arm64: move PAC masks to <asm/pointer_auth.h>

Now that we use XPACLRI to strip PACs within the kernel, the
ptrauth_user_pac_mask() and ptrauth_kernel_pac_mask() definitions no
longer need to live in <asm/compiler.h>.

Move them to <asm/pointer_auth.h>, and ensure that this header is
included where they are used.

Signed-off-by: Mark Rutland <[e-mail]>
Cc: Amit Daniel Kachhap <[e-mail]>
Cc: Catalin Marinas <[e-mail]>
Cc: James Morse <[e-mail]>
Cc: Kristina Martsenko <[e-mail]>
Cc: Will Deacon <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Will Deacon <[e-mail]>

arch/arm64/include/asm/compiler.h

···
 #define ARM64_ASM_PREAMBLE
 #endif
 
-/*
- * The EL0/EL1 pointer bits used by a pointer authentication code.
- * This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply.
- */
-#define ptrauth_user_pac_mask()		GENMASK_ULL(54, vabits_actual)
-#define ptrauth_kernel_pac_mask()	GENMASK_ULL(63, vabits_actual)
-
 #define xpaclri(ptr)							\
 ({									\
 	register unsigned long __xpaclri_ptr asm("x30") = (ptr);	\

arch/arm64/include/asm/pointer_auth.h

···
 #include <asm/memory.h>
 #include <asm/sysreg.h>
 
+/*
+ * The EL0/EL1 pointer bits used by a pointer authentication code.
+ * This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply.
+ */
+#define ptrauth_user_pac_mask()		GENMASK_ULL(54, vabits_actual)
+#define ptrauth_kernel_pac_mask()	GENMASK_ULL(63, vabits_actual)
+
 #define PR_PAC_ENABLED_KEYS_MASK                                               \
 	(PR_PAC_APIAKEY | PR_PAC_APIBKEY | PR_PAC_APDAKEY | PR_PAC_APDBKEY)
 

arch/arm64/kernel/crash_core.c

···
 #include <asm/cpufeature.h>
 #include <asm/memory.h>
 #include <asm/pgtable-hwdef.h>
+#include <asm/pointer_auth.h>
 
 static inline u64 get_tcr_el1_t1sz(void);