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Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

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* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6:
  [PATCH] Use early clobber in semaphores
  [PATCH] Define vsyscall cache as blob to make clearer that user space shouldn't use it
  [PATCH] Re-positioning the bss segment
  [PATCH] Use ARRAY_SIZE in setup.c
  [PATCH] i386: replace intermediate array-size definitions with ARRAY_SIZE()
  [PATCH] x86: Clean up x86 NMI sysctls
  [PATCH] Refactor some duplicated code in mpparse.c
  [PATCH] Document iommu=panic
  [PATCH] Fix broken indentation in iommu_setup
  [PATCH] Allow disabling DAC using command line options
  [PATCH] Add proper sparse __user casts to __copy_to_user_inatomic
  [PATCH] i386: Update defconfig
  [PATCH] Update defconfig
This commit is contained in:
Linus Torvalds 2006-09-30 08:37:55 -07:00
parent bf60362566 c84ef53059
commit 369aa8395a
20 changed files with 151 additions and 105 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
Documentation/x86_64/boot-options.txt
View file

@ -199,6 +199,11 @@ IOMMU
allowed overwrite iommu off workarounds for specific chipsets.
soft Use software bounce buffering (default for Intel machines)
noaperture Don't touch the aperture for AGP.
allowdac Allow DMA >4GB
When off all DMA over >4GB is forced through an IOMMU or bounce
buffering.
nodac Forbid DMA >4GB
panic Always panic when IOMMU overflows
swiotlb=pages[,force]

7
arch/i386/defconfig
View file

@ -1,7 +1,7 @@
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.18-git5
# Tue Sep 26 09:30:47 2006
# Linux kernel version: 2.6.18-git7
# Wed Sep 27 21:53:10 2006
#
CONFIG_X86_32=y
CONFIG_GENERIC_TIME=y
@ -210,6 +210,7 @@ CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_PM=y
CONFIG_PM_LEGACY=y
# CONFIG_PM_DEBUG is not set
CONFIG_PM_SYSFS_DEPRECATED=y
#
# ACPI (Advanced Configuration and Power Interface) Support
@ -292,6 +293,7 @@ CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
# CONFIG_PCIEPORTBUS is not set
CONFIG_PCI_MSI=y
# CONFIG_PCI_MULTITHREAD_PROBE is not set
# CONFIG_PCI_DEBUG is not set
CONFIG_ISA_DMA_API=y
# CONFIG_ISA is not set
@ -1427,6 +1429,7 @@ CONFIG_KPROBES=y
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_PRINTK_TIME is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_MAGIC_SYSRQ=y
CONFIG_UNUSED_SYMBOLS=y
CONFIG_DEBUG_KERNEL=y

3
arch/i386/kernel/nmi.c
View file

@ -31,6 +31,9 @@
#include "mach_traps.h"
int unknown_nmi_panic;
int nmi_watchdog_enabled;
/* perfctr_nmi_owner tracks the ownership of the perfctr registers:
* evtsel_nmi_owner tracks the ownership of the event selection
* - different performance counters/ event selection may be reserved for

10
arch/i386/kernel/setup.c
View file

@ -209,9 +209,6 @@ static struct resource adapter_rom_resources[] = { {
.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
} };
#define ADAPTER_ROM_RESOURCES \
(sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
static struct resource video_rom_resource = {
.name = "Video ROM",
.start = 0xc0000,
@ -273,9 +270,6 @@ static struct resource standard_io_resources[] = { {
.flags = IORESOURCE_BUSY | IORESOURCE_IO
} };
#define STANDARD_IO_RESOURCES \
(sizeof standard_io_resources / sizeof standard_io_resources[0])
#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
static int __init romchecksum(unsigned char *rom, unsigned long length)
@ -332,7 +326,7 @@ static void __init probe_roms(void)
}
/* check for adapter roms on 2k boundaries */
for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
rom = isa_bus_to_virt(start);
if (!romsignature(rom))
continue;
@ -1272,7 +1266,7 @@ static int __init request_standard_resources(void)
request_resource(&iomem_resource, &video_ram_resource);
/* request I/O space for devices used on all i[345]86 PCs */
for (i = 0; i < STANDARD_IO_RESOURCES; i++)
for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
request_resource(&ioport_resource, &standard_io_resources[i]);
return 0;
}

2
arch/i386/kernel/traps.c
View file

@ -57,6 +57,8 @@
#include "mach_traps.h"
int panic_on_unrecovered_nmi;
asmlinkage int system_call(void);
struct desc_struct default_ldt[] = { { 0, 0 }, { 0, 0 }, { 0, 0 },

8
arch/x86_64/defconfig
View file

@ -1,11 +1,12 @@
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.18-git5
# Tue Sep 26 09:30:47 2006
# Linux kernel version: 2.6.18-git7
# Wed Sep 27 21:53:10 2006
#
CONFIG_X86_64=y
CONFIG_64BIT=y
CONFIG_X86=y
CONFIG_ZONE_DMA32=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_SEMAPHORE_SLEEPERS=y
@ -179,6 +180,7 @@ CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_PM=y
# CONFIG_PM_LEGACY is not set
# CONFIG_PM_DEBUG is not set
# CONFIG_PM_SYSFS_DEPRECATED is not set
CONFIG_SOFTWARE_SUSPEND=y
CONFIG_PM_STD_PARTITION=""
CONFIG_SUSPEND_SMP=y
@ -251,6 +253,7 @@ CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCIEPORTBUS=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_MULTITHREAD_PROBE is not set
# CONFIG_PCI_DEBUG is not set
#
@ -1458,6 +1461,7 @@ CONFIG_KPROBES=y
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_PRINTK_TIME is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_MAGIC_SYSRQ=y
CONFIG_UNUSED_SYMBOLS=y
CONFIG_DEBUG_KERNEL=y

37
arch/x86_64/kernel/mpparse.c
View file

@ -152,6 +152,21 @@ static void __init MP_bus_info (struct mpc_config_bus *m)
}
}
static int bad_ioapic(unsigned long address)
{
if (nr_ioapics >= MAX_IO_APICS) {
printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
"(found %d)\n", MAX_IO_APICS, nr_ioapics);
panic("Recompile kernel with bigger MAX_IO_APICS!\n");
}
if (!address) {
printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
" found in table, skipping!\n");
return 1;
}
return 0;
}
static void __init MP_ioapic_info (struct mpc_config_ioapic *m)
{
if (!(m->mpc_flags & MPC_APIC_USABLE))
@ -159,16 +174,10 @@ static void __init MP_ioapic_info (struct mpc_config_ioapic *m)
printk("I/O APIC #%d at 0x%X.\n",
m->mpc_apicid, m->mpc_apicaddr);
if (nr_ioapics >= MAX_IO_APICS) {
printk(KERN_ERR "Max # of I/O APICs (%d) exceeded (found %d).\n",
MAX_IO_APICS, nr_ioapics);
panic("Recompile kernel with bigger MAX_IO_APICS!.\n");
}
if (!m->mpc_apicaddr) {
printk(KERN_ERR "WARNING: bogus zero I/O APIC address"
" found in MP table, skipping!\n");
if (bad_ioapic(m->mpc_apicaddr))
return;
}
mp_ioapics[nr_ioapics] = *m;
nr_ioapics++;
}
@ -647,16 +656,8 @@ void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
{
int idx = 0;
if (nr_ioapics >= MAX_IO_APICS) {
printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
"(found %d)\n", MAX_IO_APICS, nr_ioapics);
panic("Recompile kernel with bigger MAX_IO_APICS!\n");
}
if (!address) {
printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
" found in MADT table, skipping!\n");
if (bad_ioapic(address))
return;
}
idx = nr_ioapics++;

4
arch/x86_64/kernel/nmi.c
View file

@ -28,6 +28,10 @@
#include <asm/mce.h>
#include <asm/intel_arch_perfmon.h>
int unknown_nmi_panic;
int nmi_watchdog_enabled;
int panic_on_unrecovered_nmi;
/* perfctr_nmi_owner tracks the ownership of the perfctr registers:
* evtsel_nmi_owner tracks the ownership of the event selection
* - different performance counters/ event selection may be reserved for

91
arch/x86_64/kernel/pci-dma.c
View file

@ -170,8 +170,20 @@ void dma_free_coherent(struct device *dev, size_t size,
}
EXPORT_SYMBOL(dma_free_coherent);
static int forbid_dac __read_mostly;
int dma_supported(struct device *dev, u64 mask)
{
#ifdef CONFIG_PCI
if (mask > 0xffffffff && forbid_dac > 0) {
printk(KERN_INFO "PCI: Disallowing DAC for device %s\n", dev->bus_id);
return 0;
}
#endif
if (dma_ops->dma_supported)
return dma_ops->dma_supported(dev, mask);
@ -231,57 +243,64 @@ EXPORT_SYMBOL(dma_set_mask);
allowed overwrite iommu off workarounds for specific chipsets.
soft Use software bounce buffering (default for Intel machines)
noaperture Don't touch the aperture for AGP.
allowdac Allow DMA >4GB
nodac Forbid DMA >4GB
panic Force panic when IOMMU overflows
*/
__init int iommu_setup(char *p)
{
iommu_merge = 1;
iommu_merge = 1;
if (!p)
return -EINVAL;
while (*p) {
if (!strncmp(p,"off",3))
no_iommu = 1;
/* gart_parse_options has more force support */
if (!strncmp(p,"force",5))
force_iommu = 1;
if (!strncmp(p,"noforce",7)) {
iommu_merge = 0;
force_iommu = 0;
}
while (*p) {
if (!strncmp(p,"off",3))
no_iommu = 1;
/* gart_parse_options has more force support */
if (!strncmp(p,"force",5))
force_iommu = 1;
if (!strncmp(p,"noforce",7)) {
iommu_merge = 0;
force_iommu = 0;
}
if (!strncmp(p, "biomerge",8)) {
iommu_bio_merge = 4096;
iommu_merge = 1;
force_iommu = 1;
}
if (!strncmp(p, "panic",5))
panic_on_overflow = 1;
if (!strncmp(p, "nopanic",7))
panic_on_overflow = 0;
if (!strncmp(p, "merge",5)) {
iommu_merge = 1;
force_iommu = 1;
}
if (!strncmp(p, "nomerge",7))
iommu_merge = 0;
if (!strncmp(p, "forcesac",8))
iommu_sac_force = 1;
if (!strncmp(p, "biomerge",8)) {
iommu_bio_merge = 4096;
iommu_merge = 1;
force_iommu = 1;
}
if (!strncmp(p, "panic",5))
panic_on_overflow = 1;
if (!strncmp(p, "nopanic",7))
panic_on_overflow = 0;
if (!strncmp(p, "merge",5)) {
iommu_merge = 1;
force_iommu = 1;
}
if (!strncmp(p, "nomerge",7))
iommu_merge = 0;
if (!strncmp(p, "forcesac",8))
iommu_sac_force = 1;
if (!strncmp(p, "allowdac", 8))
forbid_dac = 0;
if (!strncmp(p, "nodac", 5))
forbid_dac = -1;
#ifdef CONFIG_SWIOTLB
if (!strncmp(p, "soft",4))
swiotlb = 1;
if (!strncmp(p, "soft",4))
swiotlb = 1;
#endif
#ifdef CONFIG_IOMMU
gart_parse_options(p);
gart_parse_options(p);
#endif
p += strcspn(p, ",");
if (*p == ',')
++p;
}
return 0;
p += strcspn(p, ",");
if (*p == ',')
++p;
}
return 0;
}
early_param("iommu", iommu_setup);

11
arch/x86_64/kernel/setup.c
View file

@ -123,9 +123,6 @@ struct resource standard_io_resources[] = {
.flags = IORESOURCE_BUSY | IORESOURCE_IO }
};
#define STANDARD_IO_RESOURCES \
(sizeof standard_io_resources / sizeof standard_io_resources[0])
#define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
struct resource data_resource = {
@ -172,9 +169,6 @@ static struct resource adapter_rom_resources[] = {
.flags = IORESOURCE_ROM }
};
#define ADAPTER_ROM_RESOURCES \
(sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
static struct resource video_rom_resource = {
.name = "Video ROM",
.start = 0xc0000,
@ -245,7 +239,8 @@ static void __init probe_roms(void)
}
/* check for adapter roms on 2k boundaries */
for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper;
start += 2048) {
rom = isa_bus_to_virt(start);
if (!romsignature(rom))
continue;
@ -537,7 +532,7 @@ void __init setup_arch(char **cmdline_p)
{
unsigned i;
/* request I/O space for devices used on all i[345]86 PCs */
for (i = 0; i < STANDARD_IO_RESOURCES; i++)
for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
request_resource(&ioport_resource, &standard_io_resources[i]);
}

14
arch/x86_64/kernel/vmlinux.lds.S
View file

@ -67,13 +67,6 @@ SECTIONS
_edata = .; /* End of data section */
__bss_start = .; /* BSS */
.bss : AT(ADDR(.bss) - LOAD_OFFSET) {
*(.bss.page_aligned)
*(.bss)
}
__bss_stop = .;
. = ALIGN(PAGE_SIZE);
. = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
.data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
@ -229,6 +222,13 @@ SECTIONS
. = ALIGN(4096);
__nosave_end = .;
__bss_start = .; /* BSS */
.bss : AT(ADDR(.bss) - LOAD_OFFSET) {
*(.bss.page_aligned)
*(.bss)
}
__bss_stop = .;
_end = . ;
/* Sections to be discarded */

8
arch/x86_64/kernel/vsyscall.c
View file

@ -155,8 +155,8 @@ vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
We do this here because otherwise user space would do it on
its own in a likely inferior way (no access to jiffies).
If you don't like it pass NULL. */
if (tcache && tcache->t0 == (j = __jiffies)) {
p = tcache->t1;
if (tcache && tcache->blob[0] == (j = __jiffies)) {
p = tcache->blob[1];
} else if (__vgetcpu_mode == VGETCPU_RDTSCP) {
/* Load per CPU data from RDTSCP */
rdtscp(dummy, dummy, p);
@ -165,8 +165,8 @@ vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
asm("lsl %1,%0" : "=r" (p) : "r" (__PER_CPU_SEG));
}
if (tcache) {
tcache->t0 = j;
tcache->t1 = p;
tcache->blob[0] = j;
tcache->blob[1] = p;
}
if (cpu)
*cpu = p & 0xfff;

6
include/asm-i386/nmi.h
View file

@ -36,4 +36,10 @@ extern unsigned int nmi_watchdog;
#define NMI_LOCAL_APIC 2
#define NMI_INVALID 3
struct ctl_table;
struct file;
extern int proc_nmi_enabled(struct ctl_table *, int , struct file *,
void __user *, size_t *, loff_t *);
extern int unknown_nmi_panic;
#endif /* ASM_NMI_H */

7
include/asm-x86_64/nmi.h
View file

@ -70,4 +70,11 @@ extern unsigned int nmi_watchdog;
#define NMI_LOCAL_APIC 2
#define NMI_INVALID 3
struct ctl_table;
struct file;
extern int proc_nmi_enabled(struct ctl_table *, int , struct file *,
void __user *, size_t *, loff_t *);
extern int unknown_nmi_panic;
#endif /* ASM_NMI_H */

4
include/asm-x86_64/semaphore.h
View file

@ -132,7 +132,7 @@ static inline int down_interruptible(struct semaphore * sem)
"jns 2f\n\t"
"call __down_failed_interruptible\n"
"2:\n"
:"=a" (result), "=m" (sem->count)
:"=&a" (result), "=m" (sem->count)
:"D" (sem)
:"memory");
return result;
@ -153,7 +153,7 @@ static inline int down_trylock(struct semaphore * sem)
"jns 2f\n\t"
"call __down_failed_trylock\n\t"
"2:\n"
:"=a" (result), "=m" (sem->count)
:"=&a" (result), "=m" (sem->count)
:"D" (sem)
:"memory","cc");
return result;

7
include/asm-x86_64/uaccess.h
View file

@ -361,6 +361,11 @@ __must_check unsigned long clear_user(void __user *mem, unsigned long len);
__must_check unsigned long __clear_user(void __user *mem, unsigned long len);
__must_check long __copy_from_user_inatomic(void *dst, const void __user *src, unsigned size);
#define __copy_to_user_inatomic copy_user_generic
static __must_check __always_inline int
__copy_to_user_inatomic(void __user *dst, const void *src, unsigned size)
{
return copy_user_generic((__force void *)dst, src, size);
}
#endif /* __X86_64_UACCESS_H */

12
include/linux/getcpu.h
View file

@ -1,16 +1,18 @@
#ifndef _LINUX_GETCPU_H
#define _LINUX_GETCPU_H 1
/* Cache for getcpu() to speed it up. Results might be upto a jiffie
/* Cache for getcpu() to speed it up. Results might be a short time
out of date, but will be faster.
User programs should not refer to the contents of this structure.
It is only a cache for vgetcpu(). It might change in future kernels.
I repeat they should not refer to it. If they do they will break
in future kernels.
It is only a private cache for vgetcpu(). It will change in future kernels.
The user program must store this information per thread (__thread)
If you want 100% accurate information pass NULL instead. */
struct getcpu_cache {
unsigned long t0;
unsigned long t1;
unsigned long res[4];
unsigned long blob[128 / sizeof(long)];
};
#endif

1
kernel/panic.c
View file

@ -21,7 +21,6 @@
#include <linux/debug_locks.h>
int panic_on_oops;
int panic_on_unrecovered_nmi;
int tainted;
static int pause_on_oops;
static int pause_on_oops_flag;

8
kernel/sys.c
View file

@ -2083,12 +2083,12 @@ asmlinkage long sys_getcpu(unsigned __user *cpup, unsigned __user *nodep,
* padding
*/
unsigned long t0, t1;
get_user(t0, &cache->t0);
get_user(t1, &cache->t1);
get_user(t0, &cache->blob[0]);
get_user(t1, &cache->blob[1]);
t0++;
t1++;
put_user(t0, &cache->t0);
put_user(t1, &cache->t1);
put_user(t0, &cache->blob[0]);
put_user(t1, &cache->blob[1]);
}
return err ? -EFAULT : 0;
}

11
kernel/sysctl.c
View file

@ -52,6 +52,10 @@
extern int proc_nr_files(ctl_table *table, int write, struct file *filp,
void __user *buffer, size_t *lenp, loff_t *ppos);
#ifdef CONFIG_X86
#include <asm/nmi.h>
#endif
#if defined(CONFIG_SYSCTL)
/* External variables not in a header file. */
@ -74,13 +78,6 @@ extern int sysctl_drop_caches;
extern int percpu_pagelist_fraction;
extern int compat_log;
#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
int unknown_nmi_panic;
int nmi_watchdog_enabled;
extern int proc_nmi_enabled(struct ctl_table *, int , struct file *,
void __user *, size_t *, loff_t *);
#endif
/* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
static int maxolduid = 65535;
static int minolduid;