5 files changed, 131 insertions, 5 deletions
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index c66c3626a216..3c29c9009bbf 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -24,7 +24,7 @@ endif
 
 obj64-y	+= copypage_64.o copyuser_64.o mem_64.o hweight_64.o \
 	   copyuser_power7.o string_64.o copypage_power7.o memcpy_power7.o \
-	   memcpy_64.o memcmp_64.o
+	   memcpy_64.o memcmp_64.o pmem.o
 
 obj64-$(CONFIG_SMP)	+= locks.o
 obj64-$(CONFIG_ALTIVEC)	+= vmx-helper.o
diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c
index c9de03e0c1f1..d469224c4ada 100644
--- a/arch/powerpc/lib/code-patching.c
+++ b/arch/powerpc/lib/code-patching.c
@@ -21,6 +21,7 @@
 #include <asm/tlbflush.h>
 #include <asm/page.h>
 #include <asm/code-patching.h>
+#include <asm/setup.h>
 
 static int __patch_instruction(unsigned int *addr, unsigned int instr)
 {
@@ -146,11 +147,8 @@ int patch_instruction(unsigned int *addr, unsigned int instr)
 	 * During early early boot patch_instruction is called
 	 * when text_poke_area is not ready, but we still need
 	 * to allow patching. We just do the plain old patching
-	 * We use slab_is_available and per cpu read * via this_cpu_read
-	 * of text_poke_area. Per-CPU areas might not be up early
-	 * this can create problems with just using this_cpu_read()
 	 */
-	if (!slab_is_available() || !this_cpu_read(text_poke_area))
+	if (!this_cpu_read(*PTRRELOC(&text_poke_area)))
 		return __patch_instruction(addr, instr);
 
 	local_irq_save(flags);
diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c
index 41cf5ae273cf..a95ea007d654 100644
--- a/arch/powerpc/lib/feature-fixups.c
+++ b/arch/powerpc/lib/feature-fixups.c
@@ -116,6 +116,47 @@ void do_feature_fixups(unsigned long value, void *fixup_start, void *fixup_end)
 	}
 }
 
+#ifdef CONFIG_PPC_BOOK3S_64
+void do_rfi_flush_fixups(enum l1d_flush_type types)
+{
+	unsigned int instrs[3], *dest;
+	long *start, *end;
+	int i;
+
+	start = PTRRELOC(&__start___rfi_flush_fixup),
+	end = PTRRELOC(&__stop___rfi_flush_fixup);
+
+	instrs[0] = 0x60000000; /* nop */
+	instrs[1] = 0x60000000; /* nop */
+	instrs[2] = 0x60000000; /* nop */
+
+	if (types & L1D_FLUSH_FALLBACK)
+		/* b .+16 to fallback flush */
+		instrs[0] = 0x48000010;
+
+	i = 0;
+	if (types & L1D_FLUSH_ORI) {
+		instrs[i++] = 0x63ff0000; /* ori 31,31,0 speculation barrier */
+		instrs[i++] = 0x63de0000; /* ori 30,30,0 L1d flush*/
+	}
+
+	if (types & L1D_FLUSH_MTTRIG)
+		instrs[i++] = 0x7c12dba6; /* mtspr TRIG2,r0 (SPR #882) */
+
+	for (i = 0; start < end; start++, i++) {
+		dest = (void *)start + *start;
+
+		pr_devel("patching dest %lx\n", (unsigned long)dest);
+
+		patch_instruction(dest, instrs[0]);
+		patch_instruction(dest + 1, instrs[1]);
+		patch_instruction(dest + 2, instrs[2]);
+	}
+
+	printk(KERN_DEBUG "rfi-flush: patched %d locations\n", i);
+}
+#endif /* CONFIG_PPC_BOOK3S_64 */
+
 void do_lwsync_fixups(unsigned long value, void *fixup_start, void *fixup_end)
 {
 	long *start, *end;
diff --git a/arch/powerpc/lib/pmem.c b/arch/powerpc/lib/pmem.c
new file mode 100644
index 000000000000..53c018762e1c
--- /dev/null
+++ b/arch/powerpc/lib/pmem.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright(c) 2017 IBM Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License 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.
+ */
+
+#include <linux/string.h>
+#include <linux/export.h>
+#include <linux/uaccess.h>
+
+#include <asm/cacheflush.h>
+
+/*
+ * CONFIG_ARCH_HAS_PMEM_API symbols
+ */
+void arch_wb_cache_pmem(void *addr, size_t size)
+{
+	unsigned long start = (unsigned long) addr;
+	flush_inval_dcache_range(start, start + size);
+}
+EXPORT_SYMBOL(arch_wb_cache_pmem);
+
+void arch_invalidate_pmem(void *addr, size_t size)
+{
+	unsigned long start = (unsigned long) addr;
+	flush_inval_dcache_range(start, start + size);
+}
+EXPORT_SYMBOL(arch_invalidate_pmem);
+
+/*
+ * CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE symbols
+ */
+long __copy_from_user_flushcache(void *dest, const void __user *src,
+		unsigned size)
+{
+	unsigned long copied, start = (unsigned long) dest;
+
+	copied = __copy_from_user(dest, src, size);
+	flush_inval_dcache_range(start, start + size);
+
+	return copied;
+}
+
+void *memcpy_flushcache(void *dest, const void *src, size_t size)
+{
+	unsigned long start = (unsigned long) dest;
+
+	memcpy(dest, src, size);
+	flush_inval_dcache_range(start, start + size);
+
+	return dest;
+}
+EXPORT_SYMBOL(memcpy_flushcache);
+
+void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
+	size_t len)
+{
+	memcpy_flushcache(to, page_to_virt(page) + offset, len);
+}
+EXPORT_SYMBOL(memcpy_page_flushcache);
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index f208f560aecd..70274b7b4773 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -31,6 +31,8 @@ extern char system_call_common[];
 #define XER_SO		0x80000000U
 #define XER_OV		0x40000000U
 #define XER_CA		0x20000000U
+#define XER_OV32	0x00080000U
+#define XER_CA32	0x00040000U
 
 #ifdef CONFIG_PPC_FPU
 /*
@@ -962,6 +964,16 @@ static nokprobe_inline void set_cr0(const struct pt_regs *regs,
 		op->ccval |= 0x20000000;
 }
 
+static nokprobe_inline void set_ca32(struct instruction_op *op, bool val)
+{
+	if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+		if (val)
+			op->xerval |= XER_CA32;
+		else
+			op->xerval &= ~XER_CA32;
+	}
+}
+
 static nokprobe_inline void add_with_carry(const struct pt_regs *regs,
 				     struct instruction_op *op, int rd,
 				     unsigned long val1, unsigned long val2,
@@ -985,6 +997,9 @@ static nokprobe_inline void add_with_carry(const struct pt_regs *regs,
 		op->xerval |= XER_CA;
 	else
 		op->xerval &= ~XER_CA;
+
+	set_ca32(op, (unsigned int)val < (unsigned int)val1 ||
+			(carry_in && (unsigned int)val == (unsigned int)val1));
 }
 
 static nokprobe_inline void do_cmp_signed(const struct pt_regs *regs,
@@ -1791,6 +1806,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
 				op->xerval |= XER_CA;
 			else
 				op->xerval &= ~XER_CA;
+			set_ca32(op, op->xerval & XER_CA);
 			goto logical_done;
 
 		case 824:	/* srawi */
@@ -1803,6 +1819,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
 				op->xerval |= XER_CA;
 			else
 				op->xerval &= ~XER_CA;
+			set_ca32(op, op->xerval & XER_CA);
 			goto logical_done;
 
 #ifdef __powerpc64__
@@ -1832,6 +1849,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
 				op->xerval |= XER_CA;
 			else
 				op->xerval &= ~XER_CA;
+			set_ca32(op, op->xerval & XER_CA);
 			goto logical_done;
 
 		case 826:	/* sradi with sh_5 = 0 */
@@ -1845,6 +1863,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
 				op->xerval |= XER_CA;
 			else
 				op->xerval &= ~XER_CA;
+			set_ca32(op, op->xerval & XER_CA);
 			goto logical_done;
 #endif /* __powerpc64__ */
 
@@ -2698,6 +2717,7 @@ void emulate_update_regs(struct pt_regs *regs, struct instruction_op *op)
 	}
 	regs->nip = next_pc;
 }
+NOKPROBE_SYMBOL(emulate_update_regs);
 
 /*
  * Emulate a previously-analysed load or store instruction.