[1/3] loader/i386/linux: use central copy of grub_efi_find_mmap_size

Message ID 20180713163445.29478-2-leif.lindholm@linaro.org
State New
Headers show
Series
  • use central copy of grub_efi_find_mmap_size
Related show

Commit Message

Leif Lindholm July 13, 2018, 4:34 p.m.
Delete local copy of function to determine required buffer size for the
UEFI memory map, use helper in kern/efi/mm.c.

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>

---
 grub-core/loader/i386/linux.c | 51 +------------------------------------------
 1 file changed, 1 insertion(+), 50 deletions(-)

-- 
2.11.0


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Patch

diff --git a/grub-core/loader/i386/linux.c b/grub-core/loader/i386/linux.c
index 44301e126..ab02add53 100644
--- a/grub-core/loader/i386/linux.c
+++ b/grub-core/loader/i386/linux.c
@@ -101,55 +101,6 @@  page_align (grub_size_t size)
   return (size + (1 << 12) - 1) & (~((1 << 12) - 1));
 }
 
-#ifdef GRUB_MACHINE_EFI
-/* Find the optimal number of pages for the memory map. Is it better to
-   move this code to efi/mm.c?  */
-static grub_efi_uintn_t
-find_efi_mmap_size (void)
-{
-  static grub_efi_uintn_t mmap_size = 0;
-
-  if (mmap_size != 0)
-    return mmap_size;
-
-  mmap_size = (1 << 12);
-  while (1)
-    {
-      int ret;
-      grub_efi_memory_descriptor_t *mmap;
-      grub_efi_uintn_t desc_size;
-      grub_efi_uintn_t cur_mmap_size = mmap_size;
-
-      mmap = grub_malloc (cur_mmap_size);
-      if (! mmap)
-	return 0;
-
-      ret = grub_efi_get_memory_map (&cur_mmap_size, mmap, 0, &desc_size, 0);
-      grub_free (mmap);
-
-      if (ret < 0)
-	{
-	  grub_error (GRUB_ERR_IO, "cannot get memory map");
-	  return 0;
-	}
-      else if (ret > 0)
-	break;
-
-      if (mmap_size < cur_mmap_size)
-	mmap_size = cur_mmap_size;
-      mmap_size += (1 << 12);
-    }
-
-  /* Increase the size a bit for safety, because GRUB allocates more on
-     later, and EFI itself may allocate more.  */
-  mmap_size += (3 << 12);
-
-  mmap_size = page_align (mmap_size);
-  return mmap_size;
-}
-
-#endif
-
 /* Helper for find_mmap_size.  */
 static int
 count_hook (grub_uint64_t addr __attribute__ ((unused)),
@@ -560,7 +511,7 @@  grub_linux_boot (void)
   ctx.real_size = ALIGN_UP (cl_offset + maximal_cmdline_size, 4096);
 
 #ifdef GRUB_MACHINE_EFI
-  efi_mmap_size = find_efi_mmap_size ();
+  efi_mmap_size = grub_efi_find_mmap_size ();
   if (efi_mmap_size == 0)
     return grub_errno;
 #endif