1 files changed, 15 insertions, 0 deletions

diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index ac3aa54e2654..ddb0174cf093 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -58,6 +58,21 @@ static void __init early_code_mapping_set_exec(int executable)
         }
 }
 
+unsigned long efi_call_virt_prelog(void)
+{
+        unsigned long saved;
+
+        saved = read_cr3();
+        write_cr3(real_mode_header->trampoline_pgd);
+
+        return saved;
+}
+
+void efi_call_virt_epilog(unsigned long saved)
+{
+        write_cr3(saved);
+}
+
 void __init efi_call_phys_prelog(void)
 {
         unsigned long vaddress;