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

Pull x86 updates from Ingo Molnar.

This touches some non-x86 files due to the sanitized INLINE_SPIN_UNLOCK
config usage.

Fixed up trivial conflicts due to just header include changes (removing
headers due to cpu_idle() merge clashing with the <asm/system.h> split).

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/apic/amd: Be more verbose about LVT offset assignments
  x86, tls: Off by one limit check
  x86/ioapic: Add io_apic_ops driver layer to allow interception
  x86/olpc: Add debugfs interface for EC commands
  x86: Merge the x86_32 and x86_64 cpu_idle() functions
  x86/kconfig: Remove CONFIG_TR=y from the defconfigs
  x86: Stop recursive fault in print_context_stack after stack overflow
  x86/io_apic: Move and reenable irq only when CONFIG_GENERIC_PENDING_IRQ=y
  x86/apic: Add separate apic_id_valid() functions for selected apic drivers
  locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
  x86/kconfig: Update defconfigs
  x86: Fix excessive MSR print out when show_msr is not specified
This commit is contained in:
Linus Torvalds 2012-03-29 14:28:26 -07:00
parent bcd550745f 8abc3122aa
commit 6b8212a313
29 changed files with 437 additions and 322 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/ABI/testing/debugfs-olpc Normal file
View File

@ -0,0 +1,16 @@
What: /sys/kernel/debug/olpc-ec/cmd
Date: Dec 2011
KernelVersion: 3.4
Contact: devel@lists.laptop.org
Description:
A generic interface for executing OLPC Embedded Controller commands and
reading their responses.
To execute a command, write data with the format: CC:N A A A A
CC is the (hex) command, N is the count of expected reply bytes, and A A A A
are optional (hex) arguments.
To read the response (if any), read from the generic node after executing
a command. Hex reply bytes will be returned, *whether or not* they came from
the immediately previous command.

2
arch/mips/configs/db1300_defconfig
View File

@ -133,7 +133,7 @@ CONFIG_BLK_DEV_BSG=y
CONFIG_IOSCHED_NOOP=y
CONFIG_DEFAULT_NOOP=y
CONFIG_DEFAULT_IOSCHED="noop"
CONFIG_INLINE_SPIN_UNLOCK=y
# CONFIG_UNINLINE_SPIN_UNLOCK is not set
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y

66
arch/x86/configs/i386_defconfig
View File

@ -15,23 +15,28 @@ CONFIG_CPUSETS=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
CONFIG_CGROUP_SCHED=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_KALLSYMS_EXTRA_PASS=y
# CONFIG_COMPAT_BRK is not set
CONFIG_PROFILING=y
CONFIG_KPROBES=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
CONFIG_MAC_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
CONFIG_SGI_PARTITION=y
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_SMP=y
CONFIG_SPARSE_IRQ=y
CONFIG_X86_GENERIC=y
CONFIG_HPET_TIMER=y
CONFIG_SCHED_SMT=y
@ -51,14 +56,12 @@ CONFIG_HZ_1000=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
# CONFIG_COMPAT_VDSO is not set
CONFIG_PM=y
CONFIG_HIBERNATION=y
CONFIG_PM_DEBUG=y
CONFIG_PM_TRACE_RTC=y
CONFIG_HIBERNATION=y
CONFIG_ACPI_PROCFS=y
CONFIG_ACPI_DOCK=y
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_DEBUG=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
@ -69,7 +72,6 @@ CONFIG_PCI_MSI=y
CONFIG_PCCARD=y
CONFIG_YENTA=y
CONFIG_HOTPLUG_PCI=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_BINFMT_MISC=y
CONFIG_NET=y
CONFIG_PACKET=y
@ -120,7 +122,6 @@ CONFIG_NF_CONNTRACK_IPV4=y
CONFIG_IP_NF_IPTABLES=y
CONFIG_IP_NF_FILTER=y
CONFIG_IP_NF_TARGET_REJECT=y
CONFIG_IP_NF_TARGET_LOG=y
CONFIG_IP_NF_TARGET_ULOG=y
CONFIG_NF_NAT=y
CONFIG_IP_NF_TARGET_MASQUERADE=y
@ -128,7 +129,6 @@ CONFIG_IP_NF_MANGLE=y
CONFIG_NF_CONNTRACK_IPV6=y
CONFIG_IP6_NF_IPTABLES=y
CONFIG_IP6_NF_MATCH_IPV6HEADER=y
CONFIG_IP6_NF_TARGET_LOG=y
CONFIG_IP6_NF_FILTER=y
CONFIG_IP6_NF_TARGET_REJECT=y
CONFIG_IP6_NF_MANGLE=y
@ -169,25 +169,20 @@ CONFIG_DM_ZERO=y
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
CONFIG_NETCONSOLE=y
CONFIG_BNX2=y
CONFIG_TIGON3=y
CONFIG_NET_TULIP=y
CONFIG_NET_PCI=y
CONFIG_FORCEDETH=y
CONFIG_E100=y
CONFIG_NE2K_PCI=y
CONFIG_8139TOO=y
# CONFIG_8139TOO_PIO is not set
CONFIG_E1000=y
CONFIG_E1000E=y
CONFIG_R8169=y
CONFIG_SKY2=y
CONFIG_TIGON3=y
CONFIG_BNX2=y
CONFIG_TR=y
CONFIG_NET_PCMCIA=y
CONFIG_NE2K_PCI=y
CONFIG_FORCEDETH=y
CONFIG_8139TOO=y
# CONFIG_8139TOO_PIO is not set
CONFIG_R8169=y
CONFIG_FDDI=y
CONFIG_NETCONSOLE=y
CONFIG_INPUT_POLLDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_EVDEV=y
@ -196,6 +191,7 @@ CONFIG_INPUT_TABLET=y
CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_INPUT_MISC=y
CONFIG_VT_HW_CONSOLE_BINDING=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_SERIAL_NONSTANDARD=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
@ -205,7 +201,6 @@ CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_DETECT_IRQ=y
CONFIG_SERIAL_8250_RSA=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_HW_RANDOM=y
CONFIG_NVRAM=y
CONFIG_HPET=y
@ -220,7 +215,6 @@ CONFIG_DRM_I915=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y
CONFIG_FB_EFI=y
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_LOGO=y
@ -283,7 +277,6 @@ CONFIG_ZISOFS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_HUGETLBFS=y
CONFIG_NFS_FS=y
@ -291,18 +284,6 @@ CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
CONFIG_ROOT_NFS=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
CONFIG_MAC_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
CONFIG_SGI_PARTITION=y
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ASCII=y
@ -317,13 +298,12 @@ CONFIG_DEBUG_KERNEL=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
# CONFIG_RCU_CPU_STALL_DETECTOR is not set
CONFIG_DEBUG_STACK_USAGE=y
CONFIG_SYSCTL_SYSCALL_CHECK=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACK_USAGE=y
# CONFIG_DEBUG_RODATA_TEST is not set
CONFIG_DEBUG_NX_TEST=m
CONFIG_DEBUG_BOOT_PARAMS=y

67
arch/x86/configs/x86_64_defconfig
View File

@ -1,4 +1,3 @@
CONFIG_64BIT=y
CONFIG_EXPERIMENTAL=y
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SYSVIPC=y
@ -16,26 +15,29 @@ CONFIG_CPUSETS=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
CONFIG_CGROUP_SCHED=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_KALLSYMS_EXTRA_PASS=y
# CONFIG_COMPAT_BRK is not set
CONFIG_PROFILING=y
CONFIG_KPROBES=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
CONFIG_MAC_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
CONFIG_SGI_PARTITION=y
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_SMP=y
CONFIG_SPARSE_IRQ=y
CONFIG_CALGARY_IOMMU=y
CONFIG_AMD_IOMMU=y
CONFIG_AMD_IOMMU_STATS=y
CONFIG_NR_CPUS=64
CONFIG_SCHED_SMT=y
CONFIG_PREEMPT_VOLUNTARY=y
@ -53,27 +55,22 @@ CONFIG_HZ_1000=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
# CONFIG_COMPAT_VDSO is not set
CONFIG_PM=y
CONFIG_HIBERNATION=y
CONFIG_PM_DEBUG=y
CONFIG_PM_TRACE_RTC=y
CONFIG_HIBERNATION=y
CONFIG_ACPI_PROCFS=y
CONFIG_ACPI_DOCK=y
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_DEBUG=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_X86_ACPI_CPUFREQ=y
CONFIG_PCI_MMCONFIG=y
CONFIG_INTEL_IOMMU=y
# CONFIG_INTEL_IOMMU_DEFAULT_ON is not set
CONFIG_PCIEPORTBUS=y
CONFIG_PCCARD=y
CONFIG_YENTA=y
CONFIG_HOTPLUG_PCI=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_BINFMT_MISC=y
CONFIG_IA32_EMULATION=y
CONFIG_NET=y
@ -125,7 +122,6 @@ CONFIG_NF_CONNTRACK_IPV4=y
CONFIG_IP_NF_IPTABLES=y
CONFIG_IP_NF_FILTER=y
CONFIG_IP_NF_TARGET_REJECT=y
CONFIG_IP_NF_TARGET_LOG=y
CONFIG_IP_NF_TARGET_ULOG=y
CONFIG_NF_NAT=y
CONFIG_IP_NF_TARGET_MASQUERADE=y
@ -133,7 +129,6 @@ CONFIG_IP_NF_MANGLE=y
CONFIG_NF_CONNTRACK_IPV6=y
CONFIG_IP6_NF_IPTABLES=y
CONFIG_IP6_NF_MATCH_IPV6HEADER=y
CONFIG_IP6_NF_TARGET_LOG=y
CONFIG_IP6_NF_FILTER=y
CONFIG_IP6_NF_TARGET_REJECT=y
CONFIG_IP6_NF_MANGLE=y
@ -172,20 +167,15 @@ CONFIG_DM_ZERO=y
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
CONFIG_NETCONSOLE=y
CONFIG_TIGON3=y
CONFIG_NET_TULIP=y
CONFIG_NET_PCI=y
CONFIG_FORCEDETH=y
CONFIG_E100=y
CONFIG_8139TOO=y
CONFIG_E1000=y
CONFIG_SKY2=y
CONFIG_TIGON3=y
CONFIG_TR=y
CONFIG_NET_PCMCIA=y
CONFIG_FORCEDETH=y
CONFIG_8139TOO=y
CONFIG_FDDI=y
CONFIG_NETCONSOLE=y
CONFIG_INPUT_POLLDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_EVDEV=y
@ -194,6 +184,7 @@ CONFIG_INPUT_TABLET=y
CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_INPUT_MISC=y
CONFIG_VT_HW_CONSOLE_BINDING=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_SERIAL_NONSTANDARD=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
@ -203,7 +194,6 @@ CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_DETECT_IRQ=y
CONFIG_SERIAL_8250_RSA=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_INTEL is not set
# CONFIG_HW_RANDOM_AMD is not set
@ -221,7 +211,6 @@ CONFIG_DRM_I915_KMS=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y
CONFIG_FB_EFI=y
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_LOGO=y
@ -268,6 +257,10 @@ CONFIG_RTC_CLASS=y
# CONFIG_RTC_HCTOSYS is not set
CONFIG_DMADEVICES=y
CONFIG_EEEPC_LAPTOP=y
CONFIG_AMD_IOMMU=y
CONFIG_AMD_IOMMU_STATS=y
CONFIG_INTEL_IOMMU=y
# CONFIG_INTEL_IOMMU_DEFAULT_ON is not set
CONFIG_EFI_VARS=y
CONFIG_EXT3_FS=y
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
@ -284,7 +277,6 @@ CONFIG_ZISOFS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_HUGETLBFS=y
CONFIG_NFS_FS=y
@ -292,18 +284,6 @@ CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
CONFIG_ROOT_NFS=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
CONFIG_MAC_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
CONFIG_SGI_PARTITION=y
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ASCII=y
@ -317,13 +297,12 @@ CONFIG_DEBUG_KERNEL=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
# CONFIG_RCU_CPU_STALL_DETECTOR is not set
CONFIG_DEBUG_STACK_USAGE=y
CONFIG_SYSCTL_SYSCALL_CHECK=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACK_USAGE=y
# CONFIG_DEBUG_RODATA_TEST is not set
CONFIG_DEBUG_NX_TEST=m
CONFIG_DEBUG_BOOT_PARAMS=y

2
arch/x86/include/asm/apic.h
View File

@ -534,7 +534,7 @@ static inline unsigned int read_apic_id(void)
static inline int default_apic_id_valid(int apicid)
{
return x2apic_mode || (apicid < 255);
return (apicid < 255);
}
extern void default_setup_apic_routing(void);

1
arch/x86/include/asm/idle.h
View File

@ -14,6 +14,7 @@ void exit_idle(void);
#else /* !CONFIG_X86_64 */
static inline void enter_idle(void) { }
static inline void exit_idle(void) { }
static inline void __exit_idle(void) { }
#endif /* CONFIG_X86_64 */
void amd_e400_remove_cpu(int cpu);

9
arch/x86/include/asm/io_apic.h
View File

@ -21,6 +21,15 @@
#define IO_APIC_REDIR_LEVEL_TRIGGER (1 << 15)
#define IO_APIC_REDIR_MASKED (1 << 16)
struct io_apic_ops {
void (*init) (void);
unsigned int (*read) (unsigned int apic, unsigned int reg);
void (*write) (unsigned int apic, unsigned int reg, unsigned int value);
void (*modify)(unsigned int apic, unsigned int reg, unsigned int value);
};
void __init set_io_apic_ops(const struct io_apic_ops *);
/*
* The structure of the IO-APIC:
*/

5
arch/x86/include/asm/x2apic.h
View File

@ -18,6 +18,11 @@ static const struct cpumask *x2apic_target_cpus(void)
return cpu_online_mask;
}
static int x2apic_apic_id_valid(int apicid)
{
return 1;
}
static int x2apic_apic_id_registered(void)
{
return 1;

2
arch/x86/kernel/acpi/boot.c
View File

@ -239,7 +239,7 @@ acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
* to not preallocating memory for all NR_CPUS
* when we use CPU hotplug.
*/
if (!cpu_has_x2apic && (apic_id >= 0xff) && enabled)
if (!apic->apic_id_valid(apic_id) && enabled)
printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
else
acpi_register_lapic(apic_id, enabled);

13
arch/x86/kernel/apic/apic.c
View File

@ -383,20 +383,25 @@ static inline int eilvt_entry_is_changeable(unsigned int old, unsigned int new)
static unsigned int reserve_eilvt_offset(int offset, unsigned int new)
{
unsigned int rsvd; /* 0: uninitialized */
unsigned int rsvd, vector;
if (offset >= APIC_EILVT_NR_MAX)
return ~0;
rsvd = atomic_read(&eilvt_offsets[offset]) & ~APIC_EILVT_MASKED;
rsvd = atomic_read(&eilvt_offsets[offset]);
do {
if (rsvd &&
!eilvt_entry_is_changeable(rsvd, new))
vector = rsvd & ~APIC_EILVT_MASKED; /* 0: unassigned */
if (vector && !eilvt_entry_is_changeable(vector, new))
/* may not change if vectors are different */
return rsvd;
rsvd = atomic_cmpxchg(&eilvt_offsets[offset], rsvd, new);
} while (rsvd != new);
rsvd &= ~APIC_EILVT_MASKED;
if (rsvd && rsvd != vector)
pr_info("LVT offset %d assigned for vector 0x%02x\n",
offset, rsvd);
return new;
}

3
arch/x86/kernel/apic/apic_numachip.c
View File

@ -229,11 +229,10 @@ static int __init numachip_system_init(void)
}
early_initcall(numachip_system_init);
static int __cpuinit numachip_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
static int numachip_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
if (!strncmp(oem_id, "NUMASC", 6)) {
numachip_system = 1;
setup_force_cpu_cap(X86_FEATURE_X2APIC);
return 1;
}

159
arch/x86/kernel/apic/io_apic.c
View File

@ -64,9 +64,28 @@
#include <asm/apic.h>
#define __apicdebuginit(type) static type __init
#define for_each_irq_pin(entry, head) \
for (entry = head; entry; entry = entry->next)
static void __init __ioapic_init_mappings(void);
static unsigned int __io_apic_read (unsigned int apic, unsigned int reg);
static void __io_apic_write (unsigned int apic, unsigned int reg, unsigned int val);
static void __io_apic_modify(unsigned int apic, unsigned int reg, unsigned int val);
static struct io_apic_ops io_apic_ops = {
.init = __ioapic_init_mappings,
.read = __io_apic_read,
.write = __io_apic_write,
.modify = __io_apic_modify,
};
void __init set_io_apic_ops(const struct io_apic_ops *ops)
{
io_apic_ops = *ops;
}
/*
* Is the SiS APIC rmw bug present ?
* -1 = don't know, 0 = no, 1 = yes
@ -294,6 +313,22 @@ static void free_irq_at(unsigned int at, struct irq_cfg *cfg)
irq_free_desc(at);
}
static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
{
return io_apic_ops.read(apic, reg);
}
static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
{
io_apic_ops.write(apic, reg, value);
}
static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
io_apic_ops.modify(apic, reg, value);
}
struct io_apic {
unsigned int index;
unsigned int unused[3];
@ -314,16 +349,17 @@ static inline void io_apic_eoi(unsigned int apic, unsigned int vector)
writel(vector, &io_apic->eoi);
}
static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
static unsigned int __io_apic_read(unsigned int apic, unsigned int reg)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
writel(reg, &io_apic->index);
return readl(&io_apic->data);
}
static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
static void __io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
writel(reg, &io_apic->index);
writel(value, &io_apic->data);
}
@ -334,7 +370,7 @@ static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned i
*
* Older SiS APIC requires we rewrite the index register
*/
static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
static void __io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
@ -377,6 +413,7 @@ static struct IO_APIC_route_entry __ioapic_read_entry(int apic, int pin)
eu.w1 = io_apic_read(apic, 0x10 + 2 * pin);
eu.w2 = io_apic_read(apic, 0x11 + 2 * pin);
return eu.entry;
}
@ -384,9 +421,11 @@ static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin)
{
union entry_union eu;
unsigned long flags;
raw_spin_lock_irqsave(&ioapic_lock, flags);
eu.entry = __ioapic_read_entry(apic, pin);
raw_spin_unlock_irqrestore(&ioapic_lock, flags);
return eu.entry;
}
@ -396,8 +435,7 @@ static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin)
* the interrupt, and we need to make sure the entry is fully populated
* before that happens.
*/
static void
__ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
static void __ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
{
union entry_union eu = {{0, 0}};
@ -409,6 +447,7 @@ __ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
{
unsigned long flags;
raw_spin_lock_irqsave(&ioapic_lock, flags);
__ioapic_write_entry(apic, pin, e);
raw_spin_unlock_irqrestore(&ioapic_lock, flags);
@ -435,8 +474,7 @@ static void ioapic_mask_entry(int apic, int pin)
* shared ISA-space IRQs, so we have to support them. We are super
* fast in the common case, and fast for shared ISA-space IRQs.
*/
static int
__add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin)
static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin)
{
struct irq_pin_list **last, *entry;
@ -521,6 +559,7 @@ static void io_apic_sync(struct irq_pin_list *entry)
* a dummy read from the IO-APIC
*/
struct io_apic __iomem *io_apic;
io_apic = io_apic_base(entry->apic);
readl(&io_apic->data);
}
@ -2512,20 +2551,72 @@ static void ack_apic_edge(struct irq_data *data)
atomic_t irq_mis_count;
#ifdef CONFIG_GENERIC_PENDING_IRQ
static inline bool ioapic_irqd_mask(struct irq_data *data, struct irq_cfg *cfg)
{
/* If we are moving the irq we need to mask it */
if (unlikely(irqd_is_setaffinity_pending(data))) {
mask_ioapic(cfg);
return true;
}
return false;
}
static inline void ioapic_irqd_unmask(struct irq_data *data,
struct irq_cfg *cfg, bool masked)
{
if (unlikely(masked)) {
/* Only migrate the irq if the ack has been received.
*
* On rare occasions the broadcast level triggered ack gets
* delayed going to ioapics, and if we reprogram the
* vector while Remote IRR is still set the irq will never
* fire again.
*
* To prevent this scenario we read the Remote IRR bit
* of the ioapic. This has two effects.
* - On any sane system the read of the ioapic will
* flush writes (and acks) going to the ioapic from
* this cpu.
* - We get to see if the ACK has actually been delivered.
*
* Based on failed experiments of reprogramming the
* ioapic entry from outside of irq context starting
* with masking the ioapic entry and then polling until
* Remote IRR was clear before reprogramming the
* ioapic I don't trust the Remote IRR bit to be
* completey accurate.
*
* However there appears to be no other way to plug
* this race, so if the Remote IRR bit is not
* accurate and is causing problems then it is a hardware bug
* and you can go talk to the chipset vendor about it.
*/
if (!io_apic_level_ack_pending(cfg))
irq_move_masked_irq(data);
unmask_ioapic(cfg);
}
}
#else
static inline bool ioapic_irqd_mask(struct irq_data *data, struct irq_cfg *cfg)
{
return false;
}
static inline void ioapic_irqd_unmask(struct irq_data *data,
struct irq_cfg *cfg, bool masked)
{
}
#endif
static void ack_apic_level(struct irq_data *data)
{
struct irq_cfg *cfg = data->chip_data;
int i, do_unmask_irq = 0, irq = data->irq;
int i, irq = data->irq;
unsigned long v;
bool masked;
irq_complete_move(cfg);
#ifdef CONFIG_GENERIC_PENDING_IRQ
/* If we are moving the irq we need to mask it */
if (unlikely(irqd_is_setaffinity_pending(data))) {
do_unmask_irq = 1;
mask_ioapic(cfg);
}
#endif
masked = ioapic_irqd_mask(data, cfg);
/*
* It appears there is an erratum which affects at least version 0x11
@ -2581,38 +2672,7 @@ static void ack_apic_level(struct irq_data *data)
eoi_ioapic_irq(irq, cfg);
}
/* Now we can move and renable the irq */
if (unlikely(do_unmask_irq)) {
/* Only migrate the irq if the ack has been received.
*
* On rare occasions the broadcast level triggered ack gets
* delayed going to ioapics, and if we reprogram the
* vector while Remote IRR is still set the irq will never
* fire again.
*
* To prevent this scenario we read the Remote IRR bit
* of the ioapic. This has two effects.
* - On any sane system the read of the ioapic will
* flush writes (and acks) going to the ioapic from
* this cpu.
* - We get to see if the ACK has actually been delivered.
*
* Based on failed experiments of reprogramming the
* ioapic entry from outside of irq context starting
* with masking the ioapic entry and then polling until
* Remote IRR was clear before reprogramming the
* ioapic I don't trust the Remote IRR bit to be
* completey accurate.
*
* However there appears to be no other way to plug
* this race, so if the Remote IRR bit is not
* accurate and is causing problems then it is a hardware bug
* and you can go talk to the chipset vendor about it.
*/
if (!io_apic_level_ack_pending(cfg))
irq_move_masked_irq(data);
unmask_ioapic(cfg);
}
ioapic_irqd_unmask(data, cfg, masked);
}
#ifdef CONFIG_IRQ_REMAP
@ -3872,6 +3932,11 @@ static struct resource * __init ioapic_setup_resources(int nr_ioapics)
}
void __init ioapic_and_gsi_init(void)
{
io_apic_ops.init();
}
static void __init __ioapic_init_mappings(void)
{
unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
struct resource *ioapic_res;

2
arch/x86/kernel/apic/x2apic_cluster.c
View File

@ -213,7 +213,7 @@ static struct apic apic_x2apic_cluster = {
.name = "cluster x2apic",
.probe = x2apic_cluster_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
.apic_id_valid = default_apic_id_valid,
.apic_id_valid = x2apic_apic_id_valid,
.apic_id_registered = x2apic_apic_id_registered,
.irq_delivery_mode = dest_LowestPrio,

2
arch/x86/kernel/apic/x2apic_phys.c
View File

@ -119,7 +119,7 @@ static struct apic apic_x2apic_phys = {
.name = "physical x2apic",
.probe = x2apic_phys_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
.apic_id_valid = default_apic_id_valid,
.apic_id_valid = x2apic_apic_id_valid,
.apic_id_registered = x2apic_apic_id_registered,
.irq_delivery_mode = dest_Fixed,

7
arch/x86/kernel/apic/x2apic_uv_x.c
View File

@ -266,6 +266,11 @@ static void uv_send_IPI_all(int vector)
uv_send_IPI_mask(cpu_online_mask, vector);
}
static int uv_apic_id_valid(int apicid)
{
return 1;
}
static int uv_apic_id_registered(void)
{
return 1;
@ -351,7 +356,7 @@ static struct apic __refdata apic_x2apic_uv_x = {
.name = "UV large system",
.probe = uv_probe,
.acpi_madt_oem_check = uv_acpi_madt_oem_check,
.apic_id_valid = default_apic_id_valid,
.apic_id_valid = uv_apic_id_valid,
.apic_id_registered = uv_apic_id_registered,
.irq_delivery_mode = dest_Fixed,

2
arch/x86/kernel/cpu/common.c
View File

@ -999,7 +999,7 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
else
printk(KERN_CONT "\n");
__print_cpu_msr();
print_cpu_msr(c);
}
void __cpuinit print_cpu_msr(struct cpuinfo_x86 *c)

7
arch/x86/kernel/dumpstack.c
View File

@ -37,13 +37,16 @@ print_ftrace_graph_addr(unsigned long addr, void *data,
const struct stacktrace_ops *ops,
struct thread_info *tinfo, int *graph)
{
struct task_struct *task = tinfo->task;
struct task_struct *task;
unsigned long ret_addr;
int index = task->curr_ret_stack;
int index;
if (addr != (unsigned long)return_to_handler)
return;
task = tinfo->task;
index = task->curr_ret_stack;
if (!task->ret_stack || index < *graph)
return;

114
arch/x86/kernel/process.c
View File

@ -12,6 +12,9 @@
#include <linux/user-return-notifier.h>
#include <linux/dmi.h>
#include <linux/utsname.h>
#include <linux/stackprotector.h>
#include <linux/tick.h>
#include <linux/cpuidle.h>
#include <trace/events/power.h>
#include <linux/hw_breakpoint.h>
#include <asm/cpu.h>
@ -22,6 +25,24 @@
#include <asm/i387.h>
#include <asm/fpu-internal.h>
#include <asm/debugreg.h>
#include <asm/nmi.h>
#ifdef CONFIG_X86_64
static DEFINE_PER_CPU(unsigned char, is_idle);
static ATOMIC_NOTIFIER_HEAD(idle_notifier);
void idle_notifier_register(struct notifier_block *n)
{
atomic_notifier_chain_register(&idle_notifier, n);
}
EXPORT_SYMBOL_GPL(idle_notifier_register);
void idle_notifier_unregister(struct notifier_block *n)
{
atomic_notifier_chain_unregister(&idle_notifier, n);
}
EXPORT_SYMBOL_GPL(idle_notifier_unregister);
#endif
struct kmem_cache *task_xstate_cachep;
EXPORT_SYMBOL_GPL(task_xstate_cachep);
@ -370,6 +391,99 @@ static inline int hlt_use_halt(void)
}
#endif
#ifndef CONFIG_SMP
static inline void play_dead(void)
{
BUG();
}
#endif
#ifdef CONFIG_X86_64
void enter_idle(void)
{
percpu_write(is_idle, 1);
atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
}
static void __exit_idle(void)
{
if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
return;
atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
}
/* Called from interrupts to signify idle end */
void exit_idle(void)
{
/* idle loop has pid 0 */
if (current->pid)
return;
__exit_idle();
}
#endif
/*
* The idle thread. There's no useful work to be
* done, so just try to conserve power and have a
* low exit latency (ie sit in a loop waiting for
* somebody to say that they'd like to reschedule)
*/
void cpu_idle(void)
{
/*
* If we're the non-boot CPU, nothing set the stack canary up
* for us. CPU0 already has it initialized but no harm in
* doing it again. This is a good place for updating it, as
* we wont ever return from this function (so the invalid
* canaries already on the stack wont ever trigger).
*/
boot_init_stack_canary();
current_thread_info()->status |= TS_POLLING;
while (1) {
tick_nohz_idle_enter();
while (!need_resched()) {
rmb();
if (cpu_is_offline(smp_processor_id()))
play_dead();
/*
* Idle routines should keep interrupts disabled
* from here on, until they go to idle.
* Otherwise, idle callbacks can misfire.
*/
local_touch_nmi();
local_irq_disable();
enter_idle();
/* Don't trace irqs off for idle */
stop_critical_timings();
/* enter_idle() needs rcu for notifiers */
rcu_idle_enter();
if (cpuidle_idle_call())
pm_idle();
rcu_idle_exit();
start_critical_timings();
/* In many cases the interrupt that ended idle
has already called exit_idle. But some idle
loops can be woken up without interrupt. */
__exit_idle();
}
tick_nohz_idle_exit();
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
/*
* We use this if we don't have any better
* idle routine..

58
arch/x86/kernel/process_32.c
View File

@ -9,7 +9,6 @@
* This file handles the architecture-dependent parts of process handling..
*/
#include <linux/stackprotector.h>
#include <linux/cpu.h>
#include <linux/errno.h>
#include <linux/sched.h>
@ -31,14 +30,12 @@
#include <linux/kallsyms.h>
#include <linux/ptrace.h>
#include <linux/personality.h>
#include <linux/tick.h>
#include <linux/percpu.h>
#include <linux/prctl.h>
#include <linux/ftrace.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/kdebug.h>
#include <linux/cpuidle.h>
#include <asm/pgtable.h>
#include <asm/ldt.h>
@ -57,7 +54,6 @@
#include <asm/idle.h>
#include <asm/syscalls.h>
#include <asm/debugreg.h>
#include <asm/nmi.h>
#include <asm/switch_to.h>
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
@ -70,60 +66,6 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
return ((unsigned long *)tsk->thread.sp)[3];
}
#ifndef CONFIG_SMP
static inline void play_dead(void)
{
BUG();
}
#endif
/*
* The idle thread. There's no useful work to be
* done, so just try to conserve power and have a
* low exit latency (ie sit in a loop waiting for
* somebody to say that they'd like to reschedule)
*/
void cpu_idle(void)
{
int cpu = smp_processor_id();
/*
* If we're the non-boot CPU, nothing set the stack canary up
* for us. CPU0 already has it initialized but no harm in
* doing it again. This is a good place for updating it, as
* we wont ever return from this function (so the invalid
* canaries already on the stack wont ever trigger).
*/
boot_init_stack_canary();
current_thread_info()->status |= TS_POLLING;
/* endless idle loop with no priority at all */
while (1) {
tick_nohz_idle_enter();
rcu_idle_enter();
while (!need_resched()) {
check_pgt_cache();
rmb();
if (cpu_is_offline(cpu))
play_dead();
local_touch_nmi();
local_irq_disable();
/* Don't trace irqs off for idle */
stop_critical_timings();
if (cpuidle_idle_call())
pm_idle();
start_critical_timings();
}
rcu_idle_exit();
tick_nohz_idle_exit();
schedule_preempt_disabled();
}
}
void __show_regs(struct pt_regs *regs, int all)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;

107
arch/x86/kernel/process_64.c
View File

@ -14,7 +14,6 @@
* This file handles the architecture-dependent parts of process handling..
*/
#include <linux/stackprotector.h>
#include <linux/cpu.h>
#include <linux/errno.h>
#include <linux/sched.h>
@ -32,12 +31,10 @@
#include <linux/notifier.h>
#include <linux/kprobes.h>
#include <linux/kdebug.h>
#include <linux/tick.h>
#include <linux/prctl.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/ftrace.h>
#include <linux/cpuidle.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
@ -51,115 +48,11 @@
#include <asm/idle.h>
#include <asm/syscalls.h>
#include <asm/debugreg.h>
#include <asm/nmi.h>
#include <asm/switch_to.h>
asmlinkage extern void ret_from_fork(void);
DEFINE_PER_CPU(unsigned long, old_rsp);
static DEFINE_PER_CPU(unsigned char, is_idle);
static ATOMIC_NOTIFIER_HEAD(idle_notifier);
void idle_notifier_register(struct notifier_block *n)
{
atomic_notifier_chain_register(&idle_notifier, n);
}
EXPORT_SYMBOL_GPL(idle_notifier_register);
void idle_notifier_unregister(struct notifier_block *n)
{
atomic_notifier_chain_unregister(&idle_notifier, n);
}
EXPORT_SYMBOL_GPL(idle_notifier_unregister);
void enter_idle(void)
{
percpu_write(is_idle, 1);
atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
}
static void __exit_idle(void)
{
if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
return;
atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
}
/* Called from interrupts to signify idle end */
void exit_idle(void)
{
/* idle loop has pid 0 */
if (current->pid)
return;
__exit_idle();
}
#ifndef CONFIG_SMP
static inline void play_dead(void)
{
BUG();
}
#endif
/*
* The idle thread. There's no useful work to be
* done, so just try to conserve power and have a
* low exit latency (ie sit in a loop waiting for
* somebody to say that they'd like to reschedule)
*/
void cpu_idle(void)
{
current_thread_info()->status |= TS_POLLING;
/*
* If we're the non-boot CPU, nothing set the stack canary up
* for us. CPU0 already has it initialized but no harm in
* doing it again. This is a good place for updating it, as
* we wont ever return from this function (so the invalid
* canaries already on the stack wont ever trigger).
*/
boot_init_stack_canary();
/* endless idle loop with no priority at all */
while (1) {
tick_nohz_idle_enter();
while (!need_resched()) {
rmb();
if (cpu_is_offline(smp_processor_id()))
play_dead();
/*
* Idle routines should keep interrupts disabled
* from here on, until they go to idle.
* Otherwise, idle callbacks can misfire.
*/
local_touch_nmi();
local_irq_disable();
enter_idle();
/* Don't trace irqs off for idle */
stop_critical_timings();
/* enter_idle() needs rcu for notifiers */
rcu_idle_enter();
if (cpuidle_idle_call())
pm_idle();
rcu_idle_exit();
start_critical_timings();
/* In many cases the interrupt that ended idle
has already called exit_idle. But some idle
loops can be woken up without interrupt. */
__exit_idle();
}
tick_nohz_idle_exit();
schedule_preempt_disabled();
}
}
/* Prints also some state that isn't saved in the pt_regs */
void __show_regs(struct pt_regs *regs, int all)

4
arch/x86/kernel/tls.c
View File

@ -162,7 +162,7 @@ int regset_tls_get(struct task_struct *target, const struct user_regset *regset,
{
const struct desc_struct *tls;
if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct user_desc) ||
if (pos >= GDT_ENTRY_TLS_ENTRIES * sizeof(struct user_desc) ||
(pos % sizeof(struct user_desc)) != 0 ||
(count % sizeof(struct user_desc)) != 0)
return -EINVAL;
@ -197,7 +197,7 @@ int regset_tls_set(struct task_struct *target, const struct user_regset *regset,
struct user_desc infobuf[GDT_ENTRY_TLS_ENTRIES];
const struct user_desc *info;
if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct user_desc) ||
if (pos >= GDT_ENTRY_TLS_ENTRIES * sizeof(struct user_desc) ||
(pos % sizeof(struct user_desc)) != 0 ||
(count % sizeof(struct user_desc)) != 0)
return -EINVAL;

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

@ -70,7 +70,7 @@ acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
return;
pxm = pa->proximity_domain;
apic_id = pa->apic_id;
if (!cpu_has_x2apic && (apic_id >= 0xff)) {
if (!apic->apic_id_valid(apic_id)) {
printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
pxm, apic_id);
return;

97
arch/x86/platform/olpc/olpc.c
View File

@ -20,6 +20,8 @@
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/syscore_ops.h>
#include <linux/debugfs.h>
#include <linux/mutex.h>
#include <asm/geode.h>
#include <asm/setup.h>
@ -31,6 +33,15 @@ EXPORT_SYMBOL_GPL(olpc_platform_info);
static DEFINE_SPINLOCK(ec_lock);
/* debugfs interface to EC commands */
#define EC_MAX_CMD_ARGS (5 + 1) /* cmd byte + 5 args */
#define EC_MAX_CMD_REPLY (8)
static struct dentry *ec_debugfs_dir;
static DEFINE_MUTEX(ec_debugfs_cmd_lock);
static unsigned char ec_debugfs_resp[EC_MAX_CMD_REPLY];
static unsigned int ec_debugfs_resp_bytes;
/* EC event mask to be applied during suspend (defining wakeup sources). */
static u16 ec_wakeup_mask;
@ -269,6 +280,91 @@ int olpc_ec_sci_query(u16 *sci_value)
}
EXPORT_SYMBOL_GPL(olpc_ec_sci_query);
static ssize_t ec_debugfs_cmd_write(struct file *file, const char __user *buf,
size_t size, loff_t *ppos)
{
int i, m;
unsigned char ec_cmd[EC_MAX_CMD_ARGS];
unsigned int ec_cmd_int[EC_MAX_CMD_ARGS];
char cmdbuf[64];
int ec_cmd_bytes;
mutex_lock(&ec_debugfs_cmd_lock);
size = simple_write_to_buffer(cmdbuf, sizeof(cmdbuf), ppos, buf, size);
m = sscanf(cmdbuf, "%x:%u %x %x %x %x %x", &ec_cmd_int[0],
&ec_debugfs_resp_bytes,
&ec_cmd_int[1], &ec_cmd_int[2], &ec_cmd_int[3],
&ec_cmd_int[4], &ec_cmd_int[5]);
if (m < 2 || ec_debugfs_resp_bytes > EC_MAX_CMD_REPLY) {
/* reset to prevent overflow on read */
ec_debugfs_resp_bytes = 0;
printk(KERN_DEBUG "olpc-ec: bad ec cmd: "
"cmd:response-count [arg1 [arg2 ...]]\n");
size = -EINVAL;
goto out;
}
/* convert scanf'd ints to char */
ec_cmd_bytes = m - 2;
for (i = 0; i <= ec_cmd_bytes; i++)
ec_cmd[i] = ec_cmd_int[i];
printk(KERN_DEBUG "olpc-ec: debugfs cmd 0x%02x with %d args "
"%02x %02x %02x %02x %02x, want %d returns\n",
ec_cmd[0], ec_cmd_bytes, ec_cmd[1], ec_cmd[2], ec_cmd[3],
ec_cmd[4], ec_cmd[5], ec_debugfs_resp_bytes);
olpc_ec_cmd(ec_cmd[0], (ec_cmd_bytes == 0) ? NULL : &ec_cmd[1],
ec_cmd_bytes, ec_debugfs_resp, ec_debugfs_resp_bytes);
printk(KERN_DEBUG "olpc-ec: response "
"%02x %02x %02x %02x %02x %02x %02x %02x (%d bytes expected)\n",
ec_debugfs_resp[0], ec_debugfs_resp[1], ec_debugfs_resp[2],
ec_debugfs_resp[3], ec_debugfs_resp[4], ec_debugfs_resp[5],
ec_debugfs_resp[6], ec_debugfs_resp[7], ec_debugfs_resp_bytes);
out:
mutex_unlock(&ec_debugfs_cmd_lock);
return size;
}
static ssize_t ec_debugfs_cmd_read(struct file *file, char __user *buf,
size_t size, loff_t *ppos)
{
unsigned int i, r;
char *rp;
char respbuf[64];
mutex_lock(&ec_debugfs_cmd_lock);
rp = respbuf;
rp += sprintf(rp, "%02x", ec_debugfs_resp[0]);
for (i = 1; i < ec_debugfs_resp_bytes; i++)
rp += sprintf(rp, ", %02x", ec_debugfs_resp[i]);
mutex_unlock(&ec_debugfs_cmd_lock);
rp += sprintf(rp, "\n");
r = rp - respbuf;
return simple_read_from_buffer(buf, size, ppos, respbuf, r);
}
static const struct file_operations ec_debugfs_genops = {
.write = ec_debugfs_cmd_write,
.read = ec_debugfs_cmd_read,
};
static void setup_debugfs(void)
{
ec_debugfs_dir = debugfs_create_dir("olpc-ec", 0);
if (ec_debugfs_dir == ERR_PTR(-ENODEV))
return;
debugfs_create_file("cmd", 0600, ec_debugfs_dir, NULL,
&ec_debugfs_genops);
}
static int olpc_ec_suspend(void)
{
return olpc_ec_mask_write(ec_wakeup_mask);
@ -372,6 +468,7 @@ static int __init olpc_init(void)
}
register_syscore_ops(&olpc_syscore_ops);
setup_debugfs();
return 0;
}

2
arch/xtensa/configs/iss_defconfig
View File

@ -113,7 +113,7 @@ CONFIG_DEFAULT_IOSCHED="noop"
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set
CONFIG_INLINE_SPIN_UNLOCK=y
# CONFIG_UNINLINE_SPIN_UNLOCK is not set
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set

2
include/linux/spinlock_api_smp.h
View File

@ -67,7 +67,7 @@ _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
#define _raw_spin_trylock_bh(lock) __raw_spin_trylock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK
#ifndef CONFIG_UNINLINE_SPIN_UNLOCK
#define _raw_spin_unlock(lock) __raw_spin_unlock(lock)
#endif

4
kernel/Kconfig.locks
View File

@ -124,8 +124,8 @@ config INLINE_SPIN_LOCK_IRQSAVE
def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
ARCH_INLINE_SPIN_LOCK_IRQSAVE
config INLINE_SPIN_UNLOCK
def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_SPIN_UNLOCK)
config UNINLINE_SPIN_UNLOCK
bool
config INLINE_SPIN_UNLOCK_BH
def_bool !DEBUG_SPINLOCK && ARCH_INLINE_SPIN_UNLOCK_BH

1
kernel/Kconfig.preempt
View File

@ -36,6 +36,7 @@ config PREEMPT_VOLUNTARY
config PREEMPT
bool "Preemptible Kernel (Low-Latency Desktop)"
select PREEMPT_COUNT
select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK
help
This option reduces the latency of the kernel by making
all kernel code (that is not executing in a critical section)

2
kernel/spinlock.c
View File

@ -163,7 +163,7 @@ void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
EXPORT_SYMBOL(_raw_spin_lock_bh);
#endif
#ifndef CONFIG_INLINE_SPIN_UNLOCK
#ifdef CONFIG_UNINLINE_SPIN_UNLOCK
void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
{
__raw_spin_unlock(lock);

1
lib/Kconfig.debug
View File

@ -499,6 +499,7 @@ config RT_MUTEX_TESTER
config DEBUG_SPINLOCK
bool "Spinlock and rw-lock debugging: basic checks"
depends on DEBUG_KERNEL
select UNINLINE_SPIN_UNLOCK
help
Say Y here and build SMP to catch missing spinlock initialization
and certain other kinds of spinlock errors commonly made. This is