[CentOS] How to enable the svm cpu flag inside a vm?

Sun Sep 25 14:38:39 UTC 2016
Leonard den Ottolander <leonard at den.ottolander.nl>


On Fri, 2016-09-23 at 15:05 +0200, Leonard den Ottolander wrote:
> So the question is: How do I enable the svm flag in the guest?

The qemu-kvm option "-enable-nesting" that I dug up in the source looks
promising. No mention in the man page on either C6 or C7 but it is
mentioned here:

How do I pass the "-enable-nesting" option to qemu-kvm using either
virt-manager.py, virsh or the domain xml?

Hoping to avoid having to patch the source a such:

--- qemu-kvm-	2009-12-29 21:46:34.000000000 +0100
+++ qemu-kvm-	2016-09-25 16:35:02.984334623 +0200
@@ -1811,8 +1811,10 @@ void cpu_x86_cpuid(CPUX86State *env, uin
             /* disable CPU features that KVM cannot support */
             /* svm */
             if (!kvm_nested)
                 *ecx &= ~CPUID_EXT3_SVM;
             /* 3dnow */
             *edx &= ~0xc0000000;
         } else {


mount -t life -o ro /dev/dna /genetic/research