linux-kernel - Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot

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Message-ID: <20190211100800.GA19041@zn.tnic>
Date:   Mon, 11 Feb 2019 11:08:00 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Chao Fan <fanc.fnst@...fujitsu.com>
Cc:     Guenter Roeck <linux@...ck-us.net>, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, kirill.shutemov@...ux.intel.com,
        mingo@...hat.com, thomas.lendacky@....com,
        yamada.masahiro@...ionext.com, caoj.fnst@...fujitsu.com,
        jgross@...e.com, mingo@...nel.org, keescook@...omium.org,
        x86@...nel.org, hpa@...or.com, linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in
 boot_params

On Mon, Feb 11, 2019 at 05:30:33PM +0800, Chao Fan wrote:
> Yes, I download your ovmf file in linux-build-test/rootfs/firmware/ from
> your link. There are two files, efi32 and efi64. Then I try to run:

You need both OVMF-pure-efi-32.fd and rootfs.squashfs from the repo. And
then this works here. Just put the script below and the two files in a
directory and point to the kernel where you're building with -kernel.

---
#!/bin/bash

qemu-system-x86_64 -kernel ~/kernel/linux/arch/x86/boot/bzImage -M q35 -cpu SandyBridge \
        -no-reboot -snapshot -smp 1 \
        -gdb tcp::1235 \
        -bios OVMF-pure-efi-32.fd \
        -m 1G \
        -net nic,model=rtl8139,macaddr=12:34:56:78:12:34 \
        -usb -device usb-storage,drive=d0 \
        -drive file=rootfs.squashfs,if=none,id=d0,format=raw \
        --append 'earlycon=uart8250,io,0x3f8,9600n8 root=/dev/sda rootwait panic=-1 earlyprintk=ttyS0,115200,keep console=ttyS0,115200' \
        -monitor pty \
        -serial file:log

I've added some options for debugging.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)