Xen happens to be not vulnerable to PBRSB, but it turns out we can improve the
performance on all eIBRS systems.
Andrew Cooper (2):
x86/spec-ctrl: Enumeration for PBRSB_NO
x86/spec-ctrl: Reduce HVM RSB overhead where possible
xen/arch/x86/hvm/vmx/entry.S | 1 +
xen/arch/x86/hvm/vmx/vmx.c | 20 ++++++-
xen/arch/x86/include/asm/cpufeatures.h | 1 +
xen/arch/x86/include/asm/msr-index.h | 1 +
xen/arch/x86/msr.c | 5 +-
xen/arch/x86/spec_ctrl.c | 106 +++++++++++++++++++++++++++++++--
6 files changed, 126 insertions(+), 8 deletions(-)
--
2.11.0