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Re: [Xen-devel] x86 instruction emulation in hvm
| To: | Emre Can Sezer <ecsezer@xxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] x86 instruction emulation in hvm |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Tue, 12 May 2009 08:57:31 +0100 |
| Cc: | Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Tue, 12 May 2009 00:58:02 -0700 |
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| In-reply-to: | <4A08A389.9060200@xxxxxxxx> |
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| Thread-index: | AcnShgiFism+bJbDTsO9FtvJZ3vOTAAUUSTz |
| Thread-topic: | [Xen-devel] x86 instruction emulation in hvm |
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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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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