Reviewed-by: Jordan Justen <[email protected]>

Did Michael get a chance to test these?

-Jordan

On Mon, Feb 24, 2014 at 9:30 AM, Laszlo Ersek <[email protected]> wrote:
> The first patch cleans up a confusing / outdated comment in
> BdsPlatform.c, and removes remnants of an old boot mode hack that has
> been irrelevant for OVMF for a while.
>
> The second patch makes sure that QemuBootOrder doesn't only drop
> references to Boot#### variables in BootOrder, but it also releases the
> unreferenced (leaked, unreachable) variables themselves.
>
> Testing:
> (a) Booted a Fedora guest with a pre-patch OVMF build three consecutive
> times. Listed the files under "/sys/firmware/efi/efivars/". Compared
> the set of boot variables. Results:
>
>   --- no-patch-1.txt      2014-02-24 17:38:18.150337706 +0100
>   +++ no-patch-2.txt      2014-02-24 17:39:01.559729815 +0100
>   @@ -287,6 +287,9 @@
>    Boot011D-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    Boot011E-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    Boot011F-8be4df61-93ca-11d2-aa0d-00e098032b8c
>   +Boot0120-8be4df61-93ca-11d2-aa0d-00e098032b8c
>   +Boot0121-8be4df61-93ca-11d2-aa0d-00e098032b8c
>   +Boot0122-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    BootCurrent-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    BootOptionSupport-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    BootOrder-8be4df61-93ca-11d2-aa0d-00e098032b8c
>
> and
>
>   --- no-patch-2.txt      2014-02-24 17:39:01.559729815 +0100
>   +++ no-patch-3.txt      2014-02-24 17:40:12.290521928 +0100
>   @@ -290,6 +290,9 @@
>    Boot0120-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    Boot0121-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    Boot0122-8be4df61-93ca-11d2-aa0d-00e098032b8c
>   +Boot0123-8be4df61-93ca-11d2-aa0d-00e098032b8c
>   +Boot0124-8be4df61-93ca-11d2-aa0d-00e098032b8c
>   +Boot0125-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    BootCurrent-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    BootOptionSupport-8be4df61-93ca-11d2-aa0d-00e098032b8c
>    BootOrder-8be4df61-93ca-11d2-aa0d-00e098032b8c
>
> (b) Rebuilt OVMF with the patchset and repeated the test in (a) -- three
> further runs. The set of boot variables stagnated, relative to the last
> output under step (a). (Leak had been plugged.)
>
> (c) Regression testing:
>
> - Removed the PXE boot option I used to have in the 2nd position for the
>   guest, and booted the guest. The option was dropped.
>
> - Then I shut down the VM, re-added the PXE boot option in the 1st
>   position, and rebooted. The MAC devpath was automatically
>   re-enumerated, and the qemu-specific code moved it to the 1st
>   position. Booted the UEFI shell from local libvirt network.
>
> - Then I shut down the VM, reordered the HD and PXE boot options in
>   virt-manager, and booted again from the HD. The PXE boot option moved
>   to 2nd place.
>
> Please test and/or review.
> Thanks!
> Laszlo
>
> Laszlo Ersek (2):
>   OvmfPkg: BDS: remove historic (now defunct) boot mode hack
>   OvmfPkg: BDS: QemuBootOrder: don't leak unreferenced boot options
>
>  OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c   | 20 ++--------
>  OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c | 54 
> +++++++++++++++++++++++---
>  2 files changed, 51 insertions(+), 23 deletions(-)
>
> --
> 1.8.3.1
>
>
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