On Wed, Jul 09, 2025 at 08:55:48AM +0000, Duan, Zhenzhong wrote:
> 
> 
> >-----Original Message-----
> >From: Daniel P. Berrangé <berra...@redhat.com>
> >Subject: Re: [PATCH v3 00/21] LIBVIRT: X86: TDX support
> >
> >On Mon, Jun 30, 2025 at 02:17:11PM +0800, Zhenzhong Duan wrote:
> >> Hi,
> >>
> >> This series brings libvirt the x86 TDX support.
> >>
> >> * What's TDX?
> >> TDX stands for Trust Domain Extensions which isolates VMs from
> >> the virtual-machine manager (VMM)/hypervisor and any other software on
> >> the platform.
> >>
> >> This patchset extends libvirt to support TDX, with which one can start a 
> >> TDX
> >> guest from high level rather than running qemu directly.
> >>
> >> * Misc
> >> As QEMU use a software emulated way to reset guest which isn't supported
> >by TDX
> >> guest for security reason. We simulate reboot for TDX guest by kill and
> >create a
> >> new one in FakeReboot framework.
> >>
> >> Complete code can be found at [1].
> >>
> >> * Test
> >> Tested with upstream qemu v10.0.0-1724-gf9a3def17b
> >> shutdown/reboot/reset with virsh
> >> shutdown/reboot trigger in guest
> >> shutdown with on_poweroff=destroy/restart
> >> reboot with on_reboot=destroy/restart
> >
> >FYI when I have a guest crash libvirt logs
> >
> >  error : qemuMonitorJSONGuestPanicExtractInfo:638 : internal error:
> >unknown panic info type 'tdx'
> >
> >this is a new type of panic data structure from upstream QEMU
> >that libvirt needs to handle in some way
> 
> Oh yes, thanks, will add processing on libvirt side.

I think it'll be useful to get the crash "message" string into the
per-VM logfile at /var/log/libvirt/qemu/$GUEST.log

I wasted alot of time trying to understand why my guest was panicking
until realizing I had mistakenly enabled SEPT #VE. The 'message' string
in the panic event would have told me that immediately, but it was not
visible, so I think its important to expose this msg in the logs out of
the box.

With regards,
Daniel
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