- 06 May, 2010 6 commits
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Wolfram Sang authored
Drop NO_IRQ as 0 is the preferred way to describe 'no irq' (http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is only used on powerpc, where NO_IRQ is 0 anyhow. Signed-off-by:
Wolfram Sang <w.sang@pengutronix.de> Acked-by:
Grant Likely <grant.likely@secretlab.ca> Cc: Jochen Friedrich <jochen@scram.de> Cc: Ben Dooks <ben-linux@fluff.org> Acked-by:
Jochen Friedrich <jochen@scram.de> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Wolfram Sang authored
Drop NO_IRQ as 0 is the preferred way to describe 'no irq' (http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is only used on powerpc, where NO_IRQ is 0 anyhow. Signed-off-by:
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Martyn Welch authored
Currently the parsing of the device tree in arch/powerpc/include/asm/parport.h assumes that the interrupt provided in the parallel port node is a valid virtual irq. The values for the interrupts provided in the device tree should have meaning in the context of the driver for the specific interrupt controller to which the interrupt is connected and irq_of_parse_and_map() should be used to determine the correct virtual irq. Signed-off-by:
Martyn Welch <martyn.welch@ge.com> Signed-off-by:
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Benjamin Herrenschmidt authored
So we tried to speed things up a bit using flush_hash_pages() directly but that falls over on 603 of course meaning we fail to flush the TLB properly and we may even end up having it corrupt memory randomly by accessing a hash table that doesn't exist. This removes the "optimization" by always going through flush_tlb_page() for now at least. Signed-off-by: -
Michael Neuling authored
Currently we always call start-cpu irrespective of if the CPU is stopped or not. Unfortunatley on POWER7, firmware seems to not like start-cpu being called when a cpu already been started. This was not the case on POWER6 and earlier. This patch checks to see if the CPU is stopped or not via an query-cpu-stopped-state call, and only calls start-cpu on CPUs which are stopped. This fixes a bug with kexec on POWER7 on PHYP where only the primary thread would make it to the second kernel. Reported-by:
Ankita Garg <ankita@linux.vnet.ibm.com> Cc: <stable@kernel.org> Signed-off-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
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Michael Neuling authored
This moves query_cpu_stopped() out of the hotplug cpu code and into smp.c so it can called in other places and renames it to smp_query_cpu_stopped(). It also cleans up the return values by adding some #defines Cc: <stable@kernel.org> Signed-off-by:
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- 05 May, 2010 8 commits
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Stefan Roese authored
By setting "reset_type" to one of the following values, the default software reset mechanism may be overidden. Here the possible values of "reset_type": 1 - PPC4xx core reset 2 - PPC4xx chip reset 3 - PPC4xx system reset (default) This will be used by a new PPC440SPe board port, which needs a "chip reset" instead of the default "system reset" to be asserted. Signed-off-by:
Stefan Roese <sr@denx.de> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by:
Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by:
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Dave Kleikamp authored
A defconfig for the IBM ISS 476 simulator Signed-off-by:
Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by:
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Torez Smith authored
This is a trivial 4xx plaform that uses the new simple bsp from Josh and is handy to use in simulators such as ISS or even Mambo who don't properly implement most of the actual devices in the SoC but really only the core. Signed-off-by:
Torez Smith <lnxtorez@linux.vnet.ibm.com> Signed-off-by:
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Dave Kleikamp authored
476 requires an isync after loading MMU and debug related SPR's. Some of these are in performance-critical paths and may need to be optimized, but initially, we're playing it safe. Signed-off-by:
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Dave Kleikamp authored
The 47x core's MCSR varies from 44x, so it needs it's own machine check handler. Signed-off-by:
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Dave Kleikamp authored
This patch adds the base support for the 476 processor. The code was primarily written by Ben Herrenschmidt and Torez Smith, but I've been maintaining it for a while. The goal is to have a single binary that will run on 44x and 47x, but we still have some details to work out. The biggest is that the L1 cache line size differs on the two platforms, but it's currently a compile-time option. Signed-off-by:
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Dave Kleikamp authored
The 47x platform supports multiple cores and shares code with 44x. Break out code that is common for initializing the primary and secondary cpus into a function which can be called for both. Signed-off-by:
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Torez Smith authored
This patch adds a marker to the exception stack frame to aid in debugging. It's already inserted on other platforms and xmon recognizes it and identifies exception frames when showing stack traces. Signed-off-by:
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- 13 Apr, 2010 1 commit
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Benjamin Herrenschmidt authored
This reverts commit 7545ba6f. It breaks eHEA among other issues
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- 07 Apr, 2010 25 commits
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Mahesh Salgaonkar authored
This patch ports the kprobe-based event tracer to powerpc. This patch is based on x86 port. This brings powerpc on par with x86. Signed-off-by:
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by:
Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by:
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Benjamin Herrenschmidt authored
Adds support for suspend/resume for VIO devices. This is needed for support for HMC initiated hibernation. Signed-off-by:
Brian King <brking@linux.vnet.ibm.com> Signed-off-by:
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Akinobu Mita authored
Replace open-coded rate limiting logic with __ratelimit(). Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by:
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Anton Blanchard authored
The current setting for SECTION_SIZE_BITS is quite small compared to everyone else: arch/powerpc/include/asm/sparsemem.h:#define SECTION_SIZE_BITS 24 arch/sparc/include/asm/sparsemem.h:#define SECTION_SIZE_BITS 30 arch/ia64/include/asm/sparsemem.h:#define SECTION_SIZE_BITS (30) arch/s390/include/asm/sparsemem.h:#define SECTION_SIZE_BITS 28 arch/x86/include/asm/sparsemem.h:# define SECTION_SIZE_BITS 27 And it has proven to be an issue during boot on very large machines. If hotplug memory is enabled, drivers/base/memory.c does this: for (i = 0; i < NR_MEM_SECTIONS; i++) { if (!present_section_nr(i)) continue; err = add_memory_block(0, __nr_to_section(i), MEM_ONLINE, 0, BOOT); if (!ret) ret = err; } Which creates a sysfs directory for every 16MB of memory. As a result I'm seeing up to 30 minutes spent here during boot: c000000000248ee0 .__sysfs_add_one+0x28/0x128 c0000000002492a8 .sysfs_add_one+0x38/0x188 c000000000249c88 .create_dir+0x70/0x138 c000000000249d98 .sysfs_create_dir+0x48/0x78 c00000000032bad8 .kobject_add_internal+0x140/0x308 c00000000032beb4 .kobject_init_and_add+0x4c/0x68 c00000000046c2c0 .sysdev_register+0xa0/0x220 c00000000047b1dc .add_memory_block+0x124/0x1e8 c0000000008d1f28 .memory_dev_init+0xf4/0x168 c0000000008d1b64 .driver_init+0x50/0x64 c000000000890378 .do_basic_setup+0x40/0xd4 I assume there are some O(n^2) issues in sysfs as we add all the memory nodes. Bumping SECTION_SIZE_BITS to 256 MB drops the time to about 10 seconds and results in a much smaller /sys. Signed-off-by:Anton Blanchard <anton@samba.org> Signed-off-by:
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Anton Blanchard authored
We have had issues in the past with ibm,os-term initiating shutdown of a partition. This is confusing to the user, especially if panic_timeout is non zero. The temporary fix was to avoid calling ibm,os-term if a panic_timeout was set and since we set it on every boot we basically never call ibm,os-term. An extended version of ibm,os-term has since been implemented which gives us the behaviour we want: "When the platform supports extended ibm,os-term behavior, the return to the RTAS will always occur unless there is a kernel assisted dump active as initiated by an ibm,configure-kernel-dump call." This patch checks for the ibm,extended-os-term property and calls ibm,os-term if it exists. Signed-off-by:
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Anton Blanchard authored
I noticed /proc/sys/vm/zone_reclaim_mode was 0 on a ppc64 NUMA box. It gets enabled via this: /* * If another node is sufficiently far away then it is better * to reclaim pages in a zone before going off node. */ if (distance > RECLAIM_DISTANCE) zone_reclaim_mode = 1; Since we use the default value of 20 for REMOTE_DISTANCE and 20 for RECLAIM_DISTANCE it never kicks in. The local to remote bandwidth ratios can be quite large on System p machines so it makes sense for us to reclaim clean pagecache locally before going off node. The patch below sets a smaller value for RECLAIM_DISTANCE and thus enables zone reclaim. Signed-off-by: -
Wolfram Sang authored
Fix I2C-drivers which missed setting clientdata to NULL before freeing the structure it points to. Also fix drivers which do this _after_ the structure was freed already. Signed-off-by:
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Julia Lawall authored
Use set_cpus_allowed_ptr rather than set_cpus_allowed. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression E1,E2; @@ - set_cpus_allowed(E1, cpumask_of_cpu(E2)) + set_cpus_allowed_ptr(E1, cpumask_of(E2)) @@ expression E; identifier I; @@ - set_cpus_allowed(E, I) + set_cpus_allowed_ptr(E, &I) // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
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Julia Lawall authored
In some error handling cases the lock is not unlocked. A simplified version of the semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ expression E1; identifier f; @@ f (...) { <+... * spin_lock_irqsave (E1,...); ... when != E1 * return ...; ...+> } // </smpl> Signed-off-by:
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Julia Lawall authored
Add an unlock before exiting the function. A simplified version of the semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ expression E1; identifier f; @@ f (...) { <+... * spin_lock_irq (E1,...); ... when != E1 * return ...; ...+> } // </smpl> Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Julia Lawall authored
kasprintf combines kmalloc and sprintf, and takes care of the size calculation itself. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression a,flag; expression list args; statement S; @@ a = - \(kmalloc\|kzalloc\)(...,flag) + kasprintf(flag,args) <... when != a if (a == NULL || ...) S ...> - sprintf(a,args); // </smpl> Signed-off-by:
Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by:
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Julia Lawall authored
dlpar_free_cc_nodes frees its argument, so dlpar_online_cpu should not be called on the same value. Skip over the call to dlpar_online_cpu by jumping directly to out. A simplified version of the semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression E,E2; @@ dlpar_free_cc_nodes(E) ... ( E = E2 | * E ) // </smpl> Signed-off-by:
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Julia Lawall authored
The conditionals were testing different values, but then all freeing the same one, which could result in a double free. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x,e; identifier f; iterator I; statement S; @@ *kfree(x); ... when != &x when != x = e when != I(x,...) S *x // </smpl> Signed-off-by:
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Jeff Mahoney authored
Commit 0119536c, which added the assembly version of strncmp to powerpc, mentions that it adds two instructions to the version from boot/string.S to allow it to handle len=0. Unfortunately, it doesn't always return 0 when that is the case. The length is passed in r5, but the return value is passed back in r3. In certain cases, this will happen to work. Otherwise it will pass back the address of the first string as the return value. This patch lifts the len <= 0 handling code from memcpy to handle that case. Reported by: Christian_Sellars@symantec.com Signed-off-by:
Jeff Mahoney <jeffm@suse.com> CC: <stable@kernel.org> Signed-off-by:
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d binderman authored
Fix minor nits found by cppcheck [./macintosh/windfarm_pm81.c:760]: (style) Redundant condition. It is safe to deallocate a NULL pointer [./macintosh/windfarm_pm81.c:762]: (style) Redundant condition. It is safe to deallocate a NULL pointer Signed-off-by:
David Binderman <dcb314@hotmail.com> Signed-off-by:
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d binderman authored
Fix minor nits found by cppcheck [./arch/powerpc/platforms/powermac/low_i2c.c:594]: (style) The scope of the variable chans can be reduced [./arch/powerpc/platforms/powermac/low_i2c.c:594]: (style) The scope of the variable i can be reduced [./arch/powerpc/platforms/powermac/low_i2c.c:1260]: (style) Redundant condition. It is safe to deallocate a NULL pointer Signed-off-by:
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d binderman authored
Signed-off-by:
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Joakim Tjernlund authored
This avoids storing these registers in memory. CPU6 errata will still use the old way. Remove some G2 leftover accesses from 2.4 Signed-off-by:
Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by:
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Joakim Tjernlund authored
Only the swap function cares about the ACCESSED bit in the pte. Do not waste cycles updateting ACCESSED when swap is not compiled into the kernel. Signed-off-by:
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Joakim Tjernlund authored
Only modules will cause ITLB Misses as we always pin the first 8MB of kernel memory. Signed-off-by:
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Joakim Tjernlund authored
This removes a couple of insn's from the TLB Miss handlers whithout changing functionality. Signed-off-by:
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Jason Gunthorpe authored
Instead of referencing mem_map directly, use pfn_to_page. Otherwise the kernel crashes when trying to start userspace if ARCH_PFN_OFFSET is non-zero and CONFIG_BOOKE is not defined Signed-off-by:
Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by:
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Vaidyanathan Srinivasan authored
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:
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K.Prasad authored
Data address breakpoint exceptions are currently handled along with page-faults which require interrupts to remain in enabled state. Since exception handling for data breakpoints aren't pre-empt safe, we handle them separately. Signed-off-by:
K.Prasad <prasad@linux.vnet.ibm.com> Signed-off-by:
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Benjamin Herrenschmidt authored
BenH: Added to vio_cmo_dev_attrs as well Provide a modalias entry for VIO devices in sysfs. I believe this was another initrd generation bugfix for anaconda. Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com> Signed-off-by:
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