From ebfcaa96fccc01301a577c5c56a5f00543cf167e Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Sat, 16 Apr 2005 15:25:18 -0700 Subject: [PATCH] [PATCH] x86_64: Rename the extended cpuid level field It was confusingly named. Signed-off-by: Andi Kleen DESC x86_64: Switch SMP bootup over to new CPU hotplug state machine EDESC From: "Andi Kleen" This will allow hotplug CPU in the future and in general cleans up a lot of crufty code. It also should plug some races that the old hackish way introduces. Remove one old race workaround in NMI watchdog setup that is not needed anymore. I removed the old total sum of bogomips reporting code. The brag value of BogoMips has been greatly devalued in the last years on the open market. Real CPU hotplug will need some more work, but the infrastructure for it is there now. One drawback: the new TSC sync algorithm is less accurate than before. The old way of zeroing TSCs is too intrusive to do later. Instead the TSC of the BP is duplicated now, which is less accurate. Cc: Cc: Signed-off-by: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86_64/kernel/setup.c | 13 ++++++------- include/asm-x86_64/processor.h | 2 +- 2 files changed, 7 insertions(+), 8 deletions(-) diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index c091fa1145..7ba443584a 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -673,7 +673,7 @@ static int __init get_model_name(struct cpuinfo_x86 *c) { unsigned int *v; - if (c->x86_cpuid_level < 0x80000004) + if (c->extended_cpuid_level < 0x80000004) return 0; v = (unsigned int *) c->x86_model_id; @@ -689,7 +689,7 @@ static void __init display_cacheinfo(struct cpuinfo_x86 *c) { unsigned int n, dummy, eax, ebx, ecx, edx; - n = c->x86_cpuid_level; + n = c->extended_cpuid_level; if (n >= 0x80000005) { cpuid(0x80000005, &dummy, &ebx, &ecx, &edx); @@ -781,7 +781,7 @@ static int __init init_amd(struct cpuinfo_x86 *c) } display_cacheinfo(c); - if (c->x86_cpuid_level >= 0x80000008) { + if (c->extended_cpuid_level >= 0x80000008) { c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1; if (c->x86_num_cores & (c->x86_num_cores - 1)) c->x86_num_cores = 1; @@ -841,7 +841,6 @@ static void __init detect_ht(struct cpuinfo_x86 *c) if (smp_num_siblings & (smp_num_siblings - 1)) index_msb++; - /* RED-PEN surely this must run in the non HT case too! -AK */ cpu_core_id[cpu] = phys_pkg_id(index_msb); if (c->x86_num_cores > 1) @@ -878,7 +877,7 @@ static void __init init_intel(struct cpuinfo_x86 *c) unsigned n; init_intel_cacheinfo(c); - n = c->x86_cpuid_level; + n = c->extended_cpuid_level; if (n >= 0x80000008) { unsigned eax = cpuid_eax(0x80000008); c->x86_virt_bits = (eax >> 8) & 0xff; @@ -927,7 +926,7 @@ void __init early_identify_cpu(struct cpuinfo_x86 *c) c->x86_cache_alignment = c->x86_clflush_size; c->x86_num_cores = 1; c->x86_apicid = c == &boot_cpu_data ? 0 : c - cpu_data; - c->x86_cpuid_level = 0; + c->extended_cpuid_level = 0; memset(&c->x86_capability, 0, sizeof c->x86_capability); /* Get vendor name */ @@ -974,7 +973,7 @@ void __init identify_cpu(struct cpuinfo_x86 *c) /* AMD-defined flags: level 0x80000001 */ xlvl = cpuid_eax(0x80000000); - c->x86_cpuid_level = xlvl; + c->extended_cpuid_level = xlvl; if ((xlvl & 0xffff0000) == 0x80000000) { if (xlvl >= 0x80000001) { c->x86_capability[1] = cpuid_edx(0x80000001); diff --git a/include/asm-x86_64/processor.h b/include/asm-x86_64/processor.h index 45ab74e8f1..f0581c3562 100644 --- a/include/asm-x86_64/processor.h +++ b/include/asm-x86_64/processor.h @@ -64,7 +64,7 @@ struct cpuinfo_x86 { __u8 x86_num_cores; __u8 x86_apicid; __u32 x86_power; - __u32 x86_cpuid_level; /* Max CPUID function supported */ + __u32 extended_cpuid_level; /* Max extended CPUID function supported */ unsigned long loops_per_jiffy; } ____cacheline_aligned; -- 2.39.5