[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Debugging Dom0 on OMAP5
Hi Ian, On Thu, Oct 24, 2013 at 4:18 AM, Ian Campbell <ian.campbell@xxxxxxxxxx> wrote: > On Wed, 2013-10-23 at 20:13 -0400, Vaibhav Bedia wrote: > >> Looking at the logs i noticed that the initrd is located outside the >> phys area that kernel >> is aware of and hence getting ignored. >> >> [...] >> [0.000000] INITRD: 0x83000000+0x01000000 is not a memory region - >> disabling initrd >> >> In the bootargs i have specified the initrd > > Do you mean the bootargs given to Xen or the ones given to dom0? How > exactly did you do this. > I specified that in the bootargs being passed to Dom0. U-Boot# fdt set /chosen xen,dom0-bootargs \"console=hvc0,115200n8 vram=16M root=/dev/ram initrd=0x83000000,16M ramdisk_size=65536 rw earlyprintk=xen lpj=61440 nohlt\" >> to be located to >> 0x83000000 and that obviously isn't working. What is the right way to >> specify the initrd location to >> Dom0? Does it depend on where Xen relocates the initrd? > > Xen itself chooses where the initrd lives in the guest physical address > space, based on various constraints documented in > linux/Documentation/arm/booting.txt. This stuff is a bit new so I > suppose there could still be issues. Certainly if it is placing the > initrd outside of the guest's RAM area then that is a issue! > > For this to work you (or your bootloader) need to be specifying the > location of the initrd in the host memory space at boot time, Xen will > then copy it into guest space and setup the DT given to dom0 to > reference it. > Ok something odd happened just now. I formatted a micro-SD card to try out a filesystem that. I guess something went wrong in the formatting and that failed but the initrd got mounted! I think this happened because i replaced the initrd related stuff from dom0-bootargs with the ones for SD boot. To confirm this, i completely removed the root=<xyz> stuff from dom0-bootargs and now i can get the ramdisk to work fine. So, is not specifying anything in the dom0-bootargs the right way to make this thing work? Regards, Vaibhav _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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