lwn.git/arch/x86/kernel/cpu/cpu_debug.c, branch v3.4.38

x86: Remove "x86 CPU features in debugfs" (CONFIG_X86_CPU_DEBUG)

2010-01-24T02:27:47+00:00

CONFIG_X86_CPU_DEBUG, which provides some parsed versions of the x86 CPU configuration via debugfs, has caused boot failures on real hardware. The value of this feature has been marginal at best, as all this information is already available to userspace via generic interfaces. Causes crashes that have not been fixed + minimal utility -> remove. See the referenced LKML thread for more information. Reported-by: Ozan Çağlayan Signed-off-by: H. Peter Anvin LKML-Reference: Cc: Jaswinder Singh Rajput Cc: Linus Torvalds Cc: Rafael J. Wysocki Cc: Yinghai Lu Cc:

percpu: make percpu symbols in x86 unique

2009-10-29T13:34:14+00:00

This patch updates percpu related symbols in x86 such that percpu symbols are unique and don't clash with local symbols. This serves two purposes of decreasing the possibility of global percpu symbol collision and allowing dropping per_cpu__ prefix from percpu symbols. * arch/x86/kernel/cpu/common.c: rename local variable to avoid collision * arch/x86/kvm/svm.c: s/svm_data/sd/ for local variables to avoid collision * arch/x86/kernel/cpu/cpu_debug.c: s/cpu_arr/cpud_arr/ s/priv_arr/cpud_priv_arr/ s/cpu_priv_count/cpud_priv_count/ * arch/x86/kernel/cpu/intel_cacheinfo.c: s/cpuid4_info/ici_cpuid4_info/ s/cache_kobject/ici_cache_kobject/ s/index_kobject/ici_index_kobject/ * arch/x86/kernel/ds.c: s/cpu_context/cpu_ds_context/ Partly based on Rusty Russell's "alloc_percpu: rename percpu vars which cause name clashes" patch. Signed-off-by: Tejun Heo Acked-by: (kvm) Avi Kivity Cc: Rusty Russell Cc: Thomas Gleixner Cc: Ingo Molnar Cc: H. Peter Anvin Cc: Marcelo Tosatti Cc: x86@kernel.org

percpu: cleanup percpu array definitions

2009-06-24T06:13:45+00:00

Currently, the following three different ways to define percpu arrays are in use. 1. DEFINE_PER_CPU(elem_type[array_len], array_name); 2. DEFINE_PER_CPU(elem_type, array_name[array_len]); 3. DEFINE_PER_CPU(elem_type, array_name)[array_len]; Unify to #1 which correctly separates the roles of the two parameters and thus allows more flexibility in the way percpu variables are defined. [ Impact: cleanup ] Signed-off-by: Tejun Heo Reviewed-by: Christoph Lameter Cc: Ingo Molnar Cc: Tony Luck Cc: Benjamin Herrenschmidt Cc: Thomas Gleixner Cc: Jeremy Fitzhardinge Cc: linux-mm@kvack.org Cc: Christoph Lameter Cc: David S. Miller

Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-10T22:51:15+00:00

* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: cpu_debug: Remove model information to reduce encoding-decoding x86: fixup numa_node information for AMD CPU northbridge functions x86: k8 convert node_to_k8_nb_misc() from a macro to an inline function x86: cacheinfo: complete L2/L3 Cache and TLB associativity field definitions x86/docs: add description for cache_disable sysfs interface x86: cacheinfo: disable L3 ECC scrubbing when L3 cache index is disabled x86: cacheinfo: replace sysfs interface for cache_disable feature x86: cacheinfo: use cached K8 NB_MISC devices instead of scanning for it x86: cacheinfo: correct return value when cache_disable feature is not active x86: cacheinfo: use L3 cache index disable feature only for CPUs that support it

x86: cpu_debug: Remove model information to reduce encoding-decoding

2009-06-07T10:22:56+00:00

Remove model information, encoding/decoding and reduce bookkeeping. This, besides removing a lot of code and cleaning up the code, also enables these features on many more CPUs that were enumerated before. Reported-by: Ingo Molnar Signed-off-by: Jaswinder Singh Rajput Cc: Alan Cox LKML-Reference: <1244224637.8212.6.camel@ht.satnam> Signed-off-by: Ingo Molnar

x86: display extended apic registers with print_local_APIC and cpu_debug code

2009-05-11T12:37:36+00:00

Both print_local_APIC (used when apic=debug kernel param is set) and cpu_debug code missed support for some extended APIC registers that I'd like to see. This adds support to show: - extended APIC feature register - extended APIC control register - extended LVT registers [ Impact: print more debug info ] Signed-off-by: Andreas Herrmann Cc: Jaswinder Singh Rajput Cc: Cyrill Gorcunov LKML-Reference: <20090508162350.GO29045@alberich.amd.com> Signed-off-by: Ingo Molnar

x86: cpu_debug remove execute permission

2009-04-09T04:34:02+00:00

It seems by mistake these files got execute permissions so removing it. Signed-off-by: Jaswinder Singh Rajput LKML-Reference: <1239211186.9037.2.camel@ht.satnam> Signed-off-by: Ingo Molnar

x86: cpu_debug add support for various AMD CPUs

2009-03-14T17:07:58+00:00

Impact: Added AMD CPUs support Added flags for various AMD CPUs. Signed-off-by: Jaswinder Singh Rajput Signed-off-by: Ingo Molnar

x86: cpu_debug add write support for MSRs

2009-03-13T02:02:45+00:00

Supported write flag for registers. currently write is enabled only for PMC MSR. [root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value 0x0 [root@ht]# echo 1234 > /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value [root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value 0x4d2 [root@ht]# echo 0x1234 > /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value [root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value 0x1234 Signed-off-by: Jaswinder Singh Rajput Signed-off-by: Ingo Molnar

x86: cpu architecture debug code, build fix, cleanup

2009-03-11T13:52:03+00:00

move store_ldt outside the CONFIG_PARAVIRT section and also clean up the code a bit. Signed-off-by: Jaswinder Singh Rajput Signed-off-by: Ingo Molnar