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Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix build with older binutils and consolidate linker script
  x86: Fix an incorrect argument of reserve_bootmem()
  x86: add vmlinux.lds to targets in arch/x86/boot/compressed/Makefile
  xen: rearrange things to fix stackprotector
  x86: make sure load_percpu_segment has no stackprotector
  i386: Fix section mismatches for init code with !HOTPLUG_CPU
  x86, pat: Allow ISA memory range uncacheable mapping requests
This commit is contained in:
Linus Torvalds 2009-08-25 11:23:25 -07:00
parent e9cab24cf3 c62e43202e
commit 9f459fadbb
9 changed files with 87 additions and 110 deletions
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2
arch/x86/boot/compressed/Makefile
View File

@ -4,7 +4,7 @@
# create a compressed vmlinux image from the original vmlinux
#
targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o
targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o
KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
KBUILD_CFLAGS += -fno-strict-aliasing -fPIC

12
arch/x86/include/asm/pgtable.h
View File

@ -2,6 +2,7 @@
#define _ASM_X86_PGTABLE_H
#include <asm/page.h>
#include <asm/e820.h>
#include <asm/pgtable_types.h>
@ -269,9 +270,16 @@ static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
#define canon_pgprot(p) __pgprot(massage_pgprot(p))
static inline int is_new_memtype_allowed(unsigned long flags,
unsigned long new_flags)
static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,
unsigned long flags,
unsigned long new_flags)
{
/*
* PAT type is always WB for ISA. So no need to check.
*/
if (is_ISA_range(paddr, paddr + size - 1))
return 1;
/*
* Certain new memtypes are not allowed with certain
* requested memtype:

4
arch/x86/kernel/cpu/Makefile
View File

@ -7,6 +7,10 @@ ifdef CONFIG_FUNCTION_TRACER
CFLAGS_REMOVE_common.o = -pg
endif
# Make sure load_percpu_segment has no stackprotector
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_common.o := $(nostackp)
obj-y := intel_cacheinfo.o addon_cpuid_features.o
obj-y += proc.o capflags.o powerflags.o common.o
obj-y += vmware.o hypervisor.o

8
arch/x86/kernel/head_32.S
View File

@ -261,9 +261,7 @@ page_pde_offset = (__PAGE_OFFSET >> 20);
* which will be freed later
*/
#ifndef CONFIG_HOTPLUG_CPU
.section .init.text,"ax",@progbits
#endif
__CPUINIT
#ifdef CONFIG_SMP
ENTRY(startup_32_smp)
@ -602,11 +600,7 @@ ignore_int:
#endif
iret
#ifndef CONFIG_HOTPLUG_CPU
__CPUINITDATA
#else
__REFDATA
#endif
.align 4
ENTRY(initial_code)
.long i386_start_kernel

140
arch/x86/kernel/vmlinux.lds.S
View File

@ -46,11 +46,10 @@ PHDRS {
data PT_LOAD FLAGS(7); /* RWE */
#ifdef CONFIG_X86_64
user PT_LOAD FLAGS(7); /* RWE */
data.init PT_LOAD FLAGS(7); /* RWE */
#ifdef CONFIG_SMP
percpu PT_LOAD FLAGS(7); /* RWE */
#endif
data.init2 PT_LOAD FLAGS(7); /* RWE */
init PT_LOAD FLAGS(7); /* RWE */
#endif
note PT_NOTE FLAGS(0); /* ___ */
}
@ -103,65 +102,43 @@ SECTIONS
__stop___ex_table = .;
} :text = 0x9090
RODATA
RO_DATA(PAGE_SIZE)
/* Data */
. = ALIGN(PAGE_SIZE);
.data : AT(ADDR(.data) - LOAD_OFFSET) {
/* Start of data section */
_sdata = .;
/* init_task */
INIT_TASK_DATA(THREAD_SIZE)
#ifdef CONFIG_X86_32
/* 32 bit has nosave before _edata */
NOSAVE_DATA
#endif
PAGE_ALIGNED_DATA(PAGE_SIZE)
*(.data.idt)
CACHELINE_ALIGNED_DATA(CONFIG_X86_L1_CACHE_BYTES)
DATA_DATA
CONSTRUCTORS
} :data
#ifdef CONFIG_X86_32
/* 32 bit has nosave before _edata */
. = ALIGN(PAGE_SIZE);
.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
__nosave_begin = .;
*(.data.nosave)
. = ALIGN(PAGE_SIZE);
__nosave_end = .;
}
#endif
. = ALIGN(PAGE_SIZE);
.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
*(.data.page_aligned)
*(.data.idt)
}
#ifdef CONFIG_X86_32
. = ALIGN(32);
#else
. = ALIGN(PAGE_SIZE);
. = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
#endif
.data.cacheline_aligned :
AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
*(.data.cacheline_aligned)
}
/* rarely changed data like cpu maps */
#ifdef CONFIG_X86_32
. = ALIGN(32);
#else
. = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
#endif
.data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
*(.data.read_mostly)
/* rarely changed data like cpu maps */
READ_MOSTLY_DATA(CONFIG_X86_INTERNODE_CACHE_BYTES)
/* End of data section */
_edata = .;
}
} :data
#ifdef CONFIG_X86_64
#define VSYSCALL_ADDR (-10*1024*1024)
#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + \
SIZEOF(.data.read_mostly) + 4095) & ~(4095))
#define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + \
SIZEOF(.data.read_mostly) + 4095) & ~(4095))
#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data) + SIZEOF(.data) + \
PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
#define VSYSCALL_VIRT_ADDR ((ADDR(.data) + SIZEOF(.data) + \
PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
#define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
#define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
@ -227,35 +204,29 @@ SECTIONS
#endif /* CONFIG_X86_64 */
/* init_task */
. = ALIGN(THREAD_SIZE);
.data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
*(.data.init_task)
}
#ifdef CONFIG_X86_64
:data.init
#endif
/*
* smp_locks might be freed after init
* start/end must be page aligned
*/
. = ALIGN(PAGE_SIZE);
.smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
__smp_locks = .;
*(.smp_locks)
__smp_locks_end = .;
. = ALIGN(PAGE_SIZE);
}
/* Init code and data - will be freed after init */
. = ALIGN(PAGE_SIZE);
.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
.init.begin : AT(ADDR(.init.begin) - LOAD_OFFSET) {
__init_begin = .; /* paired with __init_end */
}
#if defined(CONFIG_X86_64) && defined(CONFIG_SMP)
/*
* percpu offsets are zero-based on SMP. PERCPU_VADDR() changes the
* output PHDR, so the next output section - .init.text - should
* start another segment - init.
*/
PERCPU_VADDR(0, :percpu)
#endif
.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
_sinittext = .;
INIT_TEXT
_einittext = .;
}
#ifdef CONFIG_X86_64
:init
#endif
.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
INIT_DATA
@ -326,17 +297,7 @@ SECTIONS
}
#endif
#if defined(CONFIG_X86_64) && defined(CONFIG_SMP)
/*
* percpu offsets are zero-based on SMP. PERCPU_VADDR() changes the
* output PHDR, so the next output section - __data_nosave - should
* start another section data.init2. Also, pda should be at the head of
* percpu area. Preallocate it and define the percpu offset symbol
* so that it can be accessed as a percpu variable.
*/
. = ALIGN(PAGE_SIZE);
PERCPU_VADDR(0, :percpu)
#else
#if !defined(CONFIG_X86_64) || !defined(CONFIG_SMP)
PERCPU(PAGE_SIZE)
#endif
@ -347,15 +308,22 @@ SECTIONS
__init_end = .;
}
/*
* smp_locks might be freed after init
* start/end must be page aligned
*/
. = ALIGN(PAGE_SIZE);
.smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
__smp_locks = .;
*(.smp_locks)
__smp_locks_end = .;
. = ALIGN(PAGE_SIZE);
}
#ifdef CONFIG_X86_64
.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
. = ALIGN(PAGE_SIZE);
__nosave_begin = .;
*(.data.nosave)
. = ALIGN(PAGE_SIZE);
__nosave_end = .;
} :data.init2
/* use another section data.init2, see PERCPU_VADDR() above */
NOSAVE_DATA
}
#endif
/* BSS */

2
arch/x86/mm/init_64.c
View File

@ -796,7 +796,7 @@ int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
return ret;
#else
reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
reserve_bootmem(phys, len, flags);
#endif
if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {

3
arch/x86/mm/pat.c
View File

@ -623,7 +623,8 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot,
return ret;
if (flags != want_flags) {
if (strict_prot || !is_new_memtype_allowed(want_flags, flags)) {
if (strict_prot ||
!is_new_memtype_allowed(paddr, size, want_flags, flags)) {
free_memtype(paddr, paddr + size);
printk(KERN_ERR "%s:%d map pfn expected mapping type %s"
" for %Lx-%Lx, got %s\n",

4
arch/x86/xen/Makefile
View File

@ -5,6 +5,10 @@ CFLAGS_REMOVE_time.o = -pg
CFLAGS_REMOVE_irq.o = -pg
endif
# Make sure early boot has no stackprotector
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_enlighten.o := $(nostackp)
obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
time.o xen-asm.o xen-asm_$(BITS).o \
grant-table.o suspend.o

22
arch/x86/xen/enlighten.c
View File

@ -974,10 +974,6 @@ asmlinkage void __init xen_start_kernel(void)
xen_domain_type = XEN_PV_DOMAIN;
BUG_ON(memcmp(xen_start_info->magic, "xen-3", 5) != 0);
xen_setup_features();
/* Install Xen paravirt ops */
pv_info = xen_info;
pv_init_ops = xen_init_ops;
@ -986,8 +982,15 @@ asmlinkage void __init xen_start_kernel(void)
pv_apic_ops = xen_apic_ops;
pv_mmu_ops = xen_mmu_ops;
xen_init_irq_ops();
#ifdef CONFIG_X86_64
/*
* Setup percpu state. We only need to do this for 64-bit
* because 32-bit already has %fs set properly.
*/
load_percpu_segment(0);
#endif
xen_init_irq_ops();
xen_init_cpuid_mask();
#ifdef CONFIG_X86_LOCAL_APIC
@ -997,6 +1000,8 @@ asmlinkage void __init xen_start_kernel(void)
set_xen_basic_apic_ops();
#endif
xen_setup_features();
if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;
pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;
@ -1004,13 +1009,6 @@ asmlinkage void __init xen_start_kernel(void)
machine_ops = xen_machine_ops;
#ifdef CONFIG_X86_64
/*
* Setup percpu state. We only need to do this for 64-bit
* because 32-bit already has %fs set properly.
*/
load_percpu_segment(0);
#endif
/*
* The only reliable way to retain the initial address of the
* percpu gdt_page is to remember it here, so we can go and