Re: [Xen-devel] frontend and backend devices and different types of hw - pci for example

[David Hopwood <david.nospam.hopwood@xxxxxxxxxxxxxxxx>]

Mark Williamson wrote:
> While I'm on the subject, I'd personally like to see guests granted IO access 
> slightly differently.  There are two ways to grant IO access on x86: change 
> the IOPL (giving the guest access to all IO ports) or set IO bits in the TSS 
> (giving fine grained control).  The problem with the latter is that guest 
> *apps* will be able to access the hardware; essentially x86 gives you coarse 
> grained control and ring-level protection, or vice-versa.
Could XenLinux use a different TSS to run its apps?

--
David Hopwood <david.nospam.hopwood@xxxxxxxxxxxxxxxx>

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