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[PATCH] uml: split ldt.h in arch-independent and arch-dependant code
ldt-{i386,x86_64}.h is made of two different parts - some code for parsing of
LDT descriptors, which is arch-dependant, and the code to handle uml_ldt_t (an
LDT block inside UML), which is mostly arch-independant (among x86 and x86_64,
at least).
Join the common part in a single file (ldt.h) and split the rest away
(host_ldt-{i386,x86_64}.h).
This is needed because processor.h, with next patches, will start including
the LDT descriptor parsing macros in host_ldt.h, but it can't include ldt.h
because it uses semaphores (and to define semaphores one must first include
processor.h!).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso
Linus Torvalds
parent
12523bdce1
commit
fbdf216155
@ -20,7 +20,7 @@ core-y += $(ARCH_DIR)/kernel/ \
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# Have to precede the include because the included Makefiles reference them.
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SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \
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module.h vm-flags.h elf.h ldt.h
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module.h vm-flags.h elf.h host_ldt.h
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SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))
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# XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
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34
include/asm-um/host_ldt-i386.h
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34
include/asm-um/host_ldt-i386.h
Normal file
@ -0,0 +1,34 @@
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#ifndef __ASM_HOST_LDT_I386_H
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#define __ASM_HOST_LDT_I386_H
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#include "asm/arch/ldt.h"
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/*
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* macros stolen from include/asm-i386/desc.h
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*/
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#define LDT_entry_a(info) \
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((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
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#define LDT_entry_b(info) \
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(((info)->base_addr & 0xff000000) | \
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(((info)->base_addr & 0x00ff0000) >> 16) | \
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((info)->limit & 0xf0000) | \
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(((info)->read_exec_only ^ 1) << 9) | \
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((info)->contents << 10) | \
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(((info)->seg_not_present ^ 1) << 15) | \
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((info)->seg_32bit << 22) | \
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((info)->limit_in_pages << 23) | \
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((info)->useable << 20) | \
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0x7000)
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#define LDT_empty(info) (\
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(info)->base_addr == 0 && \
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(info)->limit == 0 && \
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(info)->contents == 0 && \
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(info)->read_exec_only == 1 && \
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(info)->seg_32bit == 0 && \
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(info)->limit_in_pages == 0 && \
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(info)->seg_not_present == 1 && \
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(info)->useable == 0 )
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#endif
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@ -1,43 +1,8 @@
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/*
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* Copyright (C) 2004 Fujitsu Siemens Computers GmbH
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* Licensed under the GPL
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*
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* Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
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*/
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#ifndef __ASM_HOST_LDT_X86_64_H
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#define __ASM_HOST_LDT_X86_64_H
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#ifndef __ASM_LDT_X86_64_H
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#define __ASM_LDT_X86_64_H
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#include "asm/semaphore.h"
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#include "asm/arch/ldt.h"
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struct mmu_context_skas;
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extern void ldt_host_info(void);
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extern long init_new_ldt(struct mmu_context_skas * to_mm,
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struct mmu_context_skas * from_mm);
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extern void free_ldt(struct mmu_context_skas * mm);
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#define LDT_PAGES_MAX \
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((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
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#define LDT_ENTRIES_PER_PAGE \
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(PAGE_SIZE/LDT_ENTRY_SIZE)
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#define LDT_DIRECT_ENTRIES \
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((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
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struct ldt_entry {
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__u32 a;
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__u32 b;
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};
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typedef struct uml_ldt {
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int entry_count;
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struct semaphore semaphore;
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union {
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struct ldt_entry * pages[LDT_PAGES_MAX];
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struct ldt_entry entries[LDT_DIRECT_ENTRIES];
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} u;
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} uml_ldt_t;
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/*
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* macros stolen from include/asm-x86_64/desc.h
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*/
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@ -1,69 +0,0 @@
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/*
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* Copyright (C) 2004 Fujitsu Siemens Computers GmbH
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* Licensed under the GPL
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*
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* Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
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*/
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#ifndef __ASM_LDT_I386_H
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#define __ASM_LDT_I386_H
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#include "asm/semaphore.h"
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#include "asm/arch/ldt.h"
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struct mmu_context_skas;
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extern void ldt_host_info(void);
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extern long init_new_ldt(struct mmu_context_skas * to_mm,
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struct mmu_context_skas * from_mm);
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extern void free_ldt(struct mmu_context_skas * mm);
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#define LDT_PAGES_MAX \
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((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
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#define LDT_ENTRIES_PER_PAGE \
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(PAGE_SIZE/LDT_ENTRY_SIZE)
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#define LDT_DIRECT_ENTRIES \
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((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
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struct ldt_entry {
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__u32 a;
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__u32 b;
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};
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typedef struct uml_ldt {
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int entry_count;
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struct semaphore semaphore;
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union {
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struct ldt_entry * pages[LDT_PAGES_MAX];
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struct ldt_entry entries[LDT_DIRECT_ENTRIES];
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} u;
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} uml_ldt_t;
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/*
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* macros stolen from include/asm-i386/desc.h
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*/
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#define LDT_entry_a(info) \
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((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
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#define LDT_entry_b(info) \
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(((info)->base_addr & 0xff000000) | \
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(((info)->base_addr & 0x00ff0000) >> 16) | \
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((info)->limit & 0xf0000) | \
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(((info)->read_exec_only ^ 1) << 9) | \
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((info)->contents << 10) | \
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(((info)->seg_not_present ^ 1) << 15) | \
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((info)->seg_32bit << 22) | \
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((info)->limit_in_pages << 23) | \
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((info)->useable << 20) | \
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0x7000)
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#define LDT_empty(info) (\
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(info)->base_addr == 0 && \
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(info)->limit == 0 && \
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(info)->contents == 0 && \
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(info)->read_exec_only == 1 && \
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(info)->seg_32bit == 0 && \
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(info)->limit_in_pages == 0 && \
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(info)->seg_not_present == 1 && \
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(info)->useable == 0 )
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#endif
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41
include/asm-um/ldt.h
Normal file
41
include/asm-um/ldt.h
Normal file
@ -0,0 +1,41 @@
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/*
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* Copyright (C) 2004 Fujitsu Siemens Computers GmbH
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* Licensed under the GPL
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*
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* Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
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*/
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#ifndef __ASM_LDT_H
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#define __ASM_LDT_H
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#include "asm/semaphore.h"
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#include "asm/host_ldt.h"
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struct mmu_context_skas;
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extern void ldt_host_info(void);
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extern long init_new_ldt(struct mmu_context_skas * to_mm,
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struct mmu_context_skas * from_mm);
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extern void free_ldt(struct mmu_context_skas * mm);
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#define LDT_PAGES_MAX \
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((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
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#define LDT_ENTRIES_PER_PAGE \
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(PAGE_SIZE/LDT_ENTRY_SIZE)
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#define LDT_DIRECT_ENTRIES \
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((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
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struct ldt_entry {
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__u32 a;
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__u32 b;
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};
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typedef struct uml_ldt {
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int entry_count;
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struct semaphore semaphore;
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union {
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struct ldt_entry * pages[LDT_PAGES_MAX];
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struct ldt_entry entries[LDT_DIRECT_ENTRIES];
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} u;
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} uml_ldt_t;
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#endif
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