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-rw-r--r--arch/arm64/include/asm/efi.h12
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index c4cd5081d78b..8389050328bb 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -121,19 +121,21 @@ static inline void efi_set_pgd(struct mm_struct *mm)
if (mm != current->active_mm) {
/*
* Update the current thread's saved ttbr0 since it is
- * restored as part of a return from exception. Set
- * the hardware TTBR0_EL1 using cpu_switch_mm()
- * directly to enable potential errata workarounds.
+ * restored as part of a return from exception. Enable
+ * access to the valid TTBR0_EL1 and invoke the errata
+ * workaround directly since there is no return from
+ * exception when invoking the EFI run-time services.
*/
update_saved_ttbr0(current, mm);
- cpu_switch_mm(mm->pgd, mm);
+ uaccess_ttbr0_enable();
+ post_ttbr_update_workaround();
} else {
/*
* Defer the switch to the current thread's TTBR0_EL1
* until uaccess_enable(). Restore the current
* thread's saved ttbr0 corresponding to its active_mm
*/
- cpu_set_reserved_ttbr0();
+ uaccess_ttbr0_disable();
update_saved_ttbr0(current, current->active_mm);
}
}