Le sam. 7 avr. 2018 08:26, <brendan.h...@gmail.com> a écrit :

> On Friday, April 6, 2018 at 9:27:11 PM UTC-4, Drew White wrote:
> > On Saturday, 7 April 2018 10:41:13 UTC+10, Thierry Laurion  wrote:
> > > You seem to have misunderstood. Ivy bridge and beyond on the Intel
> side will provide you with SLAT capabilities, IOMMU and virtualization,
> which is all that is required.  A x230 with 16gb ram and a i5 or i7 will
> provide you akk the power needed if you have an sad drive.
> >
> > I only went on what I was told. I have Ivy Bridge, and they don't have
> SLAT.
>
> Which CPU in particular? Did you look it up at the following link?
>   https://ark.intel.com/Search/FeatureFilter?productType=processors
>
> > At least, they don't SAY they do.
>
SLAT exist on Intel i3 i5 and i7 from their first generation (nehalem). Its
nothing new.

https://en.m.wikipedia.org/wiki/Second_Level_Address_Translation

Check Qubes HCL:
https://www.qubes-os.org/hcl/



> Which "they" are we talking about? If you mean Intel, they are on top of
> keeping the ark pages updated with this information.
>
> > Do they sometimes not say they have it even when they do?
>
> I doubt it. But CPU-reporting tools might misreport information due to a
> bug, or might report how the BIOS has configured the CPU rather than what
> the CPU is capable of.
>
> In addition to the CPU having to support certain features, many
> manufacturers don't enable the requisite virtualization features in the
> BIOS startup. Ignoring the closed-source firmware controversy (I don't want
> engage deeply on that, other than to say there are some complex ways of
> working around the BIOS issues with coreboot, etc. but there is no
> guarantee)...the BIOS issue is why I would recommend Thinkpad and Dell
> workstation-laptops from 2011 onward if the installed CPU has been verified
> in ARK* to have the supported features: VT-x with EPT or RVI *AND* VT-d or
> AMD-Vi aka IOMMU. These manufacturers went out of their way to do things
> correctly for their business-oriented machines, ensuring that all the
> higher-end CPU features could be utilized.
>
> E.g. why the "manufactured after 20xx" approach does not work...
>
> - I have a stack of purchased-used Thinkpad W520s here: manufactured in
> 2011 and 2012, they meet the prerequisites, as they have Sandy Bridge CPUs
> and proper support in BIOS.
>
> Sadly the embedded CPU in my GPX Pocket, manufactured in 2017, has an Atom
> x7-Z8750 (Cherry Trail family of power-efficient CPUs). While that CPU was
> released to market in 2016, and while it support VT-x, both EPT and VT-d
> are missing, so no QUBES 4.0 support. :(
>
> Last caveat: some Intel CPUs had broken support for these features in
> early steppings (manufacturer run tweaks), e.g. this one, which did not
> support EPT until the C2 stepping:
> https://ark.intel.com/products/63697/Intel-Core-i7-3930K-Processor-12M-Cache-up-to-3_80-GHz
>
> Brendan
>
> * AMD likely has a similar site to Intel's ARK site for use in gathering
> information on CPU features, but I haven't dug into that.
>
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