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tile/jump_label: add jump label support for TILE-Gx

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Add the arch-specific code to support jump label for TILE-Gx. This
code shares NOP instruction with ftrace, so we move it to a common
header file.

Reviewed-by: Chris Metcalf <cmetcalf@ezchip.com>
Signed-off-by: Zhigang Lu <zlu@ezchip.com>
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
This commit is contained in:
Zhigang Lu
2015-09-30 10:11:45 +08:00
committed by Chris Metcalf
parent f419e6f63c
commit 65a792e84f
6 changed files with 184 additions and 10 deletions
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11
arch/tile/kernel/ftrace.c
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@@ -20,21 +20,12 @@
#include <asm/cacheflush.h>
#include <asm/ftrace.h>
#include <asm/sections.h>
#include <asm/insn.h>
#include <arch/opcode.h>
#ifdef CONFIG_DYNAMIC_FTRACE
static inline tilegx_bundle_bits NOP(void)
{
return create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) |
create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) |
create_Opcode_X0(RRR_0_OPCODE_X0) |
create_UnaryOpcodeExtension_X1(NOP_UNARY_OPCODE_X1) |
create_RRROpcodeExtension_X1(UNARY_RRR_0_OPCODE_X1) |
create_Opcode_X1(RRR_0_OPCODE_X1);
}
static int machine_stopped __read_mostly;
int ftrace_arch_code_modify_prepare(void)