Adrian Bunk [Mon, 4 Dec 2006 07:26:44 +0000 (17:26 +1000)]
[PATCH] m68knommu: fix compile when CONFIG_BLK_DEV_INITRD=n
This patch fixes the following compile error with
CONFIG_BLK_DEV_INITRD=n and -Werror-implicit-function-declaration:
...
CC arch/m68knommu/kernel/setup.o
/home/bunk/linux/kernel-2.6/linux-2.6.18-rc5-mm1/arch/m68knommu/kernel/setup.c: In function 'setup_arch':
/home/bunk/linux/kernel-2.6/linux-2.6.18-rc5-mm1/arch/m68knommu/kernel/setup.c:268: error: implicit declaration of function 'paging_init'
make[2]: *** [arch/m68knommu/kernel/setup.o] Error 1
Heiko Carstens [Mon, 4 Dec 2006 14:41:10 +0000 (15:41 +0100)]
[S390] Don't use small stacks when lockdep is used.
The lock dependency validator adds a bunch of extra stack frames to
the stack, which can cause stack overflows. Especially seen on 31 bit
where the small stack is only 4k.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cornelia Huck [Mon, 4 Dec 2006 14:41:01 +0000 (15:41 +0100)]
[S390] cio: Use path verification for last path gone after vary off.
If the last path to a device is gone after a chpid has been varied
off, putting it on the slow queue doesn't prevent a device driver
from still attempting to use it (it may stay on the slow queue for a
long time). Instead, trigger a verify event which will prevent I/O
attempts from the device driver immediately.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Ursula Braun [Mon, 4 Dec 2006 14:40:59 +0000 (15:40 +0100)]
[S390] non-unique constant/macro identifiers.
Add some prefixes to constands defined in drivers/s390/net/qdio.h
and drivers/s390/lcs.h to make it possible to include the three
header files drivers/s390/net/qeth.h, drivers/s390/net/qdio.h and
drivers/net/s390/lcs.h in one C file. This is required for the
patch that generates the kerntypes.o file for use by lcrash.
Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:56 +0000 (15:40 +0100)]
[S390] Memory detection fixes.
VMALLOC_END on 31bit should be 0x8000000UL instead of 0x7fffffffL.
The page mask which is used to make sure memory_end is on 4MB/2MB
boundary is wrong and not needed. Therefore remove it.
Make sure a vmalloc area does also exist and work on (future)
machines with 4TB and more memory.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cornelia Huck [Mon, 4 Dec 2006 14:40:54 +0000 (15:40 +0100)]
[S390] cio: Make ccw_dev_id_is_equal() more robust.
Using memcmp to compare ccw_dev_id implies that the whole structure (incl.
padding) has always been completely initialized to sane values. Comparing
the structures field by field doesn't make such assumptions.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:47 +0000 (15:40 +0100)]
[S390] lockdep: show held locks when showing a stackdump
Follow i386/x86_64:
lockdep can be used to print held locks when printing a
backtrace. This can be useful when debugging things like
'scheduling while atomic' asserts.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Gerald Schaefer [Mon, 4 Dec 2006 14:40:45 +0000 (15:40 +0100)]
[S390] Add dynamic size check for usercopy functions.
Use a wrapper for copy_to/from_user to chose the best usercopy method.
The mvcos instruction is better for sizes greater than 256 bytes, if
mvcos is not available a page table walk is better for sizes greater
than 1024 bytes. Also removed the redundant copy_to/from_user_std_small
functions.
Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:42 +0000 (15:40 +0100)]
[S390] Use diag260 for memory size detection.
Avoid the tprot loop if diag260 works and reports that there are no
holes in memory. The tprot instruction can lead to a significant delay
in the ipl process if the virtual guest has a lot of memory and the
host is under memory pressure.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:36 +0000 (15:40 +0100)]
[S390] Misaligned wait PSW at memory detection.
If the memory detection code would ever reach the point where it would
load the wait psw, it would generate a specification exception and the
system would crash at ipl time. This is because of a misaligned wait
psw. It needs to be on a double word boundary instead of a word
boundary.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:33 +0000 (15:40 +0100)]
[S390] cpu shutdown rework
Let one master cpu kill all other cpus instead of sending an external
interrupt to all other cpus so they can kill themselves.
Simplifies reipl/shutdown functions a lot.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:30 +0000 (15:40 +0100)]
[S390] cpcmd <-> __cpcmd calling issues
In case of reipl cpcmd gets called when all other cpus are not running
anymore. To prevent deadlocks change __cpcmd so that it doesn't take
any locks and call cpcmd or __cpcmd, whatever is correct in the current
context.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:28 +0000 (15:40 +0100)]
[S390] Bad kexec control page allocation.
KEXEC_CONTROL_MEMORY_LIMIT is an unsigned long value and therefore
should be defined as one. Otherwise the kexec control page can be
allocated above 2GB which will cause a specification exception on the
sam31 instruction in the s390 kexec relocation code.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:26 +0000 (15:40 +0100)]
[S390] Reset infrastructure for re-IPL.
In case of re-IPL and diag308 doesn't work we have to reset all devices
manually and wait synchronously that each reset finished.
This patch adds the necessary infrastucture and the first exploiter of it.
Subsystems that need to add a function that needs to be called at re-IPL
may register/unregister this function via
When the registered function get called the context is:
- all cpus beside the current one are stopped
- all machine checks and interrupts are disabled
- prefixing is disabled
- a default machine check handler is available for use
The registered functions may not take any locks are sleep.
For the common I/O layer part of this patch:
Introduce a reset_call css_reset that does the following:
- clear all subchannels
- perform a rchp on all channel paths and wait for the resulting
machine checks
This replaces the calls to clear_all_subchannels() and
cio_reset_channel_paths() for kexec and ccw reipl. reipl_ccw_dev() now
uses reipl_find_schid() to determine the subchannel id for a given
device id.
Also remove cio_reset_channel_paths() and friends since they are not
needed anymore.
Heiko Carstens [Mon, 4 Dec 2006 14:40:20 +0000 (15:40 +0100)]
[S390] extmem unbalanced spin_lock.
segment save will exit with a lock held if the passed segment doesn't
exist. Any subsequent call to segment_save will lead to a deadlock.
Fix this and give up the lock before returning.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Horst Hummel [Mon, 4 Dec 2006 14:40:15 +0000 (15:40 +0100)]
[S390] Enhanced handling of failed termination requests.
In case a request timed out and termination did not work, the console was
flooded with retry messages (every 1/10s). Now we use a 5s delay per retry and
generate a more precise message.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Michael Holzheu [Mon, 4 Dec 2006 14:40:13 +0000 (15:40 +0100)]
[S390] Use diag instead of ccw reipl.
Since the diag 308 reipl method is superior to the ccw method, we should
use it whenever it is possible. We can do that, if the user has not
specified a new reipl ccw device and the system has been ipled from
a ccw device.
Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 4 Dec 2006 14:40:02 +0000 (15:40 +0100)]
[S390] termio <-> termios conversion error handling.
Get rid of our own user_termio_to_kernel_termios() and
kernel_termios_to_user_termio() macros which didn't check for errors
on user space accesses. Instead use the generic functions which
handle this properly.
In addition the generic version of user_termio_to_kernel_termios()
also copies the c_line member which was missing in our variant.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Michael Holzheu [Mon, 4 Dec 2006 14:39:58 +0000 (15:39 +0100)]
[S390] Add ipl/reipl loadparm attribute.
If multiple kernel images are installed on one DASD, the loadparm can be used
to select the boot configuration. This patch introduces the following two new
sysfs attributes:
/sys/firmware/ipl/loadparm: shows loadparm of current system (ro)
/sys/firmware/reipl/ccw/loadparm: loadparm used for next reboot (rw)
Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Horst Hummel [Mon, 4 Dec 2006 14:39:50 +0000 (15:39 +0100)]
[S390] handle incorrect values when writing to dasd sysfs attributes.
When writing to dasd attributes (e.g. readonly), all values besides '1'
are handled like '0'.
Other sysfs-attributes like 'online' are checking for '1' and for '0'
and do not accept other values. Therefore enhanced checking and error
handling in dasd_devmap attribute store functions.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The SALIPL entry point has an needless memory detection routine as we
later check the memory size again. The SALIPL code also uses diagnose
0x060 if we are running under VM, but this diagnose is not compatible
with the 64 bit addressing mode. The solution is to get rid of this
code and rely on the memory detection in the startup code.
Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sergei Shtylyov [Sun, 3 Dec 2006 17:52:27 +0000 (20:52 +0300)]
[POWERPC] Fix debug printks for 32-bit resources in the PCI code
Cure the damage done by the former PCI debug printks fix for the case
of 64-bit resources (commit 685143ac1f7a579a3fac9c7f2ac8f82e95af6864)
which broke it for the plain vanilla 32-bit resources...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Linas Vepstas [Wed, 29 Nov 2006 18:05:22 +0000 (12:05 -0600)]
[POWERPC] Change ppc64_defconfig to use AUTOFS_V4 not V3
Defconfig ppc64 kernels running under late-model distros
may hang in the automounter rc.d script, which seems to be
expecting autofs version 4. This patch uses the newer autofs.
Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Olof Johansson [Tue, 28 Nov 2006 03:21:29 +0000 (21:21 -0600)]
[POWERPC] Fix OF pci flags parsing
For PCI devices with only io ports, of_bus_pci_get_flags() will fall
through and still mark the resource as IORESOURCE_MEM.
Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Grant Likely [Mon, 27 Nov 2006 21:16:27 +0000 (14:16 -0700)]
[POWERPC] Add common routines for 52xx support in arch/powerpc
Adds utility routines used by 52xx device drivers and board support
code. Main functionality is to add device nodes to the of_platform_bus,
retrieve the IPB bus frequency, and find+ioremap device registers.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Grant Likely [Mon, 27 Nov 2006 21:16:25 +0000 (14:16 -0700)]
[POWERPC] Move Efika support files into platforms/52xx
The Efika board isn't different enough from other 52xx based boards to
justify a separate platform. This patch merges it with the support
code for all other 52xx based boards.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Grant Likely [Mon, 27 Nov 2006 21:16:24 +0000 (14:16 -0700)]
[POWERPC] Put mpc52xx support file in platforms/52xx
platforms/embedded6xx is probably going away, and 52xx boards need
some extra support the 52xx interrupt controller and DMA engine
anyway. It makes sense to group all the 52xx bits into a single path.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Michael Ellerman [Sun, 26 Nov 2006 06:36:15 +0000 (17:36 +1100)]
[POWERPC] Provide dummy hard_irq_enable/disable() for PPC32
To allow arch/powerpc/kernel/crash.c to build on 32-bit we need a
definition of hard_irq_disable(). 32-bit doesn't support the lazy
interrupt disabling mechanism, so on 32-bit hard_irq_disable() is
simply local_irq_disable(). Add a definition for hard_irq_enable()
just for completeness.
"extern inline" generates a warning with -Wmissing-prototypes and I'm
currently working on getting the kernel cleaned up for adding this to
the CFLAGS since it will help us to avoid a nasty class of runtime
errors.
If there are places that really need a forced inline, __always_inline
would be the correct solution.
Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
Vitaly Wool [Mon, 20 Nov 2006 13:32:39 +0000 (16:32 +0300)]
[POWERPC] Add of_platform support for ROM devices
This adds support for flash device descriptions to the OF device tree.
It's inspired by and partially borrowed from Sergei's patch "[RFC]
Adding MTD to device tree.patch".
Signed-off-by: Vitaly Wool <vwool@ru.mvista.com> Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Mohan Kumar M [Fri, 17 Nov 2006 12:12:24 +0000 (17:42 +0530)]
[POWERPC] pSeries/kexec: Fix for interrupt distribution
This allows any secondary CPU thread also to become boot cpu for
POWER5. The patch is required to solve kdump boot issue when the
kdump kernel is booted with parameter "maxcpus=1". XICS init code
tries to match the current boot cpu id with "reg" property in each CPU
node in the device tree. But CPU node is created only for primary
thread CPU ids and "reg" property only reflects primary CPU ids. So
when a kernel is booted on a secondary cpu thread above condition will
never meet and the default distribution server is left as zero. This
leads to route the interrupts to CPU 0, but which is not online at
this time.
We use ibm,ppc-interrupt-server#s to check for both primary and
secondary CPU ids. Accordingly default distribution server value is
initialized from "ibm,ppc-interrupt-gserver#s" property. We loop
through ibm,ppc-interrupt-gserver#s property to find the global
distribution server from the last entry that matches with boot cpuid.
Signed-off-by: Mohan Kumar M <mohan@in.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Arnd Bergmann [Mon, 27 Nov 2006 18:18:58 +0000 (19:18 +0100)]
[POWERPC] ps3: add a default zImage target
It's currently not possible to build the default zImage
target if PS3 is the only selected platform. This is
a hack to fall back to building the pseries style
zImage, so the build is successful. This will probably
change in the future, if someone writes a PS3 specific
boot wrapper.
Arnd Bergmann [Mon, 27 Nov 2006 18:18:57 +0000 (19:18 +0100)]
[POWERPC] ps3: multiplatform build fixes
A few code paths need to check whether or not they are running
on the PS3's LV1 hypervisor before making hcalls. This introduces
a new firmware feature bit for this, FW_FEATURE_PS3_LV1.
Now when both PS3 and IBM_CELL_BLADE are enabled, but not PSERIES,
FW_FEATURE_PS3_LV1 and FW_FEATURE_LPAR get enabled at compile time,
which is a bug. The same problem can also happen for (PPC_ISERIES &&
!PPC_PSERIES && PPC_SOMETHING_ELSE). In order to solve this, I
introduce a new CONFIG_PPC_NATIVE option that is set when at least
one platform is selected that can run without a hypervisor and then
turns the firmware feature check into a run-time option.
The new cell oprofile support that was recently merged does not
work on hypervisor based platforms like the PS3, therefore make
it depend on PPC_CELL_NATIVE instead of PPC_CELL. This may change
if we get oprofile support for PS3.
Arnd Bergmann [Mon, 27 Nov 2006 18:18:55 +0000 (19:18 +0100)]
[POWERPC] cell: fix building without spufs
It may be desireable to build a kernel for cell without
spufs, e.g. as the initial kboot kernel. This requires
that the SPU specific parts of the core dump and the xmon
code depend on CONFIG_SPU_BASE instead of CONFIG_PPC_CELL.
Arnd Bergmann [Mon, 27 Nov 2006 18:18:53 +0000 (19:18 +0100)]
[POWERPC] spufs: always send sigtrap on breakpoint
Currently, we only send a sigtrap if the current task is being ptraced.
This is somewhat inconsistant, and it breaks utrace support in fedora.
Removing the check should do the right thing in all cases.
Jeremy Kerr [Mon, 27 Nov 2006 18:18:52 +0000 (19:18 +0100)]
[POWERPC] spufs: return an error in spu_create is isolated create isnt supported
This changes the spu_create system call to return an error (-ENODEV) if
and isolated spu context is requested on hardware that doesn't support
isolated mode.
Tested on systemsim with and without isolation support
Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Mike Wolf [Tue, 21 Nov 2006 20:41:54 +0000 (14:41 -0600)]
[POWERPC] powerpc: Make 970MP detectable by oprofile
Change the oprofile_cpu_type in cputables.c to be ppc64/970MP. Oprofile
needs to distinquish the MP from other 970 processors so it can add some
new counters specific to the 970MP.
Signed-off-by: Mike Wolf <mjw@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Geoff Levand [Wed, 22 Nov 2006 23:46:58 +0000 (00:46 +0100)]
[POWERPC] ps3: add OS params support
Adds support for early access to the parameter data from the PS3 'Other OS'
flash memory area. The parameter data mainly holds user preferences like
static ip address.
Geoff Levand [Wed, 22 Nov 2006 23:46:57 +0000 (00:46 +0100)]
[POWERPC] ps3: add lpar addressing
Adds some needed bits for a config option PS3_USE_LPAR_ADDR that disables
the PS3 lpar address translation mechanism. This is a currently needed
workaround for limitations in the design of the generic cell spu support.
Geoff Levand [Wed, 22 Nov 2006 23:46:49 +0000 (00:46 +0100)]
[POWERPC] cell: abstract spu management routines
This adds a platform specific spu management abstraction and the coresponding
routines to support the IBM Cell Blade. It also removes the hypervisor only
resources that were included in struct spu.
Three new platform specific routines are introduced, spu_enumerate_spus(),
spu_create_spu() and spu_destroy_spu(). The underlying design uses a new
type, struct spu_management_ops, to hold function pointers that the platform
setup code is expected to initialize to instances appropriate to that platform.
For the IBM Cell Blade support, I put the hypervisor only resources that were
in struct spu into a platform specific data structure struct spu_pdata.
Michael Ellerman [Wed, 22 Nov 2006 23:46:45 +0000 (00:46 +0100)]
[POWERPC] Make xmon disassembly optional
While adding spu disassembly support it struck me that we're actually
carrying quite a lot of code around, just to do disassembly in the case
of a crash.
While on large systems it's not an issue, on smaller ones it might be
nice to have xmon - but without the weight of the disassembly support.
For a Cell build this saves ~230KB (!), and for pSeries ~195KB.
We still support the 'di' and 'sdi' commands, however they just dump
the instruction in hex.
Move the definitions into a header to clean xmon.c just a tiny bit.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Michael Ellerman [Wed, 22 Nov 2006 23:46:43 +0000 (00:46 +0100)]
[POWERPC] Import spu disassembly code into xmon
This patch imports and munges the spu disassembly code from binutils.
All files originated from version 1.1 in binutils cvs.
* spu.h, spu-insns.h and spu-opc.c are unchanged except for pathnames.
* spu-dis.c has been edited heavily:
* use printf instead of info->fprintf_func and similar.
* pass the instruction in rather than reading it.
* we have no equivalent to symbol_at_address_func, so we just assume
there is never a symbol at the address given.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Michael Ellerman [Wed, 22 Nov 2006 23:46:42 +0000 (00:46 +0100)]
[POWERPC] Prepare for spu disassembly in xmon
In order to do disassembly of spu binaries in xmon, we need to abstract
the disassembly function from ppc_inst_dump.
We do this by making the actual disassembly function a function pointer
that we pass to ppc_inst_dump(). To save updating all the callers, we
turn ppc_inst_dump() into generic_inst_dump() and make ppc_inst_dump()
a wrapper which always uses print_insn_powerpc().
Currently we pass the dialect into print_insn_powerpc(), but we always
pass 0 - so just make it a local.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>