From 966f1ca56ffe6e2c4d1333df59bcec233587aabc Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 25 Apr 2022 15:50:50 +0200
Subject: [PATCH] i386: factor out x86_firmware_configure()
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move sev firmware setup to separate function so it can be used from
other code paths.  No functional change.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20220425135051.551037-3-kraxel@redhat.com>
---
 hw/i386/pc_sysfw.c    | 36 ++++++++++++++++++++++--------------
 include/hw/i386/x86.h |  3 +++
 2 files changed, 25 insertions(+), 14 deletions(-)

diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index 0540047bad..c8d9e71b88 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -147,7 +147,6 @@ static void pc_system_flash_map(PCMachineState *pcms,
     MemoryRegion *flash_mem;
     void *flash_ptr;
     int flash_size;
-    int ret;
 
     assert(PC_MACHINE_GET_CLASS(pcms)->pci_enabled);
 
@@ -195,19 +194,7 @@ static void pc_system_flash_map(PCMachineState *pcms,
             if (sev_enabled()) {
                 flash_ptr = memory_region_get_ram_ptr(flash_mem);
                 flash_size = memory_region_size(flash_mem);
-                /*
-                 * OVMF places a GUIDed structures in the flash, so
-                 * search for them
-                 */
-                pc_system_parse_ovmf_flash(flash_ptr, flash_size);
-
-                ret = sev_es_save_reset_vector(flash_ptr, flash_size);
-                if (ret) {
-                    error_report("failed to locate and/or save reset vector");
-                    exit(1);
-                }
-
-                sev_encrypt_flash(flash_ptr, flash_size, &error_fatal);
+                x86_firmware_configure(flash_ptr, flash_size);
             }
         }
     }
@@ -259,3 +246,24 @@ void pc_system_firmware_init(PCMachineState *pcms,
 
     pc_system_flash_cleanup_unused(pcms);
 }
+
+void x86_firmware_configure(void *ptr, int size)
+{
+    int ret;
+
+    /*
+     * OVMF places a GUIDed structures in the flash, so
+     * search for them
+     */
+    pc_system_parse_ovmf_flash(ptr, size);
+
+    if (sev_enabled()) {
+        ret = sev_es_save_reset_vector(ptr, size);
+        if (ret) {
+            error_report("failed to locate and/or save reset vector");
+            exit(1);
+        }
+
+        sev_encrypt_flash(ptr, size, &error_fatal);
+    }
+}
diff --git a/include/hw/i386/x86.h b/include/hw/i386/x86.h
index 916cc325ee..4841a49f86 100644
--- a/include/hw/i386/x86.h
+++ b/include/hw/i386/x86.h
@@ -140,4 +140,7 @@ void gsi_handler(void *opaque, int n, int level);
 void ioapic_init_gsi(GSIState *gsi_state, const char *parent_name);
 DeviceState *ioapic_init_secondary(GSIState *gsi_state);
 
+/* pc_sysfw.c */
+void x86_firmware_configure(void *ptr, int size);
+
 #endif