[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Re: Xen refuses to load minimal dom0 kernel
Grzegorz Milos wrote: I am trying to link a minimal Domain 0 kernel (adapted from the Mini-OS), but when Xen tries to build the Domain 0 it panics:"Domain 0 allocation is too small for kernel image." which is caused by the following code in xen/arch/x86/domain_build.c: order = get_order_from_bytes(v_end - dsi.v_start); if ( (1UL << order) > nr_pages ) panic("Domain 0 allocation is too small for kernel image.\n");The linker script I am using is adapted from the Mini-OS and links .text at 0xC0000000 + 0x100000, just like the Linux kernel does. Does any one has any hints what I am doing wrong and what this test actually checks for?Mini-OS assumes .text at 0x0. Since you've changed that, you better make corresponding changes to VIRT_BASE and ELF_PADDR_OFFSET in mini-os/arch/x86/x86_32.S. If that does not help, could you send an output of the following printk added just before the if statement?printk("v_start=%lx v_end=(%lx, %lx)\n", dsi.v_start, v_end, dsi.v_end); I finally got it to work by closely following what the startup code and linker script of the Linux kernel do. Is there any documentation on what the hypervisor expects from a Domain 0 and in general how the Domain 0 environment differs from that of a DomU (e.g., memory management, console, xenbus)? Regards, Julian _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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