[Xen-devel] [RFC PATCH 0/5] x86: Multiple fixes to MSR_TSC_AUX and RDTSCP handling for guests

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

This rats nest was discovered when finding that MSR_TSC_AUX leaked into PV
guests.  It is RFC because I haven't done extensive testing on the result, and
because there are some functional changes for the virtualised TSC modes.

Andrew Cooper (5):
  x86/hvm: Don't shadow the domain parameter in hvm_save_cpu_msrs()
  x86/pv: Avoid leaking other guests' MSR_TSC_AUX values into PV context
  x86/time: Rework pv_soft_rdtsc() to aid further cleanup
  x86/pv: Remove deferred RDTSC{,P} handling in pv_emulate_privileged_op()
  x86: Rework MSR_TSC_AUX handling from scratch.

 xen/arch/x86/domain.c                       |  5 ++-
 xen/arch/x86/domctl.c                       | 15 ++++++++-
 xen/arch/x86/hvm/hvm.c                      | 51 ++++++++++++++++++++---------
 xen/arch/x86/hvm/svm/svm.c                  |  4 +--
 xen/arch/x86/hvm/vmx/vmx.c                  |  4 +--
 xen/arch/x86/msr.c                          | 18 ++++++++++
 xen/arch/x86/pv/emul-inv-op.c               |  5 ++-
 xen/arch/x86/pv/emul-priv-op.c              | 30 ++---------------
 xen/arch/x86/time.c                         | 19 +++++++----
 xen/arch/x86/x86_emulate/x86_emulate.c      |  1 +
 xen/include/asm-x86/hvm/hvm.h               |  6 ----
 xen/include/asm-x86/hvm/vcpu.h              |  1 -
 xen/include/asm-x86/msr.h                   | 25 ++++++++++++--
 xen/include/asm-x86/time.h                  |  2 +-
 xen/include/public/arch-x86/cpufeatureset.h |  2 +-
 xen/include/public/arch-x86/hvm/save.h      |  2 ++
 xen/tools/gen-cpuid.py                      |  3 ++
 17 files changed, 123 insertions(+), 70 deletions(-)

-- 
2.1.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel