aes-ni support in kvm linode

Hello,

I noticed that the aes-ni cpuflag isn't exposed to kvm guests.

Is there any specific reason for this or does my kernel has a problem detecting it ?

I'm running version 4.1.3 of the kernel, so it should be recent enough to support it.

3 Replies

Has no one any infos on this ?

I just want to be sure thats not a kernel issue.

Here are the detected flags:

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constanttsc archperfmon repgood nopl eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse41 sse42 x2apic movbe popcnt tscdeadlinetimer xsave avx f16c rdrand hypervisor lahflm abm fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt

poti, yup seeing same issue with KVM Xeon E5-2680v3 missing aes flag while Xeon E5-2680v3 KVM has the flag and makes all the difference with 2x performance in openssl speed -evp tests see https://community.centminmod.com/posts/17628/

poti, Linode is working to enable aes cpu flag on their KVMs.. I just migrated to a Linode KVM with E5-2680v3 and aes enabled https://community.centminmod.com/posts/17850/ :)

Might want to ask Linode support about migrating you to a KVM Linode with aes enabled :)

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