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Date: Tue, 4 Apr 2017 11:50:24 -0700 (PDT)
From: Shivappa Vikas <vikas.shivappa@...el.com>
To: Tracy Smith <tlsmith3777@...il.com>
cc: x86@...nel.org, vikas.shivappa@...el.com,
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
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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