[v2,0/3] AMD Nested Virt Preparation

Message

George Dunlap March 13, 2024, 12:24 p.m. UTC

This series lays the groundwork for revamp of the AMD nested virt
functionality.  The first two patches are clean-ups or reorganizations
of existing code.  The final patch is the first major step towards making
the feature supportable: allowing Xen to refuse nested virt support if certain
hardware features are not present.

George Dunlap (3):
  x86: Move SVM features exposed to guest into hvm_max_cpu_policy
  nestedsvm: Disable TscRateMSR
  svm/nestedsvm: Introduce nested capabilities bit

 docs/designs/nested-svm-cpu-features.md      | 111 +++++++++++++++++++
 xen/arch/x86/cpu-policy.c                    |  29 ++---
 xen/arch/x86/domain.c                        |   6 +
 xen/arch/x86/hvm/nestedhvm.c                 |  10 ++
 xen/arch/x86/hvm/svm/nestedsvm.c             |  16 ++-
 xen/arch/x86/hvm/svm/svm.c                   |  57 ----------
 xen/arch/x86/hvm/vmx/vvmx.c                  |   8 ++
 xen/arch/x86/include/asm/hvm/hvm.h           |  16 ++-
 xen/arch/x86/include/asm/hvm/nestedhvm.h     |   4 +
 xen/arch/x86/include/asm/hvm/svm/nestedsvm.h |   5 -
 10 files changed, 184 insertions(+), 78 deletions(-)
 create mode 100644 docs/designs/nested-svm-cpu-features.md