Re: [Xen-devel] Likely regression in efi=no-rs option

[Rich Persaud <persaur@xxxxxxxxx>]

On Nov 19, 2019, at 02:13, Roman Shaposhnik <roman@xxxxxxxxxx> wrote:
> 
> Ok, to sum up -- there's definitely a pretty major regression on all
> this hardware with Xen 4.13 RC2:
>   
> https://www.dell.com/en-us/work/shop/gateways-embedded-computing/sc/gateways-embedded-pcs/edge-gateway?~ck=bt
> 
> Without efi=no-rs option Xen panics on boot (sorry for attaching the
> screenshot -- I know it is not super helpful but it gets the point
> across)

I don't think the screenshot came through..

By "without efi=no-rs" do you mean "efi=rs" or no explicit value for efi on the 
Xen command line?

> With efi=no-rs Xen boots fine, but Dom0 can't come up.

Is that with RC2, or RC2 + the recent patch from Marek for efi=no-rs?  Any 
serial logs from dom0 boot?  Can you share the dom0 kernel command line with 
all options?

Thanks,
Rich

> And, once again, this is clearly a regression from RC1 (just verified).
> 
> Thanks,
> Roman.
> 
>>>> On Sat, Nov 16, 2019 at 12:47 PM Rich Persaud <persaur@xxxxxxxxx> wrote:
>> I don't know if there's a change in efi=no-rs behavior, but some EFI fixes 
>> were merged on 10/25, which (on some machines) have reduced the need to 
>> disable UEFI runtime services to work around non-spec UEFI firmware.  This 
>> should increase hardware compatibility with Xen.  Of course, there could 
>> still be other reasons to disable UEFI runtime services.
>> Could you try booting the affected systems with efi=rs?
>> Rich
>>>> On Nov 16, 2019, at 00:27, Roman Shaposhnik <roman@xxxxxxxxxx> wrote:
>>> Hi!
>>> as I've reported earlier -- part of my testing of Xen 4.13 RC2 failed
>>> in a massive way with Dom0 never coming up. I've traced that problem
>>> to the option that we're using to boot Xen:
>>> efi=no-rs
>>> We've been using this option for quite sometime and Xen 4.13 RC2
>>> is the first one that seems to make Dom0 boot fail with this option
>>> present (note that RC1 was fine).
>>> I was wondering whether there were any changes in the areas related
>>> to UEFI in Xen that may have triggered this.
>>> Here's the boot line that works with RC2:
>>> dom0_mem=1024M,max:1024M dom0_max_vcpus=1 dom0_vcpus_pin smt=false
>>> adding efi=no-rs make Dom0 boot process fail:
>>> efi=no-rs dom0_mem=1024M,max:1024M dom0_max_vcpus=1 dom0_vcpus_pin smt=false
>>> Attaching xl info and dmesg just in case
>>> Thanks,
>>> Roman.
>>> <dmesg.txt>
>>> <info.txt>
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@xxxxxxxxxxxxxxxxxxxx
>>> https://lists.xenproject.org/mailman/listinfo/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel