[PATCH] hw/i386: return an error message when mb magic/pvh note could not be found

[nathan]

When using a non-linux kernel where the multiboot magic is
misconfigured the following message would display: "linux kernel too old to 
load a ram
disk".

This patch instead, displays a more descriptive error message: "could not find 
multiboot magic or PVH ELF Note". The linux specific boot sequence is skipped 
because earlier it is asserted that the linux protocol magic field could not be 
found.

Signed-off-by: Nathan Kolpa <nathan@kolpa.me>
---
 hw/i386/x86.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index 2b6291ad8d..b59f1180f5 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -902,7 +902,10 @@ void x86_load_linux(X86MachineState *x86ms,
 
             return;
         }
-        protocol = 0;
+
+        fprintf(stderr, "qemu: could not find multiboot magic or "
+                "PVH ELF Note.\n");
+        exit(1);
     }
 
     if (protocol < 0x200 || !(header[0x211] & 0x01)) {
-- 
2.43.0