diff options
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
-rw-r--r-- | arch/x86/kernel/cpu/amd.c | 117 |
1 files changed, 98 insertions, 19 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 63fddcd0..22a47c8 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -2,7 +2,7 @@ #include <linux/bitops.h> #include <linux/mm.h> -#include <asm/io.h> +#include <linux/io.h> #include <asm/processor.h> #include <asm/apic.h> #include <asm/cpu.h> @@ -45,8 +45,8 @@ static void __cpuinit init_amd_k5(struct cpuinfo_x86 *c) #define CBAR_ENB (0x80000000) #define CBAR_KEY (0X000000CB) if (c->x86_model == 9 || c->x86_model == 10) { - if (inl (CBAR) & CBAR_ENB) - outl (0 | CBAR_KEY, CBAR); + if (inl(CBAR) & CBAR_ENB) + outl(0 | CBAR_KEY, CBAR); } } @@ -87,9 +87,10 @@ static void __cpuinit init_amd_k6(struct cpuinfo_x86 *c) d = d2-d; if (d > 20*K6_BUG_LOOP) - printk("system stability may be impaired when more than 32 MB are used.\n"); + printk(KERN_CONT + "system stability may be impaired when more than 32 MB are used.\n"); else - printk("probably OK (after B9730xxxx).\n"); + printk(KERN_CONT "probably OK (after B9730xxxx).\n"); printk(KERN_INFO "Please see http://membres.lycos.fr/poulot/k6bug.html\n"); } @@ -219,8 +220,9 @@ static void __cpuinit init_amd_k7(struct cpuinfo_x86 *c) if ((c->x86_model == 8 && c->x86_mask >= 1) || (c->x86_model > 8)) { rdmsr(MSR_K7_CLK_CTL, l, h); if ((l & 0xfff00000) != 0x20000000) { - printk ("CPU: CLK_CTL MSR was %x. Reprogramming to %x\n", l, - ((l & 0x000fffff)|0x20000000)); + printk(KERN_INFO + "CPU: CLK_CTL MSR was %x. Reprogramming to %x\n", + l, ((l & 0x000fffff)|0x20000000)); wrmsr(MSR_K7_CLK_CTL, (l & 0x000fffff)|0x20000000, h); } } @@ -251,6 +253,64 @@ static int __cpuinit nearby_node(int apicid) #endif /* + * Fixup core topology information for AMD multi-node processors. + * Assumption 1: Number of cores in each internal node is the same. + * Assumption 2: Mixed systems with both single-node and dual-node + * processors are not supported. + */ +#ifdef CONFIG_X86_HT +static void __cpuinit amd_fixup_dcm(struct cpuinfo_x86 *c) +{ +#ifdef CONFIG_PCI + u32 t, cpn; + u8 n, n_id; + int cpu = smp_processor_id(); + + /* fixup topology information only once for a core */ + if (cpu_has(c, X86_FEATURE_AMD_DCM)) + return; + + /* check for multi-node processor on boot cpu */ + t = read_pci_config(0, 24, 3, 0xe8); + if (!(t & (1 << 29))) + return; + + set_cpu_cap(c, X86_FEATURE_AMD_DCM); + + /* cores per node: each internal node has half the number of cores */ + cpn = c->x86_max_cores >> 1; + + /* even-numbered NB_id of this dual-node processor */ + n = c->phys_proc_id << 1; + + /* + * determine internal node id and assign cores fifty-fifty to + * each node of the dual-node processor + */ + t = read_pci_config(0, 24 + n, 3, 0xe8); + n = (t>>30) & 0x3; + if (n == 0) { + if (c->cpu_core_id < cpn) + n_id = 0; + else + n_id = 1; + } else { + if (c->cpu_core_id < cpn) + n_id = 1; + else + n_id = 0; + } + + /* compute entire NodeID, use llc_shared_map to store sibling info */ + per_cpu(cpu_llc_id, cpu) = (c->phys_proc_id << 1) + n_id; + + /* fixup core id to be in range from 0 to cpn */ + c->cpu_core_id = c->cpu_core_id % cpn; +#endif +} +#endif + +/* * On a AMD dual core setup the lower bits of the APIC id distingush the cores. * Assumes number of cores is a power of two. */ @@ -267,6 +327,9 @@ static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c) c->phys_proc_id = c->initial_apicid >> bits; /* use socket ID also for last level cache */ per_cpu(cpu_llc_id, cpu) = c->phys_proc_id; + /* fixup topology information on multi-node processors */ + if ((c->x86 == 0x10) && (c->x86_model == 9)) + amd_fixup_dcm(c); #endif } @@ -275,9 +338,10 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c) #if defined(CONFIG_NUMA) && defined(CONFIG_X86_64) int cpu = smp_processor_id(); int node; - unsigned apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid; + unsigned apicid = c->apicid; + + node = per_cpu(cpu_llc_id, cpu); - node = c->phys_proc_id; if (apicid_to_node[apicid] != NUMA_NO_NODE) node = apicid_to_node[apicid]; if (!node_online(node)) { @@ -398,18 +462,30 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) u32 level; level = cpuid_eax(1); - if((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58) + if ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58) set_cpu_cap(c, X86_FEATURE_REP_GOOD); /* * Some BIOSes incorrectly force this feature, but only K8 * revision D (model = 0x14) and later actually support it. + * (AMD Erratum #110, docId: 25759). */ - if (c->x86_model < 0x14) + if (c->x86_model < 0x14 && cpu_has(c, X86_FEATURE_LAHF_LM)) { + u64 val; + clear_cpu_cap(c, X86_FEATURE_LAHF_LM); + if (!rdmsrl_amd_safe(0xc001100d, &val)) { + val &= ~(1ULL << 32); + wrmsrl_amd_safe(0xc001100d, val); + } + } + } if (c->x86 == 0x10 || c->x86 == 0x11) set_cpu_cap(c, X86_FEATURE_REP_GOOD); + + /* get apicid instead of initial apic id from cpuid */ + c->apicid = hard_smp_processor_id(); #else /* @@ -494,27 +570,30 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) * benefit in doing so. */ if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg)) { - printk(KERN_DEBUG "tseg: %010llx\n", tseg); - if ((tseg>>PMD_SHIFT) < + printk(KERN_DEBUG "tseg: %010llx\n", tseg); + if ((tseg>>PMD_SHIFT) < (max_low_pfn_mapped>>(PMD_SHIFT-PAGE_SHIFT)) || - ((tseg>>PMD_SHIFT) < + ((tseg>>PMD_SHIFT) < (max_pfn_mapped>>(PMD_SHIFT-PAGE_SHIFT)) && - (tseg>>PMD_SHIFT) >= (1ULL<<(32 - PMD_SHIFT)))) - set_memory_4k((unsigned long)__va(tseg), 1); + (tseg>>PMD_SHIFT) >= (1ULL<<(32 - PMD_SHIFT)))) + set_memory_4k((unsigned long)__va(tseg), 1); } } #endif } #ifdef CONFIG_X86_32 -static unsigned int __cpuinit amd_size_cache(struct cpuinfo_x86 *c, unsigned int size) +static unsigned int __cpuinit amd_size_cache(struct cpuinfo_x86 *c, + unsigned int size) { /* AMD errata T13 (order #21922) */ if ((c->x86 == 6)) { - if (c->x86_model == 3 && c->x86_mask == 0) /* Duron Rev A0 */ + /* Duron Rev A0 */ + if (c->x86_model == 3 && c->x86_mask == 0) size = 64; + /* Tbird rev A1/A2 */ if (c->x86_model == 4 && - (c->x86_mask == 0 || c->x86_mask == 1)) /* Tbird rev A1/A2 */ + (c->x86_mask == 0 || c->x86_mask == 1)) size = 256; } return size; |