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Commit d8ed9d48 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
Browse files

x86/idt: Create file for IDT related code 



IDT related code lives scattered around in various places. Create a new
source file in arch/x86/kernel/idt.c to hold it.

Move the idt_tables and descriptors to it for a start. Follow up patches
will gradually move more code over.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064958.367081121@linutronix.de


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 87cc0376

arch/x86/kernel/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -42,7 +42,7 @@ CFLAGS_irq.o := -I$(src)/../include/asm/trace 


obj-y			:= process_$(BITS).o signal.o

obj-$(CONFIG_COMPAT)	+= signal_compat.o

obj-y			+= traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o

obj-y			+= traps.o idt.o irq.o irq_$(BITS).o dumpstack_$(BITS).o

obj-y			+= time.o ioport.o dumpstack.o nmi.o

obj-$(CONFIG_MODIFY_LDT_SYSCALL)	+= ldt.o

obj-y			+= setup.o x86_init.o i8259.o irqinit.o jump_label.o

arch/x86/kernel/cpu/common.c

+0 −9
Original line number Diff line number Diff line
@@ -1289,15 +1289,6 @@ static __init int setup_disablecpuid(char *arg) 
__setup("clearcpuid=", setup_disablecpuid);



#ifdef CONFIG_X86_64

struct desc_ptr idt_descr __ro_after_init = {

	.size = NR_VECTORS * 16 - 1,

	.address = (unsigned long) idt_table,

};

const struct desc_ptr debug_idt_descr = {

	.size = NR_VECTORS * 16 - 1,

	.address = (unsigned long) debug_idt_table,

};



DEFINE_PER_CPU_FIRST(union irq_stack_union,

		     irq_stack_union) __aligned(PAGE_SIZE) __visible;

arch/x86/kernel/idt.c

0 → 100644
+26 −0
Original line number Diff line number Diff line 
/*

 * Interrupt descriptor table related code

 *

 * This file is licensed under the GPL V2

 */

#include <linux/interrupt.h>



#include <asm/desc.h>



/* Must be page-aligned because the real IDT is used in a fixmap. */

gate_desc idt_table[IDT_ENTRIES] __page_aligned_bss;



#ifdef CONFIG_X86_64

/* No need to be aligned, but done to keep all IDTs defined the same way. */

gate_desc debug_idt_table[IDT_ENTRIES] __page_aligned_bss;



struct desc_ptr idt_descr __ro_after_init = {

	.size		= IDT_ENTRIES * 16 - 1,

	.address	= (unsigned long) idt_table,

};



const struct desc_ptr debug_idt_descr = {

	.size		= IDT_ENTRIES * 16 - 1,

	.address	= (unsigned long) debug_idt_table,

};

#endif

arch/x86/kernel/traps.c

+0 −6
Original line number Diff line number Diff line
@@ -65,18 +65,12 @@ 
#include <asm/x86_init.h>

#include <asm/pgalloc.h>

#include <asm/proto.h>



/* No need to be aligned, but done to keep all IDTs defined the same way. */

gate_desc debug_idt_table[NR_VECTORS] __page_aligned_bss;

#else

#include <asm/processor-flags.h>

#include <asm/setup.h>

#include <asm/proto.h>

#endif



/* Must be page-aligned because the real IDT is used in a fixmap. */

gate_desc idt_table[NR_VECTORS] __page_aligned_bss;



DECLARE_BITMAP(used_vectors, NR_VECTORS);



static inline void cond_local_irq_enable(struct pt_regs *regs)