Merge remote-tracking branches 'regulator/topic/s5m8767', 'regulator/topic/st-pwm...

[karo-tx-linux.git] / arch / x86 / platform / efi / efi.c

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 1a201ac7cef8a1f7f4ce5cff2a8f8dbc6b540c00..b97acecf3fd95667e2b67bba8f88bb80428480bb 100644 (file)
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -52,6 +52,7 @@
 #include <asm/tlbflush.h>
 #include <asm/x86_init.h>
 #include <asm/rtc.h>
+#include <asm/uv/uv.h>
 
 #define EFI_DEBUG
 
@@ -1210,3 +1211,22 @@ static int __init parse_efi_cmdline(char *str)
        return 0;
 }
 early_param("efi", parse_efi_cmdline);
+
+void __init efi_apply_memmap_quirks(void)
+{
+       /*
+        * Once setup is done earlier, unmap the EFI memory map on mismatched
+        * firmware/kernel architectures since there is no support for runtime
+        * services.
+        */
+       if (!efi_is_native()) {
+               pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
+               efi_unmap_memmap();
+       }
+
+       /*
+        * UV doesn't support the new EFI pagetable mapping yet.
+        */
+       if (is_uv_system())
+               set_bit(EFI_OLD_MEMMAP, &x86_efi_facility);
+}