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* pstore: add lzo/lz4 compression supportGeliang Tang2016-06-021-1/+3
| | | | | | | | | | | | | | | | Like zlib compression in pstore, this patch added lzo and lz4 compression support so that users can have more options and better compression ratio. The original code treats the compressed data together with the uncompressed ECC correction notice by using zlib decompress. The ECC correction notice is missing in the decompression process. The treatment also makes lzo and lz4 not working. So I treat them separately by using pstore_decompress() to treat the compressed data, and memcpy() to treat the uncompressed ECC correction notice. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Kees Cook <keescook@chromium.org>
* powerpc: make kernel/nvram_64.c explicitly non-modularPaul Gortmaker2016-04-111-11/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Makefile/Kconfig currently controlling compilation of this code is: obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \ signal_64.o ptrace32.o \ paca.o nvram_64.o firmware.o arch/powerpc/platforms/Kconfig.cputype:config PPC64 arch/powerpc/platforms/Kconfig.cputype: bool "64-bit kernel" ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. We don't replace module.h with init.h since the file already has that. We delete the MODULE_LICENSE tag since that information is already contained at the top of the file in the comments. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Hari Bathini <hbathini@linux.vnet.ibm.com> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Andrzej Hajda <a.hajda@samsung.com> Cc: Anton Blanchard <anton@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* don't open-code generic_file_llseek_size()Al Viro2015-12-091-16/+3Star
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* powerpc/nvram: Fix function name in some errors messages.Christophe Jaillet2015-10-021-7/+7
| | | | | | | | 'nvram_create_os_partition' should be 'nvram_create_partition'. Use __func__ to have it right, as done elsewhere in this file. Signed-off-by: Christophe Jaillet <christophe.jaillet@wanadoo.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/nvram: Add missing kfree in error pathChristophe Jaillet2015-10-021-0/+1
| | | | | | | | If 'nvram_write_header' fails, then 'new_part' should be freed, otherwise, there is a memory leak. Signed-off-by: Christophe Jaillet <christophe.jaillet@wanadoo.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/nvram: print no error when pstore backend is not nvramHari Bathini2015-08-191-3/+4
| | | | | | | | | | | | Pstore only supports one backend at a time. The preferred pstore backend is set by passing the pstore.backend=<name> argument to the kernel at boot time. Currently, while trying to register with pstore, nvram throws an error message even when "pstore.backend != nvram", which is unnecessary. This patch removes the error message in case "pstore.backend != nvram". Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/nvram: use kmemdup rather than duplicating its implementationAndrzej Hajda2015-08-181-2/+1Star
| | | | | | | | | | | The patch was generated using fixed coccinelle semantic patch scripts/coccinelle/api/memdup.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2014320 Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/rtas: Make timestamp related code y2038-safeHari Bathini2015-03-231-3/+3
| | | | | | | | While we are here, let us make timestamp related code y2038-safe. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Add pstore support on powernvHari Bathini2015-03-231-2/+23
| | | | | | | | | | | | | | | | | | This patch extends pstore, a generic interface to platform dependent persistent storage, support for powernv platform to capture certain useful information, during dying moments. Such support is already in place for pseries platform. This patch re-uses most of that code. It is a common practice to compile kernels with both CONFIG_PPC_PSERIES=y and CONFIG_PPC_POWERNV=y. The code in nvram_init_oops_partition() routine still works as intended, as the caller is platform specific code which passes the appropriate value for "rtas_partition_exists" parameter. In all other places, where CONFIG_PPC_PSERIES or CONFIG_PPC_POWERNV flag is used in this patchset, it is to reduce the kernel size in cases where this flag is not set and doesn't have any impact logic wise. Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/nvram: Move generic code for nvram and pstoreHari Bathini2015-03-231-0/+656
| | | | | | | | | | | With minor checks, we can move most of the code for nvram under pseries to a common place to be re-used by other powerpc platforms like powernv. This patch moves such common code to arch/powerpc/kernel/nvram_64.c file. Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> [mpe: Move select of ZLIB_DEFLATE to PPC64 to fix the build] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: Make a bunch of things staticAnton Blanchard2014-09-251-1/+1
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* arch/powerpc/kernel: Use %12.12s instead of %12s to avoid memory overflowChen Gang2013-11-251-1/+1
| | | | | | | | | | | | | | | | | for tmp_part->header.name: it is "Terminating null required only for names < 12 chars". so need to limit the %.12s for it in printk additional info: %12s limit the width, not for the original string output length if name length is more than 12, it still can be fully displayed. if name length is less than 12, the ' ' will be filled before name. %.12s truly limit the original string output length (precision) Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Fix endian issue when using the partition lengthCedric Le Goater2013-10-311-2/+8
| | | | | | | | | | | | | | When reading partitions, the length has to be translated from big endian to the endian order of the host. Similarly, when writing partitions, the length needs to be in big endian order. The userspace tool 'nvram' needs a similar fix as it is reading and writing partitions through /dev/nram : http://sourceforge.net/p/powerpc-utils/mailman/message/31571277/ Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram64: Need return the related error code on failure occursChen Gang2013-07-011-6/+14
| | | | | | | | | | | | | | When error occurs, need return the related error code to let upper caller know about it. ppc_md.nvram_size() can return the error code (e.g. core99_nvram_size() in 'arch/powerpc/platforms/powermac/nvram.c'). Also set ret value when only need it, so can save structions for normal cases. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: remove cast for kmalloc/kzalloc return valueZhang Yanfei2013-03-181-2/+1Star
| | | | | | | | | | | remove cast for kmalloc/kzalloc return value. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* powerpc/nvram: Generalize code for OS partitions in NVRAMJim Keniston2011-03-041-4/+27
| | | | | | | | Adapt the functions used to create and write to the RTAS-log partition to work with any OS-type partition. Signed-off-by: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Handle partition names >= 12 charsJim Keniston2010-11-301-2/+3
| | | | | | | | The name field in the nvram_header can be < 12 chars, null-terminated, or 12 chars without the null. Handle this safely. Signed-off-by: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Fix NVRAM partition list setupJim Keniston2010-11-301-18/+8Star
| | | | | | | Simplify creation and use of the NVRAM partition list. Signed-off-by: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Move the log partition stuff to pseriesBenjamin Herrenschmidt2010-11-301-236/+18Star
| | | | | | | | | | The nvram log partition stuff currently in nvram_64.c is really pseries specific. It isn't actually used on anything else (despite the fact that we ran the code to setup the partition on anything except powermac) and the log format is specific to pseries RTAS implementation. So move it where it belongs Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Change nvram_setup_partition() to use new helperBenjamin Herrenschmidt2010-11-301-39/+32Star
| | | | | | | | This changes the function to use nvram_find_partition() instead of doing the lookup "by hand". It also makes some of the logic clearer and prints out more useful diagnostic information. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Add nvram_find_partition()Benjamin Herrenschmidt2010-11-301-0/+22
| | | | Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Improve partition removalBenjamin Herrenschmidt2010-11-301-48/+43Star
| | | | | | | | | | | | Existing code is nasty, has bugs etc... rewrite the function more simply, and make it take the signature and optional name of the partitions to remove as arguments, thus making it a more generic utility. We also try to remove a log partition that we find and is too small rather than creating a duplicate. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Shuffle code around in nvram_create_partition()Benjamin Herrenschmidt2010-11-301-46/+62
| | | | | | | | | | | This error log stuff is really pseries specific. As a first step we move the initialization of these variables to the caller of nvram_create_partition(), which is also slightly reorganized so we setup the free partition before we clear the new partition, so the chance of an error during clear leaving us with invalid headers is lessened. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Completely clear a new partitionBenjamin Herrenschmidt2010-11-301-9/+10
| | | | | | | | When creating a partition, we clear it entirely rather than just the first two words since the previous code was rather specific to the pseries log partition format. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Ensure that the partition header/block size is rightBenjamin Herrenschmidt2010-11-301-0/+2
| | | | | | | Use BUILD_BUG_ON to ensure the structure representing a partition header have the right size. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: nvram_create_partitions() now uses bytesBenjamin Herrenschmidt2010-11-301-6/+14
| | | | | | | | | | This converts nvram_create_partition() to use a size in bytes rather than blocks. It does the appropriate alignment internally The size passed is also the data size (ie. doesn't include the header anymore). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: More flexible nvram_create_partition()Benjamin Herrenschmidt2010-11-301-18/+28
| | | | | | | Replace nvram_create_os_partition() with a variant that takes the partition name, signature and size as arguments. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram: Move things out of asm/nvram.hBenjamin Herrenschmidt2010-11-301-1/+20
| | | | | | | | | This moves a bunch of definitions out of asm/nvram.h to the files that use them or just outright remove completely unused stuff. We leave the partition signatures definitions, they will be useful Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* arch/powerpc: Fix continuation line formatsJoe Perches2010-02-091-3/+3
| | | | | | | | String constants that are continued on subsequent lines with \ are not good. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Use unlocked ioctl in nvram_64Thomas Gleixner2009-11-241-7/+7
| | | | | | | | | | | The ioctl is only used for powermac systems and reads a partition number from an array which is initialized at boot time way before the nvram code is initialized. So it's safe to switch to unlocked_ioctl. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram_64: Mark init code __initThomas Gleixner2009-10-301-7/+7
| | | | | | | | | Mark all functions which are only called from nvram_init() __init. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram_64: Check nvram_error_log_index in nvram_clear_error_log()Thomas Gleixner2009-10-301-0/+3
| | | | | | | | | | | | | nvram_clear_error_log() calls ppc_md.nvram_write() even when nvram_error_log_index is -1 (invalid). The nvram_write() function does not check for a negative offset. Check nvram_error_log_index as the other nvram log functions do. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/nvram_64: Remove unused codeThomas Gleixner2009-10-301-25/+0Star
| | | | | | | | | | nvram_find_partition() has no user. The call site was removed in the arch/powerpc move, but the function stayed. Remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* [POWERPC] pseries: Eliminate global error_log_cnt variableLinas Vepstas2007-08-171-5/+5
| | | | | | | | | | | | | | | | | | Eliminate the use of error_log_cnt as a global var shared across different directories. Pass it as a parameter instead. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> ---- Respin of earlier patch, with the CONFIG_PSERIES junk removed from the header file. arch/powerpc/kernel/nvram_64.c | 10 +++++----- arch/powerpc/platforms/pseries/rtasd.c | 7 ++++--- include/asm-powerpc/nvram.h | 6 ++++-- 3 files changed, 13 insertions(+), 10 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] pseries: Fix jumbled no_logging flagLinas Vepstas2007-08-171-8/+0Star
| | | | | | | | | | | | | | | | Get rid of the jumbled usage of the no_logging flag. Its use spans several directories, and is incorrectly/misleadingly documented. Instead, two changes: 1) nvram will accept error log as soon as its ready. 2) logging to nvram stops on the first fatal error reported. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> ---- arch/powerpc/kernel/nvram_64.c | 8 -------- arch/powerpc/platforms/pseries/rtasd.c | 14 ++++++-------- 2 files changed, 6 insertions(+), 16 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Remove nvram forward declarationsLinas Vepstas2007-08-171-5/+0Star
| | | | | | | | | | | | Forward declarations serve no purpose in this file. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> ---- arch/powerpc/kernel/nvram_64.c | 5 ----- 1 file changed, 5 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] mark struct file_operations const 2Arjan van de Ven2007-02-121-1/+1
| | | | | | | | | | | | Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. [akpm@osdl.org: sparc64 fix] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] getting rid of all casts of k[cmz]alloc() callsRobert P. J. Day2006-12-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Run this: #!/bin/sh for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do echo "De-casting $f..." perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f done And then go through and reinstate those cases where code is casting pointers to non-pointers. And then drop a few hunks which conflicted with outstanding work. Cc: Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Greg KH <greg@kroah.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Karsten Keil <kkeil@suse.de> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Ian Kent <raven@themaw.net> Cc: Steven French <sfrench@us.ibm.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvram_print_partitions cosmetic fixupWill Schmidt2006-04-291-1/+1
| | | | | | | | | | | This is a cosmetic fixup. When printing the nvram partition table, the first couple entries have a shorter 'index' value than the others, so table is a bit askew. This change makes the table look pretty. Tested on pseries and g5. Footnote: yes, this table is normally hidden behind a DEBUG_NVRAM #define. Signed-off-by: Will Schmidt <willschm@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Kill _machine and hard-coded platform numbersBenjamin Herrenschmidt2006-03-281-2/+2
| | | | | | | | | | | | | | | | This removes statically assigned platform numbers and reworks the powerpc platform probe code to use a better mechanism. With this, board support files can simply declare a new machine type with a macro, and implement a probe() function that uses the flattened device-tree to detect if they apply for a given machine. We now have a machine_is() macro that replaces the comparisons of _machine with the various PLATFORM_* constants. This commit also changes various drivers to use the new macro instead of looking at _machine. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: fix various sparse warningsStephen Rothwell2006-03-271-1/+2
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: fix large nvram accessArnd Bergmann2006-01-091-56/+50Star
| | | | | | | | | | /dev/nvram uses the user-provided read/write size for kmalloc, which fails, if a large number is passed. This will always use a single page at most, which can be expected to succeed. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Move remaining .c files from arch/ppc64 to arch/powerpcPaul Mackerras2005-11-181-0/+742
This also deletes the now-unused Makefiles under arch/ppc64. Both of the files moved over could use some merging, but for now I have moved them as-is and arranged for them to be used only in 64-bit kernels. For 32-bit kernels we still use arch/ppc/kernel/idle.c and drivers/char/generic_nvram.c as before. Signed-off-by: Paul Mackerras <paulus@samba.org>
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