[PATCH 0/3] Check enumeration before MSR save/restore

[Pawan Gupta]

Hi,

This patchset is to fix the "unchecked MSR access error" [1] during S3
resume. Patch 1/3 adds a feature bit for MSR_IA32_TSX_CTRL.

Patch 2/3 adds a feature bit for MSR_AMD64_LS_CFG.

Patch 3/3 adds check for feature bit before adding any speculation
control MSR to the list of MSRs to save/restore.

[1] https://lore.kernel.org/lkml/20220906201743.436091-1-hdegoede@xxxxxxxxxx/

Pawan Gupta (3):
  x86/tsx: Add feature bit for TSX control MSR support
  x86/cpu/amd: Add feature bit for MSR_AMD64_LS_CFG enumeration
  x86/pm: Add enumeration check before spec MSRs save/restore setup

 arch/x86/include/asm/cpufeatures.h |  2 ++
 arch/x86/kernel/cpu/amd.c          |  3 +++
 arch/x86/kernel/cpu/tsx.c          | 30 +++++++++++++++---------------
 arch/x86/power/cpu.c               | 23 ++++++++++++++++-------
 4 files changed, 36 insertions(+), 22 deletions(-)


base-commit: 80e78fcce86de0288793a0ef0f6acf37656ee4cf
-- 
2.37.2