Hi, I've been having trouble booting NetBSD-9 on my UEFI-enabled Asus laptop. Long story short, the boot procedure crashes early with the following dmesg output:
efi: systbl at pa ca0d9f18 uvm_fault(0xffffffff81714c20, 0xffffe0f8b46d9000, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip 0xffffffff8023cac7 cs 0x8 rflags 0x10246 cr2 0xffffe0f8b46d9f28 ilevel 0x8 rsp 0xffffffff81b06e50 curlwp 0xffffffff816574a0 pid 0.1 lowest kstack 0xffffffff81b022c0 With help on IRC, we've been able to debug this a bit. This rip points out to line 350 of efi.c [1], that is the first aprint_debug() in efi_is32x64 condition. jak suggested that this condition is probably evaluated wrongly as I'm using the 64-bit bootloader. However, when I explicitly forced it to false, the code faulted in the aprint_debug() just below the conditional. In any case, it looked like any access to efi sysbtl faults. After a lot of bisecting, and comparing stable 8 branch (which works) with trunk, I've came to the conclusion that the commit 'Limit the size of the direct map with a 2MB granularity' [2] is actually causing the fault. I haven't been able to revert it on top of current trunk; however, I've been able to verify that with a later size fix included ([3]), the commit preceding it works and this one starts failing. On jak's suggestion, I've obtained memmap for my system (from Linux). Full map is included at the end of the mail; however, the relevant area seems to be: 0xca035000 0xca5d9fff Reserved jak tipped that the fact that systbl resides in 'reserved' area of memory may be the culprit. Could you advise how to solve this or debug it further? TIA. [1]:https://github.com/NetBSD/src/blob/b0e10a0335adcd63e293858cf20d17bcea7bfe2b/sys/arch/x86/x86/efi.c#L350 [2]:https://github.com/NetBSD/src/commit/c813be5ea6a9535bf7242ba0c10e0b1f64f225a9 [3]:https://github.com/NetBSD/src/commit/213657f3c015a98382dc30519d6206d116367f2f Full memmap: 0x0 0x9dfff System RAM 0x9e000 0x9ffff Reserved 0x100000 0x1fffffff System RAM 0x20000000 0x201fffff Reserved 0x20200000 0x40003fff System RAM 0x40004000 0x40004fff Reserved 0x40005000 0xc9713fff System RAM 0xc9714000 0xc9715fff Reserved 0xc9716000 0xc9721fff System RAM 0xc9722000 0xc9725fff Reserved 0xc9726000 0xc972afff System RAM 0xc972b000 0xc9d2bfff ACPI Non-volatile Storage 0xc9d2c000 0xc9d2efff Reserved 0xc9d2f000 0xc9d3efff System RAM 0xc9d3f000 0xc9d42fff Reserved 0xc9d43000 0xc9d43fff System RAM 0xc9d44000 0xc9d49fff Reserved 0xc9d4a000 0xc9ef4fff System RAM 0xc9ef5000 0xc9ef8fff Reserved 0xc9ef9000 0xc9f41fff System RAM 0xc9f42000 0xc9f43fff Reserved 0xc9f44000 0xc9f45fff System RAM 0xc9f46000 0xc9f59fff Reserved 0xc9f5a000 0xc9f5cfff System RAM 0xc9f5d000 0xc9f5efff Reserved 0xc9f5f000 0xc9f75fff System RAM 0xc9f76000 0xc9f7bfff Reserved 0xc9f7c000 0xc9f89fff System RAM 0xc9f8a000 0xc9f8afff Reserved 0xc9f8b000 0xc9f8cfff System RAM 0xc9f8d000 0xc9f8dfff Reserved 0xc9f8e000 0xc9f98fff System RAM 0xc9f99000 0xc9f9dfff Reserved 0xc9f9e000 0xc9fc9fff System RAM 0xc9fca000 0xc9fcafff Reserved 0xc9fcb000 0xc9fdafff System RAM 0xc9fdb000 0xca000fff Reserved 0xca001000 0xca013fff System RAM 0xca014000 0xca014fff Reserved 0xca015000 0xca015fff System RAM 0xca016000 0xca017fff Reserved 0xca018000 0xca018fff System RAM 0xca019000 0xca01dfff Reserved 0xca01e000 0xca034fff System RAM 0xca035000 0xca5d9fff Reserved 0xca5da000 0xca859fff ACPI Non-volatile Storage 0xca85a000 0xca85efff ACPI Tables 0xca85f000 0xca85ffff System RAM 0xca860000 0xca8a2fff ACPI Non-volatile Storage 0xca8a3000 0xcacbafff System RAM 0xcacbb000 0xcaff3fff Reserved 0xcaff4000 0xcaffffff System RAM 0xcbc00000 0xcfdfffff Reserved 0xf8000000 0xfbffffff Reserved 0xfec00000 0xfec00fff Reserved 0xfed00000 0xfed03fff Reserved 0xfed1c000 0xfed1ffff Reserved 0xfee00000 0xfee00fff Reserved 0xff000000 0xffffffff Reserved 0x100000000 0x12f1fffff System RAM -- Best regards, Michał Górny
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