hw/i386: Introduce X86_FW_OVMF Kconfig symbol

Introduce the X86_FW_OVMF Kconfig symbol for OVMF-specific code.
Move the OVMF-specific code from pc_sysfw.c to pc_sysfw_ovmf.c,
adding a pair of stubs.
Update MAINTAINERS to reach OVMF maintainers when these new
files are modified.

This fixes when building the microvm machine standalone:

  /usr/bin/ld: libqemu-i386-softmmu.fa.p/target_i386_monitor.c.o: in
  function `qmp_sev_inject_launch_secret':
  target/i386/monitor.c:749: undefined reference to `pc_system_ovmf_table_find'

Fixes: f522cef9b35 ("sev: update sev-inject-launch-secret to make gpa optional")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20210616204328.2611406-22-philmd@redhat.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/hw/i386/pc_sysfw_ovmf-stubs.c b/hw/i386/pc_sysfw_ovmf-stubs.c
new file mode 100644
index 0000000000..aabe78b271
--- /dev/null
+++ b/hw/i386/pc_sysfw_ovmf-stubs.c
@@ -0,0 +1,26 @@
+/*
+ * QEMU PC System Firmware (OVMF stubs)
+ *
+ * Copyright (c) 2021 Red Hat, Inc.
+ *
+ * Author:
+ *   Philippe Mathieu-Daudé <philmd@redhat.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/i386/pc.h"
+
+bool pc_system_ovmf_table_find(const char *entry, uint8_t **data, int *data_len)
+{
+    g_assert_not_reached();
+}
+
+void pc_system_parse_ovmf_flash(uint8_t *flash_ptr, size_t flash_size)
+{
+    g_assert_not_reached();
+}