Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Will Deacon:
 "ACPI:

   - Improve error reporting when failing to manage SDEI on AGDI device
     removal

  Assembly routines:

   - Improve register constraints so that the compiler can make use of
     the zero register instead of moving an immediate #0 into a GPR

   - Allow the compiler to allocate the registers used for CAS
     instructions

  CPU features and system registers:

   - Cleanups to the way in which CPU features are identified from the
     ID register fields

   - Extend system register definition generation to handle Enum types
     when defining shared register fields

   - Generate definitions for new _EL2 registers and add new fields for
     ID_AA64PFR1_EL1

   - Allow SVE to be disabled separately from SME on the kernel
     command-line

  Tracing:

   - Support for "direct calls" in ftrace, which enables BPF tracing for
     arm64

  Kdump:

   - Don't bother unmapping the crashkernel from the linear mapping,
     which then allows us to use huge (block) mappings and reduce TLB
     pressure when a crashkernel is loaded.

  Memory management:

   - Try again to remove data cache invalidation from the coherent DMA
     allocation path

   - Simplify the fixmap code by mapping at page granularity

   - Allow the kfence pool to be allocated early, preventing the rest of
     the linear mapping from being forced to page granularity

  Perf and PMU:

   - Move CPU PMU code out to drivers/perf/ where it can be reused by
     the 32-bit ARM architecture when running on ARMv8 CPUs

   - Fix race between CPU PMU probing and pKVM host de-privilege

   - Add support for Apple M2 CPU PMU

   - Adjust the generic PERF_COUNT_HW_BRANCH_INSTRUCTIONS event
     dynamically, depending on what the CPU actually supports

   - Minor fixes and cleanups to system PMU drivers

  Stack tracing:

   - Use the XPACLRI instruction to strip PAC from pointers, rather than
     rolling our own function in C

   - Remove redundant PAC removal for toolchains that handle this in
     their builtins

   - Make backtracing more resilient in the face of instrumentation

  Miscellaneous:

   - Fix single-step with KGDB

   - Remove harmless warning when 'nokaslr' is passed on the kernel
     command-line

   - Minor fixes and cleanups across the board"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (72 commits)
  KVM: arm64: Ensure CPU PMU probes before pKVM host de-privilege
  arm64: kexec: include reboot.h
  arm64: delete dead code in this_cpu_set_vectors()
  arm64/cpufeature: Use helper macro to specify ID register for capabilites
  drivers/perf: hisi: add NULL check for name
  drivers/perf: hisi: Remove redundant initialized of pmu->name
  arm64/cpufeature: Consistently use symbolic constants for min_field_value
  arm64/cpufeature: Pull out helper for CPUID register definitions
  arm64/sysreg: Convert HFGITR_EL2 to automatic generation
  ACPI: AGDI: Improve error reporting for problems during .remove()
  arm64: kernel: Fix kernel warning when nokaslr is passed to commandline
  perf/arm-cmn: Fix port detection for CMN-700
  arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step
  arm64: move PAC masks to <asm/pointer_auth.h>
  arm64: use XPACLRI to strip PAC
  arm64: avoid redundant PAC stripping in __builtin_return_address()
  arm64/sme: Fix some comments of ARM SME
  arm64/signal: Alloc tpidr2 sigframe after checking system_supports_tpidr2()
  arm64/signal: Use system_supports_tpidr2() to check TPIDR2
  arm64/idreg: Don't disable SME when disabling SVE
  ...

17 files changed, 249 insertions, 323 deletions

diff --git a/arch/arm64/include/asm/arm_pmuv3.h b/arch/arm64/include/asm/arm_pmuv3.h
new file mode 100644
index 000000000000..d6b51deb7bf0
--- /dev/null
+++ b/arch/arm64/include/asm/arm_pmuv3.h
@@ -0,0 +1,155 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ */
+
+#ifndef __ASM_PMUV3_H
+#define __ASM_PMUV3_H
+
+#include <linux/kvm_host.h>
+
+#include <asm/cpufeature.h>
+#include <asm/sysreg.h>
+
+#define RETURN_READ_PMEVCNTRN(n) \
+	return read_sysreg(pmevcntr##n##_el0)
+static unsigned long read_pmevcntrn(int n)
+{
+	PMEVN_SWITCH(n, RETURN_READ_PMEVCNTRN);
+	return 0;
+}
+
+#define WRITE_PMEVCNTRN(n) \
+	write_sysreg(val, pmevcntr##n##_el0)
+static void write_pmevcntrn(int n, unsigned long val)
+{
+	PMEVN_SWITCH(n, WRITE_PMEVCNTRN);
+}
+
+#define WRITE_PMEVTYPERN(n) \
+	write_sysreg(val, pmevtyper##n##_el0)
+static void write_pmevtypern(int n, unsigned long val)
+{
+	PMEVN_SWITCH(n, WRITE_PMEVTYPERN);
+}
+
+static inline unsigned long read_pmmir(void)
+{
+	return read_cpuid(PMMIR_EL1);
+}
+
+static inline u32 read_pmuver(void)
+{
+	u64 dfr0 = read_sysreg(id_aa64dfr0_el1);
+
+	return cpuid_feature_extract_unsigned_field(dfr0,
+			ID_AA64DFR0_EL1_PMUVer_SHIFT);
+}
+
+static inline void write_pmcr(u32 val)
+{
+	write_sysreg(val, pmcr_el0);
+}
+
+static inline u32 read_pmcr(void)
+{
+	return read_sysreg(pmcr_el0);
+}
+
+static inline void write_pmselr(u32 val)
+{
+	write_sysreg(val, pmselr_el0);
+}
+
+static inline void write_pmccntr(u64 val)
+{
+	write_sysreg(val, pmccntr_el0);
+}
+
+static inline u64 read_pmccntr(void)
+{
+	return read_sysreg(pmccntr_el0);
+}
+
+static inline void write_pmxevcntr(u32 val)
+{
+	write_sysreg(val, pmxevcntr_el0);
+}
+
+static inline u32 read_pmxevcntr(void)
+{
+	return read_sysreg(pmxevcntr_el0);
+}
+
+static inline void write_pmxevtyper(u32 val)
+{
+	write_sysreg(val, pmxevtyper_el0);
+}
+
+static inline void write_pmcntenset(u32 val)
+{
+	write_sysreg(val, pmcntenset_el0);
+}
+
+static inline void write_pmcntenclr(u32 val)
+{
+	write_sysreg(val, pmcntenclr_el0);
+}
+
+static inline void write_pmintenset(u32 val)
+{
+	write_sysreg(val, pmintenset_el1);
+}
+
+static inline void write_pmintenclr(u32 val)
+{
+	write_sysreg(val, pmintenclr_el1);
+}
+
+static inline void write_pmccfiltr(u32 val)
+{
+	write_sysreg(val, pmccfiltr_el0);
+}
+
+static inline void write_pmovsclr(u32 val)
+{
+	write_sysreg(val, pmovsclr_el0);
+}
+
+static inline u32 read_pmovsclr(void)
+{
+	return read_sysreg(pmovsclr_el0);
+}
+
+static inline void write_pmuserenr(u32 val)
+{
+	write_sysreg(val, pmuserenr_el0);
+}
+
+static inline u32 read_pmceid0(void)
+{
+	return read_sysreg(pmceid0_el0);
+}
+
+static inline u32 read_pmceid1(void)
+{
+	return read_sysreg(pmceid1_el0);
+}
+
+static inline bool pmuv3_implemented(int pmuver)
+{
+	return !(pmuver == ID_AA64DFR0_EL1_PMUVer_IMP_DEF ||
+		 pmuver == ID_AA64DFR0_EL1_PMUVer_NI);
+}
+
+static inline bool is_pmuv3p4(int pmuver)
+{
+	return pmuver >= ID_AA64DFR0_EL1_PMUVer_V3P4;
+}
+
+static inline bool is_pmuv3p5(int pmuver)
+{
+	return pmuver >= ID_AA64DFR0_EL1_PMUVer_V3P5;
+}
+
+#endif
diff --git a/arch/arm64/include/asm/atomic_lse.h b/arch/arm64/include/asm/atomic_lse.h
index a94d6dacc029..319958b95cfd 100644
--- a/arch/arm64/include/asm/atomic_lse.h
+++ b/arch/arm64/include/asm/atomic_lse.h
@@ -251,22 +251,15 @@ __lse__cmpxchg_case_##name##sz(volatile void *ptr,			\
 					      u##sz old,		\
 					      u##sz new)		\
 {									\
-	register unsigned long x0 asm ("x0") = (unsigned long)ptr;	\
-	register u##sz x1 asm ("x1") = old;				\
-	register u##sz x2 asm ("x2") = new;				\
-	unsigned long tmp;						\
-									\
 	asm volatile(							\
 	__LSE_PREAMBLE							\
-	"	mov	%" #w "[tmp], %" #w "[old]\n"			\
-	"	cas" #mb #sfx "\t%" #w "[tmp], %" #w "[new], %[v]\n"	\
-	"	mov	%" #w "[ret], %" #w "[tmp]"			\
-	: [ret] "+r" (x0), [v] "+Q" (*(u##sz *)ptr),			\
-	  [tmp] "=&r" (tmp)						\
-	: [old] "r" (x1), [new] "r" (x2)				\
+	"	cas" #mb #sfx "	%" #w "[old], %" #w "[new], %[v]\n"	\
+	: [v] "+Q" (*(u##sz *)ptr),					\
+	  [old] "+r" (old)						\
+	: [new] "rZ" (new)						\
 	: cl);								\
 									\
-	return x0;							\
+	return old;							\
 }
 
 __CMPXCHG_CASE(w, b,     ,  8,   )
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index 3dd8982a9ce3..cf2987464c18 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -131,25 +131,25 @@ do {									\
 	case 1:								\
 		asm volatile ("stlrb %w1, %0"				\
 				: "=Q" (*__p)				\
-				: "r" (*(__u8 *)__u.__c)		\
+				: "rZ" (*(__u8 *)__u.__c)		\
 				: "memory");				\
 		break;							\
 	case 2:								\
 		asm volatile ("stlrh %w1, %0"				\
 				: "=Q" (*__p)				\
-				: "r" (*(__u16 *)__u.__c)		\
+				: "rZ" (*(__u16 *)__u.__c)		\
 				: "memory");				\
 		break;							\
 	case 4:								\
 		asm volatile ("stlr %w1, %0"				\
 				: "=Q" (*__p)				\
-				: "r" (*(__u32 *)__u.__c)		\
+				: "rZ" (*(__u32 *)__u.__c)		\
 				: "memory");				\
 		break;							\
 	case 8:								\
-		asm volatile ("stlr %1, %0"				\
+		asm volatile ("stlr %x1, %0"				\
 				: "=Q" (*__p)				\
-				: "r" (*(__u64 *)__u.__c)		\
+				: "rZ" (*(__u64 *)__u.__c)		\
 				: "memory");				\
 		break;							\
 	}								\
diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index 9f362274a4f7..74575c3d6987 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -83,10 +83,6 @@ struct compat_statfs {
 	int		f_spare[4];
 };
 
-#define COMPAT_RLIM_INFINITY		0xffffffff
-
-#define COMPAT_OFF_T_MAX	0x7fffffff
-
 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
 #define COMPAT_MINSIGSTKSZ	2048
 
diff --git a/arch/arm64/include/asm/compiler.h b/arch/arm64/include/asm/compiler.h
index 6fb2e6bcc392..9bbd7b7097ff 100644
--- a/arch/arm64/include/asm/compiler.h
+++ b/arch/arm64/include/asm/compiler.h
@@ -8,19 +8,33 @@
 #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);	\
+									\
+	asm(								\
+	ARM64_ASM_PREAMBLE						\
+	"	hint	#7\n"						\
+	: "+r" (__xpaclri_ptr));					\
+									\
+	__xpaclri_ptr;							\
+})
 
-/* Valid for EL0 TTBR0 and EL1 TTBR1 instruction pointers */
-#define ptrauth_clear_pac(ptr)						\
-	((ptr & BIT_ULL(55)) ? (ptr | ptrauth_kernel_pac_mask()) :	\
-			       (ptr & ~ptrauth_user_pac_mask()))
+#ifdef CONFIG_ARM64_PTR_AUTH_KERNEL
+#define ptrauth_strip_kernel_insn_pac(ptr)	xpaclri(ptr)
+#else
+#define ptrauth_strip_kernel_insn_pac(ptr)	(ptr)
+#endif
+
+#ifdef CONFIG_ARM64_PTR_AUTH
+#define ptrauth_strip_user_insn_pac(ptr)	xpaclri(ptr)
+#else
+#define ptrauth_strip_user_insn_pac(ptr)	(ptr)
+#endif
 
+#if !defined(CONFIG_BUILTIN_RETURN_ADDRESS_STRIPS_PAC)
 #define __builtin_return_address(val)					\
-	(void *)(ptrauth_clear_pac((unsigned long)__builtin_return_address(val)))
+	(void *)(ptrauth_strip_kernel_insn_pac((unsigned long)__builtin_return_address(val)))
+#endif
 
 #endif /* __ASM_COMPILER_H */
diff --git a/arch/arm64/include/asm/debug-monitors.h b/arch/arm64/include/asm/debug-monitors.h
index 7b7e05c02691..13d437bcbf58 100644
--- a/arch/arm64/include/asm/debug-monitors.h
+++ b/arch/arm64/include/asm/debug-monitors.h
@@ -104,6 +104,7 @@ void user_regs_reset_single_step(struct user_pt_regs *regs,
 void kernel_enable_single_step(struct pt_regs *regs);
 void kernel_disable_single_step(void);
 int kernel_active_single_step(void);
+void kernel_rewind_single_step(struct pt_regs *regs);
 
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
 int reinstall_suspended_bps(struct pt_regs *regs);
diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h
index 71ed5fdf718b..58c294a96676 100644
--- a/arch/arm64/include/asm/fixmap.h
+++ b/arch/arm64/include/asm/fixmap.h
@@ -17,6 +17,7 @@
 
 #ifndef __ASSEMBLY__
 #include <linux/kernel.h>
+#include <linux/math.h>
 #include <linux/sizes.h>
 #include <asm/boot.h>
 #include <asm/page.h>
@@ -36,17 +37,13 @@ enum fixed_addresses {
 	FIX_HOLE,
 
 	/*
-	 * Reserve a virtual window for the FDT that is 2 MB larger than the
-	 * maximum supported size, and put it at the top of the fixmap region.
-	 * The additional space ensures that any FDT that does not exceed
-	 * MAX_FDT_SIZE can be mapped regardless of whether it crosses any
-	 * 2 MB alignment boundaries.
-	 *
-	 * Keep this at the top so it remains 2 MB aligned.
+	 * Reserve a virtual window for the FDT that is a page bigger than the
+	 * maximum supported size. The additional space ensures that any FDT
+	 * that does not exceed MAX_FDT_SIZE can be mapped regardless of
+	 * whether it crosses any page boundary.
 	 */
-#define FIX_FDT_SIZE		(MAX_FDT_SIZE + SZ_2M)
 	FIX_FDT_END,
-	FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
+	FIX_FDT = FIX_FDT_END + DIV_ROUND_UP(MAX_FDT_SIZE, PAGE_SIZE) + 1,
 
 	FIX_EARLYCON_MEM_BASE,
 	FIX_TEXT_POKE0,
@@ -95,12 +92,15 @@ enum fixed_addresses {
 	__end_of_fixed_addresses
 };
 
-#define FIXADDR_SIZE	(__end_of_permanent_fixed_addresses << PAGE_SHIFT)
-#define FIXADDR_START	(FIXADDR_TOP - FIXADDR_SIZE)
+#define FIXADDR_SIZE		(__end_of_permanent_fixed_addresses << PAGE_SHIFT)
+#define FIXADDR_START		(FIXADDR_TOP - FIXADDR_SIZE)
+#define FIXADDR_TOT_SIZE	(__end_of_fixed_addresses << PAGE_SHIFT)
+#define FIXADDR_TOT_START	(FIXADDR_TOP - FIXADDR_TOT_SIZE)
 
 #define FIXMAP_PAGE_IO     __pgprot(PROT_DEVICE_nGnRE)
 
 void __init early_fixmap_init(void);
+void __init fixmap_copy(pgd_t *pgdir);
 
 #define __early_set_fixmap __set_fixmap
 
diff --git a/arch/arm64/include/asm/ftrace.h b/arch/arm64/include/asm/ftrace.h
index 1c2672bbbf37..b87d70b693c6 100644
--- a/arch/arm64/include/asm/ftrace.h
+++ b/arch/arm64/include/asm/ftrace.h
@@ -70,10 +70,19 @@ struct ftrace_ops;
 
 #define arch_ftrace_get_regs(regs) NULL
 
+/*
+ * Note: sizeof(struct ftrace_regs) must be a multiple of 16 to ensure correct
+ * stack alignment
+ */
 struct ftrace_regs {
 	/* x0 - x8 */
 	unsigned long regs[9];
+
+#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
+	unsigned long direct_tramp;
+#else
 	unsigned long __unused;
+#endif
 
 	unsigned long fp;
 	unsigned long lr;
@@ -136,6 +145,19 @@ int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
 		       struct ftrace_ops *op, struct ftrace_regs *fregs);
 #define ftrace_graph_func ftrace_graph_func
+
+#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
+static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs,
+						 unsigned long addr)
+{
+	/*
+	 * The ftrace trampoline will return to this address instead of the
+	 * instrumented function.
+	 */
+	fregs->direct_tramp = addr;
+}
+#endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */
+
 #endif
 
 #define ftrace_return_address(n) return_address(n)
diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h
index fcd14197756f..186dd7f85b14 100644
--- a/arch/arm64/include/asm/kernel-pgtable.h
+++ b/arch/arm64/include/asm/kernel-pgtable.h
@@ -59,8 +59,11 @@
 #define EARLY_KASLR	(0)
 #endif
 
+#define SPAN_NR_ENTRIES(vstart, vend, shift) \
+	((((vend) - 1) >> (shift)) - ((vstart) >> (shift)) + 1)
+
 #define EARLY_ENTRIES(vstart, vend, shift, add) \
-	((((vend) - 1) >> (shift)) - ((vstart) >> (shift)) + 1 + add)
+	(SPAN_NR_ENTRIES(vstart, vend, shift) + (add))
 
 #define EARLY_PGDS(vstart, vend, add) (EARLY_ENTRIES(vstart, vend, PGDIR_SHIFT, add))
 
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
index 559bfae26715..9ac9572a3bbe 100644
--- a/arch/arm64/include/asm/kexec.h
+++ b/arch/arm64/include/asm/kexec.h
@@ -102,12 +102,6 @@ void cpu_soft_restart(unsigned long el2_switch, unsigned long entry,
 
 int machine_kexec_post_load(struct kimage *image);
 #define machine_kexec_post_load machine_kexec_post_load
-
-void arch_kexec_protect_crashkres(void);
-#define arch_kexec_protect_crashkres arch_kexec_protect_crashkres
-
-void arch_kexec_unprotect_crashkres(void);
-#define arch_kexec_unprotect_crashkres arch_kexec_unprotect_crashkres
 #endif
 
 #define ARCH_HAS_KIMAGE_ARCH
diff --git a/arch/arm64/include/asm/kfence.h b/arch/arm64/include/asm/kfence.h
index aa855c6a0ae6..a81937fae9f6 100644
--- a/arch/arm64/include/asm/kfence.h
+++ b/arch/arm64/include/asm/kfence.h
@@ -19,4 +19,14 @@ static inline bool kfence_protect_page(unsigned long addr, bool protect)
 	return true;
 }
 
+#ifdef CONFIG_KFENCE
+extern bool kfence_early_init;
+static inline bool arm64_kfence_can_set_direct_map(void)
+{
+	return !kfence_early_init;
+}
+#else /* CONFIG_KFENCE */
+static inline bool arm64_kfence_can_set_direct_map(void) { return false; }
+#endif /* CONFIG_KFENCE */
+
 #endif /* __ASM_KFENCE_H */
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 78e5163836a0..efcd68154a3a 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -374,11 +374,6 @@ static inline void *phys_to_virt(phys_addr_t x)
 })
 
 void dump_mem_limit(void);
-
-static inline bool defer_reserve_crashkernel(void)
-{
-	return IS_ENABLED(CONFIG_ZONE_DMA) || IS_ENABLED(CONFIG_ZONE_DMA32);
-}
 #endif /* !ASSEMBLY */
 
 /*
diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h
index 48f8466a4be9..4384eaa0aeb7 100644
--- a/arch/arm64/include/asm/mmu.h
+++ b/arch/arm64/include/asm/mmu.h
@@ -65,6 +65,8 @@ extern void paging_init(void);
 extern void bootmem_init(void);
 extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
 extern void init_mem_pgprot(void);
+extern void create_mapping_noalloc(phys_addr_t phys, unsigned long virt,
+				   phys_addr_t size, pgprot_t prot);
 extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
 			       unsigned long virt, phys_addr_t size,
 			       pgprot_t prot, bool page_mappings_only);
diff --git a/arch/arm64/include/asm/perf_event.h b/arch/arm64/include/asm/perf_event.h
index 3eaf462f5752..eb7071c9eb34 100644
--- a/arch/arm64/include/asm/perf_event.h
+++ b/arch/arm64/include/asm/perf_event.h
@@ -9,255 +9,6 @@
 #include <asm/stack_pointer.h>
 #include <asm/ptrace.h>
 
-#define	ARMV8_PMU_MAX_COUNTERS	32
-#define	ARMV8_PMU_COUNTER_MASK	(ARMV8_PMU_MAX_COUNTERS - 1)
-
-/*
- * Common architectural and microarchitectural event numbers.
- */
-#define ARMV8_PMUV3_PERFCTR_SW_INCR				0x0000
-#define ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL			0x0001
-#define ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL			0x0002
-#define ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL			0x0003
-#define ARMV8_PMUV3_PERFCTR_L1D_CACHE				0x0004
-#define ARMV8_PMUV3_PERFCTR_L1D_TLB_REFILL			0x0005
-#define ARMV8_PMUV3_PERFCTR_LD_RETIRED				0x0006
-#define ARMV8_PMUV3_PERFCTR_ST_RETIRED				0x0007
-#define ARMV8_PMUV3_PERFCTR_INST_RETIRED			0x0008
-#define ARMV8_PMUV3_PERFCTR_EXC_TAKEN				0x0009
-#define ARMV8_PMUV3_PERFCTR_EXC_RETURN				0x000A
-#define ARMV8_PMUV3_PERFCTR_CID_WRITE_RETIRED			0x000B
-#define ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED			0x000C
-#define ARMV8_PMUV3_PERFCTR_BR_IMMED_RETIRED			0x000D
-#define ARMV8_PMUV3_PERFCTR_BR_RETURN_RETIRED			0x000E
-#define ARMV8_PMUV3_PERFCTR_UNALIGNED_LDST_RETIRED		0x000F
-#define ARMV8_PMUV3_PERFCTR_BR_MIS_PRED				0x0010
-#define ARMV8_PMUV3_PERFCTR_CPU_CYCLES				0x0011
-#define ARMV8_PMUV3_PERFCTR_BR_PRED				0x0012
-#define ARMV8_PMUV3_PERFCTR_MEM_ACCESS				0x0013
-#define ARMV8_PMUV3_PERFCTR_L1I_CACHE				0x0014
-#define ARMV8_PMUV3_PERFCTR_L1D_CACHE_WB			0x0015
-#define ARMV8_PMUV3_PERFCTR_L2D_CACHE				0x0016
-#define ARMV8_PMUV3_PERFCTR_L2D_CACHE_REFILL			0x0017
-#define ARMV8_PMUV3_PERFCTR_L2D_CACHE_WB			0x0018
-#define ARMV8_PMUV3_PERFCTR_BUS_ACCESS				0x0019
-#define ARMV8_PMUV3_PERFCTR_MEMORY_ERROR			0x001A
-#define ARMV8_PMUV3_PERFCTR_INST_SPEC				0x001B
-#define ARMV8_PMUV3_PERFCTR_TTBR_WRITE_RETIRED			0x001C
-#define ARMV8_PMUV3_PERFCTR_BUS_CYCLES				0x001D
-#define ARMV8_PMUV3_PERFCTR_CHAIN				0x001E
-#define ARMV8_PMUV3_PERFCTR_L1D_CACHE_ALLOCATE			0x001F
-#define ARMV8_PMUV3_PERFCTR_L2D_CACHE_ALLOCATE			0x0020
-#define ARMV8_PMUV3_PERFCTR_BR_RETIRED				0x0021
-#define ARMV8_PMUV3_PERFCTR_BR_MIS_PRED_RETIRED			0x0022
-#define ARMV8_PMUV3_PERFCTR_STALL_FRONTEND			0x0023
-#define ARMV8_PMUV3_PERFCTR_STALL_BACKEND			0x0024
-#define ARMV8_PMUV3_PERFCTR_L1D_TLB				0x0025
-#define ARMV8_PMUV3_PERFCTR_L1I_TLB				0x0026
-#define ARMV8_PMUV3_PERFCTR_L2I_CACHE				0x0027
-#define ARMV8_PMUV3_PERFCTR_L2I_CACHE_REFILL			0x0028
-#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_ALLOCATE			0x0029
-#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_REFILL			0x002A
-#define ARMV8_PMUV3_PERFCTR_L3D_CACHE				0x002B
-#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_WB			0x002C
-#define ARMV8_PMUV3_PERFCTR_L2D_TLB_REFILL			0x002D
-#define ARMV8_PMUV3_PERFCTR_L2I_TLB_REFILL			0x002E
-#define ARMV8_PMUV3_PERFCTR_L2D_TLB				0x002F
-#define ARMV8_PMUV3_PERFCTR_L2I_TLB				0x0030
-#define ARMV8_PMUV3_PERFCTR_REMOTE_ACCESS			0x0031
-#define ARMV8_PMUV3_PERFCTR_LL_CACHE				0x0032
-#define ARMV8_PMUV3_PERFCTR_LL_CACHE_MISS			0x0033
-#define ARMV8_PMUV3_PERFCTR_DTLB_WALK				0x0034
-#define ARMV8_PMUV3_PERFCTR_ITLB_WALK				0x0035
-#define ARMV8_PMUV3_PERFCTR_LL_CACHE_RD				0x0036
-#define ARMV8_PMUV3_PERFCTR_LL_CACHE_MISS_RD			0x0037
-#define ARMV8_PMUV3_PERFCTR_REMOTE_ACCESS_RD			0x0038
-#define ARMV8_PMUV3_PERFCTR_L1D_CACHE_LMISS_RD			0x0039
-#define ARMV8_PMUV3_PERFCTR_OP_RETIRED				0x003A
-#define ARMV8_PMUV3_PERFCTR_OP_SPEC				0x003B
-#define ARMV8_PMUV3_PERFCTR_STALL				0x003C
-#define ARMV8_PMUV3_PERFCTR_STALL_SLOT_BACKEND			0x003D
-#define ARMV8_PMUV3_PERFCTR_STALL_SLOT_FRONTEND			0x003E
-#define ARMV8_PMUV3_PERFCTR_STALL_SLOT				0x003F
-
-/* Statistical profiling extension microarchitectural events */
-#define	ARMV8_SPE_PERFCTR_SAMPLE_POP				0x4000
-#define	ARMV8_SPE_PERFCTR_SAMPLE_FEED				0x4001
-#define	ARMV8_SPE_PERFCTR_SAMPLE_FILTRATE			0x4002
-#define	ARMV8_SPE_PERFCTR_SAMPLE_COLLISION			0x4003
-
-/* AMUv1 architecture events */
-#define	ARMV8_AMU_PERFCTR_CNT_CYCLES				0x4004
-#define	ARMV8_AMU_PERFCTR_STALL_BACKEND_MEM			0x4005
-
-/* long-latency read miss events */
-#define	ARMV8_PMUV3_PERFCTR_L1I_CACHE_LMISS			0x4006
-#define	ARMV8_PMUV3_PERFCTR_L2D_CACHE_LMISS_RD			0x4009
-#define	ARMV8_PMUV3_PERFCTR_L2I_CACHE_LMISS			0x400A
-#define	ARMV8_PMUV3_PERFCTR_L3D_CACHE_LMISS_RD			0x400B
-
-/* Trace buffer events */
-#define ARMV8_PMUV3_PERFCTR_TRB_WRAP				0x400C
-#define ARMV8_PMUV3_PERFCTR_TRB_TRIG				0x400E
-
-/* Trace unit events */
-#define ARMV8_PMUV3_PERFCTR_TRCEXTOUT0				0x4010
-#define ARMV8_PMUV3_PERFCTR_TRCEXTOUT1				0x4011
-#define ARMV8_PMUV3_PERFCTR_TRCEXTOUT2				0x4012
-#define ARMV8_PMUV3_PERFCTR_TRCEXTOUT3				0x4013
-#define ARMV8_PMUV3_PERFCTR_CTI_TRIGOUT4			0x4018
-#define ARMV8_PMUV3_PERFCTR_CTI_TRIGOUT5			0x4019
-#define ARMV8_PMUV3_PERFCTR_CTI_TRIGOUT6			0x401A
-#define ARMV8_PMUV3_PERFCTR_CTI_TRIGOUT7			0x401B
-
-/* additional latency from alignment events */
-#define	ARMV8_PMUV3_PERFCTR_LDST_ALIGN_LAT			0x4020
-#define	ARMV8_PMUV3_PERFCTR_LD_ALIGN_LAT			0x4021
-#define	ARMV8_PMUV3_PERFCTR_ST_ALIGN_LAT			0x4022
-
-/* Armv8.5 Memory Tagging Extension events */
-#define	ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED			0x4024
-#define	ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED_RD			0x4025
-#define	ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED_WR			0x4026
-
-/* ARMv8 recommended implementation defined event types */
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD			0x0040
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR			0x0041
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD		0x0042
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR		0x0043
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_INNER		0x0044
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_OUTER		0x0045
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WB_VICTIM		0x0046
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WB_CLEAN			0x0047
-#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_INVAL			0x0048
-
-#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD			0x004C
-#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR			0x004D
-#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD				0x004E
-#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR				0x004F
-#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_RD			0x0050
-#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_WR			0x0051
-#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_REFILL_RD		0x0052
-#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_REFILL_WR		0x0053
-
-#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_WB_VICTIM		0x0056
-#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_WB_CLEAN			0x0057
-#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_INVAL			0x0058
-
-#define ARMV8_IMPDEF_PERFCTR_L2D_TLB_REFILL_RD			0x005C
-#define ARMV8_IMPDEF_PERFCTR_L2D_TLB_REFILL_WR			0x005D
-#define ARMV8_IMPDEF_PERFCTR_L2D_TLB_RD				0x005E
-#define ARMV8_IMPDEF_PERFCTR_L2D_TLB_WR				0x005F
-#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD			0x0060
-#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR			0x0061
-#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_SHARED			0x0062
-#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_NOT_SHARED		0x0063
-#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_NORMAL			0x0064
-#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_PERIPH			0x0065
-#define ARMV8_IMPDEF_PERFCTR_MEM_ACCESS_RD			0x0066
-#define ARMV8_IMPDEF_PERFCTR_MEM_ACCESS_WR			0x0067
-#define ARMV8_IMPDEF_PERFCTR_UNALIGNED_LD_SPEC			0x0068
-#define ARMV8_IMPDEF_PERFCTR_UNALIGNED_ST_SPEC			0x0069
-#define ARMV8_IMPDEF_PERFCTR_UNALIGNED_LDST_SPEC		0x006A
-
-#define ARMV8_IMPDEF_PERFCTR_LDREX_SPEC				0x006C
-#define ARMV8_IMPDEF_PERFCTR_STREX_PASS_SPEC			0x006D
-#define ARMV8_IMPDEF_PERFCTR_STREX_FAIL_SPEC			0x006E
-#define ARMV8_IMPDEF_PERFCTR_STREX_SPEC				0x006F
-#define ARMV8_IMPDEF_PERFCTR_LD_SPEC				0x0070
-#define ARMV8_IMPDEF_PERFCTR_ST_SPEC				0x0071
-#define ARMV8_IMPDEF_PERFCTR_LDST_SPEC				0x0072
-#define ARMV8_IMPDEF_PERFCTR_DP_SPEC				0x0073
-#define ARMV8_IMPDEF_PERFCTR_ASE_SPEC				0x0074
-#define ARMV8_IMPDEF_PERFCTR_VFP_SPEC				0x0075
-#define ARMV8_IMPDEF_PERFCTR_PC_WRITE_SPEC			0x0076
-#define ARMV8_IMPDEF_PERFCTR_CRYPTO_SPEC			0x0077
-#define ARMV8_IMPDEF_PERFCTR_BR_IMMED_SPEC			0x0078
-#define ARMV8_IMPDEF_PERFCTR_BR_RETURN_SPEC			0x0079
-#define ARMV8_IMPDEF_PERFCTR_BR_INDIRECT_SPEC			0x007A
-
-#define ARMV8_IMPDEF_PERFCTR_ISB_SPEC				0x007C
-#define ARMV8_IMPDEF_PERFCTR_DSB_SPEC				0x007D
-#define ARMV8_IMPDEF_PERFCTR_DMB_SPEC				0x007E
-
-#define ARMV8_IMPDEF_PERFCTR_EXC_UNDEF				0x0081
-#define ARMV8_IMPDEF_PERFCTR_EXC_SVC				0x0082
-#define ARMV8_IMPDEF_PERFCTR_EXC_PABORT				0x0083
-#define ARMV8_IMPDEF_PERFCTR_EXC_DABORT				0x0084
-
-#define ARMV8_IMPDEF_PERFCTR_EXC_IRQ				0x0086
-#define ARMV8_IMPDEF_PERFCTR_EXC_FIQ				0x0087
-#define ARMV8_IMPDEF_PERFCTR_EXC_SMC				0x0088
-
-#define ARMV8_IMPDEF_PERFCTR_EXC_HVC				0x008A
-#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_PABORT			0x008B
-#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_DABORT			0x008C
-#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_OTHER			0x008D
-#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_IRQ			0x008E
-#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_FIQ			0x008F
-#define ARMV8_IMPDEF_PERFCTR_RC_LD_SPEC				0x0090
-#define ARMV8_IMPDEF_PERFCTR_RC_ST_SPEC				0x0091
-
-#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_RD			0x00A0
-#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_WR			0x00A1
-#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_REFILL_RD		0x00A2
-#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_REFILL_WR		0x00A3
-
-#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_WB_VICTIM		0x00A6
-#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_WB_CLEAN			0x00A7
-#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_INVAL			0x00A8
-
-/*
- * Per-CPU PMCR: config reg
- */
-#define ARMV8_PMU_PMCR_E	(1 << 0) /* Enable all counters */
-#define ARMV8_PMU_PMCR_P	(1 << 1) /* Reset all counters */
-#define ARMV8_PMU_PMCR_C	(1 << 2) /* Cycle counter reset */
-#define ARMV8_PMU_PMCR_D	(1 << 3) /* CCNT counts every 64th cpu cycle */
-#define ARMV8_PMU_PMCR_X	(1 << 4) /* Export to ETM */
-#define ARMV8_PMU_PMCR_DP	(1 << 5) /* Disable CCNT if non-invasive debug*/
-#define ARMV8_PMU_PMCR_LC	(1 << 6) /* Overflow on 64 bit cycle counter */
-#define ARMV8_PMU_PMCR_LP	(1 << 7) /* Long event counter enable */
-#define	ARMV8_PMU_PMCR_N_SHIFT	11	 /* Number of counters supported */
-#define	ARMV8_PMU_PMCR_N_MASK	0x1f
-#define	ARMV8_PMU_PMCR_MASK	0xff	 /* Mask for writable bits */
-
-/*
- * PMOVSR: counters overflow flag status reg
- */
-#define	ARMV8_PMU_OVSR_MASK		0xffffffff	/* Mask for writable bits */
-#define	ARMV8_PMU_OVERFLOWED_MASK	ARMV8_PMU_OVSR_MASK
-
-/*
- * PMXEVTYPER: Event selection reg
- */
-#define	ARMV8_PMU_EVTYPE_MASK	0xc800ffff	/* Mask for writable bits */
-#define	ARMV8_PMU_EVTYPE_EVENT	0xffff		/* Mask for EVENT bits */
-
-/*
- * Event filters for PMUv3
- */
-#define	ARMV8_PMU_EXCLUDE_EL1	(1U << 31)
-#define	ARMV8_PMU_EXCLUDE_EL0	(1U << 30)
-#define	ARMV8_PMU_INCLUDE_EL2	(1U << 27)
-
-/*
- * PMUSERENR: user enable reg
- */
-#define ARMV8_PMU_USERENR_MASK	0xf		/* Mask for writable bits */
-#define ARMV8_PMU_USERENR_EN	(1 << 0) /* PMU regs can be accessed at EL0 */
-#define ARMV8_PMU_USERENR_SW	(1 << 1) /* PMSWINC can be written at EL0 */
-#define ARMV8_PMU_USERENR_CR	(1 << 2) /* Cycle counter can be read at EL0 */
-#define ARMV8_PMU_USERENR_ER	(1 << 3) /* Event counter can be read at EL0 */
-
-/* PMMIR_EL1.SLOTS mask */
-#define ARMV8_PMU_SLOTS_MASK	0xff
-
-#define ARMV8_PMU_BUS_SLOTS_SHIFT 8
-#define ARMV8_PMU_BUS_SLOTS_MASK 0xff
-#define ARMV8_PMU_BUS_WIDTH_SHIFT 16
-#define ARMV8_PMU_BUS_WIDTH_MASK 0xf
-
 #ifdef CONFIG_PERF_EVENTS
 struct pt_regs;
 extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
diff --git a/arch/arm64/include/asm/pointer_auth.h b/arch/arm64/include/asm/pointer_auth.h
index efb098de3a84..d2e0306e65d3 100644
--- a/arch/arm64/include/asm/pointer_auth.h
+++ b/arch/arm64/include/asm/pointer_auth.h
@@ -10,6 +10,13 @@
 #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)
 
@@ -97,11 +104,6 @@ extern int ptrauth_set_enabled_keys(struct task_struct *tsk, unsigned long keys,
 				    unsigned long enabled);
 extern int ptrauth_get_enabled_keys(struct task_struct *tsk);
 
-static inline unsigned long ptrauth_strip_insn_pac(unsigned long ptr)
-{
-	return ptrauth_clear_pac(ptr);
-}
-
 static __always_inline void ptrauth_enable(void)
 {
 	if (!system_supports_address_auth())
@@ -133,7 +135,6 @@ static __always_inline void ptrauth_enable(void)
 #define ptrauth_prctl_reset_keys(tsk, arg)	(-EINVAL)
 #define ptrauth_set_enabled_keys(tsk, keys, enabled)	(-EINVAL)
 #define ptrauth_get_enabled_keys(tsk)	(-EINVAL)
-#define ptrauth_strip_insn_pac(lr)	(lr)
 #define ptrauth_suspend_exit()
 #define ptrauth_thread_init_user()
 #define ptrauth_thread_switch_user(tsk)
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 9e3ecba3c4e6..c48b41c9b0cc 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -419,9 +419,6 @@
 #define SYS_MDCR_EL2			sys_reg(3, 4, 1, 1, 1)
 #define SYS_CPTR_EL2			sys_reg(3, 4, 1, 1, 2)
 #define SYS_HSTR_EL2			sys_reg(3, 4, 1, 1, 3)
-#define SYS_HFGRTR_EL2			sys_reg(3, 4, 1, 1, 4)
-#define SYS_HFGWTR_EL2			sys_reg(3, 4, 1, 1, 5)
-#define SYS_HFGITR_EL2			sys_reg(3, 4, 1, 1, 6)
 #define SYS_HACR_EL2			sys_reg(3, 4, 1, 1, 7)
 
 #define SYS_TTBR0_EL2			sys_reg(3, 4, 2, 0, 0)
@@ -758,12 +755,6 @@
 #define ICH_VTR_TDS_SHIFT	19
 #define ICH_VTR_TDS_MASK	(1 << ICH_VTR_TDS_SHIFT)
 
-/* HFG[WR]TR_EL2 bit definitions */
-#define HFGxTR_EL2_nTPIDR2_EL0_SHIFT	55
-#define HFGxTR_EL2_nTPIDR2_EL0_MASK	BIT_MASK(HFGxTR_EL2_nTPIDR2_EL0_SHIFT)
-#define HFGxTR_EL2_nSMPRI_EL1_SHIFT	54
-#define HFGxTR_EL2_nSMPRI_EL1_MASK	BIT_MASK(HFGxTR_EL2_nSMPRI_EL1_SHIFT)
-
 #define ARM64_FEATURE_FIELD_BITS	4
 
 /* Defined for compatibility only, do not add new users. */
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index 5c7b2f9d5913..8209e6a86989 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -237,7 +237,7 @@ static inline void __user *__uaccess_mask_ptr(const void __user *ptr)
 	"1:	" load "	" reg "1, [%2]\n"			\
 	"2:\n"								\
 	_ASM_EXTABLE_##type##ACCESS_ERR_ZERO(1b, 2b, %w0, %w1)		\
-	: "+r" (err), "=&r" (x)						\
+	: "+r" (err), "=r" (x)						\
 	: "r" (addr))
 
 #define __raw_get_mem(ldr, x, ptr, err, type)					\
@@ -327,7 +327,7 @@ do {									\
 	"2:\n"								\
 	_ASM_EXTABLE_##type##ACCESS_ERR(1b, 2b, %w0)			\
 	: "+r" (err)							\
-	: "r" (x), "r" (addr))
+	: "rZ" (x), "r" (addr))
 
 #define __raw_put_mem(str, x, ptr, err, type)					\
 do {										\
@@ -449,8 +449,6 @@ extern long strncpy_from_user(char *dest, const char __user *src, long count);
 extern __must_check long strnlen_user(const char __user *str, long n);
 
 #ifdef CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE
-struct page;
-void memcpy_page_flushcache(char *to, struct page *page, size_t offset, size_t len);
 extern unsigned long __must_check __copy_user_flushcache(void *to, const void __user *from, unsigned long n);
 
 static inline int __copy_from_user_flushcache(void *dst, const void __user *src, unsigned size)