Kim Phillips e2abfc0448 x86/cpu/amd: Make erratum #1054 a legacy erratum ...

Commit

  21b5ee59ef ("x86/cpu/amd: Enable the fixed Instructions Retired
		 counter IRPERF")

mistakenly added erratum #1054 as an OS Visible Workaround (OSVW) ID 0.
Erratum #1054 is not OSVW ID 0 [1], so make it a legacy erratum.

There would never have been a false positive on older hardware that
has OSVW bit 0 set, since the IRPERF feature was not available.

However, save a couple of RDMSR executions per thread, on modern
system configurations that correctly set non-zero values in their
OSVW_ID_Length MSRs.

[1] Revision Guide for AMD Family 17h Models 00h-0Fh Processors. The
revision guide is available from the bugzilla link below.

Fixes: 21b5ee59ef ("x86/cpu/amd: Enable the fixed Instructions Retired counter IRPERF")
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200417143356.26054-1-kim.phillips@amd.com
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537

2020-05-07 17:30:14 +02:00

..

mce

Merge tag 'x86-entry-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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

x86/cpu/amd: Make erratum #1054 a legacy erratum

2020-05-07 17:30:14 +02:00

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

Merge tag 'x86-splitlock-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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: Add Tremont family CPU models

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 a steppings field to struct x86_cpu_id

2020-04-20 12:19:21 +02:00

mkcapflags.sh

x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_*

2020-01-13 18:36:02 +01:00

mshyperv.c

x86/Hyper-V: Report crash register data or kmsg before running crash kernel

2020-04-11 17:19:06 +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