From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Que Subject: Re: Domain0/Domain 1 and ring1 (x86) - tracing question Date: Thu, 18 Aug 2005 07:54:46 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "Petersson, Mats" Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Hello,=20 Thanks;=20 This uses FLAT_KERNEL_CS (and not BOOT_CS).=20 (It could be that BOOT_CS is not needed at all. As I said, I had grepped for BOOT_CS and not for other defintions like FLAT_KERNEL_CS). However,this satisfies me and it gives answer to my question. Regarding build - I have no problem with build. It went OK. Regads, John On 8/18/05, Petersson, Mats wrote: > How about: >=20 > Arch/x86/domain.c: new_thread(). >=20 > That function is called from arch/x86/domain_build.c when building dom0, >=20 >=20 > 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. >=20 > -- > Mats >=20 > > -----Original Message----- > > From: John Que [mailto:qwejohn@gmail.com] > > Sent: 18 August 2005 11:28 > > To: Petersson, Mats > > Cc: xen-devel@lists.xensource.com > > 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 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 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=3D1 (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@lists.xensource.com > > > > > [mailto:xen-devel-bounces@lists.xensource.com] On > > Behalf Of John > > > > > Que > > > > > Sent: 16 August 2005 11:59 > > > > > To: xen-devel@lists.xensource.com > > > > > 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@lists.xensource.com > > > > > http://lists.xensource.com/xen-devel > > > > > > > > > > > > > > > > > > >=20 >