tgingold@xxxxxxx (on Mon, 25 Feb 2008 13:54:48 +0100) wrote: >Quoting Keith Owens <kaos@xxxxxxxxxx>: >{...} >> A combination of options (2) and (3) would work. Have a single source >> file for the IVT, using conditional macros. Use that source file to >> build (at least) two copies of the IVT, for native and any virtualized >> modes. The native copy of the IVT starts at label ia64_ivt in section >> .text.ivt, as it does now. Any IVT versions for virtualized mode are >> defined as __cpuinitdata, so they are discarded after boot, unless >> CONFIG_HOTPLUG_CPU=y. arch/ia64/kernel/head.S copies the relevant >> virtualized version over ia64_ivt when necessary, before initializing >> cr.iva. >> >> Single source for maintenance. No indirect function overhead at run >> time. Binary patching at boot time for the right mode. No wasted >> space in the kernel. > >Good idea. The linker script will be slightly more complex however... Don't see why the linker script needs to change at all. The existing native IVT is at label ia64_ivt in section .text.ivt, as it is now. arch/ia64/kernel/head.S simply overwrites ia64_ivt with 32K of data for the virtualized IVT, copying from another data area. AFAICT, nothing in that process requires linker changes. - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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