On Fri, 20 Sep, at 11:05:44AM, Borislav Petkov wrote: > On Fri, Sep 20, 2013 at 03:29:04PM +0800, Dave Young wrote: > > Just tested this series, for 1st kernel It boots ok in qemu+ovmf. But > > it immediately reboot on my Thinkpad T420. Unfortunately there's no > > way to debug this very early problem because there's no serial port > > also earlyprintk does not work for efi boot. No usb debug as well on > > this machine. I will test it when I go back to work after the china > > holiday. > > Hmm, I'm booting with the efi boot stub, how do you do it? Dave, could you try this patch? --- diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 06e71c2..9bcc15c 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -207,6 +207,8 @@ ENTRY(startup_64) jmp preferred_addr ENTRY(efi_pe_entry) + movq %cr3, %r15 + movq %r15, efi_scratch+16(%rip) mov %rcx, %rdi mov %rdx, %rsi pushq %rdi @@ -219,6 +221,8 @@ ENTRY(efi_pe_entry) popq %rdi ENTRY(efi_stub_entry) + movq %cr3, %r15 + movq %r15, efi_scratch+16(%rip) call efi_main movq %rax,%rsi cmpq $0,%rax -- Matt Fleming, Intel Open Source Technology Center -- 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
