Hi Ard,

On 02/16/2016 03:25 PM, Baicar, Tyler wrote:

On 2/15/2016 4:32 AM, Ard Biesheuvel wrote:

quoted

ESRT support is built by default for all architectures that define
CONFIG_EFI. However, this support was not wired up yet for ARM/arm64,
since efi_esrt_init() was never called. So add the missing call.

Since efi_esrt_init() uses efi_mem_desc_lookup(), which in turn relies
on efi.memmap having been assigned and populated completetely, add the
missing assignments of efi.memmap and efi.memmap->nr_map.

Signed-off-by: Ard Biesheuvel <redacted>
---
  drivers/firmware/efi/arm-init.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/drivers/firmware/efi/arm-init.c

b/drivers/firmware/efi/arm-init.c
index 9e15d571b53c..5c5e799bdb50 100644

--- a/drivers/firmware/efi/arm-init.c
+++ b/drivers/firmware/efi/arm-init.c

@@ -197,10 +197,13 @@ void __init efi_init(void)
      memmap.map_end = memmap.map + params.mmap_size;
      memmap.desc_size = params.desc_size;
      memmap.desc_version = params.desc_ver;
+    memmap.nr_map = params.mmap_size / params.desc_size;
+    efi.memmap = &memmap;
        if (uefi_init() < 0)
          return;
  +    efi_esrt_init();

This call to efi_esrt_init() is failing because efi.flags does not have
EFI_MEMMAP set. This flag gets set at the end of reserve_regions(). I
tested moving the set_bit() call from reserve_regions() to just before
efi_esrt_init() and also tested moving efi_esrt_init() to just after
reserve_regions(). Both of these options worked.

quoted

      reserve_regions();
      early_memunmap(memmap.map, params.mmap_size);
      memblock_mark_nomap(params.mmap & PAGE_MASK,

Do you expect to respin this patch in the near future?

Thanks,
Cov

-- 
Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project