On 7/6/06, Tharindu Rukshan Bamunuarachchi <tharindub@xxxxxxxxx> wrote:
AFAIK, This is only applies to virtualization context. I think Xen uses this, if i am not wrong. I thought Gaurav was asking about "traditional" ring zero.
I was not asking .... rather telling about tradition ring 0 ... :-) well what is this ring 0 for vm and how it is different from tradition ring 0. As the mode of processor is defined by 2 LSB bits of CS register, how is this ring 0 for VM represented there and what previlieges are restriced in this ?? regards, Gaurav
Regards, Tharindu On 7/6/06, Greg Freemyer <greg.freemyer@xxxxxxxxx> wrote: > On 7/6/06, Tharindu Rukshan Bamunuarachchi <tharindub@xxxxxxxxx > wrote: > > > > Hi All, > > > > You better ask this as, > > > > What process can not do in ring 0??? > > > > Process can do anything, like God. > > > > > > > > You can refer Intel's IA-32 architecutre manuals to get more info about > > this. > > > > http://www.intel.com/design/pentiumii/manuals/243190.htm > > > > > > Tharindu > Tharindu, > > Your 6 months out of date. > > AIUI, Ring 0 now has 2 sub-modes. The fully priveledged mode you > imply is used for tradional operating systems and for the host os in a > virtual machine (vm) setup. > > The new restricted ring 0 sub-mode is designed for guest os'es in a vm setup. > -- > Greg Freemyer > The Norcross Group > Forensics for the 21st Century >
-- Gaurav Email: gauravd.chd@xxxxxxxxx -------------------------------------------- Read my articles at: http://lkdp.blogspot.com -------------------------------------------- Easy to get air tickets at affordable price, US to India Air Tickets: www.Ritz-Travel.com Call at 001-503-848-2299 or mail at info@xxxxxxxxxxxxxxx -------------------------------------------- -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
