Re: [edk2-devel] [PATCH v2 0/5] Fix OvmfXen HVM Direct kernel boot failure

["Lin, Gary (HPS OE-Linux)" <gary.lin@hpe.com>]

On Fri, Aug 13, 2021 at 09:55:48AM +0000, Yao, Jiewen wrote:
> HI Gary
Hi Jiewen,

> Several comment:
> 
> 1) According to our process, we need a Bugzilla. Would you please file it?
> 
Okay, will create a bugzilla entry to track the issue.

> 2) I do not understand how HVM direct kernel boot is related to S3 enabling.
> It seems 1/3/4/5 are for S3, while 2 is for missing driver.
> Should we split them to 2 patch set?
> 
Actually the inconsistency between QemuFwCfgS3Enabled() and
PcdAcpiS3Enable casued the boot failure of HVM direct kernel boot.
S3SaveStateDxe checked PcdAcpiS3Enable(=FALSE) and skipped S3BootScript.
On the other hand, PlatformBootManagerBeforeConsole() invoked
QemuFwCfgS3Enabled()(=TRUE) and tried to locate S3BootScript. Since
S3BootScript wasn't installed, it failed with EFI_NOT_FOUND and stopped
the booting. So Patch 1 and 2 are mainly for the booting issues in
OvmfXen. For Patch 3~5, I just try to eliminate the inconsistency to
avoid the potential problems.

I can split them into 2 or 3 patch sets if necessary.

> 3) Does the S3 issue only happen in direct kernel boot? Or is it a generic issue.
> 
> 4) Have you validated non direct kernel boot to ensure it still works?
> 
Jim,

Did you encounter any problem with non direct kernel boot VM?


Cheers,

Gary Lin

> 
> > -----Original Message-----
> > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Lin, Gary
> > (HPS OE-Linux)
> > Sent: Friday, August 13, 2021 2:13 PM
> > To: devel@edk2.groups.io
> > Subject: [edk2-devel] [PATCH v2 0/5] Fix OvmfXen HVM Direct kernel boot
> > failure
> > 
> > When using HVM Direct kernel boot with OvmfXen, it could fail at the
> > S3BootScript due to the inconsistency between QemuFwCfgS3Enabled()
> > and PcdAcpiS3Enable. Besides, QemuKernelLoaderFsDxe wasn't included
> > in OvmfXen, so the firmware couldn't fetch kernel/initrd from fw_cfg.
> > 
> > This patch series initializes PcdAcpiS3Enable and adds
> > QemuKernelLoaderFsDxe into OvmfXen. Besides, QemuFwCfgS3Enabled() is
> > replaced with PcdAcpiS3Enable in several OVMF libraries to avoid the
> > potential inconsistency.
> > 
> > v2:
> >   - Amend the description and address "HVM Direct Kernel Boot"
> >   - Add the comment for the conditional test of QemuFwCfgS3Enabled()
> >   - Remove unused QemuFwCfgLib
> >   - Update my email address
> > 
> > Gary Lin (5):
> >   OvmfPkg/OvmfXen: set PcdAcpiS3Enable at initialization
> >   OvmfPkg/OvmfXen: add QemuKernelLoaderFsDxe
> >   OvmfPkg/LockBoxLib: use PcdAcpiS3Enable to detect S3 support
> >   OvmfPkg/PlatformBootManagerLib: use PcdAcpiS3Enable to detect S3
> >     support
> >   OvmfPkg/SmmControl2Dxe: use PcdAcpiS3Enable to detect S3 support
> > 
> >  OvmfPkg/OvmfXen.dsc                                 |  1 +
> >  OvmfPkg/OvmfXen.fdf                                 |  1 +
> >  OvmfPkg/Library/LockBoxLib/LockBoxDxeLib.inf        |  3 +--
> >  .../PlatformBootManagerLib.inf                      |  1 +
> >  OvmfPkg/SmmControl2Dxe/SmmControl2Dxe.inf           |  2 ++
> >  OvmfPkg/XenPlatformPei/XenPlatformPei.inf           |  2 ++
> >  OvmfPkg/Library/LockBoxLib/LockBoxDxe.c             |  4 +---
> >  .../Library/PlatformBootManagerLib/BdsPlatform.c    |  2 +-
> >  OvmfPkg/SmmControl2Dxe/SmmControl2Dxe.c             |  4 +---
> >  OvmfPkg/XenPlatformPei/Platform.c                   | 13 +++++++++++++
> >  10 files changed, 24 insertions(+), 9 deletions(-)
> > 
> > --
> > 2.31.1
> > 
> > 
> > 
> > 
> > 
>