diff options
author | Mike Travis <travis@sgi.com> | 2008-12-17 01:33:54 (GMT) |
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committer | Mike Travis <travis@sgi.com> | 2008-12-17 01:40:56 (GMT) |
commit | 95d313cf1c1ecedc8bec5727b09bdacbf67dfc45 (patch) | |
tree | ee4aa8aff232bb30bb725c5670bb67d73484022d /arch/x86/include/asm/es7000 | |
parent | a1681965011916c2f1f0f1f87e70784f5d5d5be5 (diff) | |
download | linux-95d313cf1c1ecedc8bec5727b09bdacbf67dfc45.tar.xz |
x86: Add cpu_mask_to_apicid_and
Impact: new API
Add a helper function that takes two cpumask's, and's them and then
returns the apicid of the result. This removes a need in io_apic.c
that uses a temporary cpumask to hold (mask & cfg->domain).
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'arch/x86/include/asm/es7000')
-rw-r--r-- | arch/x86/include/asm/es7000/apic.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/x86/include/asm/es7000/apic.h b/arch/x86/include/asm/es7000/apic.h index 4cac083..c2bed77 100644 --- a/arch/x86/include/asm/es7000/apic.h +++ b/arch/x86/include/asm/es7000/apic.h @@ -214,6 +214,53 @@ static inline unsigned int cpu_mask_to_apicid(const cpumask_t *cpumask) return apicid; } +static inline unsigned int cpu_mask_to_apicid_and(const cpumask_t *cpumask, + const cpumask_t *andmask) +{ + int num_bits_set; + int num_bits_set2; + int cpus_found = 0; + int cpu; + int apicid = 0; + + num_bits_set = cpus_weight(*cpumask); + num_bits_set2 = cpus_weight(*andmask); + num_bits_set = min_t(int, num_bits_set, num_bits_set2); + /* Return id to all */ + if (num_bits_set >= nr_cpu_ids) +#if defined CONFIG_ES7000_CLUSTERED_APIC + return 0xFF; +#else + return cpu_to_logical_apicid(0); +#endif + /* + * The cpus in the mask must all be on the apic cluster. If are not + * on the same apicid cluster return default value of TARGET_CPUS. + */ + while ((cpu = next_cpu(-1, *cpumask)) < nr_cpu_ids) + if (cpu_isset(cpu, *andmask) + apicid = cpu_to_logical_apicid(cpu); + while (cpus_found < num_bits_set) { + if (cpu_isset(cpu, *cpumask) && cpu_isset(cpu, *andmask)) { + int new_apicid = cpu_to_logical_apicid(cpu); + if (apicid_cluster(apicid) != + apicid_cluster(new_apicid)) { + printk(KERN_WARNING + "%s: Not a valid mask!\n", __func__); +#if defined CONFIG_ES7000_CLUSTERED_APIC + return 0xFF; +#else + return cpu_to_logical_apicid(0); +#endif + } + apicid = new_apicid; + cpus_found++; + } + cpu++; + } + return apicid; +} + static inline u32 phys_pkg_id(u32 cpuid_apic, int index_msb) { return cpuid_apic >> index_msb; |