[edk2-devel] EFI shell with microvm

Boeuf, Sebastien sebastien.boeuf at intel.com
Mon Jan 10 09:05:41 UTC 2022


On Mon, 2022-01-10 at 00:16 +0000, Xu, Min M wrote:
> On January 7, 2022 9:37 PM, Gerd Hoffmann wrote:
> > 
> > > > tianocore doesn't use interrupts (other than timer).
> > > 
> > > Yes I realized that by diving into the code. I can see microvm
> > > using
> > > the Xen timer while OvmfPkgX64 uses 8254 PIT.
> > 
> > Min, what happened to the patch series changing that?
> Hi Gerd, What do you mean "the patch series"? Is this one?  
> https://edk2.groups.io/g/devel/message/83488
> It is still in review and hasn't been merged.
> > 
> > (the plan is to always use the lapci except when compiling with
> > csm  enabled
> > because pit/pic support is needed for backward compatibility 
> > reasons then).
> Yes, we use CSM_ENABLE to switch the lapic timer or 8254 timer in
> build time.
> This is the v3 which has been reviewed.  
> https://github.com/tianocore/edk2/pull/2167

Oh I see, that's great actually because as I mentioned earlier this is
not Xen specific, therefore I really think the renaming you're doing is
important.

> > 
> Thanks
> Min

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