From: Glauber de Oliveira Costa Date: Wed, 19 Mar 2008 17:25:05 +0000 (-0300) Subject: x86: merge smp_store_cpu_info X-Git-Tag: v2.6.26-rc1~1154^2~392 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1d89a7f072d4f76f0538edfb474d527066ee7838;p=linux-2.6 x86: merge smp_store_cpu_info now that it is the same between arches, put it into smpboot.c Signed-off-by: Glauber Costa Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index b13b9d55f9..a157a52459 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -45,6 +45,83 @@ unsigned char *trampoline_base = __va(SMP_TRAMPOLINE_BASE); /* representing cpus for which sibling maps can be computed */ static cpumask_t cpu_sibling_setup_map; +#ifdef CONFIG_X86_32 +/* Set if we find a B stepping CPU */ +int __cpuinitdata smp_b_stepping; +#endif + +static void __cpuinit smp_apply_quirks(struct cpuinfo_x86 *c) +{ +#ifdef CONFIG_X86_32 + /* + * Mask B, Pentium, but not Pentium MMX + */ + if (c->x86_vendor == X86_VENDOR_INTEL && + c->x86 == 5 && + c->x86_mask >= 1 && c->x86_mask <= 4 && + c->x86_model <= 3) + /* + * Remember we have B step Pentia with bugs + */ + smp_b_stepping = 1; + + /* + * Certain Athlons might work (for various values of 'work') in SMP + * but they are not certified as MP capable. + */ + if ((c->x86_vendor == X86_VENDOR_AMD) && (c->x86 == 6)) { + + if (num_possible_cpus() == 1) + goto valid_k7; + + /* Athlon 660/661 is valid. */ + if ((c->x86_model == 6) && ((c->x86_mask == 0) || + (c->x86_mask == 1))) + goto valid_k7; + + /* Duron 670 is valid */ + if ((c->x86_model == 7) && (c->x86_mask == 0)) + goto valid_k7; + + /* + * Athlon 662, Duron 671, and Athlon >model 7 have capability + * bit. It's worth noting that the A5 stepping (662) of some + * Athlon XP's have the MP bit set. + * See http://www.heise.de/newsticker/data/jow-18.10.01-000 for + * more. + */ + if (((c->x86_model == 6) && (c->x86_mask >= 2)) || + ((c->x86_model == 7) && (c->x86_mask >= 1)) || + (c->x86_model > 7)) + if (cpu_has_mp) + goto valid_k7; + + /* If we get here, not a certified SMP capable AMD system. */ + add_taint(TAINT_UNSAFE_SMP); + } + +valid_k7: + ; +#endif +} + +/* + * The bootstrap kernel entry code has set these up. Save them for + * a given CPU + */ + +void __cpuinit smp_store_cpu_info(int id) +{ + struct cpuinfo_x86 *c = &cpu_data(id); + + *c = boot_cpu_data; + c->cpu_index = id; + if (id != 0) + identify_secondary_cpu(c); + smp_apply_quirks(c); +} + + void __cpuinit set_cpu_sibling_map(int cpu) { int i; diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c index e05006416d..0bfb31e135 100644 --- a/arch/x86/kernel/smpboot_32.c +++ b/arch/x86/kernel/smpboot_32.c @@ -59,8 +59,7 @@ #include #include -/* Set if we find a B stepping CPU */ -static int __cpuinitdata smp_b_stepping; +extern int smp_b_stepping; static cpumask_t smp_commenced_mask; @@ -78,74 +77,6 @@ static void map_cpu_to_logical_apicid(void); /* State of each CPU. */ DEFINE_PER_CPU(int, cpu_state) = { 0 }; -static void __cpuinit smp_apply_quirks(struct cpuinfo_x86 *c) -{ - /* - * Mask B, Pentium, but not Pentium MMX - */ - if (c->x86_vendor == X86_VENDOR_INTEL && - c->x86 == 5 && - c->x86_mask >= 1 && c->x86_mask <= 4 && - c->x86_model <= 3) - /* - * Remember we have B step Pentia with bugs - */ - smp_b_stepping = 1; - - /* - * Certain Athlons might work (for various values of 'work') in SMP - * but they are not certified as MP capable. - */ - if ((c->x86_vendor == X86_VENDOR_AMD) && (c->x86 == 6)) { - - if (num_possible_cpus() == 1) - goto valid_k7; - - /* Athlon 660/661 is valid. */ - if ((c->x86_model==6) && ((c->x86_mask==0) || (c->x86_mask==1))) - goto valid_k7; - - /* Duron 670 is valid */ - if ((c->x86_model==7) && (c->x86_mask==0)) - goto valid_k7; - - /* - * Athlon 662, Duron 671, and Athlon >model 7 have capability bit. - * It's worth noting that the A5 stepping (662) of some Athlon XP's - * have the MP bit set. - * See http://www.heise.de/newsticker/data/jow-18.10.01-000 for more. - */ - if (((c->x86_model==6) && (c->x86_mask>=2)) || - ((c->x86_model==7) && (c->x86_mask>=1)) || - (c->x86_model> 7)) - if (cpu_has_mp) - goto valid_k7; - - /* If we get here, it's not a certified SMP capable AMD system. */ - add_taint(TAINT_UNSAFE_SMP); - } - -valid_k7: - ; - -} - -/* - * The bootstrap kernel entry code has set these up. Save them for - * a given CPU - */ - -void __cpuinit smp_store_cpu_info(int id) -{ - struct cpuinfo_x86 *c = &cpu_data(id); - - *c = boot_cpu_data; - c->cpu_index = id; - if (id != 0) - identify_secondary_cpu(c); - smp_apply_quirks(c); -} - static atomic_t init_deasserted; static void __cpuinit smp_callin(void) diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c index f84e30da52..c213345ca2 100644 --- a/arch/x86/kernel/smpboot_64.c +++ b/arch/x86/kernel/smpboot_64.c @@ -85,21 +85,6 @@ struct task_struct *idle_thread_array[NR_CPUS] __cpuinitdata ; #define set_idle_for_cpu(x,p) (idle_thread_array[(x)] = (p)) #endif -/* - * The bootstrap kernel entry code has set these up. Save them for - * a given CPU - */ - -static void __cpuinit smp_store_cpu_info(int id) -{ - struct cpuinfo_x86 *c = &cpu_data(id); - - *c = boot_cpu_data; - c->cpu_index = id; - if (id != 0) - identify_secondary_cpu(c); -} - static inline void wait_for_init_deassert(atomic_t *deassert) { while (!atomic_read(deassert)) diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h index 4dc271b437..b4c5143d7f 100644 --- a/include/asm-x86/smp.h +++ b/include/asm-x86/smp.h @@ -88,6 +88,8 @@ extern void prefill_possible_map(void); #define SMP_TRAMPOLINE_BASE 0x6000 extern unsigned long setup_trampoline(void); + +void smp_store_cpu_info(int id); #endif #ifdef CONFIG_X86_32 diff --git a/include/asm-x86/smp_32.h b/include/asm-x86/smp_32.h index 76740def60..51624abda4 100644 --- a/include/asm-x86/smp_32.h +++ b/include/asm-x86/smp_32.h @@ -42,8 +42,6 @@ DECLARE_PER_CPU(int, cpu_number); extern int safe_smp_processor_id(void); -void __cpuinit smp_store_cpu_info(int id); - /* We don't mark CPUs online until __cpu_up(), so we need another measure */ static inline int num_booting_cpus(void) {