Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
net/9p: Fix the msize calculation.
fs/9p: add 9P2000.L unlinkat operation
fs/9p: add 9P2000.L renameat operation
fs/9p: Always ask new inode in create
fs/9p: Clean-up get_protocol_version() to use strcmp
fs/9p: Fix invalid mount options/args
fs/9p: When doing inode lookup compare qid details and inode mode bits.
fs/9p: Fid is not valid after a failed clunk.
net/9p: Remove structure not used in the code
VirtIO can transfer VIRTQUEUE_NUM of pages.
Fix the size of receive buffer packing onto VirtIO ring.
9p: clean up packet dump code
fs/9p: remove rename work around in 9p
net/9p: fix client code to fail more gracefully on protocol error
diff --git a/Documentation/cgroups/cpuacct.txt b/Documentation/cgroups/cpuacct.txt
index 9ad85df..9d73cc0 100644
--- a/Documentation/cgroups/cpuacct.txt
+++ b/Documentation/cgroups/cpuacct.txt
@@ -23,7 +23,7 @@
# cd /sys/fs/cgroup
# mkdir g1
-# echo $$ > g1
+# echo $$ > g1/tasks
The above steps create a new group g1 and move the current shell
process (bash) into it. CPU time consumed by this bash and its children
diff --git a/Documentation/cgroups/cpusets.txt b/Documentation/cgroups/cpusets.txt
index 5b0d78e..5c51ed4 100644
--- a/Documentation/cgroups/cpusets.txt
+++ b/Documentation/cgroups/cpusets.txt
@@ -180,7 +180,7 @@
- cpuset.sched_load_balance flag: if set, load balance within CPUs on that cpuset
- cpuset.sched_relax_domain_level: the searching range when migrating tasks
-In addition, the root cpuset only has the following file:
+In addition, only the root cpuset has the following file:
- cpuset.memory_pressure_enabled flag: compute memory_pressure?
New cpusets are created using the mkdir system call or shell
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 5e7cb39..1c7fb0a 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -17,23 +17,21 @@
Currently, these files might (depending on your configuration)
show up in /proc/sys/kernel:
-- acpi_video_flags
+
- acct
+- acpi_video_flags
+- auto_msgmni
- bootloader_type [ X86 only ]
- bootloader_version [ X86 only ]
- callhome [ S390 only ]
-- auto_msgmni
- core_pattern
- core_pipe_limit
- core_uses_pid
- ctrl-alt-del
-- dentry-state
- dmesg_restrict
- domainname
- hostname
- hotplug
-- java-appletviewer [ binfmt_java, obsolete ]
-- java-interpreter [ binfmt_java, obsolete ]
- kptr_restrict
- kstack_depth_to_print [ X86 only ]
- l2cr [ PPC only ]
@@ -48,10 +46,14 @@
- overflowgid
- overflowuid
- panic
+- panic_on_oops
+- panic_on_unrecovered_nmi
- pid_max
- powersave-nap [ PPC only ]
-- panic_on_unrecovered_nmi
- printk
+- printk_delay
+- printk_ratelimit
+- printk_ratelimit_burst
- randomize_va_space
- real-root-dev ==> Documentation/initrd.txt
- reboot-cmd [ SPARC only ]
@@ -62,6 +64,7 @@
- shmall
- shmmax [ sysv ipc ]
- shmmni
+- softlockup_thresh
- stop-a [ SPARC only ]
- sysrq ==> Documentation/sysrq.txt
- tainted
@@ -71,15 +74,6 @@
==============================================================
-acpi_video_flags:
-
-flags
-
-See Doc*/kernel/power/video.txt, it allows mode of video boot to be
-set during run time.
-
-==============================================================
-
acct:
highwater lowwater frequency
@@ -97,6 +91,25 @@
==============================================================
+acpi_video_flags:
+
+flags
+
+See Doc*/kernel/power/video.txt, it allows mode of video boot to be
+set during run time.
+
+==============================================================
+
+auto_msgmni:
+
+Enables/Disables automatic recomputing of msgmni upon memory add/remove
+or upon ipc namespace creation/removal (see the msgmni description
+above). Echoing "1" into this file enables msgmni automatic recomputing.
+Echoing "0" turns it off. auto_msgmni default value is 1.
+
+
+==============================================================
+
bootloader_type:
x86 bootloader identification
@@ -172,22 +185,24 @@
core_pipe_limit:
-This sysctl is only applicable when core_pattern is configured to pipe core
-files to a user space helper (when the first character of core_pattern is a '|',
-see above). When collecting cores via a pipe to an application, it is
-occasionally useful for the collecting application to gather data about the
-crashing process from its /proc/pid directory. In order to do this safely, the
-kernel must wait for the collecting process to exit, so as not to remove the
-crashing processes proc files prematurely. This in turn creates the possibility
-that a misbehaving userspace collecting process can block the reaping of a
-crashed process simply by never exiting. This sysctl defends against that. It
-defines how many concurrent crashing processes may be piped to user space
-applications in parallel. If this value is exceeded, then those crashing
-processes above that value are noted via the kernel log and their cores are
-skipped. 0 is a special value, indicating that unlimited processes may be
-captured in parallel, but that no waiting will take place (i.e. the collecting
-process is not guaranteed access to /proc/<crashing pid>/). This value defaults
-to 0.
+This sysctl is only applicable when core_pattern is configured to pipe
+core files to a user space helper (when the first character of
+core_pattern is a '|', see above). When collecting cores via a pipe
+to an application, it is occasionally useful for the collecting
+application to gather data about the crashing process from its
+/proc/pid directory. In order to do this safely, the kernel must wait
+for the collecting process to exit, so as not to remove the crashing
+processes proc files prematurely. This in turn creates the
+possibility that a misbehaving userspace collecting process can block
+the reaping of a crashed process simply by never exiting. This sysctl
+defends against that. It defines how many concurrent crashing
+processes may be piped to user space applications in parallel. If
+this value is exceeded, then those crashing processes above that value
+are noted via the kernel log and their cores are skipped. 0 is a
+special value, indicating that unlimited processes may be captured in
+parallel, but that no waiting will take place (i.e. the collecting
+process is not guaranteed access to /proc/<crashing pid>/). This
+value defaults to 0.
==============================================================
@@ -218,14 +233,14 @@
dmesg_restrict:
-This toggle indicates whether unprivileged users are prevented from using
-dmesg(8) to view messages from the kernel's log buffer. When
-dmesg_restrict is set to (0) there are no restrictions. When
+This toggle indicates whether unprivileged users are prevented
+from using dmesg(8) to view messages from the kernel's log buffer.
+When dmesg_restrict is set to (0) there are no restrictions. When
dmesg_restrict is set set to (1), users must have CAP_SYSLOG to use
dmesg(8).
-The kernel config option CONFIG_SECURITY_DMESG_RESTRICT sets the default
-value of dmesg_restrict.
+The kernel config option CONFIG_SECURITY_DMESG_RESTRICT sets the
+default value of dmesg_restrict.
==============================================================
@@ -256,13 +271,6 @@
==============================================================
-l2cr: (PPC only)
-
-This flag controls the L2 cache of G3 processor boards. If
-0, the cache is disabled. Enabled if nonzero.
-
-==============================================================
-
kptr_restrict:
This toggle indicates whether restrictions are placed on
@@ -283,6 +291,13 @@
==============================================================
+l2cr: (PPC only)
+
+This flag controls the L2 cache of G3 processor boards. If
+0, the cache is disabled. Enabled if nonzero.
+
+==============================================================
+
modules_disabled:
A toggle value indicating if modules are allowed to be loaded
@@ -293,6 +308,21 @@
==============================================================
+nmi_watchdog:
+
+Enables/Disables the NMI watchdog on x86 systems. When the value is
+non-zero the NMI watchdog is enabled and will continuously test all
+online cpus to determine whether or not they are still functioning
+properly. Currently, passing "nmi_watchdog=" parameter at boot time is
+required for this function to work.
+
+If LAPIC NMI watchdog method is in use (nmi_watchdog=2 kernel
+parameter), the NMI watchdog shares registers with oprofile. By
+disabling the NMI watchdog, oprofile may have more registers to
+utilize.
+
+==============================================================
+
osrelease, ostype & version:
# cat osrelease
@@ -312,10 +342,10 @@
overflowgid & overflowuid:
-if your architecture did not always support 32-bit UIDs (i.e. arm, i386,
-m68k, sh, and sparc32), a fixed UID and GID will be returned to
-applications that use the old 16-bit UID/GID system calls, if the actual
-UID or GID would exceed 65535.
+if your architecture did not always support 32-bit UIDs (i.e. arm,
+i386, m68k, sh, and sparc32), a fixed UID and GID will be returned to
+applications that use the old 16-bit UID/GID system calls, if the
+actual UID or GID would exceed 65535.
These sysctls allow you to change the value of the fixed UID and GID.
The default is 65534.
@@ -324,9 +354,22 @@
panic:
-The value in this file represents the number of seconds the
-kernel waits before rebooting on a panic. When you use the
-software watchdog, the recommended setting is 60.
+The value in this file represents the number of seconds the kernel
+waits before rebooting on a panic. When you use the software watchdog,
+the recommended setting is 60.
+
+==============================================================
+
+panic_on_unrecovered_nmi:
+
+The default Linux behaviour on an NMI of either memory or unknown is
+to continue operation. For many environments such as scientific
+computing it is preferable that the box is taken out and the error
+dealt with than an uncorrected parity/ECC error get propagated.
+
+A small number of systems do generate NMI's for bizarre random reasons
+such as power management so the default is off. That sysctl works like
+the existing panic controls already in that directory.
==============================================================
@@ -376,6 +419,14 @@
==============================================================
+printk_delay:
+
+Delay each printk message in printk_delay milliseconds
+
+Value from 0 - 10000 is allowed.
+
+==============================================================
+
printk_ratelimit:
Some warning messages are rate limited. printk_ratelimit specifies
@@ -395,15 +446,7 @@
==============================================================
-printk_delay:
-
-Delay each printk message in printk_delay milliseconds
-
-Value from 0 - 10000 is allowed.
-
-==============================================================
-
-randomize-va-space:
+randomize_va_space:
This option can be used to select the type of process address
space randomization that is used in the system, for architectures
@@ -466,11 +509,11 @@
==============================================================
-shmmax:
+shmmax:
This value can be used to query and set the run time limit
on the maximum shared memory segment size that can be created.
-Shared memory segments up to 1Gb are now supported in the
+Shared memory segments up to 1Gb are now supported in the
kernel. This value defaults to SHMMAX.
==============================================================
@@ -484,7 +527,7 @@
==============================================================
-tainted:
+tainted:
Non-zero if the kernel has been tainted. Numeric values, which
can be ORed together:
@@ -509,49 +552,11 @@
==============================================================
-auto_msgmni:
-
-Enables/Disables automatic recomputing of msgmni upon memory add/remove or
-upon ipc namespace creation/removal (see the msgmni description above).
-Echoing "1" into this file enables msgmni automatic recomputing.
-Echoing "0" turns it off.
-auto_msgmni default value is 1.
-
-==============================================================
-
-nmi_watchdog:
-
-Enables/Disables the NMI watchdog on x86 systems. When the value is non-zero
-the NMI watchdog is enabled and will continuously test all online cpus to
-determine whether or not they are still functioning properly. Currently,
-passing "nmi_watchdog=" parameter at boot time is required for this function
-to work.
-
-If LAPIC NMI watchdog method is in use (nmi_watchdog=2 kernel parameter), the
-NMI watchdog shares registers with oprofile. By disabling the NMI watchdog,
-oprofile may have more registers to utilize.
-
-==============================================================
-
unknown_nmi_panic:
-The value in this file affects behavior of handling NMI. When the value is
-non-zero, unknown NMI is trapped and then panic occurs. At that time, kernel
-debugging information is displayed on console.
+The value in this file affects behavior of handling NMI. When the
+value is non-zero, unknown NMI is trapped and then panic occurs. At
+that time, kernel debugging information is displayed on console.
-NMI switch that most IA32 servers have fires unknown NMI up, for example.
-If a system hangs up, try pressing the NMI switch.
-
-==============================================================
-
-panic_on_unrecovered_nmi:
-
-The default Linux behaviour on an NMI of either memory or unknown is to continue
-operation. For many environments such as scientific computing it is preferable
-that the box is taken out and the error dealt with than an uncorrected
-parity/ECC error get propogated.
-
-A small number of systems do generate NMI's for bizarre random reasons such as
-power management so the default is off. That sysctl works like the existing
-panic controls already in that directory.
-
+NMI switch that most IA32 servers have fires unknown NMI up, for
+example. If a system hangs up, try pressing the NMI switch.
diff --git a/arch/ia64/kvm/Kconfig b/arch/ia64/kvm/Kconfig
index fa4d1e5..9806e55 100644
--- a/arch/ia64/kvm/Kconfig
+++ b/arch/ia64/kvm/Kconfig
@@ -49,6 +49,5 @@
extensions.
source drivers/vhost/Kconfig
-source drivers/virtio/Kconfig
endif # VIRTUALIZATION
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6cb60ad..177cdaf 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2493,20 +2493,4 @@
source "crypto/Kconfig"
-menuconfig VIRTUALIZATION
- bool "Virtualization"
- default n
- ---help---
- Say Y here to get to see options for using your Linux host to run other
- operating systems inside virtual machines (guests).
- This option alone does not add any kernel code.
-
- If you say N, all options in this submenu will be skipped and disabled.
-
-if VIRTUALIZATION
-
-source drivers/virtio/Kconfig
-
-endif # VIRTUALIZATION
-
source "lib/Kconfig"
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index b7baff7..105b691 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -99,6 +99,5 @@
If unsure, say N.
source drivers/vhost/Kconfig
-source drivers/virtio/Kconfig
endif # VIRTUALIZATION
diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig
index f66a1bd..a216341 100644
--- a/arch/s390/kvm/Kconfig
+++ b/arch/s390/kvm/Kconfig
@@ -37,6 +37,5 @@
# OK, it's a little counter-intuitive to do this, but it puts it neatly under
# the virtualization menu.
source drivers/vhost/Kconfig
-source drivers/virtio/Kconfig
endif # VIRTUALIZATION
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index bbdeb48..748ff19 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -897,20 +897,4 @@
source "crypto/Kconfig"
-menuconfig VIRTUALIZATION
- bool "Virtualization"
- default n
- ---help---
- Say Y here to get to see options for using your Linux host to run other
- operating systems inside virtual machines (guests).
- This option alone does not add any kernel code.
-
- If you say N, all options in this submenu will be skipped and disabled.
-
-if VIRTUALIZATION
-
-source drivers/virtio/Kconfig
-
-endif # VIRTUALIZATION
-
source "lib/Kconfig"
diff --git a/arch/tile/kvm/Kconfig b/arch/tile/kvm/Kconfig
index b88f9c0..669fcdb 100644
--- a/arch/tile/kvm/Kconfig
+++ b/arch/tile/kvm/Kconfig
@@ -33,6 +33,5 @@
If unsure, say N.
source drivers/vhost/Kconfig
-source drivers/virtio/Kconfig
endif # VIRTUALIZATION
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 15587ed..87b659d 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -8,7 +8,8 @@
obj-$(CONFIG_BINFMT_ELF) += elfcore.o
-subarch-obj-y = lib/rwsem.o lib/string_32.o
+subarch-obj-y = lib/string_32.o
+subarch-obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += lib/rwsem.o
subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem_32.o
subarch-obj-$(CONFIG_MODULES) += kernel/module.o
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5f60ea1..b212754 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -390,12 +390,21 @@
This option compiles in support for the CE4100 SOC for settop
boxes and media devices.
+config X86_INTEL_MID
+ bool "Intel MID platform support"
+ depends on X86_32
+ depends on X86_EXTENDED_PLATFORM
+ ---help---
+ Select to build a kernel capable of supporting Intel MID platform
+ systems which do not have the PCI legacy interfaces (Moorestown,
+ Medfield). If you are building for a PC class system say N here.
+
+if X86_INTEL_MID
+
config X86_MRST
bool "Moorestown MID platform"
depends on PCI
depends on PCI_GOANY
- depends on X86_32
- depends on X86_EXTENDED_PLATFORM
depends on X86_IO_APIC
select APB_TIMER
select I2C
@@ -410,6 +419,8 @@
nor standard legacy replacement devices/features. e.g. Moorestown does
not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
+endif
+
config X86_RDC321X
bool "RDC R-321x SoC"
depends on X86_32
@@ -623,6 +634,7 @@
config APB_TIMER
def_bool y if MRST
prompt "Langwell APB Timer Support" if X86_MRST
+ select DW_APB_TIMER
help
APB timer is the replacement for 8254, HPET on X86 MID platforms.
The APBT provides a stable time base on SMP
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 6a7cfdf..e3ca7e0 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -312,6 +312,9 @@
config CMPXCHG_LOCAL
def_bool X86_64 || (X86_32 && !M386)
+config CMPXCHG_DOUBLE
+ def_bool y
+
config X86_L1_CACHE_SHIFT
int
default "7" if MPENTIUM4 || MPSC
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index f7cb086..95365a8 100644
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -9,12 +9,6 @@
# Changed by many, many contributors over the years.
#
-# ROOT_DEV specifies the default root-device when making the image.
-# This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case
-# the default of FLOPPY is used by 'build'.
-
-ROOT_DEV := CURRENT
-
# If you want to preset the SVGA mode, uncomment the next line and
# set SVGA_MODE to whatever number you want.
# Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode.
@@ -75,8 +69,7 @@
$(obj)/bzImage: asflags-y := $(SVGA_MODE)
quiet_cmd_image = BUILD $@
-cmd_image = $(obj)/tools/build $(obj)/setup.bin $(obj)/vmlinux.bin \
- $(ROOT_DEV) > $@
+cmd_image = $(obj)/tools/build $(obj)/setup.bin $(obj)/vmlinux.bin > $@
$(obj)/bzImage: $(obj)/setup.bin $(obj)/vmlinux.bin $(obj)/tools/build FORCE
$(call if_changed,image)
diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c
index ee3a4ea..fdc60a0 100644
--- a/arch/x86/boot/tools/build.c
+++ b/arch/x86/boot/tools/build.c
@@ -130,7 +130,7 @@
static void usage(void)
{
- die("Usage: build setup system [rootdev] [> image]");
+ die("Usage: build setup system [> image]");
}
int main(int argc, char ** argv)
@@ -138,39 +138,14 @@
unsigned int i, sz, setup_sectors;
int c;
u32 sys_size;
- u8 major_root, minor_root;
struct stat sb;
FILE *file;
int fd;
void *kernel;
u32 crc = 0xffffffffUL;
- if ((argc < 3) || (argc > 4))
+ if (argc != 3)
usage();
- if (argc > 3) {
- if (!strcmp(argv[3], "CURRENT")) {
- if (stat("/", &sb)) {
- perror("/");
- die("Couldn't stat /");
- }
- major_root = major(sb.st_dev);
- minor_root = minor(sb.st_dev);
- } else if (strcmp(argv[3], "FLOPPY")) {
- if (stat(argv[3], &sb)) {
- perror(argv[3]);
- die("Couldn't stat root device.");
- }
- major_root = major(sb.st_rdev);
- minor_root = minor(sb.st_rdev);
- } else {
- major_root = 0;
- minor_root = 0;
- }
- } else {
- major_root = DEFAULT_MAJOR_ROOT;
- minor_root = DEFAULT_MINOR_ROOT;
- }
- fprintf(stderr, "Root device is (%d, %d)\n", major_root, minor_root);
/* Copy the setup code */
file = fopen(argv[1], "r");
@@ -193,8 +168,8 @@
memset(buf+c, 0, i-c);
/* Set the default root device */
- buf[508] = minor_root;
- buf[509] = major_root;
+ buf[508] = DEFAULT_MINOR_ROOT;
+ buf[509] = DEFAULT_MAJOR_ROOT;
fprintf(stderr, "Setup is %d bytes (padded to %d bytes).\n", c, i);
diff --git a/arch/x86/include/asm/apb_timer.h b/arch/x86/include/asm/apb_timer.h
index 082cf81..0acbac2 100644
--- a/arch/x86/include/asm/apb_timer.h
+++ b/arch/x86/include/asm/apb_timer.h
@@ -18,24 +18,6 @@
#ifdef CONFIG_APB_TIMER
-/* Langwell DW APB timer registers */
-#define APBTMR_N_LOAD_COUNT 0x00
-#define APBTMR_N_CURRENT_VALUE 0x04
-#define APBTMR_N_CONTROL 0x08
-#define APBTMR_N_EOI 0x0c
-#define APBTMR_N_INT_STATUS 0x10
-
-#define APBTMRS_INT_STATUS 0xa0
-#define APBTMRS_EOI 0xa4
-#define APBTMRS_RAW_INT_STATUS 0xa8
-#define APBTMRS_COMP_VERSION 0xac
-#define APBTMRS_REG_SIZE 0x14
-
-/* register bits */
-#define APBTMR_CONTROL_ENABLE (1<<0)
-#define APBTMR_CONTROL_MODE_PERIODIC (1<<1) /*1: periodic 0:free running */
-#define APBTMR_CONTROL_INT (1<<2)
-
/* default memory mapped register base */
#define LNW_SCU_ADDR 0xFF100000
#define LNW_EXT_TIMER_OFFSET 0x1B800
@@ -43,8 +25,8 @@
#define LNW_EXT_TIMER_PGOFFSET 0x800
/* APBT clock speed range from PCLK to fabric base, 25-100MHz */
-#define APBT_MAX_FREQ 50
-#define APBT_MIN_FREQ 1
+#define APBT_MAX_FREQ 50000000
+#define APBT_MIN_FREQ 1000000
#define APBT_MMAP_SIZE 1024
#define APBT_DEV_USED 1
diff --git a/arch/x86/include/asm/cmpxchg_32.h b/arch/x86/include/asm/cmpxchg_32.h
index 284a6e8..3deb725 100644
--- a/arch/x86/include/asm/cmpxchg_32.h
+++ b/arch/x86/include/asm/cmpxchg_32.h
@@ -280,4 +280,52 @@
#endif
+#define cmpxchg8b(ptr, o1, o2, n1, n2) \
+({ \
+ char __ret; \
+ __typeof__(o2) __dummy; \
+ __typeof__(*(ptr)) __old1 = (o1); \
+ __typeof__(o2) __old2 = (o2); \
+ __typeof__(*(ptr)) __new1 = (n1); \
+ __typeof__(o2) __new2 = (n2); \
+ asm volatile(LOCK_PREFIX "cmpxchg8b %2; setz %1" \
+ : "=d"(__dummy), "=a" (__ret), "+m" (*ptr)\
+ : "a" (__old1), "d"(__old2), \
+ "b" (__new1), "c" (__new2) \
+ : "memory"); \
+ __ret; })
+
+
+#define cmpxchg8b_local(ptr, o1, o2, n1, n2) \
+({ \
+ char __ret; \
+ __typeof__(o2) __dummy; \
+ __typeof__(*(ptr)) __old1 = (o1); \
+ __typeof__(o2) __old2 = (o2); \
+ __typeof__(*(ptr)) __new1 = (n1); \
+ __typeof__(o2) __new2 = (n2); \
+ asm volatile("cmpxchg8b %2; setz %1" \
+ : "=d"(__dummy), "=a"(__ret), "+m" (*ptr)\
+ : "a" (__old), "d"(__old2), \
+ "b" (__new1), "c" (__new2), \
+ : "memory"); \
+ __ret; })
+
+
+#define cmpxchg_double(ptr, o1, o2, n1, n2) \
+({ \
+ BUILD_BUG_ON(sizeof(*(ptr)) != 4); \
+ VM_BUG_ON((unsigned long)(ptr) % 8); \
+ cmpxchg8b((ptr), (o1), (o2), (n1), (n2)); \
+})
+
+#define cmpxchg_double_local(ptr, o1, o2, n1, n2) \
+({ \
+ BUILD_BUG_ON(sizeof(*(ptr)) != 4); \
+ VM_BUG_ON((unsigned long)(ptr) % 8); \
+ cmpxchg16b_local((ptr), (o1), (o2), (n1), (n2)); \
+})
+
+#define system_has_cmpxchg_double() cpu_has_cx8
+
#endif /* _ASM_X86_CMPXCHG_32_H */
diff --git a/arch/x86/include/asm/cmpxchg_64.h b/arch/x86/include/asm/cmpxchg_64.h
index 423ae58..7cf5c0a 100644
--- a/arch/x86/include/asm/cmpxchg_64.h
+++ b/arch/x86/include/asm/cmpxchg_64.h
@@ -151,4 +151,49 @@
cmpxchg_local((ptr), (o), (n)); \
})
+#define cmpxchg16b(ptr, o1, o2, n1, n2) \
+({ \
+ char __ret; \
+ __typeof__(o2) __junk; \
+ __typeof__(*(ptr)) __old1 = (o1); \
+ __typeof__(o2) __old2 = (o2); \
+ __typeof__(*(ptr)) __new1 = (n1); \
+ __typeof__(o2) __new2 = (n2); \
+ asm volatile(LOCK_PREFIX "cmpxchg16b %2;setz %1" \
+ : "=d"(__junk), "=a"(__ret), "+m" (*ptr) \
+ : "b"(__new1), "c"(__new2), \
+ "a"(__old1), "d"(__old2)); \
+ __ret; })
+
+
+#define cmpxchg16b_local(ptr, o1, o2, n1, n2) \
+({ \
+ char __ret; \
+ __typeof__(o2) __junk; \
+ __typeof__(*(ptr)) __old1 = (o1); \
+ __typeof__(o2) __old2 = (o2); \
+ __typeof__(*(ptr)) __new1 = (n1); \
+ __typeof__(o2) __new2 = (n2); \
+ asm volatile("cmpxchg16b %2;setz %1" \
+ : "=d"(__junk), "=a"(__ret), "+m" (*ptr) \
+ : "b"(__new1), "c"(__new2), \
+ "a"(__old1), "d"(__old2)); \
+ __ret; })
+
+#define cmpxchg_double(ptr, o1, o2, n1, n2) \
+({ \
+ BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
+ VM_BUG_ON((unsigned long)(ptr) % 16); \
+ cmpxchg16b((ptr), (o1), (o2), (n1), (n2)); \
+})
+
+#define cmpxchg_double_local(ptr, o1, o2, n1, n2) \
+({ \
+ BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
+ VM_BUG_ON((unsigned long)(ptr) % 16); \
+ cmpxchg16b_local((ptr), (o1), (o2), (n1), (n2)); \
+})
+
+#define system_has_cmpxchg_double() cpu_has_cx16
+
#endif /* _ASM_X86_CMPXCHG_64_H */
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 9929b35..4258aac 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -288,6 +288,8 @@
#define cpu_has_hypervisor boot_cpu_has(X86_FEATURE_HYPERVISOR)
#define cpu_has_pclmulqdq boot_cpu_has(X86_FEATURE_PCLMULQDQ)
#define cpu_has_perfctr_core boot_cpu_has(X86_FEATURE_PERFCTR_CORE)
+#define cpu_has_cx8 boot_cpu_has(X86_FEATURE_CX8)
+#define cpu_has_cx16 boot_cpu_has(X86_FEATURE_CX16)
#if defined(CONFIG_X86_INVLPG) || defined(CONFIG_X86_64)
# define cpu_has_invlpg 1
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
index 2b6630d..afdc3f75 100644
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -27,15 +27,12 @@
* timer, but by default APB timer has higher rating than local APIC timers.
*/
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
#include <linux/delay.h>
+#include <linux/dw_apb_timer.h>
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/sysdev.h>
#include <linux/slab.h>
#include <linux/pm.h>
-#include <linux/pci.h>
#include <linux/sfi.h>
#include <linux/interrupt.h>
#include <linux/cpu.h>
@@ -46,75 +43,46 @@
#include <asm/mrst.h>
#include <asm/time.h>
-#define APBT_MASK CLOCKSOURCE_MASK(32)
-#define APBT_SHIFT 22
#define APBT_CLOCKEVENT_RATING 110
#define APBT_CLOCKSOURCE_RATING 250
-#define APBT_MIN_DELTA_USEC 200
-#define EVT_TO_APBT_DEV(evt) container_of(evt, struct apbt_dev, evt)
#define APBT_CLOCKEVENT0_NUM (0)
-#define APBT_CLOCKEVENT1_NUM (1)
#define APBT_CLOCKSOURCE_NUM (2)
-static unsigned long apbt_address;
+static phys_addr_t apbt_address;
static int apb_timer_block_enabled;
static void __iomem *apbt_virt_address;
-static int phy_cs_timer_id;
/*
* Common DW APB timer info
*/
-static uint64_t apbt_freq;
-
-static void apbt_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt);
-static int apbt_next_event(unsigned long delta,
- struct clock_event_device *evt);
-static cycle_t apbt_read_clocksource(struct clocksource *cs);
-static void apbt_restart_clocksource(struct clocksource *cs);
+static unsigned long apbt_freq;
struct apbt_dev {
- struct clock_event_device evt;
- unsigned int num;
- int cpu;
- unsigned int irq;
- unsigned int tick;
- unsigned int count;
- unsigned int flags;
- char name[10];
+ struct dw_apb_clock_event_device *timer;
+ unsigned int num;
+ int cpu;
+ unsigned int irq;
+ char name[10];
};
+static struct dw_apb_clocksource *clocksource_apbt;
+
+static inline void __iomem *adev_virt_addr(struct apbt_dev *adev)
+{
+ return apbt_virt_address + adev->num * APBTMRS_REG_SIZE;
+}
+
static DEFINE_PER_CPU(struct apbt_dev, cpu_apbt_dev);
#ifdef CONFIG_SMP
static unsigned int apbt_num_timers_used;
-static struct apbt_dev *apbt_devs;
#endif
-static inline unsigned long apbt_readl_reg(unsigned long a)
-{
- return readl(apbt_virt_address + a);
-}
-
-static inline void apbt_writel_reg(unsigned long d, unsigned long a)
-{
- writel(d, apbt_virt_address + a);
-}
-
-static inline unsigned long apbt_readl(int n, unsigned long a)
-{
- return readl(apbt_virt_address + a + n * APBTMRS_REG_SIZE);
-}
-
-static inline void apbt_writel(int n, unsigned long d, unsigned long a)
-{
- writel(d, apbt_virt_address + a + n * APBTMRS_REG_SIZE);
-}
-
static inline void apbt_set_mapping(void)
{
struct sfi_timer_table_entry *mtmr;
+ int phy_cs_timer_id = 0;
if (apbt_virt_address) {
pr_debug("APBT base already mapped\n");
@@ -126,21 +94,18 @@
APBT_CLOCKEVENT0_NUM);
return;
}
- apbt_address = (unsigned long)mtmr->phys_addr;
+ apbt_address = (phys_addr_t)mtmr->phys_addr;
if (!apbt_address) {
printk(KERN_WARNING "No timer base from SFI, use default\n");
apbt_address = APBT_DEFAULT_BASE;
}
apbt_virt_address = ioremap_nocache(apbt_address, APBT_MMAP_SIZE);
- if (apbt_virt_address) {
- pr_debug("Mapped APBT physical addr %p at virtual addr %p\n",\
- (void *)apbt_address, (void *)apbt_virt_address);
- } else {
- pr_debug("Failed mapping APBT phy address at %p\n",\
- (void *)apbt_address);
+ if (!apbt_virt_address) {
+ pr_debug("Failed mapping APBT phy address at %lu\n",\
+ (unsigned long)apbt_address);
goto panic_noapbt;
}
- apbt_freq = mtmr->freq_hz / USEC_PER_SEC;
+ apbt_freq = mtmr->freq_hz;
sfi_free_mtmr(mtmr);
/* Now figure out the physical timer id for clocksource device */
@@ -149,9 +114,14 @@
goto panic_noapbt;
/* Now figure out the physical timer id */
- phy_cs_timer_id = (unsigned int)(mtmr->phys_addr & 0xff)
- / APBTMRS_REG_SIZE;
- pr_debug("Use timer %d for clocksource\n", phy_cs_timer_id);
+ pr_debug("Use timer %d for clocksource\n",
+ (int)(mtmr->phys_addr & 0xff) / APBTMRS_REG_SIZE);
+ phy_cs_timer_id = (unsigned int)(mtmr->phys_addr & 0xff) /
+ APBTMRS_REG_SIZE;
+
+ clocksource_apbt = dw_apb_clocksource_init(APBT_CLOCKSOURCE_RATING,
+ "apbt0", apbt_virt_address + phy_cs_timer_id *
+ APBTMRS_REG_SIZE, apbt_freq);
return;
panic_noapbt:
@@ -173,82 +143,6 @@
return apbt_virt_address ? 1 : 0;
}
-static struct clocksource clocksource_apbt = {
- .name = "apbt",
- .rating = APBT_CLOCKSOURCE_RATING,
- .read = apbt_read_clocksource,
- .mask = APBT_MASK,
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
- .resume = apbt_restart_clocksource,
-};
-
-/* boot APB clock event device */
-static struct clock_event_device apbt_clockevent = {
- .name = "apbt0",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = apbt_set_mode,
- .set_next_event = apbt_next_event,
- .shift = APBT_SHIFT,
- .irq = 0,
- .rating = APBT_CLOCKEVENT_RATING,
-};
-
-/*
- * start count down from 0xffff_ffff. this is done by toggling the enable bit
- * then load initial load count to ~0.
- */
-static void apbt_start_counter(int n)
-{
- unsigned long ctrl = apbt_readl(n, APBTMR_N_CONTROL);
-
- ctrl &= ~APBTMR_CONTROL_ENABLE;
- apbt_writel(n, ctrl, APBTMR_N_CONTROL);
- apbt_writel(n, ~0, APBTMR_N_LOAD_COUNT);
- /* enable, mask interrupt */
- ctrl &= ~APBTMR_CONTROL_MODE_PERIODIC;
- ctrl |= (APBTMR_CONTROL_ENABLE | APBTMR_CONTROL_INT);
- apbt_writel(n, ctrl, APBTMR_N_CONTROL);
- /* read it once to get cached counter value initialized */
- apbt_read_clocksource(&clocksource_apbt);
-}
-
-static irqreturn_t apbt_interrupt_handler(int irq, void *data)
-{
- struct apbt_dev *dev = (struct apbt_dev *)data;
- struct clock_event_device *aevt = &dev->evt;
-
- if (!aevt->event_handler) {
- printk(KERN_INFO "Spurious APBT timer interrupt on %d\n",
- dev->num);
- return IRQ_NONE;
- }
- aevt->event_handler(aevt);
- return IRQ_HANDLED;
-}
-
-static void apbt_restart_clocksource(struct clocksource *cs)
-{
- apbt_start_counter(phy_cs_timer_id);
-}
-
-static void apbt_enable_int(int n)
-{
- unsigned long ctrl = apbt_readl(n, APBTMR_N_CONTROL);
- /* clear pending intr */
- apbt_readl(n, APBTMR_N_EOI);
- ctrl &= ~APBTMR_CONTROL_INT;
- apbt_writel(n, ctrl, APBTMR_N_CONTROL);
-}
-
-static void apbt_disable_int(int n)
-{
- unsigned long ctrl = apbt_readl(n, APBTMR_N_CONTROL);
-
- ctrl |= APBTMR_CONTROL_INT;
- apbt_writel(n, ctrl, APBTMR_N_CONTROL);
-}
-
-
static int __init apbt_clockevent_register(void)
{
struct sfi_timer_table_entry *mtmr;
@@ -261,45 +155,21 @@
return -ENODEV;
}
- /*
- * We need to calculate the scaled math multiplication factor for
- * nanosecond to apbt tick conversion.
- * mult = (nsec/cycle)*2^APBT_SHIFT
- */
- apbt_clockevent.mult = div_sc((unsigned long) mtmr->freq_hz
- , NSEC_PER_SEC, APBT_SHIFT);
-
- /* Calculate the min / max delta */
- apbt_clockevent.max_delta_ns = clockevent_delta2ns(0x7FFFFFFF,
- &apbt_clockevent);
- apbt_clockevent.min_delta_ns = clockevent_delta2ns(
- APBT_MIN_DELTA_USEC*apbt_freq,
- &apbt_clockevent);
- /*
- * Start apbt with the boot cpu mask and make it
- * global if not used for per cpu timer.
- */
- apbt_clockevent.cpumask = cpumask_of(smp_processor_id());
adev->num = smp_processor_id();
- memcpy(&adev->evt, &apbt_clockevent, sizeof(struct clock_event_device));
+ adev->timer = dw_apb_clockevent_init(smp_processor_id(), "apbt0",
+ mrst_timer_options == MRST_TIMER_LAPIC_APBT ?
+ APBT_CLOCKEVENT_RATING - 100 : APBT_CLOCKEVENT_RATING,
+ adev_virt_addr(adev), 0, apbt_freq);
+ /* Firmware does EOI handling for us. */
+ adev->timer->eoi = NULL;
if (mrst_timer_options == MRST_TIMER_LAPIC_APBT) {
- adev->evt.rating = APBT_CLOCKEVENT_RATING - 100;
- global_clock_event = &adev->evt;
+ global_clock_event = &adev->timer->ced;
printk(KERN_DEBUG "%s clockevent registered as global\n",
global_clock_event->name);
}
- if (request_irq(apbt_clockevent.irq, apbt_interrupt_handler,
- IRQF_TIMER | IRQF_DISABLED | IRQF_NOBALANCING,
- apbt_clockevent.name, adev)) {
- printk(KERN_ERR "Failed request IRQ for APBT%d\n",
- apbt_clockevent.irq);
- }
-
- clockevents_register_device(&adev->evt);
- /* Start APBT 0 interrupts */
- apbt_enable_int(APBT_CLOCKEVENT0_NUM);
+ dw_apb_clockevent_register(adev->timer);
sfi_free_mtmr(mtmr);
return 0;
@@ -317,52 +187,34 @@
irq_set_affinity(adev->irq, cpumask_of(adev->cpu));
/* APB timer irqs are set up as mp_irqs, timer is edge type */
__irq_set_handler(adev->irq, handle_edge_irq, 0, "edge");
-
- if (system_state == SYSTEM_BOOTING) {
- if (request_irq(adev->irq, apbt_interrupt_handler,
- IRQF_TIMER | IRQF_DISABLED |
- IRQF_NOBALANCING,
- adev->name, adev)) {
- printk(KERN_ERR "Failed request IRQ for APBT%d\n",
- adev->num);
- }
- } else
- enable_irq(adev->irq);
}
/* Should be called with per cpu */
void apbt_setup_secondary_clock(void)
{
struct apbt_dev *adev;
- struct clock_event_device *aevt;
int cpu;
/* Don't register boot CPU clockevent */
cpu = smp_processor_id();
if (!cpu)
return;
- /*
- * We need to calculate the scaled math multiplication factor for
- * nanosecond to apbt tick conversion.
- * mult = (nsec/cycle)*2^APBT_SHIFT
- */
- printk(KERN_INFO "Init per CPU clockevent %d\n", cpu);
- adev = &per_cpu(cpu_apbt_dev, cpu);
- aevt = &adev->evt;
- memcpy(aevt, &apbt_clockevent, sizeof(*aevt));
- aevt->cpumask = cpumask_of(cpu);
- aevt->name = adev->name;
- aevt->mode = CLOCK_EVT_MODE_UNUSED;
+ adev = &__get_cpu_var(cpu_apbt_dev);
+ if (!adev->timer) {
+ adev->timer = dw_apb_clockevent_init(cpu, adev->name,
+ APBT_CLOCKEVENT_RATING, adev_virt_addr(adev),
+ adev->irq, apbt_freq);
+ adev->timer->eoi = NULL;
+ } else {
+ dw_apb_clockevent_resume(adev->timer);
+ }
- printk(KERN_INFO "Registering CPU %d clockevent device %s, mask %08x\n",
- cpu, aevt->name, *(u32 *)aevt->cpumask);
+ printk(KERN_INFO "Registering CPU %d clockevent device %s, cpu %08x\n",
+ cpu, adev->name, adev->cpu);
apbt_setup_irq(adev);
-
- clockevents_register_device(aevt);
-
- apbt_enable_int(cpu);
+ dw_apb_clockevent_register(adev->timer);
return;
}
@@ -385,13 +237,12 @@
switch (action & 0xf) {
case CPU_DEAD:
- disable_irq(adev->irq);
- apbt_disable_int(cpu);
+ dw_apb_clockevent_pause(adev->timer);
if (system_state == SYSTEM_RUNNING) {
pr_debug("skipping APBT CPU %lu offline\n", cpu);
} else if (adev) {
pr_debug("APBT clockevent for cpu %lu offline\n", cpu);
- free_irq(adev->irq, adev);
+ dw_apb_clockevent_stop(adev->timer);
}
break;
default:
@@ -416,116 +267,16 @@
#endif /* CONFIG_SMP */
-static void apbt_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- unsigned long ctrl;
- uint64_t delta;
- int timer_num;
- struct apbt_dev *adev = EVT_TO_APBT_DEV(evt);
-
- BUG_ON(!apbt_virt_address);
-
- timer_num = adev->num;
- pr_debug("%s CPU %d timer %d mode=%d\n",
- __func__, first_cpu(*evt->cpumask), timer_num, mode);
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- delta = ((uint64_t)(NSEC_PER_SEC/HZ)) * apbt_clockevent.mult;
- delta >>= apbt_clockevent.shift;
- ctrl = apbt_readl(timer_num, APBTMR_N_CONTROL);
- ctrl |= APBTMR_CONTROL_MODE_PERIODIC;
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
- /*
- * DW APB p. 46, have to disable timer before load counter,
- * may cause sync problem.
- */
- ctrl &= ~APBTMR_CONTROL_ENABLE;
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
- udelay(1);
- pr_debug("Setting clock period %d for HZ %d\n", (int)delta, HZ);
- apbt_writel(timer_num, delta, APBTMR_N_LOAD_COUNT);
- ctrl |= APBTMR_CONTROL_ENABLE;
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
- break;
- /* APB timer does not have one-shot mode, use free running mode */
- case CLOCK_EVT_MODE_ONESHOT:
- ctrl = apbt_readl(timer_num, APBTMR_N_CONTROL);
- /*
- * set free running mode, this mode will let timer reload max
- * timeout which will give time (3min on 25MHz clock) to rearm
- * the next event, therefore emulate the one-shot mode.
- */
- ctrl &= ~APBTMR_CONTROL_ENABLE;
- ctrl &= ~APBTMR_CONTROL_MODE_PERIODIC;
-
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
- /* write again to set free running mode */
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
-
- /*
- * DW APB p. 46, load counter with all 1s before starting free
- * running mode.
- */
- apbt_writel(timer_num, ~0, APBTMR_N_LOAD_COUNT);
- ctrl &= ~APBTMR_CONTROL_INT;
- ctrl |= APBTMR_CONTROL_ENABLE;
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
- break;
-
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- apbt_disable_int(timer_num);
- ctrl = apbt_readl(timer_num, APBTMR_N_CONTROL);
- ctrl &= ~APBTMR_CONTROL_ENABLE;
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
- break;
-
- case CLOCK_EVT_MODE_RESUME:
- apbt_enable_int(timer_num);
- break;
- }
-}
-
-static int apbt_next_event(unsigned long delta,
- struct clock_event_device *evt)
-{
- unsigned long ctrl;
- int timer_num;
-
- struct apbt_dev *adev = EVT_TO_APBT_DEV(evt);
-
- timer_num = adev->num;
- /* Disable timer */
- ctrl = apbt_readl(timer_num, APBTMR_N_CONTROL);
- ctrl &= ~APBTMR_CONTROL_ENABLE;
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
- /* write new count */
- apbt_writel(timer_num, delta, APBTMR_N_LOAD_COUNT);
- ctrl |= APBTMR_CONTROL_ENABLE;
- apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
- return 0;
-}
-
-static cycle_t apbt_read_clocksource(struct clocksource *cs)
-{
- unsigned long current_count;
-
- current_count = apbt_readl(phy_cs_timer_id, APBTMR_N_CURRENT_VALUE);
- return (cycle_t)~current_count;
-}
-
static int apbt_clocksource_register(void)
{
u64 start, now;
cycle_t t1;
/* Start the counter, use timer 2 as source, timer 0/1 for event */
- apbt_start_counter(phy_cs_timer_id);
+ dw_apb_clocksource_start(clocksource_apbt);
/* Verify whether apbt counter works */
- t1 = apbt_read_clocksource(&clocksource_apbt);
+ t1 = dw_apb_clocksource_read(clocksource_apbt);
rdtscll(start);
/*
@@ -540,10 +291,10 @@
} while ((now - start) < 200000UL);
/* APBT is the only always on clocksource, it has to work! */
- if (t1 == apbt_read_clocksource(&clocksource_apbt))
+ if (t1 == dw_apb_clocksource_read(clocksource_apbt))
panic("APBT counter not counting. APBT disabled\n");
- clocksource_register_khz(&clocksource_apbt, (u32)apbt_freq*1000);
+ dw_apb_clocksource_register(clocksource_apbt);
return 0;
}
@@ -567,10 +318,7 @@
if (apb_timer_block_enabled)
return;
apbt_set_mapping();
- if (apbt_virt_address) {
- pr_debug("Found APBT version 0x%lx\n",\
- apbt_readl_reg(APBTMRS_COMP_VERSION));
- } else
+ if (!apbt_virt_address)
goto out_noapbt;
/*
* Read the frequency and check for a sane value, for ESL model
@@ -578,7 +326,7 @@
*/
if (apbt_freq < APBT_MIN_FREQ || apbt_freq > APBT_MAX_FREQ) {
- pr_debug("APBT has invalid freq 0x%llx\n", apbt_freq);
+ pr_debug("APBT has invalid freq 0x%lx\n", apbt_freq);
goto out_noapbt;
}
if (apbt_clocksource_register()) {
@@ -604,30 +352,20 @@
} else {
percpu_timer = 0;
apbt_num_timers_used = 1;
- adev = &per_cpu(cpu_apbt_dev, 0);
- adev->flags &= ~APBT_DEV_USED;
}
pr_debug("%s: %d APB timers used\n", __func__, apbt_num_timers_used);
/* here we set up per CPU timer data structure */
- apbt_devs = kzalloc(sizeof(struct apbt_dev) * apbt_num_timers_used,
- GFP_KERNEL);
- if (!apbt_devs) {
- printk(KERN_ERR "Failed to allocate APB timer devices\n");
- return;
- }
for (i = 0; i < apbt_num_timers_used; i++) {
adev = &per_cpu(cpu_apbt_dev, i);
adev->num = i;
adev->cpu = i;
p_mtmr = sfi_get_mtmr(i);
- if (p_mtmr) {
- adev->tick = p_mtmr->freq_hz;
+ if (p_mtmr)
adev->irq = p_mtmr->irq;
- } else
+ else
printk(KERN_ERR "Failed to get timer for cpu %d\n", i);
- adev->count = 0;
- sprintf(adev->name, "apbt%d", i);
+ snprintf(adev->name, sizeof(adev->name) - 1, "apbt%d", i);
}
#endif
@@ -639,17 +377,8 @@
panic("failed to enable APB timer\n");
}
-static inline void apbt_disable(int n)
-{
- if (is_apbt_capable()) {
- unsigned long ctrl = apbt_readl(n, APBTMR_N_CONTROL);
- ctrl &= ~APBTMR_CONTROL_ENABLE;
- apbt_writel(n, ctrl, APBTMR_N_CONTROL);
- }
-}
-
/* called before apb_timer_enable, use early map */
-unsigned long apbt_quick_calibrate()
+unsigned long apbt_quick_calibrate(void)
{
int i, scale;
u64 old, new;
@@ -658,31 +387,31 @@
u32 loop, shift;
apbt_set_mapping();
- apbt_start_counter(phy_cs_timer_id);
+ dw_apb_clocksource_start(clocksource_apbt);
/* check if the timer can count down, otherwise return */
- old = apbt_read_clocksource(&clocksource_apbt);
+ old = dw_apb_clocksource_read(clocksource_apbt);
i = 10000;
while (--i) {
- if (old != apbt_read_clocksource(&clocksource_apbt))
+ if (old != dw_apb_clocksource_read(clocksource_apbt))
break;
}
if (!i)
goto failed;
/* count 16 ms */
- loop = (apbt_freq * 1000) << 4;
+ loop = (apbt_freq / 1000) << 4;
/* restart the timer to ensure it won't get to 0 in the calibration */
- apbt_start_counter(phy_cs_timer_id);
+ dw_apb_clocksource_start(clocksource_apbt);
- old = apbt_read_clocksource(&clocksource_apbt);
+ old = dw_apb_clocksource_read(clocksource_apbt);
old += loop;
t1 = __native_read_tsc();
do {
- new = apbt_read_clocksource(&clocksource_apbt);
+ new = dw_apb_clocksource_read(clocksource_apbt);
} while (new < old);
t2 = __native_read_tsc();
@@ -694,7 +423,7 @@
return 0;
}
scale = (int)div_u64((t2 - t1), loop >> shift);
- khz = (scale * apbt_freq * 1000) >> shift;
+ khz = (scale * (apbt_freq / 1000)) >> shift;
printk(KERN_INFO "TSC freq calculated by APB timer is %lu khz\n", khz);
return khz;
failed:
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 9498b84..b24be38 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1944,10 +1944,28 @@
void __cpuinit generic_processor_info(int apicid, int version)
{
- int cpu;
+ int cpu, max = nr_cpu_ids;
+ bool boot_cpu_detected = physid_isset(boot_cpu_physical_apicid,
+ phys_cpu_present_map);
+
+ /*
+ * If boot cpu has not been detected yet, then only allow upto
+ * nr_cpu_ids - 1 processors and keep one slot free for boot cpu
+ */
+ if (!boot_cpu_detected && num_processors >= nr_cpu_ids - 1 &&
+ apicid != boot_cpu_physical_apicid) {
+ int thiscpu = max + disabled_cpus - 1;
+
+ pr_warning(
+ "ACPI: NR_CPUS/possible_cpus limit of %i almost"
+ " reached. Keeping one slot for boot cpu."
+ " Processor %d/0x%x ignored.\n", max, thiscpu, apicid);
+
+ disabled_cpus++;
+ return;
+ }
if (num_processors >= nr_cpu_ids) {
- int max = nr_cpu_ids;
int thiscpu = max + disabled_cpus;
pr_warning(
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 525514c..46674fb 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -62,6 +62,8 @@
return;
}
+ kernel_fpu_begin();
+
/*
* trap_init() enabled FXSR and company _before_ testing for FP
* problems here.
@@ -80,6 +82,8 @@
: "=m" (*&fdiv_bug)
: "m" (*&x), "m" (*&y));
+ kernel_fpu_end();
+
boot_cpu_data.fdiv_bug = fdiv_bug;
if (boot_cpu_data.fdiv_bug)
printk(KERN_WARNING "Hmm, FPU with FDIV bug.\n");
diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c
index 8095f86..755f64f 100644
--- a/arch/x86/kernel/cpu/hypervisor.c
+++ b/arch/x86/kernel/cpu/hypervisor.c
@@ -32,11 +32,11 @@
*/
static const __initconst struct hypervisor_x86 * const hypervisors[] =
{
- &x86_hyper_vmware,
- &x86_hyper_ms_hyperv,
#ifdef CONFIG_XEN_PVHVM
&x86_hyper_xen_hvm,
#endif
+ &x86_hyper_vmware,
+ &x86_hyper_ms_hyperv,
};
const struct hypervisor_x86 *x86_hyper;
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index 8bbe8c5..b78643d 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -10,7 +10,7 @@
static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
{
- u8 config, rev;
+ u8 config;
u16 word;
/* BIOS may enable hardware IRQ balancing for
@@ -18,8 +18,7 @@
* based platforms.
* Disable SW irqbalance/affinity on those platforms.
*/
- pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
- if (rev > 0x9)
+ if (dev->revision > 0x9)
return;
/* enable access to config space*/
diff --git a/arch/x86/kernel/relocate_kernel_32.S b/arch/x86/kernel/relocate_kernel_32.S
index 4123553..36818f8 100644
--- a/arch/x86/kernel/relocate_kernel_32.S
+++ b/arch/x86/kernel/relocate_kernel_32.S
@@ -97,6 +97,8 @@
ret
identity_mapped:
+ /* set return address to 0 if not preserving context */
+ pushl $0
/* store the start address on the stack */
pushl %edx
diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S
index 4de8f5b..7a6f3b3 100644
--- a/arch/x86/kernel/relocate_kernel_64.S
+++ b/arch/x86/kernel/relocate_kernel_64.S
@@ -100,6 +100,8 @@
ret
identity_mapped:
+ /* set return address to 0 if not preserving context */
+ pushq $0
/* store the start address on the stack */
pushq %rdx
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 56c633a..db48336 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -5,7 +5,6 @@
#include <linux/timer.h>
#include <linux/acpi_pmtmr.h>
#include <linux/cpufreq.h>
-#include <linux/dmi.h>
#include <linux/delay.h>
#include <linux/clocksource.h>
#include <linux/percpu.h>
@@ -800,27 +799,6 @@
EXPORT_SYMBOL_GPL(mark_tsc_unstable);
-static int __init dmi_mark_tsc_unstable(const struct dmi_system_id *d)
-{
- printk(KERN_NOTICE "%s detected: marking TSC unstable.\n",
- d->ident);
- tsc_unstable = 1;
- return 0;
-}
-
-/* List of systems that have known TSC problems */
-static struct dmi_system_id __initdata bad_tsc_dmi_table[] = {
- {
- .callback = dmi_mark_tsc_unstable,
- .ident = "IBM Thinkpad 380XD",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
- DMI_MATCH(DMI_BOARD_NAME, "2635FA0"),
- },
- },
- {}
-};
-
static void __init check_system_tsc_reliable(void)
{
#ifdef CONFIG_MGEODE_LX
@@ -1010,8 +988,6 @@
lpj_fine = lpj;
use_tsc_delay();
- /* Check and install the TSC clocksource */
- dmi_check_system(bad_tsc_dmi_table);
if (unsynchronized_tsc())
mark_tsc_unstable("TSCs unsynchronized");
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 50f6364..65cf823 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -76,6 +76,5 @@
# the virtualization menu.
source drivers/vhost/Kconfig
source drivers/lguest/Kconfig
-source drivers/virtio/Kconfig
endif # VIRTUALIZATION
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 52e306d..9e7a4f5 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -112,6 +112,8 @@
source "drivers/vlynq/Kconfig"
+source "drivers/virtio/Kconfig"
+
source "drivers/xen/Kconfig"
source "drivers/staging/Kconfig"
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index d8d3e02..34e9c4f 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -12,3 +12,6 @@
config CLKSRC_MMIO
bool
+
+config DW_APB_TIMER
+ bool
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 7922a0c..85ad1646 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -8,3 +8,4 @@
obj-$(CONFIG_SH_TIMER_TMU) += sh_tmu.o
obj-$(CONFIG_CLKBLD_I8253) += i8253.o
obj-$(CONFIG_CLKSRC_MMIO) += mmio.o
+obj-$(CONFIG_DW_APB_TIMER) += dw_apb_timer.o
diff --git a/drivers/clocksource/dw_apb_timer.c b/drivers/clocksource/dw_apb_timer.c
new file mode 100644
index 0000000..580f870
--- /dev/null
+++ b/drivers/clocksource/dw_apb_timer.c
@@ -0,0 +1,401 @@
+/*
+ * (C) Copyright 2009 Intel Corporation
+ * Author: Jacob Pan (jacob.jun.pan@intel.com)
+ *
+ * Shared with ARM platforms, Jamie Iles, Picochip 2011
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Support for the Synopsys DesignWare APB Timers.
+ */
+#include <linux/dw_apb_timer.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+
+#define APBT_MIN_PERIOD 4
+#define APBT_MIN_DELTA_USEC 200
+
+#define APBTMR_N_LOAD_COUNT 0x00
+#define APBTMR_N_CURRENT_VALUE 0x04
+#define APBTMR_N_CONTROL 0x08
+#define APBTMR_N_EOI 0x0c
+#define APBTMR_N_INT_STATUS 0x10
+
+#define APBTMRS_INT_STATUS 0xa0
+#define APBTMRS_EOI 0xa4
+#define APBTMRS_RAW_INT_STATUS 0xa8
+#define APBTMRS_COMP_VERSION 0xac
+
+#define APBTMR_CONTROL_ENABLE (1 << 0)
+/* 1: periodic, 0:free running. */
+#define APBTMR_CONTROL_MODE_PERIODIC (1 << 1)
+#define APBTMR_CONTROL_INT (1 << 2)
+
+static inline struct dw_apb_clock_event_device *
+ced_to_dw_apb_ced(struct clock_event_device *evt)
+{
+ return container_of(evt, struct dw_apb_clock_event_device, ced);
+}
+
+static inline struct dw_apb_clocksource *
+clocksource_to_dw_apb_clocksource(struct clocksource *cs)
+{
+ return container_of(cs, struct dw_apb_clocksource, cs);
+}
+
+static unsigned long apbt_readl(struct dw_apb_timer *timer, unsigned long offs)
+{
+ return readl(timer->base + offs);
+}
+
+static void apbt_writel(struct dw_apb_timer *timer, unsigned long val,
+ unsigned long offs)
+{
+ writel(val, timer->base + offs);
+}
+
+static void apbt_disable_int(struct dw_apb_timer *timer)
+{
+ unsigned long ctrl = apbt_readl(timer, APBTMR_N_CONTROL);
+
+ ctrl |= APBTMR_CONTROL_INT;
+ apbt_writel(timer, ctrl, APBTMR_N_CONTROL);
+}
+
+/**
+ * dw_apb_clockevent_pause() - stop the clock_event_device from running
+ *
+ * @dw_ced: The APB clock to stop generating events.
+ */
+void dw_apb_clockevent_pause(struct dw_apb_clock_event_device *dw_ced)
+{
+ disable_irq(dw_ced->timer.irq);
+ apbt_disable_int(&dw_ced->timer);
+}
+
+static void apbt_eoi(struct dw_apb_timer *timer)
+{
+ apbt_readl(timer, APBTMR_N_EOI);
+}
+
+static irqreturn_t dw_apb_clockevent_irq(int irq, void *data)
+{
+ struct clock_event_device *evt = data;
+ struct dw_apb_clock_event_device *dw_ced = ced_to_dw_apb_ced(evt);
+
+ if (!evt->event_handler) {
+ pr_info("Spurious APBT timer interrupt %d", irq);
+ return IRQ_NONE;
+ }
+
+ if (dw_ced->eoi)
+ dw_ced->eoi(&dw_ced->timer);
+
+ evt->event_handler(evt);
+ return IRQ_HANDLED;
+}
+
+static void apbt_enable_int(struct dw_apb_timer *timer)
+{
+ unsigned long ctrl = apbt_readl(timer, APBTMR_N_CONTROL);
+ /* clear pending intr */
+ apbt_readl(timer, APBTMR_N_EOI);
+ ctrl &= ~APBTMR_CONTROL_INT;
+ apbt_writel(timer, ctrl, APBTMR_N_CONTROL);
+}
+
+static void apbt_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ unsigned long ctrl;
+ unsigned long period;
+ struct dw_apb_clock_event_device *dw_ced = ced_to_dw_apb_ced(evt);
+
+ pr_debug("%s CPU %d mode=%d\n", __func__, first_cpu(*evt->cpumask),
+ mode);
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ period = DIV_ROUND_UP(dw_ced->timer.freq, HZ);
+ ctrl = apbt_readl(&dw_ced->timer, APBTMR_N_CONTROL);
+ ctrl |= APBTMR_CONTROL_MODE_PERIODIC;
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+ /*
+ * DW APB p. 46, have to disable timer before load counter,
+ * may cause sync problem.
+ */
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+ udelay(1);
+ pr_debug("Setting clock period %lu for HZ %d\n", period, HZ);
+ apbt_writel(&dw_ced->timer, period, APBTMR_N_LOAD_COUNT);
+ ctrl |= APBTMR_CONTROL_ENABLE;
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+ break;
+
+ case CLOCK_EVT_MODE_ONESHOT:
+ ctrl = apbt_readl(&dw_ced->timer, APBTMR_N_CONTROL);
+ /*
+ * set free running mode, this mode will let timer reload max
+ * timeout which will give time (3min on 25MHz clock) to rearm
+ * the next event, therefore emulate the one-shot mode.
+ */
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ ctrl &= ~APBTMR_CONTROL_MODE_PERIODIC;
+
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+ /* write again to set free running mode */
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+
+ /*
+ * DW APB p. 46, load counter with all 1s before starting free
+ * running mode.
+ */
+ apbt_writel(&dw_ced->timer, ~0, APBTMR_N_LOAD_COUNT);
+ ctrl &= ~APBTMR_CONTROL_INT;
+ ctrl |= APBTMR_CONTROL_ENABLE;
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+ break;
+
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ ctrl = apbt_readl(&dw_ced->timer, APBTMR_N_CONTROL);
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+ break;
+
+ case CLOCK_EVT_MODE_RESUME:
+ apbt_enable_int(&dw_ced->timer);
+ break;
+ }
+}
+
+static int apbt_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ unsigned long ctrl;
+ struct dw_apb_clock_event_device *dw_ced = ced_to_dw_apb_ced(evt);
+
+ /* Disable timer */
+ ctrl = apbt_readl(&dw_ced->timer, APBTMR_N_CONTROL);
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+ /* write new count */
+ apbt_writel(&dw_ced->timer, delta, APBTMR_N_LOAD_COUNT);
+ ctrl |= APBTMR_CONTROL_ENABLE;
+ apbt_writel(&dw_ced->timer, ctrl, APBTMR_N_CONTROL);
+
+ return 0;
+}
+
+/**
+ * dw_apb_clockevent_init() - use an APB timer as a clock_event_device
+ *
+ * @cpu: The CPU the events will be targeted at.
+ * @name: The name used for the timer and the IRQ for it.
+ * @rating: The rating to give the timer.
+ * @base: I/O base for the timer registers.
+ * @irq: The interrupt number to use for the timer.
+ * @freq: The frequency that the timer counts at.
+ *
+ * This creates a clock_event_device for using with the generic clock layer
+ * but does not start and register it. This should be done with
+ * dw_apb_clockevent_register() as the next step. If this is the first time
+ * it has been called for a timer then the IRQ will be requested, if not it
+ * just be enabled to allow CPU hotplug to avoid repeatedly requesting and
+ * releasing the IRQ.
+ */
+struct dw_apb_clock_event_device *
+dw_apb_clockevent_init(int cpu, const char *name, unsigned rating,
+ void __iomem *base, int irq, unsigned long freq)
+{
+ struct dw_apb_clock_event_device *dw_ced =
+ kzalloc(sizeof(*dw_ced), GFP_KERNEL);
+ int err;
+
+ if (!dw_ced)
+ return NULL;
+
+ dw_ced->timer.base = base;
+ dw_ced->timer.irq = irq;
+ dw_ced->timer.freq = freq;
+
+ clockevents_calc_mult_shift(&dw_ced->ced, freq, APBT_MIN_PERIOD);
+ dw_ced->ced.max_delta_ns = clockevent_delta2ns(0x7fffffff,
+ &dw_ced->ced);
+ dw_ced->ced.min_delta_ns = clockevent_delta2ns(5000, &dw_ced->ced);
+ dw_ced->ced.cpumask = cpumask_of(cpu);
+ dw_ced->ced.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
+ dw_ced->ced.set_mode = apbt_set_mode;
+ dw_ced->ced.set_next_event = apbt_next_event;
+ dw_ced->ced.irq = dw_ced->timer.irq;
+ dw_ced->ced.rating = rating;
+ dw_ced->ced.name = name;
+
+ dw_ced->irqaction.name = dw_ced->ced.name;
+ dw_ced->irqaction.handler = dw_apb_clockevent_irq;
+ dw_ced->irqaction.dev_id = &dw_ced->ced;
+ dw_ced->irqaction.irq = irq;
+ dw_ced->irqaction.flags = IRQF_TIMER | IRQF_IRQPOLL |
+ IRQF_NOBALANCING |
+ IRQF_DISABLED;
+
+ dw_ced->eoi = apbt_eoi;
+ err = setup_irq(irq, &dw_ced->irqaction);
+ if (err) {
+ pr_err("failed to request timer irq\n");
+ kfree(dw_ced);
+ dw_ced = NULL;
+ }
+
+ return dw_ced;
+}
+
+/**
+ * dw_apb_clockevent_resume() - resume a clock that has been paused.
+ *
+ * @dw_ced: The APB clock to resume.
+ */
+void dw_apb_clockevent_resume(struct dw_apb_clock_event_device *dw_ced)
+{
+ enable_irq(dw_ced->timer.irq);
+}
+
+/**
+ * dw_apb_clockevent_stop() - stop the clock_event_device and release the IRQ.
+ *
+ * @dw_ced: The APB clock to stop generating the events.
+ */
+void dw_apb_clockevent_stop(struct dw_apb_clock_event_device *dw_ced)
+{
+ free_irq(dw_ced->timer.irq, &dw_ced->ced);
+}
+
+/**
+ * dw_apb_clockevent_register() - register the clock with the generic layer
+ *
+ * @dw_ced: The APB clock to register as a clock_event_device.
+ */
+void dw_apb_clockevent_register(struct dw_apb_clock_event_device *dw_ced)
+{
+ apbt_writel(&dw_ced->timer, 0, APBTMR_N_CONTROL);
+ clockevents_register_device(&dw_ced->ced);
+ apbt_enable_int(&dw_ced->timer);
+}
+
+/**
+ * dw_apb_clocksource_start() - start the clocksource counting.
+ *
+ * @dw_cs: The clocksource to start.
+ *
+ * This is used to start the clocksource before registration and can be used
+ * to enable calibration of timers.
+ */
+void dw_apb_clocksource_start(struct dw_apb_clocksource *dw_cs)
+{
+ /*
+ * start count down from 0xffff_ffff. this is done by toggling the
+ * enable bit then load initial load count to ~0.
+ */
+ unsigned long ctrl = apbt_readl(&dw_cs->timer, APBTMR_N_CONTROL);
+
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(&dw_cs->timer, ctrl, APBTMR_N_CONTROL);
+ apbt_writel(&dw_cs->timer, ~0, APBTMR_N_LOAD_COUNT);
+ /* enable, mask interrupt */
+ ctrl &= ~APBTMR_CONTROL_MODE_PERIODIC;
+ ctrl |= (APBTMR_CONTROL_ENABLE | APBTMR_CONTROL_INT);
+ apbt_writel(&dw_cs->timer, ctrl, APBTMR_N_CONTROL);
+ /* read it once to get cached counter value initialized */
+ dw_apb_clocksource_read(dw_cs);
+}
+
+static cycle_t __apbt_read_clocksource(struct clocksource *cs)
+{
+ unsigned long current_count;
+ struct dw_apb_clocksource *dw_cs =
+ clocksource_to_dw_apb_clocksource(cs);
+
+ current_count = apbt_readl(&dw_cs->timer, APBTMR_N_CURRENT_VALUE);
+
+ return (cycle_t)~current_count;
+}
+
+static void apbt_restart_clocksource(struct clocksource *cs)
+{
+ struct dw_apb_clocksource *dw_cs =
+ clocksource_to_dw_apb_clocksource(cs);
+
+ dw_apb_clocksource_start(dw_cs);
+}
+
+/**
+ * dw_apb_clocksource_init() - use an APB timer as a clocksource.
+ *
+ * @rating: The rating to give the clocksource.
+ * @name: The name for the clocksource.
+ * @base: The I/O base for the timer registers.
+ * @freq: The frequency that the timer counts at.
+ *
+ * This creates a clocksource using an APB timer but does not yet register it
+ * with the clocksource system. This should be done with
+ * dw_apb_clocksource_register() as the next step.
+ */
+struct dw_apb_clocksource *
+dw_apb_clocksource_init(unsigned rating, char *name, void __iomem *base,
+ unsigned long freq)
+{
+ struct dw_apb_clocksource *dw_cs = kzalloc(sizeof(*dw_cs), GFP_KERNEL);
+
+ if (!dw_cs)
+ return NULL;
+
+ dw_cs->timer.base = base;
+ dw_cs->timer.freq = freq;
+ dw_cs->cs.name = name;
+ dw_cs->cs.rating = rating;
+ dw_cs->cs.read = __apbt_read_clocksource;
+ dw_cs->cs.mask = CLOCKSOURCE_MASK(32);
+ dw_cs->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
+ dw_cs->cs.resume = apbt_restart_clocksource;
+
+ return dw_cs;
+}
+
+/**
+ * dw_apb_clocksource_register() - register the APB clocksource.
+ *
+ * @dw_cs: The clocksource to register.
+ */
+void dw_apb_clocksource_register(struct dw_apb_clocksource *dw_cs)
+{
+ clocksource_register_hz(&dw_cs->cs, dw_cs->timer.freq);
+}
+
+/**
+ * dw_apb_clocksource_read() - read the current value of a clocksource.
+ *
+ * @dw_cs: The clocksource to read.
+ */
+cycle_t dw_apb_clocksource_read(struct dw_apb_clocksource *dw_cs)
+{
+ return (cycle_t)~apbt_readl(&dw_cs->timer, APBTMR_N_CURRENT_VALUE);
+}
+
+/**
+ * dw_apb_clocksource_unregister() - unregister and free a clocksource.
+ *
+ * @dw_cs: The clocksource to unregister/free.
+ */
+void dw_apb_clocksource_unregister(struct dw_apb_clocksource *dw_cs)
+{
+ clocksource_unregister(&dw_cs->cs);
+
+ kfree(dw_cs);
+}
diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index 3dd6294..57e493b 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -7,6 +7,8 @@
tristate
depends on VIRTIO
+menu "Virtio drivers"
+
config VIRTIO_PCI
tristate "PCI driver for virtio devices (EXPERIMENTAL)"
depends on PCI && EXPERIMENTAL
@@ -33,3 +35,4 @@
If unsure, say M.
+endmenu
diff --git a/include/linux/dw_apb_timer.h b/include/linux/dw_apb_timer.h
new file mode 100644
index 0000000..49638ea
--- /dev/null
+++ b/include/linux/dw_apb_timer.h
@@ -0,0 +1,56 @@
+/*
+ * (C) Copyright 2009 Intel Corporation
+ * Author: Jacob Pan (jacob.jun.pan@intel.com)
+ *
+ * Shared with ARM platforms, Jamie Iles, Picochip 2011
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Support for the Synopsys DesignWare APB Timers.
+ */
+#ifndef __DW_APB_TIMER_H__
+#define __DW_APB_TIMER_H__
+
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/interrupt.h>
+
+#define APBTMRS_REG_SIZE 0x14
+
+struct dw_apb_timer {
+ void __iomem *base;
+ unsigned long freq;
+ int irq;
+};
+
+struct dw_apb_clock_event_device {
+ struct clock_event_device ced;
+ struct dw_apb_timer timer;
+ struct irqaction irqaction;
+ void (*eoi)(struct dw_apb_timer *);
+};
+
+struct dw_apb_clocksource {
+ struct dw_apb_timer timer;
+ struct clocksource cs;
+};
+
+void dw_apb_clockevent_register(struct dw_apb_clock_event_device *dw_ced);
+void dw_apb_clockevent_pause(struct dw_apb_clock_event_device *dw_ced);
+void dw_apb_clockevent_resume(struct dw_apb_clock_event_device *dw_ced);
+void dw_apb_clockevent_stop(struct dw_apb_clock_event_device *dw_ced);
+
+struct dw_apb_clock_event_device *
+dw_apb_clockevent_init(int cpu, const char *name, unsigned rating,
+ void __iomem *base, int irq, unsigned long freq);
+struct dw_apb_clocksource *
+dw_apb_clocksource_init(unsigned rating, char *name, void __iomem *base,
+ unsigned long freq);
+void dw_apb_clocksource_register(struct dw_apb_clocksource *dw_cs);
+void dw_apb_clocksource_start(struct dw_apb_clocksource *dw_cs);
+cycle_t dw_apb_clocksource_read(struct dw_apb_clocksource *dw_cs);
+void dw_apb_clocksource_unregister(struct dw_apb_clocksource *dw_cs);
+
+#endif /* __DW_APB_TIMER_H__ */
diff --git a/include/linux/irq.h b/include/linux/irq.h
index baa397e..5f69504 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -96,11 +96,6 @@
#define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
-static inline __deprecated bool CHECK_IRQ_PER_CPU(unsigned int status)
-{
- return status & IRQ_PER_CPU;
-}
-
/*
* Return value for chip->irq_set_affinity()
*
diff --git a/init/Kconfig b/init/Kconfig
index 27b8a7a..e20aa31 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -917,6 +917,8 @@
menuconfig EXPERT
bool "Configure standard kernel features (expert users)"
+ # Unhide debug options, to make the on-by-default options visible
+ select DEBUG_KERNEL
help
This option allows certain base kernel options and settings
to be disabled or tweaked. This is for specialized
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index d0861bb..56d62d3 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -52,7 +52,10 @@
endif
ifeq ($(ARCH),x86_64)
ARCH := x86
- IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1)
+ IS_X86_64 := 0
+ ifeq (, $(findstring m32,$(EXTRA_CFLAGS)))
+ IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1)
+ endif
ifeq (${IS_X86_64}, 1)
RAW_ARCH := x86_64
ARCH_CFLAGS := -DARCH_X86_64