Merge tag 'efi-fixes-for-v6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi

Pull EFI fix from Ard Biesheuvel:
 "A single revert for some code that I added during this cycle. The code
  is not wrong, but it should be a bit more careful about how to handle
  the shadow call stack pointer, so it is better to revert it for now
  and bring it back later in improved form.

  Summary:

   - Revert runtime service sync exception recovery on arm64"

* tag 'efi-fixes-for-v6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  arm64: efi: Revert "Recover from synchronous exceptions ..."

1 files changed, 0 insertions, 26 deletions

diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index ee53f2a0aa03..a908a37f0367 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -9,7 +9,6 @@
 
 #include <linux/efi.h>
 #include <linux/init.h>
-#include <linux/percpu.h>
 
 #include <asm/efi.h>
 
@@ -145,28 +144,3 @@ asmlinkage efi_status_t efi_handle_corrupted_x18(efi_status_t s, const char *f)
 	pr_err_ratelimited(FW_BUG "register x18 corrupted by EFI %s\n", f);
 	return s;
 }
-
-asmlinkage DEFINE_PER_CPU(u64, __efi_rt_asm_recover_sp);
-
-asmlinkage efi_status_t __efi_rt_asm_recover(void);
-
-asmlinkage efi_status_t efi_handle_runtime_exception(const char *f)
-{
-	pr_err(FW_BUG "Synchronous exception occurred in EFI runtime service %s()\n", f);
-	clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
-	return EFI_ABORTED;
-}
-
-bool efi_runtime_fixup_exception(struct pt_regs *regs, const char *msg)
-{
-	 /* Check whether the exception occurred while running the firmware */
-	if (current_work() != &efi_rts_work.work || regs->pc >= TASK_SIZE_64)
-		return false;
-
-	pr_err(FW_BUG "Unable to handle %s in EFI runtime service\n", msg);
-	add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
-	dump_stack();
-
-	regs->pc = (u64)__efi_rt_asm_recover;
-	return true;
-}