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Date:   Tue, 4 Apr 2017 14:02:24 -0500
From:   Tracy Smith <tlsmith3777@...il.com>
To:     Shivappa Vikas <vikas.shivappa@...el.com>
Cc:     x86@...nel.org, lkml <linux-kernel@...r.kernel.org>,
        ravi.v.shankar@...el.com, tony.luck@...el.com,
        fenghua.yu@...el.com, h.peter.anvin@...el.com,
        Vikas Shivappa <vikas.shivappa@...ux.intel.com>
Subject: Re: [PATCH 4/8] x86/intel_rct/mba: Add MBA structures and initialize MBA

Apologies, unrelated to MBA. Resent later with a changed subject line.

On Tue, Apr 4, 2017 at 1:50 PM, Shivappa Vikas <vikas.shivappa@...el.com> wrote:
>
>
>
> On Mon, 3 Apr 2017, Tracy Smith wrote:
>
>> Hi All,
>>
>> No JTAG available and need to understand why Linux 4.8.3 doesn't boot on a
>> x86_64 corei7-64.  Hangs at the typical "Starting kernel" location after
>> the last message of the U-boot.  The bootcmd is given below.
>
>
> Do you see the issue when you apply MBA patches . It seems like you use 4.8
> kernel but the mba patches are dependent on :
> https://marc.info/?l=linux-kernel&m=149125583824700
>
> which is applied on 4.11-rc4.
>
>
>>
>> See a fault FFS and a message indicating the image didn't load after
>> failover.
>>
>> 1) How can I verify if the kernel image was loaded from uboot
>> 2) What is this fault?
>> 3) Has the bootargs or bootcmd changed between 4.1 and 4.8.3?
>> 4) If the boot cmd/arg has changed, what should the boot cmd/arg be for
>> 4.8.3 to boot on x86_64 corei7-64?
>>
>> Initial RAM disk at linear address 0x20000000, size 11638378 bytes
>> Kernel command line: "BOOT_IMAGE=/imgx/bzImage LABEL=BOOT root=/dev/ram0
>> imgmnt=/media/sda2 imgdir=imgx img=image.rootfs rootdelay=2 slub_debug=F
>> console=ttyS1,115200  bootcount=1 bootcount_addr=0xa4000
>> acpi_enforce_resources=lax pram_size=0x800000 pram_addr=10000000
>> pram_loc=ddr crashkernel=128M memmap=0x800000$0x10000000  "
>> EFI table at 683392c0, mmap 68339300, mmap size 4c0, version 1, descr.
>> size
>> 0x30
>>
>> Starting kernel ...
>>
>> Timer summary in microseconds:
>>       Mark    Elapsed  Stage
>>          0          0  reset
>>          1          1  board_init_r
>>        105        104  board_init_f
>> 10,180,048 10,179,943  id=64
>> 10,221,985     41,937  id=65
>> 10,356,645    134,660  main_loop
>> 12,366,521  2,009,876  usb_start
>> 18,747,284  6,380,763  start_kernel
>> Accumulated time:
>>            10,162,689  ahci
>>
>> On a 4.1.26-yocto-standard #1 SMP it boots with no issues.  Basically same
>> .config used in both cases except for anything deprecated between 4.1 and
>> 4.8.3.
>>
>> root@:~# cat /proc/cmdline
>> BOOT_IMAGE=/imgy/bzImage LABEL=BOOT root=/dev/ram0 imgmnt=/media/sda2
>> imgdir=imgy img=image.rootfs rootdelay=2 slub_debug=F console=ttyS1,115200
>> fault=FFS bootcount=3 bootcount_addr=0xa4000  acpi_enforce_resources=lax
>> pram_size=0x800000 pram_addr=10000000 pram_loc=ddr crashkernel=128M
>> memmap=0x800000$0x10000000
>> root@...3001:~# cat /proc/consoles
>> ttyS1                -W- (EC p a)    4:65
>> netcon0              -W- (E     )
>>
>> thx,
>> Tray
>>
>



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