leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
48fd5b5ee7
linux/arch/x86/kernel/cpu
History
Tony Luck 48fd5b5ee7 x86/split_lock: Bits in IA32_CORE_CAPABILITIES are not architectural 
The Intel Software Developers' Manual erroneously listed bit 5 of the
IA32_CORE_CAPABILITIES register as an architectural feature. It is not.

Features enumerated by IA32_CORE_CAPABILITIES are model specific and
implementation details may vary in different cpu models. Thus it is only
safe to trust features after checking the CPU model.

Icelake client and server models are known to implement the split lock
detect feature even though they don't enumerate IA32_CORE_CAPABILITIES

[ tglx: Use switch() for readability and massage comments ]

Fixes: 6650cdd9a8 ("x86/split_lock: Enable split lock detection by kernel")
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200416205754.21177-3-tony.luck@intel.com
2020-04-18 12:48:44 +02:00
..
mce x86 entry code updates: 2020-03-30 19:14:28 -07:00
microcode x86/microcode/intel: Issue the revision updated message only on the BSP 2019-10-01 16:06:35 +02:00
mtrr proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
resctrl x86/resctrl: Preserve CDP enable over CPU hotplug 2020-04-17 19:35:01 +02:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
acrn.c x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR for ACRN guest upcall vector 2019-06-11 21:31:31 +02:00
amd.c Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2020-03-30 16:40:08 -07:00
aperfmperf.c x86/cpu: Disable frequency requests via aperfmperf IPI for nohz_full CPUs 2019-06-22 17:23:48 +02:00
bugs.c x86/bugs: Move enum taa_mitigations to bugs.c 2019-12-14 16:06:33 +01:00
cacheinfo.c x86/cacheinfo: Fix a -Wtype-limits warning 2019-06-19 19:21:32 +02:00
centaur.c x86/cpu: Remove redundant cpu_detect_cache_sizes() call 2020-01-20 16:32:35 +01:00
common.c Support for "split lock" detection: 2020-03-30 19:35:52 -07:00
cpu.h x86/intel: Initialize IA32_FEAT_CTL MSR at boot 2020-01-13 17:45:45 +01:00
cpuid-deps.c x86/cpufeatures: Enable a new AVX512 CPU feature 2019-07-22 10:38:25 +02:00
cyrix.c x86/cpu/cyrix: Use correct macros for Cyrix calls on Geode processors 2019-03-21 12:28:50 +01:00
feat_ctl.c x86/cpu: Fix a -Wmissing-prototypes warning for init_ia32_feat_ctl() 2020-03-23 12:01:59 +01:00
hygon.c x86: Remove X86_FEATURE_MFENCE_RDTSC 2019-07-22 12:00:51 +02:00
hypervisor.c x86/paravirt: Remove const mark from x86_hyper_xen_hvm variable 2019-07-17 08:09:59 +02:00
intel_epb.c x86: intel_epb: Do not build when CONFIG_PM is unset 2019-05-30 10:58:36 +02:00
intel_pconfig.c x86/pconfig: Detect PCONFIG targets 2018-03-12 12:10:54 +01:00
intel.c x86/split_lock: Bits in IA32_CORE_CAPABILITIES are not architectural 2020-04-18 12:48:44 +02:00
Makefile x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_* 2020-01-13 18:36:02 +01:00
match.c x86/cpu: Add consistent CPU match macros 2020-03-24 21:17:50 +01:00
mkcapflags.sh x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_* 2020-01-13 18:36:02 +01:00
mshyperv.c Merge branch 'linus' into x86/hyperv 2019-11-15 10:30:50 +01:00
perfctr-watchdog.c x86/events: Add Hygon Dhyana support to PMU infrastructure 2018-09-27 18:28:57 +02:00
powerflags.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
proc.c x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_* 2020-01-13 18:36:02 +01:00
rdrand.c x86/rdrand: Sanity-check RDRAND output 2019-10-01 19:55:32 +02:00
scattered.c x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h> 2019-12-10 10:12:55 +01:00
topology.c x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h> 2019-12-10 10:12:55 +01:00
transmeta.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tsx.c Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2020-01-28 12:46:42 -08:00
umc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
umwait.c x86/cpu: Move prototype for get_umwait_control_msr() to a global location 2020-02-17 19:32:45 +01:00
vmware.c x86/vmware: Use bool type for vmw_sched_clock 2020-03-24 10:29:22 +01:00
zhaoxin.c x86/cpu: Remove redundant cpu_detect_cache_sizes() call 2020-01-20 16:32:35 +01:00