From c36a16dad384129382088ef783d8e672ead2752a Mon Sep 17 00:00:00 2001

From: Laszlo Ersek <lersek@redhat.com>

Date: Wed, 24 Jun 2020 11:31:36 +0200

Subject: [PATCH 18/21] OvmfPkg/QemuKernelLoaderFsDxe: suppress error on no

 "-kernel" in silent aa64 build (RH)

Notes about the RHEL-8.3/20200603-ca407c7246bf [edk2-stable202005] ->

RHEL-8.5/20210520-e1999b264f1f [edk2-stable202105] rebase:

- Remove obsolete commit message tags related to downstream patch

  management: Message-id, Patchwork-id, O-Subject, Acked-by, From,

  RH-Acked-by, RH-Author (RHBZ#1846481).

Bugzilla: 1844682

If the "-kernel" QEMU option is not used, then QemuKernelLoaderFsDxe

should return EFI_NOT_FOUND, so that the DXE Core can unload it. However,

the associated error message, logged by the DXE Core to the serial

console, is not desired in the silent edk2-aarch64 build, given that the

absence of "-kernel" is nothing out of the ordinary. Therefore, return

success and stay resident. The wasted guest RAM still gets freed after

ExitBootServices().

(Inspired by RHEL-8.1.0 commit aaaedc1e2cfd.)

Signed-off-by: Laszlo Ersek <lersek@redhat.com>

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>

(cherry picked from commit 9adcdf493ebbd11efb74e2905ab5f6c8996e096d)

---

 .../QemuKernelLoaderFsDxe.inf                  |  1 +

 .../QemuKernelLoaderFsDxe.c                    | 18 ++++++++++++++++++

 2 files changed, 19 insertions(+)

diff --git a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.inf b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.inf

index 7b35adb8e034..e0331c6e2cbc 100644

--- a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.inf

+++ b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.inf

@@ -28,6 +28,7 @@ [LibraryClasses]

   BaseLib

   BaseMemoryLib

   DebugLib

+  DebugPrintErrorLevelLib

   DevicePathLib

   MemoryAllocationLib

   QemuFwCfgLib

diff --git a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c

index d4f3cd92255f..f007f8a6c233 100644

--- a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c

+++ b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c

@@ -19,6 +19,7 @@

 #include <Library/BaseMemoryLib.h>

 #include <Library/BlobVerifierLib.h>

 #include <Library/DebugLib.h>

+#include <Library/DebugPrintErrorLevelLib.h>

 #include <Library/DevicePathLib.h>

 #include <Library/MemoryAllocationLib.h>

 #include <Library/QemuFwCfgLib.h>

@@ -1081,6 +1082,23 @@ QemuKernelLoaderFsDxeEntrypoint (

   if (KernelBlob->Data == NULL) {

     Status = EFI_NOT_FOUND;

+ #if defined (MDE_CPU_AARCH64)

+    //

+    // RHBZ#1844682

+    //

+    // If the "-kernel" QEMU option is not being used, this platform DXE driver

+    // should return EFI_NOT_FOUND, so that the DXE Core can unload it.

+    // However, the associated error message, logged by the DXE Core to the

+    // serial console, is not desired in the silent edk2-aarch64 build, given

+    // that the absence of "-kernel" is nothing out of the ordinary. Therefore,

+    // return success and stay resident. The wasted guest RAM still gets freed

+    // after ExitBootServices().

+    //

+    if (GetDebugPrintErrorLevel () == DEBUG_ERROR) {

+      Status = EFI_SUCCESS;

+    }

+

+ #endif

     goto FreeBlobs;

   }

-- 

2.35.1