On 05/27/17 at 01:14pm, Dave Young wrote: > Seems efi list was dropped, it if is intended not to cc public list > please let me know. > > On 05/26/17 at 03:04pm, Maniaxx wrote: > > On 26.05.2017 at 03:23 wrote Dave Young: > > > Hello, > > > > > > On 05/26/17 at 12:49am, Maniaxx wrote: > > >> PROBLEM: Kernel panic on EFI BGRT early init code (kernel 4.11/4.12rc2) > > >> [regression] > > >> > > >> Commit: > > >> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7b0a911478c74ca02581d496f732c10e811e894f > > >> > > >> Kernel 4.10 and below are ok. 4.11 and 4.12rc2.r62.g2426125ab4eb freeze. > > >> Reverting the commit on 4.11 fixes the problem. Hardware report and > > >> earlyprintk output on the bugtracker. > > >> https://bugzilla.kernel.org/show_bug.cgi?id=195633 > > >> > > >> earlyprintk (text version): > > >> https://bbs.archlinux.org/viewtopic.php?pid=1713322#p1713322 > > >> > > >> Discussions on Arch Linux Forum: > > >> https://bbs.archlinux.org/viewtopic.php?pid=1713344 > > >> https://bbs.archlinux.org/viewtopic.php?id=226490 > > >> > > > Can you try below patch see if it works for you? > > > https://lkml.org/lkml/2017/5/15/940 > > > > > > Thanks > > > Dave > > > > > Hello, > > doesn't work. Probably because the condition isn't met (i do have an EFI > > system). At least 4 people reported the problem and if i see it right > > all of them have Asus/Asrock boards. The BGRT init (at least on my side) > > always crashed with an Oops (on 4.10 and below) but never panic'd/froze. > > Can you double check it works before the commit of below? If machine > boots fine then check /sys/firmware/acpi/bgrt/image see if it exists or > not. One possible reason is bgrt init code bail out for some reason but > not in new code. > > If old code boots fine but without correct /sys/firmware/acpi/bgrt/* > then probably you can debug why it is not created then we can get some > clue about this report. Also it would be better to print the bgrt table like below (copied from Sabrina Dubroca's test code in another mail thread): pr_info("%s acpi_table_bgrt.version %hu\n", __func__, bgrt->version); pr_info("%s acpi_table_bgrt.status %hhu\n", __func__, bgrt->status); pr_info("%s acpi_table_bgrt.image_type %hhu\n", __func__, bgrt->image_type); pr_info("%s acpi_table_bgrt.image_address %llx\n", __func__, bgrt->image_address); print_hex_dump(KERN_INFO, "efi_bgrt_init acpi_table_bgrt", DUMP_PREFIX_OFFSET, 16, 1, bgrt, sizeof(*bgrt), false); > > BTW if you can manange to save full kernel log it would be also helpful. > > commit 7b0a911478c74ca02581d496f732c10e811e894f > Author: Dave Young <dyoung@xxxxxxxxxx> > Date: Tue Jan 31 13:21:40 2017 +0000 > > efi/x86: Move the EFI BGRT init code to early init code > > > > > -Maniaxx > > > > Thanks > Dave -- 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
