RE: [Xen-devel] Domain0/Domain 1 and ring1 (x86) - tracing question

["Petersson, Mats" <mats.petersson@xxxxxxx>]

How about:

Arch/x86/domain.c: new_thread(). 

That function is called from arch/x86/domain_build.c when building dom0,


I can't help you with tracing the domU build at the moment (I've got a
job to do... ;-). Myabe someone else can pipe in with some more info.

--
Mats

> -----Original Message-----
> From: John Que [mailto:qwejohn@xxxxxxxxx] 
> Sent: 18 August 2005 11:28
> To: Petersson, Mats
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Domain0/Domain 1 and ring1 (x86) - 
> tracing question
> 
> Hello ,
> Does anybody knows the answer/any hint to my question  ? 
> Any ideas ,  someone? 
> 
> Regards,
> John
> 
> On 8/16/05, John Que <qwejohn@xxxxxxxxx> wrote:
> > Hello,
> > 
> > Thanks !
> > 
> > This makes clear things a bit.
> > 
> > However, I had grepped under the linux-2.6-xen-sparse tree and saw 
> > only one occurrence of  BOOT_CS , in that 
> > linux-2.6-xen-sparse/include/asm-xen/asm-i386/segment.h.
> > 
> > I had also grepped under the "xen" (hypervisor) subtree and did not 
> > find and also under linux-2.6.12-xen0/arch/xen and did not find any 
> > occurrence of  BOOT_CS.
> > 
> > (There is of course in 
> linux-2.6.12-xen0/arch/xen/i386/boot/setup.S , 
> > but this seems unrelevant in our case).
> > 
> > I am probably missing something;
> >  Any ideas ?
> > 
> > Regards,
> > John
> > 
> > On 8/16/05, Petersson, Mats <mats.petersson@xxxxxxx> wrote:
> > > There's a #define in arch-x86_32.h that defines 
> FLAT_KERNEL_[CDS]S 
> > > to FLAT_RING1_[CDS]S. FLAT_RING1_[CDS]S is the entry in GDT for a 
> > > CPL=1 (ring 1) code/data/stack[1] segment selector.
> > > It is then used in various places to set up the registers used by 
> > > the actual kernel, for example the file 
> > > linux-2.6-xen-sparse/include/asm-xen/asm-i386/segment.h 
> is using the 
> > > KERNEL_CS to give the BOOT_CS to the Linux kernel.
> > >
> > > [1] Stack segment is actually using the same selector as the data 
> > > segment.
> > >
> > > --
> > > Mats
> > >
> > > > -----Original Message-----
> > > > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> > > > [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On 
> Behalf Of John 
> > > > Que
> > > > Sent: 16 August 2005 11:59
> > > > To: xen-devel@xxxxxxxxxxxxxxxxxxx
> > > > Subject: [Xen-devel] Domain0/Domain 1 and ring1 (x86) - tracing 
> > > > question
> > > >
> > > > Hello,
> > > > As I understand the Hypervisor should run in Ring 0 of the
> > > > x86 , and the domains (Domain0 and DomainU) should work 
> in Ring 1.
> > > >
> > > > I was a bit curious where in the code this assiging of 
> Ring 0 to 
> > > > Xen and Ring 1 to dom0/domU is done ?
> > > > I had tried to look under arch/xen/i386 and didn't find.
> > > >
> > > > Is it in the assembler *.S files ?
> > > >
> > > > Regards,
> > > > John
> > > >
> > > > _______________________________________________
> > > > Xen-devel mailing list
> > > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > > http://lists.xensource.com/xen-devel
> > > >
> > >
> > >
> >
> 


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