powerpc/64s: Remove overlaps_kvm_tmp()

kvm_tmp is now in .text and so doesn't need a special overlap check.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190911115746.12433-2-mpe@ellerman.id.au

arch/powerpc/include/asm/sections.h

@@ -61,17 +61,6 @@ static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
 		(unsigned long)_stext < end;
 }
 
-static inline int overlaps_kvm_tmp(unsigned long start, unsigned long end)
-{
-#ifdef CONFIG_KVM_GUEST
-	extern char kvm_tmp[];
-	return start < (unsigned long)kvm_tmp &&
-		(unsigned long)&kvm_tmp[1024 * 1024] < end;
-#else
-	return 0;
-#endif
-}
-
 #ifdef PPC64_ELF_ABI_v1
 
 #define HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR 1

arch/powerpc/mm/book3s64/hash_utils.c

@@ -273,10 +273,6 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
 		if (overlaps_kernel_text(vaddr, vaddr + step))
 			tprot &= ~HPTE_R_N;
 
-		/* Make kvm guest trampolines executable */
-		if (overlaps_kvm_tmp(vaddr, vaddr + step))
-			tprot &= ~HPTE_R_N;
-
 		/*
 		 * If relocatable, check if it overlaps interrupt vectors that
 		 * are copied down to real 0. For relocatable kernel