efi: Add macro for EFI_MEMORY_UCE memory attribute

Add the following macro from the UEFI spec, for completeness:

  EFI_MEMORY_UCE  Memory cacheability attribute: The memory region
                  supports being configured as not cacheable, exported,
                  and supports the "fetch and add" semaphore mechanism.

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

diff --git a/include/linux/efi.h b/include/linux/efi.h
index 4812ed0..7464032 100644 (file)
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -92,6 +92,7 @@ typedef       struct {
 #define EFI_MEMORY_WC          ((u64)0x0000000000000002ULL)    /* write-coalescing */
 #define EFI_MEMORY_WT          ((u64)0x0000000000000004ULL)    /* write-through */
 #define EFI_MEMORY_WB          ((u64)0x0000000000000008ULL)    /* write-back */
+#define EFI_MEMORY_UCE         ((u64)0x0000000000000010ULL)    /* uncached, exported */
 #define EFI_MEMORY_WP          ((u64)0x0000000000001000ULL)    /* write-protect */
 #define EFI_MEMORY_RP          ((u64)0x0000000000002000ULL)    /* read-protect */
 #define EFI_MEMORY_XP          ((u64)0x0000000000004000ULL)    /* execute-protect */