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path: root/arch/powerpc/kernel/lparcfg.c
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2012-03-28Disintegrate asm/system.h for PowerPCDavid Howells1-1/+0
Disintegrate asm/system.h for PowerPC. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> cc: linuxppc-dev@lists.ozlabs.org
2012-03-21powerpc: Remove FW_FEATURE ISERIES from arch codeStephen Rothwell1-101/+7
This is no longer selectable, so just remove all the dependent code. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-01-04switch procfs to umode_t useAl Viro1-1/+1
both proc_dir_entry ->mode and populating functions Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-05-04powerpc/pseries: Add page coalescing supportBrian King1-28/+25
Adds support for page coalescing, which is a feature on IBM Power servers which allows for coalescing identical pages between logical partitions. Hint text pages as coalesce candidates, since they are the most likely pages to be able to be coalesced between partitions. This patch also exports some page coalescing statistics available from firmware via lparcfg. [BenH: Moved a couple of things around to fix compile problems] Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-03-31Fix common misspellingsLucas De Marchi1-1/+1
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2010-10-22Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bklLinus Torvalds1-0/+1
* 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl: vfs: make no_llseek the default vfs: don't use BKL in default_llseek llseek: automatically add .llseek fop libfs: use generic_file_llseek for simple_attr mac80211: disallow seeks in minstrel debug code lirc: make chardev nonseekable viotape: use noop_llseek raw: use explicit llseek file operations ibmasmfs: use generic_file_llseek spufs: use llseek in all file operations arm/omap: use generic_file_llseek in iommu_debug lkdtm: use generic_file_llseek in debugfs net/wireless: use generic_file_llseek in debugfs drm: use noop_llseek
2010-10-15llseek: automatically add .llseek fopArnd Bergmann1-0/+1
All file_operations should get a .llseek operation so we can make nonseekable_open the default for future file operations without a .llseek pointer. The three cases that we can automatically detect are no_llseek, seq_lseek and default_llseek. For cases where we can we can automatically prove that the file offset is always ignored, we use noop_llseek, which maintains the current behavior of not returning an error from a seek. New drivers should normally not use noop_llseek but instead use no_llseek and call nonseekable_open at open time. Existing drivers can be converted to do the same when the maintainer knows for certain that no user code relies on calling seek on the device file. The generated code is often incorrectly indented and right now contains comments that clarify for each added line why a specific variant was chosen. In the version that gets submitted upstream, the comments will be gone and I will manually fix the indentation, because there does not seem to be a way to do that using coccinelle. Some amount of new code is currently sitting in linux-next that should get the same modifications, which I will do at the end of the merge window. Many thanks to Julia Lawall for helping me learn to write a semantic patch that does all this. ===== begin semantic patch ===== // This adds an llseek= method to all file operations, // as a preparation for making no_llseek the default. // // The rules are // - use no_llseek explicitly if we do nonseekable_open // - use seq_lseek for sequential files // - use default_llseek if we know we access f_pos // - use noop_llseek if we know we don't access f_pos, // but we still want to allow users to call lseek // @ open1 exists @ identifier nested_open; @@ nested_open(...) { <+... nonseekable_open(...) ...+> } @ open exists@ identifier open_f; identifier i, f; identifier open1.nested_open; @@ int open_f(struct inode *i, struct file *f) { <+... ( nonseekable_open(...) | nested_open(...) ) ...+> } @ read disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ read_no_fpos disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { ... when != off } @ write @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ write_no_fpos @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { ... when != off } @ fops0 @ identifier fops; @@ struct file_operations fops = { ... }; @ has_llseek depends on fops0 @ identifier fops0.fops; identifier llseek_f; @@ struct file_operations fops = { ... .llseek = llseek_f, ... }; @ has_read depends on fops0 @ identifier fops0.fops; identifier read_f; @@ struct file_operations fops = { ... .read = read_f, ... }; @ has_write depends on fops0 @ identifier fops0.fops; identifier write_f; @@ struct file_operations fops = { ... .write = write_f, ... }; @ has_open depends on fops0 @ identifier fops0.fops; identifier open_f; @@ struct file_operations fops = { ... .open = open_f, ... }; // use no_llseek if we call nonseekable_open //////////////////////////////////////////// @ nonseekable1 depends on !has_llseek && has_open @ identifier fops0.fops; identifier nso ~= "nonseekable_open"; @@ struct file_operations fops = { ... .open = nso, ... +.llseek = no_llseek, /* nonseekable */ }; @ nonseekable2 depends on !has_llseek @ identifier fops0.fops; identifier open.open_f; @@ struct file_operations fops = { ... .open = open_f, ... +.llseek = no_llseek, /* open uses nonseekable */ }; // use seq_lseek for sequential files ///////////////////////////////////// @ seq depends on !has_llseek @ identifier fops0.fops; identifier sr ~= "seq_read"; @@ struct file_operations fops = { ... .read = sr, ... +.llseek = seq_lseek, /* we have seq_read */ }; // use default_llseek if there is a readdir /////////////////////////////////////////// @ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier readdir_e; @@ // any other fop is used that changes pos struct file_operations fops = { ... .readdir = readdir_e, ... +.llseek = default_llseek, /* readdir is present */ }; // use default_llseek if at least one of read/write touches f_pos ///////////////////////////////////////////////////////////////// @ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read.read_f; @@ // read fops use offset struct file_operations fops = { ... .read = read_f, ... +.llseek = default_llseek, /* read accesses f_pos */ }; @ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, ... + .llseek = default_llseek, /* write accesses f_pos */ }; // Use noop_llseek if neither read nor write accesses f_pos /////////////////////////////////////////////////////////// @ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; identifier write_no_fpos.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, .read = read_f, ... +.llseek = noop_llseek, /* read and write both use no f_pos */ }; @ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write_no_fpos.write_f; @@ struct file_operations fops = { ... .write = write_f, ... +.llseek = noop_llseek, /* write uses no f_pos */ }; @ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; @@ struct file_operations fops = { ... .read = read_f, ... +.llseek = noop_llseek, /* read uses no f_pos */ }; @ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; @@ struct file_operations fops = { ... +.llseek = noop_llseek, /* no read or write fn */ }; ===== End semantic patch ===== Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Julia Lawall <julia@diku.dk> Cc: Christoph Hellwig <hch@infradead.org>
2010-09-02powerpc: Abstract indexing of lppaca structsPaul Mackerras1-7/+7
Currently we have the lppaca structs as a simple array of NR_CPUS entries, taking up space in the data section of the kernel image. In future we would like to allocate them dynamically, so this abstracts out the accesses to the array, making it easier to change how we locate the lppaca for a given cpu in future. Specifically, lppaca[cpu] changes to lppaca_of(cpu). Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-04-07powerpc/pseries: Export data from new hcall H_EM_GET_PARMSVaidyanathan Srinivasan1-1/+11
Add support for H_EM_GET_PARMS hcall that will return data related to power modes from the platform. Export the data directly to user space for administrative tools to interpret and use. cat /proc/powerpc/lparcfg will export power mode data Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo1-0/+1
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-02-09powerpc: Remove trailing space in messagesFrans Pop1-5/+5
Signed-off-by: Frans Pop <elendil@planet.nl> Cc: linuxppc-dev@ozlabs.org Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30powerpc: Move /proc/ppc64 to /proc/powerpc and add symlinkBenjamin Herrenschmidt1-2/+2
Some of the stuff in /proc/ppc64 such as the RTAS bits are actually useful to some 32-bit platforms. Rename the file, and create a symlink on 64-bit for backward compatibility Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-09-02powerpc/pseries: Fix to handle slb resize across migrationBrian King1-0/+3
The SLB can change sizes across a live migration, which was not being handled, resulting in possible machine crashes during migration if migrating to a machine which has a smaller max SLB size than the source machine. Fix this by first reducing the SLB size to the minimum possible value, which is 32, prior to migration. Then during the device tree update which occurs after migration, we make the call to ensure the SLB gets updated. Also add the slb_size to the lparcfg output so that the migration tools can check to make sure the kernel has this capability before allowing migration in scenarios where the SLB size will change. BenH: Fixed #include <asm/mmu-hash64.h> -> <asm/mmu.h> to avoid breaking ppc32 build Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-02powerpc: Display processor virtualization resource allocs in lparcfgNathan Fontenot1-2/+38
This patch updates the output from /proc/ppc64/lparcfg to display the processor virtualization resource allocations for a shared processor partition. This information is already gathered via the h_get_ppp call, we just have to make sure that the ibm,partition-performance-parameters-level property is >= 1 to ensure that the information is valid. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-04-07powerpc/pseries: Add dispatch dispersion statisticsAnton Blanchard1-0/+16
PHYP tells us how often a shared processor dispatch changed physical cpus. This can highlight performance problems caused by the hypervisor. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2009-01-13powerpc: Change u64/s64 to a long long integer typeIngo Molnar1-5/+5
Convert arch/powerpc/ over to long long based u64: -#ifdef __powerpc64__ -# include <asm-generic/int-l64.h> -#else -# include <asm-generic/int-ll64.h> -#endif +#include <asm-generic/int-ll64.h> This will avoid reoccuring spurious warnings in core kernel code that comes when people test on their own hardware. (i.e. x86 in ~98% of the cases) This is what x86 uses and it generally helps keep 64-bit code 32-bit clean too. [Adjusted to not impact user mode (from paulus) - sfr] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-08-20powerpc: Replace __FUNCTION__ with __func__Harvey Harrison1-4/+4
__FUNCTION__ is gcc-specific, use __func__ [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-08-18powerpc: Add CMO enabled flag and paging space data to lparcfgRobert Jennings1-0/+5
Add a field in lparcfg output to indicate whether the kernel is running on a dedicated or shared memory lpar. Added fields to show the paging space pool IDs and the CMO page size. Submitted-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-30powerpc: Allow non-hcall return values for lparcfg writesNathan Fontenot1-4/+0
The code to handle writes to /proc/ppc64/lparcfg incorrectly assumes that the return code from the helper routines to update processor or memory entitlement return a hcall return value. It then assumes any non-hcall return value is bad and sets the return code for the write to be -EIO. The update_[mp]pp routines can return values other than a hcall return value. This patch removes the automatic setting of any return code that is not an hcall return value from these routines to -EIO. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-25powerpc/pseries: Remove kmalloc call in handling writes to lparcfgNathan Fontenot1-16/+12
There are only 4 valid name=value pairs for writes to /proc/ppc64/lparcfg. Current code allocates a buffer to copy this information in from the user. Since the longest name=value pair will easily fit into a buffer of 64 characters, simply put the buffer on the stack instead of allocating the buffer. Signed-off-by: Nathan Fotenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-25powerpc/pseries: Verify CMO memory entitlement updates with virtual I/ONathan Fontenot1-0/+10
Verify memory entitlement updates can be handled by vio. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-25powerpc/pseries: Add CMO paging statisticsBrian King1-0/+20
With the addition of Cooperative Memory Overcommitment (CMO) support for IBM Power Systems, two fields have been added to the VPA to report paging statistics. Add support in lparcfg to report them to userspace. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-25powerpc/pseries: Split retrieval of processor entitlement data into a helper ↵Robert Jennings1-35/+46
routine Split the retrieval of processor entitlement data returned in the H_GET_PPP hcall into its own helper routine. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-25powerpc/pseries: Add memory entitlement capabilities to /proc/ppc64/lparcfgNathan Fontenot1-1/+120
Update /proc/ppc64/lparcfg to display Cooperative Memory Overcommitment statistics as reported by the H_GET_MPP hcall. This also updates the lparcfg interface to allow setting memory entitlement and weight. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-25powerpc/pseries: Split processor entitlement retrieval and gathering to ↵Nathan Fotenot1-78/+88
helper routines Split the retrieval and setting of processor entitlement and weight into helper routines. This also removes the printing of the raw values returned from h_get_ppp, the values are already parsed and printed. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-25powerpc/pseries: Remove extraneous error reporting for hcall failures in lparcfgNathan Fontenot1-32/+0
Remove the extraneous error reporting used when a hcall made from lparcfg fails. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-05-14[POWERPC] Fix sparse warnings in arch/powerpc/kernelMichael Ellerman1-3/+3
Make a few things static in lparcfg.c Make init and exit routines static in rtas_flash.c Make things static in rtas_pci.c Make some functions static in rtas.c Make fops static in rtas-proc.c Remove unneeded extern for do_gtod in smp.c Make clocksource_init() static in time.c Make last_tick_len and ticklen_to_xs static in time.c Move the declaration of the pvr per-cpu into smp.h Make kexec_smp_down() and kexec_stack static in machine_kexec_64.c Don't return void in arch_teardown_msi_irqs() in msi.c Move declaration of GregorianDay()into asm/time.h Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-29powerpc: use non-racy method for proc entries creationDenis V. Lunev1-4/+2
Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data be setup before gluing PDE to main tree. Add correct ->owner to proc_fops to fix reading/module unloading race. Signed-off-by: Denis V. Lunev <den@openvz.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-01[POWERPC] Replace remaining __FUNCTION__ occurrencesHarvey Harrison1-6/+6
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-11[POWERPC] lparcfg: Remove useless buffer allocationNathan Lynch1-11/+1
The 'data' member of proc_ppc64_lparcfg is unused, but the lparcfg module's init routine allocates 4K for it. Remove the code which allocates and frees this buffer. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-10-03[POWERPC] ppc64: support CONFIG_DEBUG_PREEMPTHugh Dickins1-1/+1
Add CONFIG_DEBUG_PREEMPT support to ppc64: it was useful for testing get_paca() preemption. Cheat a little, just use debug_smp_processor_id() in the debug version of get_paca(): it contains all the right checks and reporting, though get_paca() doesn't really use smp_processor_id(). Use local_paca for what might have been called __raw_get_paca(). Silence harmless warnings from io.h and lparcfg.c with local_paca - it is okay for iseries_lparcfg_data to be referencing shared_proc with preemption enabled: all cpus should show the same value for shared_proc. Why do other architectures need TRACE_IRQFLAGS_SUPPORT for DEBUG_PREEMPT? I don't know, ppc64 appears to get along fine without it. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-07-19some kmalloc/memset ->kzalloc (tree wide)Yoann Padioleau1-2/+1
Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc). Here is a short excerpt of the semantic patch performing this transformation: @@ type T2; expression x; identifier f,fld; expression E; expression E1,E2; expression e1,e2,e3,y; statement S; @@ x = - kmalloc + kzalloc (E1,E2) ... when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\) - memset((T2)x,0,E1); @@ expression E1,E2,E3; @@ - kzalloc(E1 * E2,E3) + kcalloc(E1,E2,E3) [akpm@linux-foundation.org: get kcalloc args the right way around] Signed-off-by: Yoann Padioleau <padator@wanadoo.fr> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Bryan Wu <bryan.wu@analog.com> Acked-by: Jiri Slaby <jirislaby@gmail.com> Cc: Dave Airlie <airlied@linux.ie> Acked-by: Roland Dreier <rolandd@cisco.com> Cc: Jiri Kosina <jkosina@suse.cz> Acked-by: Dmitry Torokhov <dtor@mail.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org> Acked-by: Pierre Ossman <drzeus-list@drzeus.cx> Cc: Jeff Garzik <jeff@garzik.org> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Greg KH <greg@kroah.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-27[POWERPC] Replace if-then-else with a switch statementWill Schmidt1-21/+22
Convert a compound if-else blob to a switch statement. This better fits the kernel coding style. Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24[POWERPC] Remove old interface find_path_deviceStephen Rothwell1-2/+4
Replaced by of_find_node_by_path. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-12[POWERPC] Rename get_property to of_get_property: arch/powerpcStephen Rothwell1-4/+5
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-02-12[PATCH] mark struct file_operations const 2Arjan van de Ven1-1/+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>
2007-02-08[POWERPC] Fix ppc64's writing to struct file_operationsStephen Rothwell1-4/+7
In preparation for marking file_operations as const. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-01[POWERPC] clean up pseries hcall interfacesAnton Blanchard1-4/+14
Our pseries hcall interfaces are out of control: plpar_hcall_norets plpar_hcall plpar_hcall_8arg_2ret plpar_hcall_4out plpar_hcall_7arg_7ret plpar_hcall_9arg_9ret Create 3 interfaces to cover all cases: plpar_hcall_norets: 7 arguments no returns plpar_hcall: 6 arguments 4 returns plpar_hcall9: 9 arguments 9 returns There are only 2 cases in the kernel that need plpar_hcall9, hopefully we can keep it that way. Pass in a buffer to stash return parameters so we avoid the &dummy1, &dummy2 madness. Signed-off-by: Anton Blanchard <anton@samba.org> -- Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-31[POWERPC] Constify & voidify get_property()Jeremy Kerr1-6/+5
Now that get_property() returns a void *, there's no need to cast its return value. Also, treat the return value as const, so we can constify get_property later. powerpc core changes. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-13[POWERPC] iseries: Make ItExtVpdPanel private to iSeriesMichael Ellerman1-1/+0
No one outside platforms/iseries needs ItExtVpdPanel anymore, so move it in there. It used to be needed by lparcfg, and so was exported, but isn't needed anymore, so unexport it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel1-1/+0
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-29[POWERPC] Make lparcfg.c work when both iseries and pseries are selectedStephen Rothwell1-71/+76
This also consolidates the initial bits of lparcfg_data() and adds the partition number to the iSeries flattened device tree. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-05-19[PATCH] powerpc: udbg_printf() formatting attributejimix@watson.ibm.com1-2/+2
This patch allows the compiler to catch any printf-like mismatches for udbg_printf(). After some brute force building I've only found issues with my own code and lparcfg.c It could break some developers, but IMHO that would be goodness. Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-04-01[PATCH] powerpc/pseries: misc lparcfg fixesWill Schmidt1-4/+5
This fixes several problems with the lparcfg code. In case someone gets a sense of deja-vu, part of this was submitted last Sep, I thought the changes went in, but either got backed out, or just got lost. First, change the local_buffer declaration to be unsigned char *. We had a bad-math problem in a 2.4 tree which was built with a "-fsigned-char" parm. I dont believe we ever build with that parm now-a-days, but to be safe, I'd prefer the declaration be explicit. Second, fix a bad math calculation for splpar_strlen. Third, on the rtas_call for get-system-parameter, pass in RTAS_DATA_BUF_SIZE for the rtas_data_buf size, instead of letting random data determine the size. Until recently, we've had a sufficiently large 'random data' value get passed in, so the function just happens to have worked OK. Now it's getting passed a '0', which causes the rtas_call to return success, but no data shows up in the buffer. (oops!). This was found by the LTC test org. This is in a branch of code that only gets run on SPLPAR systems. Tested on power5 Lpar. Signed-off-by: Will Schmidt <willschm@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-04-01[PATCH] powerpc/pseries: Change H_StudlyCaps to H_SHOUTING_CAPSSegher Boessenkool1-11/+11
Also cleans up some nearby whitespace problems. Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-29[PATCH] for_each_possible_cpu: powerpcKAMEZAWA Hiroyuki1-2/+2
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-02-20[PATCH] powerpc: Fix OOPS in lparcfg on G5Olof Johansson1-2/+4
Fallback gracefully when reading /proc/ppc64/lparcfg when the /rtas device node can't be found. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-13[PATCH] powerpc: Remove lppaca structure from the PACADavid Gibson1-8/+5
At present the lppaca - the structure shared with the iSeries hypervisor and phyp - is contained within the PACA, our own low-level per-cpu structure. This doesn't have to be so, the patch below removes it, making a separate array of lppaca structures. This saves approximately 500*NR_CPUS bytes of image size and kernel memory, because we don't need aligning gap between the Linux and hypervisor portions of every PACA. On the other hand it means an extra level of dereference in many accesses to the lppaca. The patch also gets rid of several places where we assign the paca address to a local variable for no particular reason. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-14powerpc: iSeries build fixesStephen Rothwell1-26/+25
log_plpar_hcall_return is only used on PPC_PSERIES, so move it closer to its users and inside ifdef CONFIG_PPC_PSERIES. remove the last vestiges of systemcfg in iSeries. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-11powerpc: Fix some compile problems with the VDSO stuffPaul Mackerras1-2/+2
We needed the VDSO symbols in the arch/ppc asm-offsets.c, and there were a few usages of _systemcfg still left lying around. Signed-off-by: Paul Mackerras <paulus@samba.org>
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