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

["John L. Poole" <jlpoole56@xxxxxxxxx>]

On 3/26/2019 1:04 AM, Jan Beulich wrote:

On 25.03.19 at 18:00, <jlpoole56@xxxxxxxxx> 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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