[Xen-devel] [PATCH 0/4] x86: Drop PVRDTSCP and fix MSR_TSC_AUX handling for guests

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

Boris has confirmed that noone appears to be using PVRDTSCP any more, and in
the decade since it was introduced, guest kernel / hardware support has
provided a better alternative.

Andrew Cooper (4):
  x86: Begin to remove TSC mode PVRDTSCP
  x86/pv: Remove deferred RDTSC{,P} handling in pv_emulate_privileged_op()
  x86/msr: Handle MSR_TSC_AUX consistently for PV and HVM guests
  x86/pv: Expose RDTSCP to PV guests

 xen/arch/x86/domain.c                       |  3 +--
 xen/arch/x86/domctl.c                       |  5 ++++-
 xen/arch/x86/hvm/hvm.c                      | 18 +++++----------
 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               | 27 +---------------------
 xen/arch/x86/pv/emul-priv-op.c              | 32 +-------------------------
 xen/arch/x86/time.c                         | 35 -----------------------------
 xen/include/asm-x86/hvm/hvm.h               |  6 -----
 xen/include/asm-x86/hvm/vcpu.h              |  1 -
 xen/include/asm-x86/msr.h                   |  8 +++++++
 xen/include/asm-x86/time.h                  |  6 +----
 xen/include/public/arch-x86/cpufeatureset.h |  2 +-
 14 files changed, 44 insertions(+), 125 deletions(-)

-- 
2.1.4


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