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x86/loader: add -shim option

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Add new -shim command line option, wire up for the x86 loader.
When specified load shim into the new "etc/boot/shim" fw_cfg file.

Needs OVMF changes too to be actually useful.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-ID: <20240905141211.1253307-6-kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2024-09-05 16:12:10 +02:00
parent f2594d9284
commit a5bd044b15
5 changed files with 53 additions and 0 deletions
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16
hw/i386/x86-common.c
View file

@ -965,6 +965,22 @@ void x86_load_linux(X86MachineState *x86ms,
/* kernel without setup header patches */
fw_cfg_add_file(fw_cfg, "etc/boot/kernel", kernel, kernel_size);
if (machine->shim_filename) {
GMappedFile *mapped_file;
GError *gerr = NULL;
mapped_file = g_mapped_file_new(machine->shim_filename, false, &gerr);
if (!mapped_file) {
fprintf(stderr, "qemu: error reading shim %s: %s\n",
machine->shim_filename, gerr->message);
exit(1);
}
fw_cfg_add_file(fw_cfg, "etc/boot/shim",
g_mapped_file_get_contents(mapped_file),
g_mapped_file_get_length(mapped_file));
}
if (sev_enabled()) {
sev_add_kernel_loader_hashes(&sev_load_ctx, &error_fatal);
}