Re: Xen 4.12.0-rc Hangs Around masked ExtINT on CPU#

From: "John L. Poole" <jlpoole56@gmail.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: xen-devel@lists.xen.org
Subject: Re: Xen 4.12.0-rc Hangs Around masked ExtINT on CPU#
Date: Tue, 26 Mar 2019 10:21:06 -0700	[thread overview]
Message-ID: <25b66cdf-94ad-6af1-de5f-e0f5369ae000@gmail.com> (raw)
In-Reply-To: <5C99DD160200007800221D00@prv1-mh.provo.novell.com>

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On 3/26/2019 1:04 AM, Jan Beulich wrote:
>>>> On 25.03.19 at 18:00, <jlpoole56@gmail.com> wrote:
>> I removed the "maxcpus=1" and attempted seven (7) boots.
>> There were minor variations, they do not seem to get
>> past the first additional processor.  Below is a summary.
> And with "maxcpus=1" in place, is it as stable hanging when trying
> to bring up the 3rd AP? I find it rather surprising that, with you
> already having sync_console on the command line, there's such a
> variation. I wonder whether SMM is somehow getting in the way.
>
> The main difference to bare metal Linux is that we enable VMX
> while they don't (afaict). Since for whatever reason we don't
> (yet) have a command line option to suppress this, could you
> re-build Xen with CONFIG_HVM turned off in xen/.config?
>
> Jan
>
>
# rem'd out CONFIG_HVM=y
make clean
make

7:46 AM 3/26/2019 build of xen w/o HVM
prompted with:
HVM support (HVM) [Y/n/?]
replied: n

cp /boot/efi/gentoo/man_xen.efi /boot/efi/gentoo/man_xen.efi_HVM_yes
cp /usr/local/src/xen/dist/install/usr/lib64/efi/xen-4.13-unstable.efi 
/boot/efi/gentoo/man_xen.efi

cp /boot/efi/gentoo/xen-4.13-unstable.gz 
/boot/efi/gentoo/xen-4.13-unstable.gz_HVM_yes
cp /usr/local/src/xen/dist/install/boot/xen-4.13-unstable.gz 
/boot/efi/gentoo/xen-4.13-unstable.gz

zeta /usr/local/src/xen # cat xen/.config |grep CONFIG_HVM
# CONFIG_HVM is not set
zeta /usr/local/src/xen #

# tried 2 boot attempts
log at: https://pastebin.com/nL4BWJ6Y

Hang points at lines:
298:
(XEN) [2019-03-26 17:14:01] Setting warm reset code and vector.
(XEN) [2019-03-26 17:14:01] 1.
(XEN) [2019-03-26 17:14:01] 2.
(XEN) [2019-03-26 17:14:01] 3.
(XEN) [2019-03-26 17:14:01] Asserting INIT.
(XEN) [2019-03-26 17:14:01] Waiting for send to finish...

599:
(XEN) [2019-03-26 17:16:30] Setting warm reset code and vector.
(XEN) [2019-03-26 17:16:30] 1.
(XEN) [2019-03-26 17:16:30] 2.
(XEN) [2019-03-26 17:16:30] 3.
(XEN) [2019-03-26 17:16:30] Asserting INIT.
(XEN) [2019-03-26 17:16:30] Waiting for send to finish...

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