[PATCH v3 2/4] efi/boot.c: add file.need_to_free and split display_file_info()

[Trammell Hudson <hudson@xxxxxxxx>]

add file.need_to_free and split display_file_info()

Signed-off-by: Trammell hudson <hudson@xxxxxxxx>
---
 xen/common/efi/boot.c | 36 ++++++++++++++++++++++--------------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/xen/common/efi/boot.c b/xen/common/efi/boot.c
index 4022a672c9..f5bdc4b1df 100644
--- a/xen/common/efi/boot.c
+++ b/xen/common/efi/boot.c
@@ -102,6 +102,7 @@ union string {

 struct file {
     UINTN size;
+    bool need_to_free;
     union {
         EFI_PHYSICAL_ADDRESS addr;
         void *ptr;
@@ -279,13 +280,13 @@ void __init noreturn blexit(const CHAR16 *str)
     if ( !efi_bs )
         efi_arch_halt();

-    if ( cfg.addr )
+    if ( cfg.addr && cfg.need_to_free )
         efi_bs->FreePages(cfg.addr, PFN_UP(cfg.size));
-    if ( kernel.addr )
+    if ( kernel.addr && kernel.need_to_free )
         efi_bs->FreePages(kernel.addr, PFN_UP(kernel.size));
-    if ( ramdisk.addr )
+    if ( ramdisk.addr && ramdisk.need_to_free )
         efi_bs->FreePages(ramdisk.addr, PFN_UP(ramdisk.size));
-    if ( xsm.addr )
+    if ( xsm.addr && xsm.need_to_free )
         efi_bs->FreePages(xsm.addr, PFN_UP(xsm.size));

     efi_arch_blexit();
@@ -538,6 +539,21 @@ static char * __init split_string(char *s)
     return NULL;
 }

+static void __init display_file_info(CHAR16 *name, struct file *file, char 
*options)
+{
+    if ( file == &cfg )
+        return;
+
+    PrintStr(name);
+    PrintStr(L": ");
+    DisplayUint(file->addr, 2 * sizeof(file->addr));
+    PrintStr(L"-");
+    DisplayUint(file->addr + file->size, 2 * sizeof(file->addr));
+    PrintStr(newline);
+
+    efi_arch_handle_module(file, name, options);
+}
+
 static bool __init read_file(EFI_FILE_HANDLE dir_handle, CHAR16 *name,
                              struct file *file, char *options)
 {
@@ -572,6 +588,7 @@ static bool __init read_file(EFI_FILE_HANDLE dir_handle, 
CHAR16 *name,
                          HYPERVISOR_VIRT_END - DIRECTMAP_VIRT_START);
         ret = efi_bs->AllocatePages(AllocateMaxAddress, EfiLoaderData,
                                     PFN_UP(size), &file->addr);
+        file->need_to_free = true;
     }
     if ( EFI_ERROR(ret) )
     {
@@ -581,16 +598,7 @@ static bool __init read_file(EFI_FILE_HANDLE dir_handle, 
CHAR16 *name,
     else
     {
         file->size = size;
-        if ( file != &cfg )
-        {
-            PrintStr(name);
-            PrintStr(L": ");
-            DisplayUint(file->addr, 2 * sizeof(file->addr));
-            PrintStr(L"-");
-            DisplayUint(file->addr + size, 2 * sizeof(file->addr));
-            PrintStr(newline);
-            efi_arch_handle_module(file, name, options);
-        }
+        display_file_info(name, file, options);

         ret = FileHandle->Read(FileHandle, &file->size, file->ptr);
         if ( !EFI_ERROR(ret) && file->size != size )
--
2.25.1