i;
}
@ -521,7 +521,7 @@ void smtc_prepare_cpus(int cpus)
* Pull any physically present but unused TCs out of circulation.
*/
while (tc < (((val & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1)) {
cpu_clear(tc, phys_cpu_present_map);
cpu_clear(tc, cpu_possible_map);
cpu_clear(tc, cpu_present_map);
tc++;
}