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x86: unify set_tss_desc

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This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Glauber de Oliveira Costa 2008-01-30 13:31:14 +01:00 committed by Ingo Molnar
parent 507f90c9f9
commit c81c6ca45a
3 changed files with 33 additions and 66 deletions
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39
include/asm-x86/desc.h
View File

@ -165,6 +165,39 @@ static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
#endif
}
static inline void pack_tss(tss_desc *tss, unsigned long addr,
unsigned size, unsigned entry)
{
#ifdef CONFIG_X86_64
set_tssldt_descriptor(tss,
addr, entry, size);
#else
pack_descriptor(tss, (unsigned long)addr,
size,
0x80 | entry, 0);
#endif
}
static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
{
struct desc_struct *d = get_cpu_gdt_table(cpu);
tss_desc tss;
/*
* sizeof(unsigned long) coming from an extra "long" at the end
* of the iobitmap. See tss_struct definition in processor.h
*
* -1? seg base+limit should be pointing to the address of the
* last valid byte
*/
pack_tss(&tss, (unsigned long)addr,
IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
DESC_TSS);
write_gdt_entry(d, entry, &tss, DESC_TSS);
}
#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
static inline void native_set_ldt(const void *addr, unsigned int entries)
{
if (likely(entries == 0))
@ -222,12 +255,6 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
}
#ifdef CONFIG_X86_32
# include "desc_32.h"
#else
# include "desc_64.h"
#endif
#define _LDT_empty(info) (\
(info)->base_addr == 0 && \
(info)->limit == 0 && \

27
include/asm-x86/desc_32.h
View File

@ -1,27 +0,0 @@
#ifndef __ARCH_DESC_H
#define __ARCH_DESC_H
#include <asm/ldt.h>
#include <asm/segment.h>
#include <asm/desc_defs.h>
#ifndef __ASSEMBLY__
#include <linux/preempt.h>
#include <linux/percpu.h>
static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
{
tss_desc tss;
pack_descriptor(&tss, (unsigned long)addr,
offsetof(struct tss_struct, __cacheline_filler) - 1,
DESC_TSS, 0);
write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
}
#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
#endif /* !__ASSEMBLY__ */
#endif

33
include/asm-x86/desc_64.h
View File

@ -1,34 +1 @@
/* Written 2000 by Andi Kleen */
#ifndef __ARCH_DESC_H
#define __ARCH_DESC_H
#include <linux/threads.h>
#include <asm/ldt.h>
#ifndef __ASSEMBLY__
#include <linux/string.h>
#include <asm/segment.h>
static inline void set_tss_desc(unsigned cpu, void *addr)
{
struct desc_struct *d = get_cpu_gdt_table(cpu);
tss_desc tss;
/*
* sizeof(unsigned long) coming from an extra "long" at the end
* of the iobitmap. See tss_struct definition in processor.h
*
* -1? seg base+limit should be pointing to the address of the
* last valid byte
*/
set_tssldt_descriptor(&tss,
(unsigned long)addr, DESC_TSS,
IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
}
#endif /* !__ASSEMBLY__ */
#endif