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loader/multiboot_mbi2: Use central copy of grub_efi_find_mmap_size()

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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>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Leif Lindholm 2018-07-13 17:34:45 +01:00 committed by Daniel Kiper
parent 9415914e0f
commit 9bfba354bb
1 changed files with 1 additions and 37 deletions
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38
grub-core/loader/multiboot_mbi2.c
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@ -407,42 +407,6 @@ acpiv2_size (void)
static grub_efi_uintn_t efi_mmap_size = 0;
/* Find the optimal number of pages for the memory map. Is it better to
move this code to efi/mm.c? */
static void
find_efi_mmap_size (void)
{
efi_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 = efi_mmap_size;
mmap = grub_malloc (cur_mmap_size);
if (! mmap)
return;
ret = grub_efi_get_memory_map (&cur_mmap_size, mmap, 0, &desc_size, 0);
grub_free (mmap);
if (ret < 0)
return;
else if (ret > 0)
break;
if (efi_mmap_size < cur_mmap_size)
efi_mmap_size = cur_mmap_size;
efi_mmap_size += (1 << 12);
}
/* Increase the size a bit for safety, because GRUB allocates more on
later, and EFI itself may allocate more. */
efi_mmap_size += (3 << 12);
efi_mmap_size = ALIGN_UP (efi_mmap_size, 4096);
}
#endif
static grub_size_t
@ -463,7 +427,7 @@ grub_multiboot2_get_mbi_size (void)
{
#ifdef GRUB_MACHINE_EFI
if (!keep_bs && !efi_mmap_size)
find_efi_mmap_size ();
efi_mmap_size = grub_efi_find_mmap_size ();
#endif
return 2 * sizeof (grub_uint32_t) + sizeof (struct multiboot_tag)
+ sizeof (struct multiboot_tag)