xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

jump label: Add sparc64 support

Browse Source 
Add jump label support for sparc64.

Signed-off-by: David S. Miller <davem@davemloft.net>
LKML-Reference: <3b5b071fcdb2afb7f67cacecfa78b14c740278a7.1284733808.git.jbaron@redhat.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>

[ cleaned up some formatting ]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
David S. Miller
2010-09-17 11:09:25 -04:00
committed by Steven Rostedt
parent d9f5ab7b1c
commit dff9d3c215
5 changed files with 88 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/sparc/kernel/Makefile
View File

@@ -119,3 +119,5 @@ obj-$(CONFIG_COMPAT) += $(audit--y)
pc--$(CONFIG_PERF_EVENTS) := perf_event.o
obj-$(CONFIG_SPARC64) += $(pc--y)
obj-$(CONFIG_SPARC64) += jump_label.o

47
arch/sparc/kernel/jump_label.c Normal file
View File

@@ -0,0 +1,47 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/cpu.h>
#include <linux/jump_label.h>
#include <linux/memory.h>
#ifdef HAVE_JUMP_LABEL
void arch_jump_label_transform(struct jump_entry *entry,
enum jump_label_type type)
{
u32 val;
u32 *insn = (u32 *) (unsigned long) entry->code;
if (type == JUMP_LABEL_ENABLE) {
s32 off = (s32)entry->target - (s32)entry->code;
#ifdef CONFIG_SPARC64
/* ba,pt %xcc, . + (off << 2) */
val = 0x10680000 | ((u32) off >> 2);
#else
/* ba . + (off << 2) */
val = 0x10800000 | ((u32) off >> 2);
#endif
} else {
val = 0x01000000;
}
get_online_cpus();
mutex_lock(&text_mutex);
*insn = val;
flushi(insn);
mutex_unlock(&text_mutex);
put_online_cpus();
}
void arch_jump_label_text_poke_early(jump_label_t addr)
{
u32 *insn_p = (u32 *) (unsigned long) addr;
*insn_p = 0x01000000;
flushi(insn_p);
}
#endif

6
arch/sparc/kernel/module.c
View File

@@ -18,6 +18,9 @@
#include <asm/spitfire.h>
#ifdef CONFIG_SPARC64
#include <linux/jump_label.h>
static void *module_map(unsigned long size)
{
struct vm_struct *area;
@@ -227,6 +230,9 @@ int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *me)
{
/* make jump label nops */
jump_label_apply_nops(me);
/* Cheetah's I-cache is fully coherent. */
if (tlb_type == spitfire) {
unsigned long va;