[PATCH v2 03/11] OvmfPkg: PlatformBootManagerLibGrub: Allow executing kernel via fw_cfg

["Dov Murik" <dovmurik@linux.ibm.com>]

From: James Bottomley <jejb@linux.ibm.com>

Support QEMU's -kernel option.

OvmfPkg/Library/PlatformBootManagerLibGrub/QemuKernel.c is an exact copy
of OvmfPkg/Library/PlatformBootManagerLib/QemuKernel.c .

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ashish Kalra <ashish.kalra@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Min Xu <min.m.xu@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3457
Signed-off-by: James Bottomley <jejb@linux.ibm.com>
---
 OvmfPkg/AmdSev/AmdSevX64.dsc                                                        |  1 +
 OvmfPkg/Library/PlatformBootManagerLibGrub/PlatformBootManagerLibGrub.inf           |  2 ++
 OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.h                            | 11 +++++++++++
 OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.c                            |  5 +++++
 OvmfPkg/Library/{PlatformBootManagerLib => PlatformBootManagerLibGrub}/QemuKernel.c |  0
 5 files changed, 19 insertions(+)

diff --git a/OvmfPkg/AmdSev/AmdSevX64.dsc b/OvmfPkg/AmdSev/AmdSevX64.dsc
index a2f1324c40a6..aefdcf881c99 100644
--- a/OvmfPkg/AmdSev/AmdSevX64.dsc
+++ b/OvmfPkg/AmdSev/AmdSevX64.dsc
@@ -281,6 +281,7 @@ [LibraryClasses.common.PEIM]
   CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf
   MpInitLib|UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf
   QemuFwCfgS3Lib|OvmfPkg/Library/QemuFwCfgS3Lib/PeiQemuFwCfgS3LibFwCfg.inf
+  QemuLoadImageLib|OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.inf
   PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
   QemuFwCfgLib|OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgPeiLib.inf
 
diff --git a/OvmfPkg/Library/PlatformBootManagerLibGrub/PlatformBootManagerLibGrub.inf b/OvmfPkg/Library/PlatformBootManagerLibGrub/PlatformBootManagerLibGrub.inf
index 9a806d17ec45..5f6f73d18470 100644
--- a/OvmfPkg/Library/PlatformBootManagerLibGrub/PlatformBootManagerLibGrub.inf
+++ b/OvmfPkg/Library/PlatformBootManagerLibGrub/PlatformBootManagerLibGrub.inf
@@ -23,6 +23,7 @@ [Defines]
 
 [Sources]
   BdsPlatform.c
+  QemuKernel.c
   PlatformData.c
   BdsPlatform.h
 
@@ -46,6 +47,7 @@ [LibraryClasses]
   BootLogoLib
   DevicePathLib
   PciLib
+  QemuLoadImageLib
   UefiLib
   PlatformBmPrintScLib
   Tcg2PhysicalPresenceLib
diff --git a/OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.h b/OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.h
index 748c63081920..f1d3a2906c00 100644
--- a/OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.h
+++ b/OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.h
@@ -172,4 +172,15 @@ PlatformInitializeConsole (
   IN PLATFORM_CONSOLE_CONNECT_ENTRY   *PlatformConsole
   );
 
+/**
+  Loads and boots UEFI Linux via the FwCfg interface.
+
+  @retval    EFI_NOT_FOUND - The Linux kernel was not found
+
+**/
+EFI_STATUS
+TryRunningQemuKernel (
+  VOID
+  );
+
 #endif // _PLATFORM_SPECIFIC_BDS_PLATFORM_H_
diff --git a/OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.c b/OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.c
index 5c92d4fc2b09..7cceeea4879c 100644
--- a/OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.c
+++ b/OvmfPkg/Library/PlatformBootManagerLibGrub/BdsPlatform.c
@@ -1315,6 +1315,11 @@ PlatformBootManagerAfterConsole (
   //
   Tcg2PhysicalPresenceLibProcessRequest (NULL);
 
+  //
+  // Process QEMU's -kernel command line option
+  //
+  TryRunningQemuKernel ();
+
   //
   // Perform some platform specific connect sequence
   //
diff --git a/OvmfPkg/Library/PlatformBootManagerLib/QemuKernel.c b/OvmfPkg/Library/PlatformBootManagerLibGrub/QemuKernel.c
similarity index 100%
copy from OvmfPkg/Library/PlatformBootManagerLib/QemuKernel.c
copy to OvmfPkg/Library/PlatformBootManagerLibGrub/QemuKernel.c
-- 
2.25.1