On Mon, May 8, 2017 at 9:31 AM, Jan Kiszka <jan.kiszka@xxxxxxxxxxx> wrote: > On 2017-03-23 10:14, tip-bot for Andy Lutomirski wrote: >> The x86 smpboot trampoline expects initial_page_table to have the >> GDT mapped. If the GDT ends up in a virtually mapped per-cpu page, >> then it won't be in the page tables at all until perc-pu areas are >> set up. The result will be a triple fault the first time that the >> CPU attempts to access the GDT after LGDT loads the perc-pu GDT. >> >> This appears to be an old bug, but somehow the GDT fixmap rework >> is triggering it. This seems to have something to do with the >> memory layout. > This breaks the boot on our Intel Quark platform (IOT2000, similar to > Galileo Gen2). Reverting it over master makes it work again. Any idea > what goes wrong? Let me know how I can help debugging this. JFYI: As of today linux-next when _kexec:ed_ works fine to me Perhaps I can test this later with direct boot from SD card. -- With Best Regards, Andy Shevchenko -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
