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

Pull arm64 fixes from Catalin Marinas:
 "Various arm64 fixes:
   - ftrace branch generation fix
   - branch instruction encoding fix
   - include files, guards and unused prototypes clean-up
   - minor VDSO ABI fix (clock_getres)
   - PSCI functions moved to .S to avoid compilation error with gcc 5
   - pte_modify fix to not ignore the mapping type
   - crypto: AES interleaved increased to 4x (for performance reasons)
   - text patching fix for modules
   - swiotlb increased back to 64MB
   - copy_siginfo_to_user32() fix for big endian"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: cpuidle: add asm/proc-fns.h inclusion
  arm64: compat Fix siginfo_t -> compat_siginfo_t conversion on big endian
  arm64: Increase the swiotlb buffer size 64MB
  arm64: Fix text patching logic when using fixmap
  arm64: crypto: increase AES interleave to 4x
  arm64: enable PTE type bit in the mask for pte_modify
  arm64: mm: remove unused functions and variable protoypes
  arm64: psci: move psci firmware calls out of line
  arm64: vdso: minor ABI fix for clock_getres
  arm64: guard asm/assembler.h against multiple inclusions
  arm64: insn: fix compare-and-branch encodings
  arm64: ftrace: fix ftrace_modify_graph_caller for branch replace

arch/arm64/crypto/Makefile

@@ -29,7 +29,7 @@ aes-ce-blk-y := aes-glue-ce.o aes-ce.o
 obj-$(CONFIG_CRYPTO_AES_ARM64_NEON_BLK) += aes-neon-blk.o
 aes-neon-blk-y := aes-glue-neon.o aes-neon.o
 
-AFLAGS_aes-ce.o		:= -DINTERLEAVE=2 -DINTERLEAVE_INLINE
+AFLAGS_aes-ce.o		:= -DINTERLEAVE=4
 AFLAGS_aes-neon.o	:= -DINTERLEAVE=4
 
 CFLAGS_aes-glue-ce.o	:= -DUSE_V8_CRYPTO_EXTENSIONS

arch/arm64/include/asm/assembler.h

@@ -20,6 +20,9 @@
 #error "Only include this from assembly code"
 #endif
 
+#ifndef __ASM_ASSEMBLER_H
+#define __ASM_ASSEMBLER_H
+
 #include <asm/ptrace.h>
 #include <asm/thread_info.h>
 
@@ -155,3 +158,5 @@ lr	.req	x30		// link register
 #endif
 	orr	\rd, \lbits, \hbits, lsl #32
 	.endm
+
+#endif	/* __ASM_ASSEMBLER_H */

arch/arm64/include/asm/cpuidle.h

@@ -1,6 +1,8 @@
 #ifndef __ASM_CPUIDLE_H
 #define __ASM_CPUIDLE_H
 
+#include <asm/proc-fns.h>
+
 #ifdef CONFIG_CPU_IDLE
 extern int cpu_init_idle(unsigned int cpu);
 extern int cpu_suspend(unsigned long arg);

arch/arm64/include/asm/insn.h

@@ -264,8 +264,10 @@ __AARCH64_INSN_FUNCS(ands,	0x7F200000, 0x6A000000)
 __AARCH64_INSN_FUNCS(bics,	0x7F200000, 0x6A200000)
 __AARCH64_INSN_FUNCS(b,		0xFC000000, 0x14000000)
 __AARCH64_INSN_FUNCS(bl,	0xFC000000, 0x94000000)
-__AARCH64_INSN_FUNCS(cbz,	0xFE000000, 0x34000000)
-__AARCH64_INSN_FUNCS(cbnz,	0xFE000000, 0x35000000)
+__AARCH64_INSN_FUNCS(cbz,	0x7F000000, 0x34000000)
+__AARCH64_INSN_FUNCS(cbnz,	0x7F000000, 0x35000000)
+__AARCH64_INSN_FUNCS(tbz,	0x7F000000, 0x36000000)
+__AARCH64_INSN_FUNCS(tbnz,	0x7F000000, 0x37000000)
 __AARCH64_INSN_FUNCS(bcond,	0xFF000010, 0x54000000)
 __AARCH64_INSN_FUNCS(svc,	0xFFE0001F, 0xD4000001)
 __AARCH64_INSN_FUNCS(hvc,	0xFFE0001F, 0xD4000002)

arch/arm64/include/asm/pgtable.h

@@ -460,7 +460,7 @@ static inline pud_t *pud_offset(pgd_t *pgd, unsigned long addr)
 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 {
 	const pteval_t mask = PTE_USER | PTE_PXN | PTE_UXN | PTE_RDONLY |
-			      PTE_PROT_NONE | PTE_VALID | PTE_WRITE;
+			      PTE_PROT_NONE | PTE_WRITE | PTE_TYPE_MASK;
 	pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask);
 	return pte;
 }

arch/arm64/include/asm/processor.h

@@ -45,7 +45,8 @@
 #define STACK_TOP		STACK_TOP_MAX
 #endif /* CONFIG_COMPAT */
 
-#define ARCH_LOW_ADDRESS_LIMIT	PHYS_MASK
+extern phys_addr_t arm64_dma_phys_limit;
+#define ARCH_LOW_ADDRESS_LIMIT	(arm64_dma_phys_limit - 1)
 #endif /* __KERNEL__ */
 
 struct debug_info {

arch/arm64/include/asm/tlbflush.h

@@ -24,11 +24,6 @@
 #include <linux/sched.h>
 #include <asm/cputype.h>
 
-extern void __cpu_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
-extern void __cpu_flush_kern_tlb_range(unsigned long, unsigned long);
-
-extern struct cpu_tlb_fns cpu_tlb;
-
 /*
  *	TLB Management
  *	==============

arch/arm64/kernel/Makefile

@@ -15,8 +15,9 @@ CFLAGS_REMOVE_return_address.o = -pg
 arm64-obj-y		:= cputable.o debug-monitors.o entry.o irq.o fpsimd.o	\
 			   entry-fpsimd.o process.o ptrace.o setup.o signal.o	\
 			   sys.o stacktrace.o time.o traps.o io.o vdso.o	\
-			   hyp-stub.o psci.o cpu_ops.o insn.o return_address.o	\
-			   cpuinfo.o cpu_errata.o alternative.o cacheinfo.o
+			   hyp-stub.o psci.o psci-call.o cpu_ops.o insn.o	\
+			   return_address.o cpuinfo.o cpu_errata.o		\
+			   alternative.o cacheinfo.o
 
 arm64-obj-$(CONFIG_COMPAT)		+= sys32.o kuser32.o signal32.o 	\
 					   sys_compat.o entry32.o		\

arch/arm64/kernel/ftrace.c

@@ -156,7 +156,7 @@ static int ftrace_modify_graph_caller(bool enable)
 
 	branch = aarch64_insn_gen_branch_imm(pc,
 					     (unsigned long)ftrace_graph_caller,
-					     AARCH64_INSN_BRANCH_LINK);
+					     AARCH64_INSN_BRANCH_NOLINK);
 	nop = aarch64_insn_gen_nop();
 
 	if (enable)

arch/arm64/kernel/insn.c

@@ -87,8 +87,10 @@ static void __kprobes *patch_map(void *addr, int fixmap)
 
 	if (module && IS_ENABLED(CONFIG_DEBUG_SET_MODULE_RONX))
 		page = vmalloc_to_page(addr);
-	else
+	else if (!module && IS_ENABLED(CONFIG_DEBUG_RODATA))
 		page = virt_to_page(addr);
+	else
+		return addr;
 
 	BUG_ON(!page);
 	set_fixmap(fixmap, page_to_phys(page));

arch/arm64/kernel/psci-call.S

@@ -0,0 +1,28 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Copyright (C) 2015 ARM Limited
+ *
+ * Author: Will Deacon <will.deacon@arm.com>
+ */
+
+#include <linux/linkage.h>
+
+/* int __invoke_psci_fn_hvc(u64 function_id, u64 arg0, u64 arg1, u64 arg2) */
+ENTRY(__invoke_psci_fn_hvc)
+	hvc	#0
+	ret
+ENDPROC(__invoke_psci_fn_hvc)
+
+/* int __invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1, u64 arg2) */
+ENTRY(__invoke_psci_fn_smc)
+	smc	#0
+	ret
+ENDPROC(__invoke_psci_fn_smc)

arch/arm64/kernel/psci.c

@@ -57,6 +57,9 @@ static struct psci_operations psci_ops;
 static int (*invoke_psci_fn)(u64, u64, u64, u64);
 typedef int (*psci_initcall_t)(const struct device_node *);
 
+asmlinkage int __invoke_psci_fn_hvc(u64, u64, u64, u64);
+asmlinkage int __invoke_psci_fn_smc(u64, u64, u64, u64);
+
 enum psci_function {
 	PSCI_FN_CPU_SUSPEND,
 	PSCI_FN_CPU_ON,
@@ -109,40 +112,6 @@ static void psci_power_state_unpack(u32 power_state,
 			PSCI_0_2_POWER_STATE_AFFL_SHIFT;
 }
 
-/*
- * The following two functions are invoked via the invoke_psci_fn pointer
- * and will not be inlined, allowing us to piggyback on the AAPCS.
- */
-static noinline int __invoke_psci_fn_hvc(u64 function_id, u64 arg0, u64 arg1,
-					 u64 arg2)
-{
-	asm volatile(
-			__asmeq("%0", "x0")
-			__asmeq("%1", "x1")
-			__asmeq("%2", "x2")
-			__asmeq("%3", "x3")
-			"hvc	#0\n"
-		: "+r" (function_id)
-		: "r" (arg0), "r" (arg1), "r" (arg2));
-
-	return function_id;
-}
-
-static noinline int __invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1,
-					 u64 arg2)
-{
-	asm volatile(
-			__asmeq("%0", "x0")
-			__asmeq("%1", "x1")
-			__asmeq("%2", "x2")
-			__asmeq("%3", "x3")
-			"smc	#0\n"
-		: "+r" (function_id)
-		: "r" (arg0), "r" (arg1), "r" (arg2));
-
-	return function_id;
-}
-
 static int psci_get_version(void)
 {
 	int err;

arch/arm64/kernel/signal32.c

@@ -154,8 +154,7 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
 	case __SI_TIMER:
 		 err |= __put_user(from->si_tid, &to->si_tid);
 		 err |= __put_user(from->si_overrun, &to->si_overrun);
-		 err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr,
-				   &to->si_ptr);
+		 err |= __put_user(from->si_int, &to->si_int);
 		break;
 	case __SI_POLL:
 		err |= __put_user(from->si_band, &to->si_band);
@@ -184,7 +183,7 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
 	case __SI_MESGQ: /* But this is */
 		err |= __put_user(from->si_pid, &to->si_pid);
 		err |= __put_user(from->si_uid, &to->si_uid);
-		err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr, &to->si_ptr);
+		err |= __put_user(from->si_int, &to->si_int);
 		break;
 	case __SI_SYS:
 		err |= __put_user((compat_uptr_t)(unsigned long)

arch/arm64/kernel/vdso/gettimeofday.S

@@ -174,8 +174,6 @@ ENDPROC(__kernel_clock_gettime)
 /* int __kernel_clock_getres(clockid_t clock_id, struct timespec *res); */
 ENTRY(__kernel_clock_getres)
 	.cfi_startproc
-	cbz	w1, 3f
-
 	cmp	w0, #CLOCK_REALTIME
 	ccmp	w0, #CLOCK_MONOTONIC, #0x4, ne
 	b.ne	1f
@@ -188,6 +186,7 @@ ENTRY(__kernel_clock_getres)
 	b.ne	4f
 	ldr	x2, 6f
 2:
+	cbz	w1, 3f
 	stp	xzr, x2, [x1]
 
 3:	/* res == NULL. */

arch/arm64/mm/dma-mapping.c

@@ -348,8 +348,6 @@ static struct dma_map_ops swiotlb_dma_ops = {
 	.mapping_error = swiotlb_dma_mapping_error,
 };
 
-extern int swiotlb_late_init_with_default_size(size_t default_size);
-
 static int __init atomic_pool_init(void)
 {
 	pgprot_t prot = __pgprot(PROT_NORMAL_NC);
@@ -411,21 +409,13 @@ out:
 	return -ENOMEM;
 }
 
-static int __init swiotlb_late_init(void)
+static int __init arm64_dma_init(void)
 {
-	size_t swiotlb_size = min(SZ_64M, MAX_ORDER_NR_PAGES << PAGE_SHIFT);
+	int ret;
 
 	dma_ops = &swiotlb_dma_ops;
 
-	return swiotlb_late_init_with_default_size(swiotlb_size);
-}
-
-static int __init arm64_dma_init(void)
-{
-	int ret = 0;
-
-	ret |= swiotlb_late_init();
-	ret |= atomic_pool_init();
+	ret = atomic_pool_init();
 
 	return ret;
 }

arch/arm64/mm/init.c

@@ -33,6 +33,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/dma-contiguous.h>
 #include <linux/efi.h>
+#include <linux/swiotlb.h>
 
 #include <asm/fixmap.h>
 #include <asm/memory.h>
@@ -45,6 +46,7 @@
 #include "mm.h"
 
 phys_addr_t memstart_addr __read_mostly = 0;
+phys_addr_t arm64_dma_phys_limit __read_mostly;
 
 #ifdef CONFIG_BLK_DEV_INITRD
 static int __init early_initrd(char *p)
@@ -85,7 +87,7 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
 
 	/* 4GB maximum for 32-bit only capable devices */
 	if (IS_ENABLED(CONFIG_ZONE_DMA)) {
-		max_dma = PFN_DOWN(max_zone_dma_phys());
+		max_dma = PFN_DOWN(arm64_dma_phys_limit);
 		zone_size[ZONE_DMA] = max_dma - min;
 	}
 	zone_size[ZONE_NORMAL] = max - max_dma;
@@ -156,8 +158,6 @@ early_param("mem", early_mem);
 
 void __init arm64_memblock_init(void)
 {
-	phys_addr_t dma_phys_limit = 0;
-
 	memblock_enforce_memory_limit(memory_limit);
 
 	/*
@@ -174,8 +174,10 @@ void __init arm64_memblock_init(void)
 
 	/* 4GB maximum for 32-bit only capable devices */
 	if (IS_ENABLED(CONFIG_ZONE_DMA))
-		dma_phys_limit = max_zone_dma_phys();
-	dma_contiguous_reserve(dma_phys_limit);
+		arm64_dma_phys_limit = max_zone_dma_phys();
+	else
+		arm64_dma_phys_limit = PHYS_MASK + 1;
+	dma_contiguous_reserve(arm64_dma_phys_limit);
 
 	memblock_allow_resize();
 	memblock_dump_all();
@@ -276,6 +278,8 @@ static void __init free_unused_memmap(void)
  */
 void __init mem_init(void)
 {
+	swiotlb_init(1);
+
 	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
 
 #ifndef CONFIG_SPARSEMEM_VMEMMAP