Ubuntu
qemu package

  1. Bug #1887490
  2. Comment #49

Comment 49 for bug 1887490

Revision history for this message
Venkatesh Srinivas (venkatesh-srinivas) wrote :

Hi - commit 411a139d84bd34931e0e01d6ed5e48a718392e5d added svm_xsaves_support, but AFAICT support for virtualizing the IA32_XSS MSR on SVM was not merged back from upstream. Commit 864e2ab2b46db1ac266c46a7c9cefe6cc893029d added this support upstream and was a parent of 411a13.

This means QEMU-KVM will report xsaves in CPUID, but IA32_XSS will not be available; guests that expect it to be present when xsaves is enumerated may be surprised.