[edk2-devel] [PATCH 1/1] OvmfPkg PlatformBootManagerLib: Move TryRunningQemuKernel()
Christoph Willing
chris.willing at linux.com
Mon Aug 9 12:53:44 UTC 2021
With soft feature freeze started, I wonder if this patch could be
reviewed and pushed for edk2-stable202108 tag? I think it has languished
because I didn't initially Cc appropriately - pls add others as necessary.
This patch is a trivial (I think) change which fixes a long standing and
annoying bug for those booting Qemu with UEFI using external kernel &
initrd.
Thanks,
chris
On 28/7/21 12:02 pm, Christoph Willing wrote:
> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3504
>
> This change ensures that PlatformBdsConnectSequence() is run
> before TryRunningQemuKernel().
>
> It reverses commit a34a886962561f6d8550b2a1bb193798ca456431 which aimed
> to improve UEFI boot time. Unfortunately that commit now results in boot
> failure when using qemu's -kernel option, therefore rendering the -initrd
> & -append options useless.
>
> Such failures are seen in all releases from edk2-stable201808 to
> edk2-stable202105 as well as the master branch.
>
> The last releases which actually work correctly are vUDK2017 and vUDK2018
> as they don't contain the a34a88 commit.
>
> This change has been tested with edk2-stable201808, edk2-stable201811,
> edk2-stable202105 as well as master (at 21/7/2021). It results in correct
> booting using the -kernel option in all the test cases. No measurable
> change in boot times was discernible compared with the unaffected vUDK2017
> & vUDK2018 releases.
>
> Signed-off-by: Christoph Willing <chris.willing at linux.com>
> ---
> OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
> index b0e9742937..f08ace87b3 100644
> --- a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
> +++ b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
> @@ -1517,14 +1517,14 @@ PlatformBootManagerAfterConsole (
> Tcg2PhysicalPresenceLibProcessRequest (NULL);
>
> //
> - // Process QEMU's -kernel command line option
> + // Perform some platform specific connect sequence
> //
> - TryRunningQemuKernel ();
> + PlatformBdsConnectSequence ();
>
> //
> - // Perform some platform specific connect sequence
> + // Process QEMU's -kernel command line option
> //
> - PlatformBdsConnectSequence ();
> + TryRunningQemuKernel ();
>
> EfiBootManagerRefreshAllBootOption ();
>
>
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