Re: [edk2-devel] [PATCH] .azurepipelines: Enable CI for OvmfPkg and EmulatorPkg

["Michael D Kinney" <michael.d.kinney@intel.com>]

Hi Laszlo,

I think using the QEMU feature to map a path from the host as 
a FAT formatted driver has value to provision QEMU with a set
of target tests to run.  I agree there is no persistent storage
of writes to this type of drive.  I believe writes are supported
if file state is needed during the single boot of QEMU.

In order to get test results out of QEMU back to the host,
I was considering the use of consoles mapped as named pipes
and send all test results out the console device and the
host can parse the logs.

I have not had good experiences trying to build virtual
disks, provision them, map them into QEMU, and remount
from host to collect test results.  Slow operations and
cumbersome to mount/unmount from the host (at least from
Windows environments).

Mike

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On
> Behalf Of Laszlo Ersek
> Sent: Monday, March 30, 2020 2:11 PM
> To: devel@edk2.groups.io; ard.biesheuvel@linaro.org; Sean
> Brogan <sean.brogan@microsoft.com>
> Subject: Re: [edk2-devel] [PATCH] .azurepipelines: Enable
> CI for OvmfPkg and EmulatorPkg
> 
> On 03/30/20 08:07, Ard Biesheuvel wrote:
> > On Mon, 30 Mar 2020 at 01:16, Sean via Groups.Io
> > <sean.brogan=microsoft.com@groups.io> wrote:
> >>
> >> Ard/Laszlo or anyone familiar with QEMU.
> >>
> >> I read up on the ovmf readme and the qemu wiki but
> still have a few issues i am hoping for quick/easy
> answers.
> >>
> >> 1. How do i programmatically exit the emulator.
> Seems like uefi shell > reset just reboots.  Other ideas?
> >
> > 'reset' is supposed to do that. Use 'reset -s' to kill
> the VM
> >
> >> 2. Is there an easy way to map a local file system so
> that i can setup a startup.nsh?
> >>
> >
> > As Andrew points out, use '-hda fat:<path>' and it will
> be exposed to
> > the VM as a FAT formatted block device.
> 
> Note that it will not offer (functional, or any) write
> support.
> 
> I prefer "mtools" or "guestfish" for formatting and
> populating a virtual
> disk image.
> 
> None of those are easy ways, admittedly -- I'm not
> offering some
> examples right now exactly because I have to sit down and
> think about
> them every time I need them. :) If there's interest in
> such commands, I
> could hack up something, but then please give me some
> specs, and I'll
> have to work on these things in the morning (while my
> brain is still not
> mush).
> 
> Thanks
> Laszlo
> 
> 
>