[Xen-devel] [PATCH 0/2] Fixes to RDTSCP interception

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

For some reason (on EPYC at least) we've gained a regression into master
whereby VMs are defaulting to one of the emulated TSC modes.  This may be Xen
coming to the conclusion that there isn't a reliable TSC.  Combined with a
debug Xen, this breaks RDTSCP completely.

With this series in place and RDTSCP functioning correctly again, VMs are
still unwilling to boot.  I haven't managed to figure out why yet.

Andrew Cooper (2):
  x86/svm: Improve diagnostics when __get_instruction_length_from_list() fails
  x86/hvm: Corrections to RDTSCP intercept handling

 xen/arch/x86/hvm/svm/emulate.c        | 27 ++++++++++++++++++++-------
 xen/arch/x86/hvm/svm/svm.c            | 22 +++++++++++++++++-----
 xen/arch/x86/hvm/vmx/vmx.c            |  8 ++++++++
 xen/include/asm-x86/hvm/svm/emulate.h |  1 +
 4 files changed, 46 insertions(+), 12 deletions(-)

-- 
2.1.4


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