diff options
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/Makefile | 3 | ||||
| -rw-r--r-- | arch/powerpc/lib/alloc.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/lib/pmem.c | 67 | ||||
| -rw-r--r-- | arch/powerpc/lib/sstep.c | 26 | ||||
| -rw-r--r-- | arch/powerpc/lib/xor_vmx.h | 1 |
5 files changed, 95 insertions, 3 deletions
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index 50d5bf954cff..3c29c9009bbf 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 # # Makefile for ppc-specific library files.. # @@ -23,7 +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/alloc.c b/arch/powerpc/lib/alloc.c index a58abe4afbd1..06796dec01ea 100644 --- a/arch/powerpc/lib/alloc.c +++ b/arch/powerpc/lib/alloc.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 #include <linux/types.h> #include <linux/init.h> #include <linux/slab.h> 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 5e8418c28bd8..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, @@ -1684,11 +1699,13 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, * Logical instructions */ case 26: /* cntlzw */ - op->val = __builtin_clz((unsigned int) regs->gpr[rd]); + val = (unsigned int) regs->gpr[rd]; + op->val = ( val ? __builtin_clz(val) : 32 ); goto logical_done; #ifdef __powerpc64__ case 58: /* cntlzd */ - op->val = __builtin_clzl(regs->gpr[rd]); + val = regs->gpr[rd]; + op->val = ( val ? __builtin_clzl(val) : 64 ); goto logical_done; #endif case 28: /* and */ @@ -1789,6 +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 */ @@ -1801,6 +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__ @@ -1830,6 +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 */ @@ -1843,6 +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__ */ @@ -2696,6 +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. diff --git a/arch/powerpc/lib/xor_vmx.h b/arch/powerpc/lib/xor_vmx.h index 4746708451ae..5c2b0839b179 100644 --- a/arch/powerpc/lib/xor_vmx.h +++ b/arch/powerpc/lib/xor_vmx.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Simple interface to link xor_vmx.c and xor_vmx_glue.c * |