On Sat, Jul 04, 2020 at 11:09:54AM +0000, Michael Baehr wrote: > Kastus Shchuka <[email protected]> wrote: > “I installed 2020-07-03 snapshot on ASRock J4105M system and I am not able to > boot it. > Boot stops at the line > > entry point at 0x1001000 > > If I try bsd.rd kernel, it boots just fine. After this failure with snapshot > I > installed 6.7-release, and it boots without any issues.” > > > I've experienced something similar, including the sensitivity to kernel size. > As best I can observe, the EFI bootloader is being handed a different block > of RAM than where the kernel is actually loaded (which is at a fixed address > defined in boot.c). Which block of memory gets returned, and whether boot > fails, seems to be dependent on the particular UEFI ROM/chipset. In my case, > debugging over serial, I observe a page fault while the kernel is still being > loaded into RAM. > “Are there any other solutions than compiling a custom smaller kernel?” > > > Patching efiboot.c as follows and recompiling bootia32/bootx64 resolved it > for me: > --- a/sys/arch/amd64/stand/efiboot/efiboot.c > +++ b/sys/arch/amd64/stand/efiboot/efiboot.c > @@ -303,9 +303,9 @@ efi_memprobe(void) > bios_memmap_t *bm; > EFI_STATUS status; > EFI_PHYSICAL_ADDRESS > - addr = 0x10000000ULL; /* Below 256MB */ > + addr = 0x1000000; > > - status = EFI_CALL(BS->AllocatePages, AllocateMaxAddress, > EfiLoaderData, > + status = EFI_CALL(BS->AllocatePages, AllocateAddress, EfiLoaderData, > EFI_SIZE_TO_PAGES(KERN_LOADSPACE_SIZE), &addr); > if (status != EFI_SUCCESS) > panic("BS->AllocatePages()"); > Let me know if that helps. I can't guarantee that this is actually what is > causing your issue but it worked for me.
I tried this patch and was able to boot kernel from snapshot 2007-07-03 with recompiled BOOTX64.EFI. It fixes the problem with EFI memory mapping on ASRock J4105M motherboard. I wonder what would it take for the patch to be accepted in -current? Thanks, Kastus
