Some multiboot images could be in the ELF format. In the current
implementation QEMU fails because we try to load these images
as a PVH image.
In order to fix this issue, we should try multiboot first (we
already check the multiboot magic header before to load it).
If it is not a multiboot image, we can try the PVH loader.
Fixes: ab969087da6 ("pvh: Boot uncompressed kernel using direct boot ABI",
2019-01-15)
Reported-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Stefano Garzarella <sgarz...@redhat.com>
---
hw/i386/pc.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 3889eccdc3..207c267093 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1209,6 +1209,17 @@ static void load_linux(PCMachineState *pcms,
if (ldl_p(header+0x202) == 0x53726448) {
protocol = lduw_p(header+0x206);
} else {
+ /*
+ * This could be a multiboot kernel. If it is, let's stop treating it
+ * like a Linux kernel.
+ * Note: some multiboot images could be in the ELF format (the same of
+ * PVH), so we try multiboot first since we check the multiboot magic
+ * header before to load it.
+ */
+ if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename,
+ kernel_cmdline, kernel_size, header)) {
+ return;
+ }
/*
* Check if the file is an uncompressed kernel file (ELF) and load it,
* saving the PVH entry point used by the x86/HVM direct boot ABI.
@@ -1262,12 +1273,6 @@ static void load_linux(PCMachineState *pcms,
return;
}
- /* This looks like a multiboot kernel. If it is, let's stop
- treating it like a Linux kernel. */
- if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename,
- kernel_cmdline, kernel_size, header)) {
- return;
- }
protocol = 0;
}
--
2.20.1
