From 46ae4e4b9574530e5081e98af0495d6f6d28379f Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 16 Jan 2025 16:03:01 +0100
Subject: OvmfPkg/QemuKernelLoaderFsDxe: accept absolute paths

EFI shell looks for "\startup.nsh".
Try "-fw_cfg name=etc/boot/startup.nsh,string='echo hello'" ;)

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
index 3e1a876bf0..5b90420dad 100644
--- a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
+++ b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
@@ -806,6 +806,11 @@ QemuKernelStubFileOpen (
   //
   // Locate the file.
   //
+  if (FileName[0] == '\\') {
+    // also accept absolute paths, i.e. '\kernel' for 'kernel'
+    FileName++;
+  }
+
   Blob = FindKernelBlob (FileName);
 
   if (Blob == NULL) {
-- 
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