AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/x86/kernel/cpu
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Borislav Petkov bc696ca05f x86/cpufeature: Replace the old static_cpu_has() with safe variant 
So the old one didn't work properly before alternatives had run.
And it was supposed to provide an optimized JMP because the
assumption was that the offset it is jumping to is within a
signed byte and thus a two-byte JMP.

So I did an x86_64 allyesconfig build and dumped all possible
sites where static_cpu_has() was used. The optimization amounted
to all in all 12(!) places where static_cpu_has() had generated
a 2-byte JMP. Which has saved us a whopping 36 bytes!

This clearly is not worth the trouble so we can remove it. The
only place where the optimization might count - in __switch_to()
- we will handle differently. But that's not subject of this
patch.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1453842730-28463-6-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-30 11:22:18 +01:00
..
mcheck Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-01-11 15:07:19 -08:00
microcode Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-01-11 16:46:20 -08:00
mtrr x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
.gitignore
amd.c x86/cpu/amd: Remove an unneeded condition in srat_detect_node() 2016-01-14 09:46:00 +01:00
bugs_64.c x86/cpu: Clean up various files a bit 2009-07-11 11:24:09 +02:00
bugs.c x86/fpu: Move various internal function prototypes to fpu/internal.h 2015-05-19 15:47:48 +02:00
centaur.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
common.c x86/cpufeature: Replace the old static_cpu_has() with safe variant 2016-01-30 11:22:18 +01:00
cpu.h x86/cpu: Restore MSR_IA32_ENERGY_PERF_BIAS after resume 2015-07-21 07:51:38 +02:00
cyrix.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
hypervisor.c hypervisor/x86/xen: Unset X86_BUG_SYSRET_SS_ATTRS on Xen PV guests 2015-05-05 18:27:43 +01:00
intel_cacheinfo.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
intel_pt.h perf/x86/intel/pt: Clean up files of Intel Processor Trace 2015-08-12 11:43:22 +02:00
intel.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
Makefile x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
match.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
mkcapflags.sh x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
mshyperv.c x86/hyperv: Fix the build in the !CONFIG_KEXEC_CORE case 2015-09-30 07:44:15 +02:00
perf_event_amd_ibs.c perf/x86/amd/ibs: Convert force_ibs_eilvt_setup() to void 2015-02-18 17:01:46 +01:00
perf_event_amd_iommu.c cpumask: factor out show_cpumap into separate helper function 2014-11-07 11:45:00 -08:00
perf_event_amd_iommu.h perf/x86/amd: AMD IOMMU Performance Counter PERF uncore PMU implementation 2013-06-19 13:04:53 +02:00
perf_event_amd_uncore.c x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros 2015-12-19 11:49:55 +01:00
perf_event_amd.c Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-01-11 16:26:03 -08:00
perf_event_intel_bts.c perf/x86/intel/bts: Disallow use by unprivileged users on paranoid systems 2015-09-13 11:27:22 +02:00
perf_event_intel_cqm.c perf/core: Robustify the perf_cgroup_from_task() RCU checks 2015-11-23 09:21:03 +01:00
perf_event_intel_cstate.c perf/x86: Add Intel cstate PMUs support 2015-10-06 17:31:51 +02:00
perf_event_intel_ds.c perf/x86: Enable cycles:pp for Intel Atom 2016-01-06 11:15:34 +01:00
perf_event_intel_lbr.c perf/x86/intel: Add perf core PMU support for Intel Knights Landing 2016-01-06 11:15:37 +01:00
perf_event_intel_pt.c perf/x86/intel/pt: Add interface to stop Intel PT logging 2015-11-23 09:58:26 +01:00
perf_event_intel_rapl.c perf/x86/rapl: Use unified perf_event_sysfs_show instead of special interface 2016-01-06 11:15:35 +01:00
perf_event_intel_uncore_nhmex.c perf/x86/uncore: Fix coccinelle warnings 2014-08-13 07:51:09 +02:00
perf_event_intel_uncore_snb.c perf/x86/intel/uncore: Add Knights Landing uncore PMU support 2016-01-06 11:15:38 +01:00
perf_event_intel_uncore_snbep.c perf/x86/intel/uncore: Add Knights Landing uncore PMU support 2016-01-06 11:15:38 +01:00
perf_event_intel_uncore.c perf/x86/intel/uncore: Add Knights Landing uncore PMU support 2016-01-06 11:15:38 +01:00
perf_event_intel_uncore.h perf/x86/intel/uncore: Add Knights Landing uncore PMU support 2016-01-06 11:15:38 +01:00
perf_event_intel.c perf/x86/intel: Add perf core PMU support for Intel Knights Landing 2016-01-06 11:15:37 +01:00
perf_event_knc.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
perf_event_msr.c arch/x86/kernel/cpu/perf_event_msr.c: use sign_extend64() for sign extension 2015-11-06 17:50:42 -08:00
perf_event_p4.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
perf_event_p6.c perf/x86/intel/p6: Add userspace RDPMC quirk for PPro 2014-02-09 13:08:24 +01:00
perf_event.c perf/x86: Fix filter_events() bug with event mappings 2016-01-06 11:15:33 +01:00
perf_event.h perf/x86/intel: Add perf core PMU support for Intel Knights Landing 2016-01-06 11:15:37 +01:00
perfctr-watchdog.c perf/x86: Add support for Intel Xeon-Phi Knights Corner PMU 2012-10-04 13:32:37 +02:00
powerflags.c update AMD powerflags comments 2013-05-28 12:02:10 +02:00
proc.c x86: Replace cpu_**_mask() with topology_**_cpumask() 2015-05-27 15:22:17 +02:00
rdrand.c x86: Replace RDRAND forced-reseed with simple sanity check 2015-11-25 22:46:43 +01:00
scattered.c x86/cpufeature: Move some of the scattered feature bits to x86_capability 2015-12-19 11:49:53 +01:00
topology.c x86: delete __cpuinit usage from all x86 files 2013-07-14 19:36:56 -04:00
transmeta.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
umc.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
vmware.c x86: Correctly detect hypervisor 2013-08-05 06:35:33 -07:00