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[v3,|,v5.4,0/3] x86/kvm: fixes for hibernation

Message ID 20210531140347.42681-1-krzysztof.kozlowski@canonical.com
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Series x86/kvm: fixes for hibernation | expand

Message

Krzysztof Kozlowski May 31, 2021, 2:03 p.m. UTC 
Hi,

This is version 2 of a backport for v5.4.

Changes since v2:
1. Send proper backport without context changes,
2. This series is only for v5.4.

Changes since v1:
1. Clean backport, without context changes.


The first patch specifically fixes bug aftert 2nd resume:
  BUG: Bad page state in process dbus-daemon  pfn:18b01
  page:ffffea000062c040 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 compound_mapcount: -30591
  flags: 0xfffffc0078141(locked|error|workingset|writeback|head|mappedtodisk|reclaim)
  raw: 000fffffc0078141 dead0000000002d0 dead000000000100 0000000000000000
  raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
  page dumped because: PAGE_FLAGS_CHECK_AT_PREP flag set
  bad because of flags: 0x78141(locked|error|workingset|writeback|head|mappedtodisk|reclaim)

Best regards,
Krzysztof

Vitaly Kuznetsov (3):
  x86/kvm: Teardown PV features on boot CPU as well
  x86/kvm: Disable kvmclock on all CPUs on shutdown
  x86/kvm: Disable all PV features on crash

 arch/x86/include/asm/kvm_para.h | 10 +---
 arch/x86/kernel/kvm.c           | 92 ++++++++++++++++++++++++---------
 arch/x86/kernel/kvmclock.c      | 26 +---------
 3 files changed, 72 insertions(+), 56 deletions(-)