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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Non-critical bug fixes
Simple bug fixes that were not considered important enough for inclusion
into 3.2.
* tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
MAINTAINERS: update pxa and mmp
ARM: pxa: Include linux/export.h in balloon3.c
ARM: OMAP4: clock: Add CPU local timer clock node
ARM: OMAP4: hwmod: Don't wait for the idle status if modulemode is not supported
ARM: OMAP: AM3517/3505: fix crash on boot due to incorrect voltagedomain data
ARM: OMAP: hwmod data: fix the panic on Nokia RM-680 during boot
ARM: OMAP2+: DMA: Workaround for invalid destination position
ARM: OMAP2+: DMA: Workaround for invalid source position
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* pxa/fixes-non-critical:
MAINTAINERS: update pxa and mmp
ARM: pxa: Include linux/export.h in balloon3.c
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Include linux/export.h to fix below build warning:
CC arch/arm/mach-pxa/balloon3.o
arch/arm/mach-pxa/balloon3.c:85: warning: data definition has no type or storage class
arch/arm/mach-pxa/balloon3.c:85: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL'
arch/arm/mach-pxa/balloon3.c:85: warning: parameter names (without types) in function declaration
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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* omap/fixes-non-critical-part2:
ARM: OMAP4: clock: Add CPU local timer clock node
ARM: OMAP4: hwmod: Don't wait for the idle status if modulemode is not supported
ARM: OMAP: AM3517/3505: fix crash on boot due to incorrect voltagedomain data
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Local timer clock is sourced from the CPU clock and hence changes
along with CPU clock. These per CPU local timers are used as
clock-events, so they need to be reconfigured on CPU frequency
change as part of CPUfreq governor.
Newly introduced clockevents_reconfigure() needs to know the
twd clock-rate. Provide a clock-node to make clk_get_rate() work
for TWD.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@ti.com>
[paul@pwsan.com: renamed clock node to 'mpu_periphclk' to indicate that this
is the Cortex-A9 MPCore subsystem clock PERIPHCLK (DDI 0407G); moved
clock and clkdev entries to match the autogenerated script output]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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If the module does not have any modulemode, the _disable_module function
will do nothing. There is then no point waiting for a idle status change.
It will remove the following warnings.
[ 0.331848] omap_hwmod: dmm: _wait_target_disable failed
[ 0.339935] omap_hwmod: emif_fw: _wait_target_disable failed
[ 0.348358] omap_hwmod: l3_main_1: _wait_target_disable failed
[ 0.356964] omap_hwmod: l3_main_2: _wait_target_disable failed
[ 0.365600] omap_hwmod: l4_abe: _wait_target_disable failed
[ 0.373931] omap_hwmod: l4_cfg: _wait_target_disable failed
[ 0.382263] omap_hwmod: l4_per: _wait_target_disable failed
[ 0.391113] omap_hwmod: l4_wkup: _wait_target_disable failed
[ 0.399536] omap_hwmod: dma_system: _wait_target_disable failed
[ 0.408325] omap_hwmod: dss_core: _wait_target_disable failed
[ 0.416839] omap_hwmod: dss_dispc: _wait_target_disable failed
[ 0.425445] omap_hwmod: dss_dsi1: _wait_target_disable failed
[ 0.433990] omap_hwmod: dss_dsi2: _wait_target_disable failed
[ 0.442504] omap_hwmod: dss_hdmi: _wait_target_disable failed
[ 0.451019] omap_hwmod: dss_rfbi: _wait_target_disable failed
[ 0.459564] omap_hwmod: dss_venc: _wait_target_disable failed
[ 0.489471] omap_hwmod: mailbox: _wait_target_disable failed
[ 0.505920] omap_hwmod: spinlock: _wait_target_disable failed
Note: For such module, the state is managed automatically by HW according
to clock domain transition. It is then not possible to wait for idle even
later in the _idle function since the status will change at clock domain
boundary.
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: renamed fns to indicate that they are OMAP4-only; moved
_wait_target_disable() into _disable_module(), removing duplicate code]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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AM3517/3505 chips don't have voltage controller and voltage processor
IP blocks. Trying to use OMAP34xx/36xx voltage domain data on these
chips causes a crash during boot:
omap_vc_init_channel: PMIC info requried to configure vc forvdd_core not populated.Hence cannot initialize vc
Unable to handle kernel NULL pointer dereference at virtual address 00000025
pgd = c0004000
[00000025] *pgd=00000000
Internal error: Oops: 5 [#1] SMP
Modules linked in:
CPU: 0 Tainted: G W (3.2.0-rc5-00006-g402ecf4 #304)
PC is at omap_vp_init+0x5c/0x14c
LR is at omap_vp_init+0x54/0x14c
Fix this by using very minimal voltage domain definitions for AM3517/3505.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Kevin Hilman <khilman@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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* omap/fixes-hwmod: (359 commits)
ARM: OMAP: hwmod data: fix the panic on Nokia RM-680 during boot
ARM: OMAP: hwmod data: fix iva and mailbox hwmods for OMAP 3
ARM: OMAP: rx51: fix USB
ARM: OMAP: mcbsp: Fix possible memory corruption
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fixes-hwmod
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Booting the Linux kernel on Nokia RM-680 board has been broken since
2.6.39 due to the following:
[ 0.217193] omap_hwmod: timer12: enabling
[ 0.221435] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa304010
[ 0.229431] Internal error: : 1028 [#1] SMP
[ 0.233825] Modules linked in:
[ 0.237060] CPU: 0 Not tainted (3.2.0-rc4-dirty #46)
[ 0.242645] PC is at _update_sysc_cache+0x2c/0x7c
[ 0.247589] LR is at _enable+0x1b0/0x2d8
[ 0.251708] pc : [<c0026108>] lr : [<c0026df4>] psr: 40000013
[ 0.251708] sp : ef831f40 ip : ef82f380 fp : c06ac0c0
[ 0.263702] r10: 00000000 r9 : c05dfb2c r8 : ef830000
[ 0.269165] r7 : c0027494 r6 : 00000000 r5 : 00000000 r4 : c06608b0
[ 0.276000] r3 : fa304000 r2 : 00000010 r1 : c0661e28 r0 : c06608b0
[ 0.282806] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 0.290405] Control: 10c5387d Table: 80004019 DAC: 00000017
[ 0.296417] Process swapper (pid: 1, stack limit = 0xef8302f8)
[ 0.302520] Stack: (0xef831f40 to 0xef832000)
[ 0.307098] 1f40: c06608b0 c0026df4 c06ad094 c0035120 00000001 c06608b0 00000000 c0027530
[ 0.315612] 1f60: c0027604 ef830000 c05dfb2c c06608b0 c0642ac0 c0025bf0 c0621234 c062120c
[ 0.324127] 1f80: c0621738 00000013 ef830000 c05dfb6c c0621234 c0008688 c062c880 c009eadc
[ 0.332641] 1fa0: 0000005f 00000000 c0621738 35390013 00000000 00000000 00000000 0000019a
[ 0.341156] 1fc0: c0681cf4 c0621234 c062120c c0621738 00000013 00000000 00000000 00000000
[ 0.349670] 1fe0: 00000000 c05d5298 00000000 c05d5200 c0014fa8 c0014fa8 ffff0000 ffff0000
[ 0.358184] [<c0026108>] (_update_sysc_cache+0x2c/0x7c) from [<c0026df4>] (_enable+0x1b0/0x2d8)
[ 0.367248] [<c0026df4>] (_enable+0x1b0/0x2d8) from [<c0027530>] (_setup+0x9c/0x170)
[ 0.375335] [<c0027530>] (_setup+0x9c/0x170) from [<c0025bf0>] (omap_hwmod_for_each+0x38/0x58)
[ 0.384307] [<c0025bf0>] (omap_hwmod_for_each+0x38/0x58) from [<c05dfb6c>] (omap_hwmod_setup_all+0x40/0xa0)
[ 0.394409] [<c05dfb6c>] (omap_hwmod_setup_all+0x40/0xa0) from [<c0008688>] (do_one_initcall+0x34/0x180)
[ 0.404296] [<c0008688>] (do_one_initcall+0x34/0x180) from [<c05d5298>] (kernel_init+0x98/0x144)
[ 0.413452] [<c05d5298>] (kernel_init+0x98/0x144) from [<c0014fa8>] (kernel_thread_exit+0x0/0x8)
[ 0.422576] Code: e3130c01 1590304c 0590304c 119320b2 (07932002)
[ 0.429046] ---[ end trace 1b75b31a2719ed1c ]---
[ 0.433959] Kernel panic - not syncing: Attempted to kill init!
Timer 12 is not necessarily available on non-GP devices (see e.g.
http://marc.info/?l=linux-omap&m=129433066521102&w=2), so it should be
registered only on GP OMAPs. With this change it's again possible to
boot RM-680 into the shell. Tested with 3.2-rc4.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
[paul@pwsan.com: changed subject line]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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If the DMA destination position has been asked before the
first actual data transfer has been done, the CDAC
register still contains 0 (it is initialized to 0 at
omsp_dma_start).
If CDAC == 0, return the programmed start address.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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If the DMA source position has been asked before the
first actual data transfer has been done, the CSAC
register does not contain valid information.
We can identify this situation by checking the CDAC
register:
CDAC != 0 indicates that the DMA transfer on the channel has
been started already.
When CDAC == 0 we can not trust the CSAC value since it has
not been updated, and can contain random number.
Return the start address in case the DMA has not jet started.
Note: The CDAC register has been initialized to 0 at dma_start
time.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: Remove irqsafe_cpu_xxx variants
Fix up conflict in arch/x86/include/asm/percpu.h due to clash with
cebef5beed3d ("x86: Fix and improve percpu_cmpxchg{8,16}b_double()")
which edited the (now removed) irqsafe_cpu_cmpxchg*_double code.
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We simply say that regular this_cpu use must be safe regardless of
preemption and interrupt state. That has no material change for x86
and s390 implementations of this_cpu operations. However, arches that
do not provide their own implementation for this_cpu operations will
now get code generated that disables interrupts instead of preemption.
-tj: This is part of on-going percpu API cleanup. For detailed
discussion of the subject, please refer to the following thread.
http://thread.gmane.org/gmane.linux.kernel/1222078
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
LKML-Reference: <alpine.DEB.2.00.1112221154380.11787@router.home>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (232 commits)
USB: Add USB-ID for Multiplex RC serial adapter to cp210x.c
xhci: Clean up 32-bit build warnings.
USB: update documentation for usbmon
usb: usb-storage doesn't support dynamic id currently, the patch disables the feature to fix an oops
drivers/usb/class/cdc-acm.c: clear dangling pointer
drivers/usb/dwc3/dwc3-pci.c: introduce missing kfree
drivers/usb/host/isp1760-if.c: introduce missing kfree
usb: option: add ZD Incorporated HSPA modem
usb: ch9: fix up MaxStreams helper
USB: usb-skeleton.c: cleanup open_count
USB: usb-skeleton.c: fix open/disconnect race
xhci: Properly handle COMP_2ND_BW_ERR
USB: remove dead code from suspend/resume path
USB: add quirk for another camera
drivers: usb: wusbcore: Fix dependency for USB_WUSB
xhci: Better debugging for critical host errors.
xhci: Be less verbose during URB cancellation.
xhci: Remove debugging about ring structure allocation.
xhci: Remove debugging about toggling cycle bits.
xhci: Remove debugging for individual transfers.
...
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git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
* 'for-gadget/next' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb: (24 commits)
usb: dwc3: gadget: add support for SG lists
usb: dwc3: gadget: don't force 'LST' always
usb: dwc3: gadget: don't return anything on prepare trbs
usb: dwc3: gadget: re-factor dwc3_prepare_trbs()
usb: gadget: introduce support for sg lists
usb: renesas: pipe: convert a long if into a XOR operation
usb: gadget: remove useless depends on Kconfig
usb: gadget: s3c-hsudc: remove the_controller global
usb: gadget: s3c-hsudc: use release_mem_region instead of release_resource
usb: gadget: s3c-hsudc: Add regulator handling
usb: gadget: s3c-hsudc: use udc_start and udc_stop functions
usb: gadget: s3c-hsudc: move device registration to probe
usb: gadget: s3c-hsudc: add missing otg_put_transceiver in probe
usb: gadget: s3c-hsudc: add __devinit to probe function
usb: gadget: s3c-hsudc: move platform_data struct to global header
USB: EHCI: Add Marvell Host Controller driver
USB: OTG: add Marvell usb OTG driver support
usb: gadget: mv_udc: drop ARCH dependency
usb: gadget: mv_udc: fix bug in ep_dequeue
usb: gadget: enlarge maxburst bit width.
...
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Gadget drivers should be compilable on all architectures.
This patch removes one dependency on architecture-specific code.
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Commit 1376d92f9 "usb: musb: allow musb and glue layers to be modules"
made the USB_MUSB_TUSB6010 option modular, but actually building
the driver as a module does not work, so various randconfig builds
actually fail. This changes all code that depends on the
option to also check for modular builds, and exports the necessary
symbols.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (65 commits)
tty: serial: imx: move del_timer_sync() to avoid potential deadlock
imx: add polled io uart methods
imx: Add save/restore functions for UART control regs
serial/imx: let probing fail for the dt case without a valid alias
serial/imx: propagate error from of_alias_get_id instead of using -ENODEV
tty: serial: imx: Allow UART to be a source for wakeup
serial: driver for m32 arch should not have DEC alpha errata
serial/documentation: fix documented name of DCD cpp symbol
atmel_serial: fix spinlock lockup in RS485 code
tty: Fix memory leak in virtual console when enable unicode translation
serial: use DIV_ROUND_CLOSEST instead of open coding it
serial: add support for 400 and 800 v3 series Titan cards
serial: bfin-uart: Remove ASYNC_CTS_FLOW flag for hardware automatic CTS.
serial: bfin-uart: Enable hardware automatic CTS only when CTS pin is available.
serial: make FSL errata depend on 8250_CONSOLE, not just 8250
serial: add irq handler for Freescale 16550 errata.
serial: manually inline serial8250_handle_port
serial: make 8250 timeout use the specified IRQ handler
serial: export the key functions for an 8250 IRQ handler
serial: clean up parameter passing for 8250 Rx IRQ handling
...
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Sending a break on the SOC UARTs found in some MPC83xx/85xx/86xx
chips seems to cause a short lived IRQ storm (/proc/interrupts
typically shows somewhere between 300 and 1500 events). Unfortunately
this renders SysRQ over the serial console completely inoperable.
The suggested workaround in the errata is to read the Rx register,
wait one character period, and then read the Rx register again.
We achieve this by tracking the old LSR value, and on the subsequent
interrupt event after a break, we don't read LSR, instead we just
read the RBR again and return immediately.
The "fsl,ns16550" is used in the compatible field of the serial
device to mark UARTs known to have this issue.
Thanks to Scott Wood for providing the errata data which led to
a much cleaner fix.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Add support to specify which HSU port to use as an early console. This can
be selected by passing "earlyprintk=hsu<n>" on the kernel command line. By
default port 0 is still used.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (31 commits)
[S390] disassembler: mark exception causing instructions
[S390] Enable exception traces by default
[S390] return address of compat signals
[S390] sysctl: get rid of dead declaration
[S390] dasd: fix fixpoint divide exception in define_extent
[S390] dasd: add sanity check to detect path connection error
[S390] qdio: fix kernel panic for zfcp 31-bit
[S390] Add s390x description to Documentation/kdump/kdump.txt
[S390] Add VMCOREINFO_SYMBOL(high_memory) to vmcoreinfo
[S390] dasd: fix expiration handling for recovery requests
[S390] outstanding interrupts vs. smp_send_stop
[S390] ipc: call generic sys_ipc demultiplexer
[S390] zcrypt: Fix error return codes.
[S390] zcrypt: Rework length parameter checking.
[S390] cleanup trap handling
[S390] Remove Kerntypes leftovers
[S390] topology: increase poll frequency if change is anticipated
[S390] entry[64].S improvements
[S390] make arch/s390 subdirectories depend on config option
[S390] kvm: move cmf host id constant out of lowcore
...
Fix up conflicts in arch/s390/kernel/{smp.c,topology.c} due to the
sysdev removal clashing with "topology: get rid of ifdefs" which moved
some of that code around.
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If an exception happens the PSW either points to the instruction that
caused the exception or to the instruction that follows the exception
causing instruction, depending on the exception type.
Since the inkernel disassembler adds a ">" in front of the disassembly
many people assume incorrectly that the instruction that is pointed to
must be the cause of the exception. To make people aware that this is
not necessarily the case add a different character in front of the
disassembled instruction that precedes the current instructions.
The output now looks like this:
Krnl PSW : 0704200180000000 0000000000120de8 (test_function+0x0/0x100)
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:2 PM:0 EA:3
Krnl GPRS: 000003ff00000000 0000000000120de4 000000000091bb40 0000000000000001
000003fffd2ea000 0000000030fb7df8 0000000030fb7f10 000003ffffa113c8
000000000091bb40 000003fffd2ea000 0000000000000002 0000000030fb7f10
000000003f290240 0000000000606220 00000000002cfb5c 0000000030fb7d58
Krnl Code: 0000000000120ddc: b90400a9 lgr %r10,%r9
0000000000120de0: a7f4ff88 brc 15,120cf0
#0000000000120de4: a7f40001 brc 15,120de6
>0000000000120de8: a7f13f80 tmll %r15,16256
0000000000120dec: eb8ff0580024 stmg %r8,%r15,88(%r15)
0000000000120df2: a7840001 brc 8,120df4
0000000000120df6: b90400ef lgr %r14,%r15
0000000000120dfa: a7fbffb8 aghi %r15,-72
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Enable exception traces by default so that early user space breakage
(e.g. broken code in initrd) can be easily indentified.
If not needed afterwards it can be disabled by writing '0' in one of
these two files:
/proc/sys/kernel/userprocess_debug
/proc/sys/debug/exception-trace
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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A 31-bit kernel always sets the high order bit in the return address
for a signal handler.
git commit d4e81b35b882d96f "[S390] allow all addressing modes" makes
sure that the high order bit is set in the signal return address for
standard signals of a 31-bit compat process but fails to do the same
for real-time signals. To make things consistent the bit needs to be
set by setup_rt_frame32 as well.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Remove dead sysctl_userprocess_debug. The variable is
gone since we map our old userprocess_debug sysctl to
the common code show_unhandled_signals sysctl on s390.
Signed-off-by: Heiko Carsten <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The queue_start_poll function pointer field in struct qdio_initialize
had to change its type and become a vector of function pointers to
support asynchronous delivery of storage blocks so rename the field to
make the type change explicit and ensure no other user of qdio tries
to use the field the old way. During setting up the qdio queues, only
dereference vector elements if the vector is actually allocated.
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: Einar Lueck <elelueck@de.ibm.com>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Currently the vmalloc_start address (or better end of real memory) for s390x
is obtained by makedumpfile using vmlist.addr symbol, which is not correct.
The correct vmalloc_start address can be obtained using 'high_memory' symbol.
This patch adds the high_memory symbol to vmcoreinfo.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The panic function will first print the panic message to the console,
then stop additional cpus with smp_send_stop and finally call the
function on the panic notifier list.
In case of an I/O based console the panic message will cause I/O to
be started and a function on the panic notifier list will wait for the
completion of the I/O. That does not work if an I/O completion interrupt
has already been delivered to a cpu that is then stopped by smp_send_stop.
To break this cyclic dependency add code to smp_send_stop that gives
the additional cpu the opportunity to complete outstanding interrupts.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Call generic IPC demultiplexer instead of having a nearly identical
s390 variant. Also make sure that native and compat handling now have
the same behaviour.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Move the program interruption code and the translation exception identifier
to the pt_regs structure as 'int_code' and 'int_parm_long' and make the
first level interrupt handler in entry[64].S store the two values. That
makes it possible to drop 'prot_addr' and 'trap_no' from the thread_struct
and to reduce the number of arguments to a lot of functions. Finally
un-inline do_trap. Overall this saves 5812 bytes in the .text section of
the 64 bit kernel.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Remove last traces of our kerntypes patch which was always an addon
patch which never got upstream. Somehow a few bits got upstream
anyway.
Since kerntypes aren't used anymore and lcrash isn't maintained (for
s390 at least) remove the last traces of kerntypes that somehow went
upstream. Also remove the documentation that mentions lcrash.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Increase cpu topology change poll frequency if a change is anticipated.
Otherwise a user might be a bit confused to have to wait up to a minute
in order to see a change this should be visible immediatly.
However there is no guarantee that the change will happen during the
time frame the poll frequency is increased.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Another round of cleanup for entry[64].S, in particular the program check
handler looks more reasonable now. The code size for the 31 bit kernel
has been reduced by 616 byte and by 528 byte for the 64 bit version.
Even better the code is a bit faster as well.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Only add subdirectories of arch/s390 to kbuild if their respective
config option is selected.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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There is no reason for the cpu-measurement-facility host id constant to
reside in the lowcore where space is precious. Use an entry in the literal
pool in HANDLE_SIE_INTERCEPT and a stack slot in sie64a.
While we are at it replace the id -1 with 0 to indicate host execution.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Cleanup z10 topology handling. This adds some more code but hopefully
the result is more readable and easier to maintain.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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This patch disables the check for MACHINE_IS_VM when initializing the
pfault infrastructure. The code checks for successful completion of
diag 258 anyway, thus it's safe to try initialization on LPAR anyway.
This is needed to use pfault on kvm
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Remove all ifdefs from topology code and also only compile it for the
CONFIG_SCHED_BOOK case. The new code selects SCHED_MC if SCHED_BOOK is
selected. SCHED_MC without SCHED_BOOK is not possible anymore.
Furthermore various sysfs attributes are not available anymore for the
!SCHED_BOOK case. In particular all attributes that correspond to
CPU polarization.
But since all real world kernels have SCHED_BOOK selected anyway this
doesn't matter too much.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Currently, when smp_switch_to_ipl_cpu() is done, the backchain in the dump
analysis tool crash looks like the following:
#0 [1f746e70] __machine_kexec at 11dd92
#1 [1f746eb8] smp_restart_cpu at 11820e
#0 [00907eb0] cpu_idle at 10602e
#1 [00907ef8] start_kernel at 979a08
It would be good to see the registers of the interrupted function.
To achieve this, the backchain on the new stack has to be set to zero.
This looks then like the following:
#0 [1f746e70] __machine_kexec at 11dd8e
#1 [1f746eb8] smp_restart_cpu at 11820a
PSW: 0706000180000000 00000000005c6fe6 (vtime_stop_cpu+134)
GPRS: 0000000000000000 00000000005c6fe6 0000000001ad0228 0000000001ad0248
0000000000907f08 0000000001ad0b40 0000000000979344 0000000000000000
00000000009c0000 00000000009c0010 00000000009ab024 0000000001ad0200
0000000001ad0238 00000000005cc9d8 000000000010602e 0000000000907e68
#0 [00907eb0] cpu_idle at 10602e
#1 [00907ef8] start_kernel at 979a08
In addition to this, now also the correct PSW is stored in the pt_regs
structure that is located at the start of the panic stack.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The kernel address space of a 64 bit kernel currently uses a three level
page table and the vmemmap array has a fixed address and a fixed maximum
size. A three level page table is good enough for systems with less than
3.8TB of memory, for bigger systems four page table levels need to be
used. Each page table level costs a bit of performance, use 3 levels for
normal systems and 4 levels only for the really big systems.
To avoid bloating sparse.o too much set MAX_PHYSMEM_BITS to 46 for a
maximum of 64TB of memory.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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This patch makes the create_mem_hole() function more readable and
fixes some minor bugs (e.g. off-by-one problems).
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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commit cc772456ac9b460693492b3a3d89e8c81eda5874
[S390] fix list corruption in gmap reverse mapping
added a potential dead lock:
BUG: sleeping function called from invalid context at mm/page_alloc.c:2260
in_atomic(): 1, irqs_disabled(): 0, pid: 1108, name: qemu-system-s39
3 locks held by qemu-system-s39/1108:
#0: (&kvm->slots_lock){+.+.+.}, at: [<000003e004866542>] kvm_set_memory_region+0x3a/0x6c [kvm]
#1: (&mm->mmap_sem){++++++}, at: [<0000000000123790>] gmap_map_segment+0x9c/0x298
#2: (&(&mm->page_table_lock)->rlock){+.+.+.}, at: [<00000000001237a8>] gmap_map_segment+0xb4/0x298
CPU: 0 Not tainted 3.1.3 #45
Process qemu-system-s39 (pid: 1108, task: 00000004f8b3cb30, ksp: 00000004fd5978d0)
00000004fd5979a0 00000004fd597920 0000000000000002 0000000000000000
00000004fd5979c0 00000004fd597938 00000004fd597938 0000000000617e96
0000000000000000 00000004f8b3cf58 0000000000000000 0000000000000000
000000000000000d 000000000000000c 00000004fd597988 0000000000000000
0000000000000000 0000000000100a18 00000004fd597920 00000004fd597960
Call Trace:
([<0000000000100926>] show_trace+0xee/0x144)
[<0000000000131f3a>] __might_sleep+0x12a/0x158
[<0000000000217fb4>] __alloc_pages_nodemask+0x224/0xadc
[<0000000000123086>] gmap_alloc_table+0x46/0x114
[<000000000012395c>] gmap_map_segment+0x268/0x298
[<000003e00486b014>] kvm_arch_commit_memory_region+0x44/0x6c [kvm]
[<000003e004866414>] __kvm_set_memory_region+0x3b0/0x4a4 [kvm]
[<000003e004866554>] kvm_set_memory_region+0x4c/0x6c [kvm]
[<000003e004867c7a>] kvm_vm_ioctl+0x14a/0x314 [kvm]
[<0000000000292100>] do_vfs_ioctl+0x94/0x588
[<0000000000292688>] SyS_ioctl+0x94/0xac
[<000000000061e124>] sysc_noemu+0x22/0x28
[<000003fffcd5e7ca>] 0x3fffcd5e7ca
3 locks held by qemu-system-s39/1108:
#0: (&kvm->slots_lock){+.+.+.}, at: [<000003e004866542>] kvm_set_memory_region+0x3a/0x6c [kvm]
#1: (&mm->mmap_sem){++++++}, at: [<0000000000123790>] gmap_map_segment+0x9c/0x298
#2: (&(&mm->page_table_lock)->rlock){+.+.+.}, at: [<00000000001237a8>] gmap_map_segment+0xb4/0x298
Fix this by freeing the lock on the alloc path. This is ok, since the
gmap table is never freed until we call gmap_free, so the table we are
walking cannot go.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The current code in setup_boot_command_line() uses a heuristic to
detect an EBCDIC command line. It checks if any of the bytes in
the command line has bit one (0x80) set. In that case it is assumed
that we have an EBCDIC string and the complete command line is
converted.
On s390 there are cases where the boot loader provides a kernel
command line that is NULL terminated, but has random data after
the NULL termination. In that case, setup_boot_command_line()
might misinterpret an ASCII string for an EBCDIC string. A
subsequent string conversion can then damage the ASCII string.
This patch solves the problem by checking for NULL termination.
If no EBCDIC character has been found until the the NULL
termination has been found, we now assume that we have an ASCII
string.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Mask the extint_code parameter of the smp external interrupt handler
to get the interruption code. Otherwise emergency call interrupts
erroneously might be accounted as emergency signal interrupts.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (53 commits)
Kconfig: acpi: Fix typo in comment.
misc latin1 to utf8 conversions
devres: Fix a typo in devm_kfree comment
btrfs: free-space-cache.c: remove extra semicolon.
fat: Spelling s/obsolate/obsolete/g
SCSI, pmcraid: Fix spelling error in a pmcraid_err() call
tools/power turbostat: update fields in manpage
mac80211: drop spelling fix
types.h: fix comment spelling for 'architectures'
typo fixes: aera -> area, exntension -> extension
devices.txt: Fix typo of 'VMware'.
sis900: Fix enum typo 'sis900_rx_bufer_status'
decompress_bunzip2: remove invalid vi modeline
treewide: Fix comment and string typo 'bufer'
hyper-v: Update MAINTAINERS
treewide: Fix typos in various parts of the kernel, and fix some comments.
clockevents: drop unknown Kconfig symbol GENERIC_CLOCKEVENTS_MIGR
gpio: Kconfig: drop unknown symbol 'CS5535_GPIO'
leds: Kconfig: Fix typo 'D2NET_V2'
sound: Kconfig: drop unknown symbol ARCH_CLPS7500
...
Fix up trivial conflicts in arch/powerpc/platforms/40x/Kconfig (some new
kconfig additions, close to removed commented-out old ones)
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One printk and one comment typo fix.
Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The below patch fixes some typos in various parts of the kernel, as well as fixes some comments.
Please let me know if I missed anything, and I will try to get it changed and resent.
Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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