Re: [Xen-devel] x86 instruction emulation in hvm

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 11/05/2009 23:15, "Emre Can Sezer" <ecsezer@xxxxxxxx> wrote:

> Yup.  Not only did hvm_get_segment_register() work like a charm, but I
> also ran into another problem as you have foretold.
> 
> The instruction is fxsave, which uses a mask to copy some CPU
> information to a 512byte memory.  Any chance of an emulation function
> for this instruction?

Go for it. ;-)

Define a 512-byte array, fxsave into it, and then write the array to guest
memory. Look at how some other FPU ops that write to memory are implemented
for further guidance.

 -- Keir



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