Thanks, Shankar. On Sun, Oct 8, 2023 at 10:41 AM Shankar Viswanathan < [email protected]> wrote:
> On 10/8/23 03:01, John Abreau wrote: > > I figure Intel uses terminology other than "x86-64-v2", but I have no > idea > what their terminology is. None of my google searches have found anything > helpful. > > How can I determine whether a given cpu type is "x86-64-v2" compatible? > > > You have my sympathies! Intel and AMD each use a different terminology and > for some reason the software vendors have decided to use yet other > confusing names for the same set of features. x86-64 (aka AMD64) itself > keeps evolving, but neither AMD nor Intel have established a versioning > scheme on the ISA itself, so I personally do not like this "x86-64-v2" > naming. The features being discussed here are specific to virtualization > support, not the whole ISA. The basic HW virtualization support is called > SVM or AMD-V by AMD, and VT-x by Intel. > > Broadly, there are two features that have been labeled as "v2" in this > context: > 1. Support for second level address translations (aka SLAT): AMD calls > this Nested Page Tables (NPT), and Intel calls it Extended Page Tables (EPT) > 2. Support for I/O virtualization: AMD calls this IOMMUv2 or AMD-Vi, and > Intel refers to this as VT-d > > As pointed out in the previous comment, most server/workstation/desktop > processors from Intel and AMD have supported these features for at least a > decade. There are certain products and SKUs that may not support it > (typically only lower end products), so it is best to read the spec summary > from AMD or Intel to confirm. > > Specific to your question about Xeon E5-2690 V2, see: > > https://www.intel.com/content/www/us/en/products/sku/75279/intel-xeon-processor-e52690-v2-25m-cache-3-00-ghz/specifications.html > > If you scroll down to the "Security and Reliability" section, you'll > notice that both VT-d and EPT are supported. So you should be good on that > front. Often, these features are not enabled by default in the BIOS, so > please make sure to turn them on if you intend to run VMs on the machine. > Once you're booted into Linux, you can check /proc/cpuinfo or run `lscpu` > to verify that the "vmx", and "ept" flags are present (AMD equivalents will > be "svm" and "npt"). > > -Shankar > > > > > > > -- John Abreau / Executive Director, Boston Linux & Unix Email: [email protected] / WWW http://www.abreau.net / PGP-Key-ID 0x920063C6 PGP-Key-Fingerprint A5AD 6BE1 FEFE 8E4F 5C23 C2D0 E885 E17C 9200 63C6 _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
