Messages in this thread Patch in this message | | | Date | Mon, 18 Jan 2016 15:40:01 +0000 | From | Matt Fleming <> | Subject | Re: v4.4-rc8 based tip tree kernel hangs on boot. |
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On Sun, 17 Jan, at 11:02:48PM, Srikar Dronamraju wrote: > > Unfortunately even with your below patch on top of c9f2a9a ("x86/efi: > Hoist page table switching code into efi_call_virt()" also fails to boot > with and without CONFIG_DEBUG_WX=y. I have added CONFIG_EFI_PGT_DUMP.
What about if you comment out the call to efi_dump_pagetable()? What if you return early from efi_sync_low_kernel_mappings(), e.g.
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index 71121a9d06cf..e1f8ebb88f84 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -177,6 +177,8 @@ void efi_sync_low_kernel_mappings(void) init_mm.pgd + pgd_index(PAGE_OFFSET), sizeof(pgd_t) * num_pgds); + return; + /* * We can share all PGD entries apart from the one entry that * covers the EFI runtime mapping space. Do either of those modifications make your kernel boot when you apply the patch I sent on Friday? If so, which one? I'm struggling to find hardware that's similar enough to reproduce this.
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