[4/4] loader: drop local implementations of find_efi_mmap_size

Message ID 20170905204114.9462-5-leif.lindholm@linaro.org
State New
Headers show
Series
  • x86,efi: prerequisites for ARM* cleanup series
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Commit Message

Leif Lindholm Sept. 5, 2017, 8:41 p.m.
Now we have a grub_efi_find_mmap_size, replace near-identical implementations
in i386/linux and mbi2 loaders with calls to that one.

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

---
 grub-core/loader/i386/linux.c     | 51 +--------------------------------------
 grub-core/loader/multiboot_mbi2.c | 38 +----------------------------
 2 files changed, 2 insertions(+), 87 deletions(-)

-- 
2.11.0


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Comments

Daniel Kiper Sept. 13, 2017, 4:45 a.m. | #1
On Tue, Sep 05, 2017 at 09:41:14PM +0100, Leif Lindholm wrote:
> Now we have a grub_efi_find_mmap_size, replace near-identical implementations

> in i386/linux and mbi2 loaders with calls to that one.


Please do it in separate patches. And I think that
grub-core/commands/efi/lsefimmap.c:grub_cmd_lsefimmap()
begs for similar change too. In general please look for

grub_efi_get_memory_map (&map_size, NULL, NULL, &desc_size, 0)

calls or something like that.

Daniel

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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
diff --git a/grub-core/loader/multiboot_mbi2.c b/grub-core/loader/multiboot_mbi2.c
index b0679a9f6..b5f961494 100644
--- a/grub-core/loader/multiboot_mbi2.c
+++ b/grub-core/loader/multiboot_mbi2.c
@@ -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_multiboot_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)