Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\cpu\bugs.c Create Date:2022-07-28 07:56:18
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:cpu_bugs_smt_update

Proto:void cpu_bugs_smt_update(void)

Type:void

Parameter:Nothing

915  mutex_lock( & spec_ctrl_mutex)
918  Case spectre_v2_user == SPECTRE_V2_USER_NONE
919  Break
920  Case spectre_v2_user == SPECTRE_V2_USER_STRICT
921  Case spectre_v2_user == SPECTRE_V2_USER_STRICT_PREFERRED
922  Update x86_spec_ctrl_base in case SMT state changed.
923  Break
924  Case spectre_v2_user == SPECTRE_V2_USER_PRCTL
925  Case spectre_v2_user == SPECTRE_V2_USER_SECCOMP
926  Update the static key controlling the evaluation of TIF_SPEC_IB
927  Break
931  Case Default mitigation for MDS-affected CPUs == MDS_MITIGATION_FULL
932  Case Default mitigation for MDS-affected CPUs == MDS_MITIGATION_VMWERV
933  If sched_smt_active() && Not boot_cpu_has(CPU is only affected by the MSDBS variant of BUG_MDS ) Then pr_warn_once(MDS_MSG_SMT)
935  Update the static key controlling the MDS CPU buffer clear in idle
936  Break
937  Case Default mitigation for MDS-affected CPUs == MDS_MITIGATION_OFF
938  Break
942  Case Default mitigation for TAA-affected CPUs == TAA_MITIGATION_VERW
943  Case Default mitigation for TAA-affected CPUs == TAA_MITIGATION_UCODE_NEEDED
944  If sched_smt_active() Then pr_warn_once(TAA_MSG_SMT)
946  Break
947  Case Default mitigation for TAA-affected CPUs == TAA_MITIGATION_TSX_DISABLED
948  Case Default mitigation for TAA-affected CPUs == TAA_MITIGATION_OFF
949  Break
952  mutex_unlock( & spec_ctrl_mutex)