efi, x86: Rearrange efi_mem_attributes()

x86 and ia64 implement efi_mem_attributes() differently. This
function needs to be available for other architectures
(such as arm64) as well, such as for the purpose of ACPI/APEI.

ia64 EFI does not set up a 'memmap' variable and does not set
the EFI_MEMMAP flag, so it needs to have its unique implementation
of efi_mem_attributes().

Move efi_mem_attributes() implementation from x86 to the core
EFI code, and declare it with __weak.

It is recommended that other architectures should not override
the default implementation.

Signed-off-by: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Reviewed-by: Matt Fleming <matt.fleming@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1438936621-5215-4-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 0 insertions, 18 deletions

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index e4308fe6afe8..2f61fcddcddb 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -952,24 +952,6 @@ u32 efi_mem_type(unsigned long phys_addr)
         return 0;
 }
 
-u64 efi_mem_attributes(unsigned long phys_addr)
-{
-        efi_memory_desc_t *md;
-        void *p;
-
-        if (!efi_enabled(EFI_MEMMAP))
-                return 0;
-
-        for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
-                md = p;
-                if ((md->phys_addr <= phys_addr) &&
-                    (phys_addr < (md->phys_addr +
-                                  (md->num_pages << EFI_PAGE_SHIFT))))
-                        return md->attribute;
-        }
-        return 0;
-}
-
 static int __init arch_parse_efi_cmdline(char *str)
 {
         if (!str) {