diff options
Diffstat (limited to 'arch/x86/lib')
| -rw-r--r-- | arch/x86/lib/Makefile | 5 | ||||
| -rw-r--r-- | arch/x86/lib/cache-smp.c | 19 | ||||
| -rw-r--r-- | arch/x86/lib/io_64.c | 25 | ||||
| -rw-r--r-- | arch/x86/lib/rwsem_64.S | 81 |
4 files changed, 103 insertions, 27 deletions
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index 05d686bbbe9..3ac4a8ade62 100644 --- a/arch/x86/lib/Makefile +++ b/arch/x86/lib/Makefile @@ -14,7 +14,7 @@ $(obj)/inat.o: $(obj)/inat-tables.c clean-files := inat-tables.c -obj-$(CONFIG_SMP) += msr-smp.o +obj-$(CONFIG_SMP) += msr-smp.o cache-smp.o lib-y := delay.o lib-y += thunk_$(BITS).o @@ -35,9 +35,10 @@ ifneq ($(CONFIG_X86_CMPXCHG64),y) endif lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o else - obj-y += io_64.o iomap_copy_64.o + obj-y += iomap_copy_64.o lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o lib-y += thunk_64.o clear_page_64.o copy_page_64.o lib-y += memmove_64.o memset_64.o lib-y += copy_user_64.o rwlock_64.o copy_user_nocache_64.o + lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem_64.o endif diff --git a/arch/x86/lib/cache-smp.c b/arch/x86/lib/cache-smp.c new file mode 100644 index 00000000000..a3c66887503 --- /dev/null +++ b/arch/x86/lib/cache-smp.c @@ -0,0 +1,19 @@ +#include <linux/smp.h> +#include <linux/module.h> + +static void __wbinvd(void *dummy) +{ + wbinvd(); +} + +void wbinvd_on_cpu(int cpu) +{ + smp_call_function_single(cpu, __wbinvd, NULL, 1); +} +EXPORT_SYMBOL(wbinvd_on_cpu); + +int wbinvd_on_all_cpus(void) +{ + return on_each_cpu(__wbinvd, NULL, 1); +} +EXPORT_SYMBOL(wbinvd_on_all_cpus); diff --git a/arch/x86/lib/io_64.c b/arch/x86/lib/io_64.c deleted file mode 100644 index 3f1eb59b5f0..00000000000 --- a/arch/x86/lib/io_64.c +++ /dev/null @@ -1,25 +0,0 @@ -#include <linux/string.h> -#include <linux/module.h> -#include <asm/io.h> - -void __memcpy_toio(unsigned long dst, const void *src, unsigned len) -{ - __inline_memcpy((void *)dst, src, len); -} -EXPORT_SYMBOL(__memcpy_toio); - -void __memcpy_fromio(void *dst, unsigned long src, unsigned len) -{ - __inline_memcpy(dst, (const void *)src, len); -} -EXPORT_SYMBOL(__memcpy_fromio); - -void memset_io(volatile void __iomem *a, int b, size_t c) -{ - /* - * TODO: memset can mangle the IO patterns quite a bit. - * perhaps it would be better to use a dumb one: - */ - memset((void *)a, b, c); -} -EXPORT_SYMBOL(memset_io); diff --git a/arch/x86/lib/rwsem_64.S b/arch/x86/lib/rwsem_64.S new file mode 100644 index 00000000000..15acecf0d7a --- /dev/null +++ b/arch/x86/lib/rwsem_64.S @@ -0,0 +1,81 @@ +/* + * x86-64 rwsem wrappers + * + * This interfaces the inline asm code to the slow-path + * C routines. We need to save the call-clobbered regs + * that the asm does not mark as clobbered, and move the + * argument from %rax to %rdi. + * + * NOTE! We don't need to save %rax, because the functions + * will always return the semaphore pointer in %rax (which + * is also the input argument to these helpers) + * + * The following can clobber %rdx because the asm clobbers it: + * call_rwsem_down_write_failed + * call_rwsem_wake + * but %rdi, %rsi, %rcx, %r8-r11 always need saving. + */ + +#include <linux/linkage.h> +#include <asm/rwlock.h> +#include <asm/alternative-asm.h> +#include <asm/frame.h> +#include <asm/dwarf2.h> + +#define save_common_regs \ + pushq %rdi; \ + pushq %rsi; \ + pushq %rcx; \ + pushq %r8; \ + pushq %r9; \ + pushq %r10; \ + pushq %r11 + +#define restore_common_regs \ + popq %r11; \ + popq %r10; \ + popq %r9; \ + popq %r8; \ + popq %rcx; \ + popq %rsi; \ + popq %rdi + +/* Fix up special calling conventions */ +ENTRY(call_rwsem_down_read_failed) + save_common_regs + pushq %rdx + movq %rax,%rdi + call rwsem_down_read_failed + popq %rdx + restore_common_regs + ret + ENDPROC(call_rwsem_down_read_failed) + +ENTRY(call_rwsem_down_write_failed) + save_common_regs + movq %rax,%rdi + call rwsem_down_write_failed + restore_common_regs + ret + ENDPROC(call_rwsem_down_write_failed) + +ENTRY(call_rwsem_wake) + decw %dx /* do nothing if still outstanding active readers */ + jnz 1f + save_common_regs + movq %rax,%rdi + call rwsem_wake + restore_common_regs +1: ret + ENDPROC(call_rwsem_wake) + +/* Fix up special calling conventions */ +ENTRY(call_rwsem_downgrade_wake) + save_common_regs + pushq %rdx + movq %rax,%rdi + call rwsem_downgrade_wake + popq %rdx + restore_common_regs + ret + ENDPROC(call_rwsem_downgrade_wake) |