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* [PATCH] change gen_pool allocator to not touch managed memoryDean Nelson2006-06-23
| | | | | | | | | | | | | | | | | | | | | | | Modify the gen_pool allocator (lib/genalloc.c) to utilize a bitmap scheme instead of the buddy scheme. The purpose of this change is to eliminate the touching of the actual memory being allocated. Since the change modifies the interface, a change to the uncached allocator (arch/ia64/kernel/uncached.c) is also required. Both Andrey Volkov and Jes Sorenson have expressed a desire that the gen_pool allocator not write to the memory being managed. See the following: http://marc.theaimsgroup.com/?l=linux-kernel&m=113518602713125&w=2 http://marc.theaimsgroup.com/?l=linux-kernel&m=113533568827916&w=2 Signed-off-by: Dean Nelson <dcn@sgi.com> Cc: Andrey Volkov <avolkov@varma-el.com> Acked-by: Jes Sorensen <jes@trained-monkey.org> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm: introduce remap_vmalloc_range()Nick Piggin2006-06-23
| | | | | | | | | Add remap_vmalloc_range, vmalloc_user, and vmalloc_32_user so that drivers can have a nice interface for remapping vmalloc memory. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Unify pxm_to_node() and node_to_pxm()Yasunori Goto2006-06-23
| | | | | | | | | | | | | Consolidate the various arch-specific implementations of pxm_to_node() and node_to_pxm() into a single generic version. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] tightening hugetlb strict accountingChen, Kenneth W2006-06-23
| | | | | | | | | | | | | | | | | | | | | Current hugetlb strict accounting for shared mapping always assume mapping starts at zero file offset and reserves pages between zero and size of the file. This assumption often reserves (or lock down) a lot more pages then necessary if application maps at none zero file offset. libhugetlbfs is one example that requires proper reservation on shared mapping starts at none zero offset. This patch extends the reservation and hugetlb strict accounting to support any arbitrary pair of (offset, len), resulting a much more robust and accurate scheme. More importantly, it won't lock down any hugetlb pages outside file mapping. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Acked-by: Adam Litke <agl@us.ibm.com> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reserve space for swap labelAndreas Dilger2006-06-23
| | | | | | | | | | | | | | | | | Reserve space in the swap disk header for a LABEL and UUID to be specified. This has been possible with util-linux-2.12b (via e2fsprogs 1.36 libblkid), and is used by at least FC3 and later. The kernel doesn't really care about this, but the space shouldn't accidentally be used by something else either. Also make the on-disk structures be fixed-size types, instead of "int", though I don't know of any architecture in use where an "int" isn't the same size as a "__u32" (all current kernel arches have it as "unsigned int"). Signed-off-by: Andreas Dilger <adilger@shaw.ca> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] support for panic at OOMKAMEZAWA Hiroyuki2006-06-23
| | | | | | | | | | | | | | | | | This patch adds panic_on_oom sysctl under sys.vm. When sysctl vm.panic_on_oom = 1, the kernel panics intead of killing rogue processes. And if vm.panic_on_oom is 0 the kernel will do oom_kill() in the same way as it does today. Of course, the default value is 0 and only root can modifies it. In general, oom_killer works well and kill rogue processes. So the whole system can survive. But there are environments where panic is preferable rather than kill some processes. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] squash duplicate page_to_pfn and pfn_to_pageAndy Whitcroft2006-06-23
| | | | | | | | | | | | We have architectures where the size of page_to_pfn and pfn_to_page are significant enough to overall image size that they wish to push them out of line. However, in the process we have grown a second copy of the implementation of each of these routines for each memory model. Share the implmentation exposing it either inline or out-of-line as required. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] wait_table and zonelist initializing for memory hotadd: add return ↵Yasunori Goto2006-06-23
| | | | | | | | | | | | | | | | code for init_current_empty_zone When add_zone() is called against empty zone (not populated zone), we have to initialize the zone which didn't initialize at boot time. But, init_currently_empty_zone() may fail due to allocation of wait table. So, this patch is to catch its error code. Changes against wait_table is in the next patch. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] wait_table and zonelist initializing for memory hotadd: change to ↵Yasunori Goto2006-06-23
| | | | | | | | | | | | | meminit for build_zonelist Change definitions of some functions and data from __init to __meminit. These functions and data can be used after bootup by this patch to be used for hot-add codes. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] wait_table and zonelist initializing for memory hotadd: change name ↵Yasunori Goto2006-06-23
| | | | | | | | | | of wait_table_size() This is just to rename from wait_table_size() to wait_table_hash_nr_entries(). Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] PG_uncached is ia64 onlyAndrew Morton2006-06-23
| | | | | | | | | | | | | | As Nick points out, only ia64 uses PG_uncached. So we can push it up into the higher bits of the lower half of page->flags and make room for another flag on 32-bit machines. Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Jesse Barnes <jbarnes@sgi.com> Cc: Jes Sorensen <jes@trained-monkey.org> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] zone handle unaligned zone boundariesAndy Whitcroft2006-06-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The buddy allocator has a requirement that boundaries between contigious zones occur aligned with the the MAX_ORDER ranges. Where they do not we will incorrectly merge pages cross zone boundaries. This can lead to pages from the wrong zone being handed out. Originally the buddy allocator would check that buddies were in the same zone by referencing the zone start and end page frame numbers. This was removed as it became very expensive and the buddy allocator already made the assumption that zones boundaries were aligned. It is clear that not all configurations and architectures are honouring this alignment requirement. Therefore it seems safest to reintroduce support for non-aligned zone boundaries. This patch introduces a new check when considering a page a buddy it compares the zone_table index for the two pages and refuses to merge the pages where they do not match. The zone_table index is unique for each node/zone combination when FLATMEM/DISCONTIGMEM is enabled and for each section/zone combination when SPARSEMEM is enabled (a SPARSEMEM section is at least a MAX_ORDER size). Signed-off-by: Andy Whitcroft <apw@shadowen.org> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] VFS: Permit filesystem to perform statfs with a known root dentryDavid Howells2006-06-23
| | | | | | | | | | | | | | | | | | | | | Give the statfs superblock operation a dentry pointer rather than a superblock pointer. This complements the get_sb() patch. That reduced the significance of sb->s_root, allowing NFS to place a fake root there. However, NFS does require a dentry to use as a target for the statfs operation. This permits the root in the vfsmount to be used instead. linux/mount.h has been added where necessary to make allyesconfig build successfully. Interest has also been expressed for use with the FUSE and XFS filesystems. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Nathan Scott <nathans@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] VFS: Permit filesystem to override root dentry on mountDavid Howells2006-06-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extend the get_sb() filesystem operation to take an extra argument that permits the VFS to pass in the target vfsmount that defines the mountpoint. The filesystem is then required to manually set the superblock and root dentry pointers. For most filesystems, this should be done with simple_set_mnt() which will set the superblock pointer and then set the root dentry to the superblock's s_root (as per the old default behaviour). The get_sb() op now returns an integer as there's now no need to return the superblock pointer. This patch permits a superblock to be implicitly shared amongst several mount points, such as can be done with NFS to avoid potential inode aliasing. In such a case, simple_set_mnt() would not be called, and instead the mnt_root and mnt_sb would be set directly. The patch also makes the following changes: (*) the get_sb_*() convenience functions in the core kernel now take a vfsmount pointer argument and return an integer, so most filesystems have to change very little. (*) If one of the convenience function is not used, then get_sb() should normally call simple_set_mnt() to instantiate the vfsmount. This will always return 0, and so can be tail-called from get_sb(). (*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the dcache upon superblock destruction rather than shrink_dcache_anon(). This is required because the superblock may now have multiple trees that aren't actually bound to s_root, but that still need to be cleaned up. The currently called functions assume that the whole tree is rooted at s_root, and that anonymous dentries are not the roots of trees which results in dentries being left unculled. However, with the way NFS superblock sharing are currently set to be implemented, these assumptions are violated: the root of the filesystem is simply a dummy dentry and inode (the real inode for '/' may well be inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries with child trees. [*] Anonymous until discovered from another tree. (*) The documentation has been adjusted, including the additional bit of changing ext2_* into foo_* in the documentation. [akpm@osdl.org: convert ipath_fs, do other stuff] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Nathan Scott <nathans@sgi.com> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-06-23
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (21 commits) [ARM] 3629/1: S3C24XX: fix missing bracket in regs-dsc.h [ARM] 3537/1: Rework DMA-bounce locking for finer granularity [ARM] 3601/1: i.MX/MX1 DMA error handling for signaled channels only [ARM] 3597/1: ixp4xx/nslu2: Board support for new LED subsystem [ARM] 3595/1: ixp4xx/nas100d: Board support for new LED subsystem [ARM] 3626/1: ARM EABI: fix syscall restarting [ARM] 3628/1: S3C24XX: add get_rate call to struct clk [ARM] 3627/1: S3C24XX: split s3c2410 clocks from core clocks [ARM] 3613/1: S3C2410: Add sysdev and sysclass [ARM] 3624/1: Report true modem control line states [ARM] 3620/2: ixp23xx: add uengine loader support [ARM] 3618/1: add defconfig for logicpd pxa270 card engine [ARM] 3617/1: ep93xx: fix slightly incorrect timer tick rate [ARM] 3616/1: fix timer handler wrap logic for a number of platforms [ARM] 3615/1: ixp23xx: use platform devices for physmap flash [ARM] 3614/1: ep93xx: use platform devices for physmap flash [ARM] 3621/1: fix compilation breakage for pnx4008 [ARM] 3623/1: pnx4008: move GPIO-related defines to gpio.h [ARM] 3622/1: pnx4008: remove clk_use/clk_unuse [ARM] Enable VFP to be built when non-VFP capable CPUs are selected ...
| * [ARM] 3629/1: S3C24XX: fix missing bracket in regs-dsc.hBen Dooks2006-06-22
| | | | | | | | | | | | | | | | | | Patch from Ben Dooks Fix missing bracket in include/asm-arm/arch-s3c2410/regs-dsc.h Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 3601/1: i.MX/MX1 DMA error handling for signaled channels onlyPavel Pisa2006-06-22
| | | | | | | | | | | | | | | | | | | | | | | | Patch from Pavel Pisa There has been bug, that dma_err_handler() touches even channels not signaling error condition. Problem noticed by Andrea Paterniani. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 3620/2: ixp23xx: add uengine loader supportLennert Buytenhek2006-06-22
| | | | | | | | | | | | | | | | | | | | Patch from Lennert Buytenhek This patch allows the ixp2000 uengine loader that is already in the tree to also be used on the ixp23xx. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 3621/1: fix compilation breakage for pnx4008Vitaly Wool2006-06-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Vitaly Wool pnx4008_defconfig fails to build: include/asm/hardware/debug-8250.S: Assembler messages: include/asm/hardware/debug-8250.S:12: Error: Macro with this name was already defined. This is due to senduart macro erroneously defined in include/asm-arm/arch-pnx4008/debug-macro.S. This patch removes it from that file. Signed-off-by: Vitaly Wool <vwool@ru.mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 3623/1: pnx4008: move GPIO-related defines to gpio.hVitaly Wool2006-06-22
| | | | | | | | | | | | | | | | | | | | Patch from Vitaly Wool This patch moves GPIO-related defines and static inline funcs from include/asm-arm/arch-pnx4008/pm.h to include/asm-arm/arch-pnx4008/gpio.h. Also, some more GPIO-related defines are added to include/asm-arm/arch-pnx4008/gpio.h as they are needed for the USB host driver (coming soon...) Signed-off-by: Vitaly Wool <vwool@ru.mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Add thread_notify infrastructureRussell King2006-06-22
| | | | | | | | | | | | | | | | | | | | | | | | | | Some machine classes need to allow VFP support to be built into the kernel, but still allow the kernel to run even though VFP isn't present. Unfortunately, the kernel hard-codes VFP instructions into the thread switch, which prevents this being run-time selectable. Solve this by introducing a notifier which things such as VFP can hook into to be informed of events which affect the VFP subsystem (eg, creation and destruction of threads, switches between threads.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | Merge branch 'upstream-linus' of ↵Linus Torvalds2006-06-23
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (33 commits) [PATCH] myri10ge - drop workaround pci_save_state() disabling MSI [PATCH] myri10ge - drop workaround for the missing AER ext cap on nVidia CK804 via-velocity: the link is not correctly detected when the device starts [PATCH] add b44 to maintainers [PATCH] WAN: ioremap() failure checks in drivers [PATCH] WAN: register_hdlc_device() doesn't need dev_alloc_name() [PATCH] skb_padto()-area fixes in 8390, wavelan [PATCH] make drivers/net/forcedeth.c:nv_update_pause() static [PATCH] network driver for Hilscher netx [PATCH] Dereference in tokenring/olympic.c [PATCH] Array overrun in drivers/net/wireless/wavelan.c [PATCH] Remove useless check in drivers/net/pcmcia/xirc2ps_cs.c [PATCH] 8139cp: add ethtool eeprom support [PATCH] 8139cp: fix eeprom read command length [PATCH] b44: update b44 Kconfig entry [PATCH] b44: update version to 1.01 [PATCH] b44: add wol for old nic [PATCH] b44: add parameter [PATCH] b44: add wol [PATCH] b44: fix manual speed/duplex/autoneg settings ...
| * | [PATCH] WAN: register_hdlc_device() doesn't need dev_alloc_name()Krzysztof Halasa2006-06-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | David Boggs noticed that register_hdlc_device() no longer needs to call dev_alloc_name() as it's called by register_netdev(). register_hdlc_device() is currently equivalent to register_netdev(). hdlc_setup() is now EXPORTed as per David's request. Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | [PATCH] network driver for Hilscher netxSascha Hauer2006-06-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a patch for the Hilscher netx builtin ethernet ports. The netx board support was merged into 2.6.17-git2. The netx is a arm926 based SoC. Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> -- drivers/net/Kconfig | 11 drivers/net/Makefile | 1 drivers/net/netx-eth.c | 516 ++++++++++++++++++++++++++++++++++++++++ include/asm-arm/arch-netx/eth.h | 27 ++ 4 files changed, 555 insertions(+) Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | Merge branch 'master' into upstreamJeff Garzik2006-06-22
| |\ \
| * \ \ Merge branch 'upstream' of ↵Jeff Garzik2006-06-20
| |\ \ \ | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into upstream
| | * | | [PATCH] wireless: Changes to ieee80211.h for user space regulatory daemonLarry Finger2006-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Attached are two small patches for include/net/ieee80211.h to prepare for later submission of code to implement a user-space daemon that supplies 802.11 regulatory information. The first change adds a bit indicating that 802.11h rules are to be applied to a channel. As discussed earlier in this list, a single bit is unlikely to be sufficient; however, at this time I have been unable to find any regulations implementing differences between 802.11a and 802.11h other than DFS, radar detection and passive scanning. A single bit is thus sufficient to convey to the driver that these rules should be obeyed. The second change adds comments to the freq and max_power fields of struct ieee80211_channel to indicate the units that are used. Signed-Off-By: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | | Merge branch 'from-linus' into upstreamJohn W. Linville2006-06-13
| | |\ \ \
* | | \ \ \ Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds2006-06-23
|\ \ \ \ \ \ | |_|_|_|/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (139 commits) [POWERPC] re-enable OProfile for iSeries, using timer interrupt [POWERPC] support ibm,extended-*-frequency properties [POWERPC] Extra sanity check in EEH code [POWERPC] Dont look for class-code in pci children [POWERPC] Fix mdelay badness on shared processor partitions [POWERPC] disable floating point exceptions for init [POWERPC] Unify ppc syscall tables [POWERPC] mpic: add support for serial mode interrupts [POWERPC] pseries: Print PCI slot location code on failure [POWERPC] spufs: one more fix for 64k pages [POWERPC] spufs: fail spu_create with invalid flags [POWERPC] spufs: clear class2 interrupt status before wakeup [POWERPC] spufs: fix Makefile for "make clean" [POWERPC] spufs: remove stop_code from struct spu [POWERPC] spufs: fix spu irq affinity setting [POWERPC] spufs: further abstract priv1 register access [POWERPC] spufs: split the Cell BE support into generic and platform dependant parts [POWERPC] spufs: dont try to access SPE channel 1 count [POWERPC] spufs: use kzalloc in create_spu [POWERPC] spufs: fix initial state of wbox file ... Manually resolved conflicts in: drivers/net/phy/Makefile include/asm-powerpc/spu.h
| * | | | | [POWERPC] Fix mdelay badness on shared processor partitionsAnton Blanchard2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On partitioned PPC64 systems where a partition is given 1/10 of a processor, we have seen mdelay() delaying for 10 times longer than it should. The reason is that the generic mdelay(n) does n delays of 1 millisecond each. However, with 1/10 of a processor, we only get a one-millisecond timeslice every 10ms. Thus each 1 millisecond delay loop ends up taking 10ms elapsed time. The solution is just to use the PPC64 udelay function, which uses the timebase to ensure that the delay is based on elapsed time rather than how much processing time the partition has been given. (Yes, the generic mdelay uses the PPC64 udelay, but the problem is that the start time gets reset every millisecond, and each time it gets reset we lose another 9ms.) Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Andrew Morton <akpm@osdl.org>
| * | | | | [POWERPC] disable floating point exceptions for initArnd Bergmann2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Floating point exceptions should not be enabled by default, as this setting impacts the performance on some CPUs, in particular the Cell BE. Since the bits are inherited from parent processes, the place to change the default is the thread struct used for init. glibc sets this up correctly per thread in its fesetenv function, so user space should not be impacted by this setting. None of the other common libc implementations (uClibc, dietlibc, newlib, klibc) has support for fp exceptions, so they are unlikely to be hit by this either. There is a small risk that somebody wrote their own application that manually sets the fpscr bits instead of calling fesetenv, without changing the MSR bits as well. Those programs will break with this change. It probably makes sense to change glibc in the future to be more clever about FE bits, so that when running on a CPU where this is expensive, it disables exceptions ASAP, while it keeps them enabled on CPUs where running with exceptions on is cheaper than changing the state often. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] Unify ppc syscall tablesAndreas Schwab2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid duplication of the syscall table for the cell platform. Based on an idea from David Woodhouse. Signed-off-by: Andreas Schwab <schwab@suse.de> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] mpic: add support for serial mode interruptsMark A. Greer2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Tue, Jun 20, 2006 at 02:01:26PM +1000, Benjamin Herrenschmidt wrote: > On Mon, 2006-06-19 at 13:08 -0700, Mark A. Greer wrote: > > MPC10x-style interrupt controllers have a serial mode that allows > > several interrupts to be clocked in through one INT signal. > > > > This patch adds the software support for that mode. > > You hard code the clock ratio... why not add a separate call to be > called after mpic_init, > something like mpic_set_serial_int(int mpic, int enable, int > clock_ratio) ? How's this? -- MPC10x-style interrupt controllers have a serial mode that allows several interrupts to be clocked in through one INT signal. This patch adds the software support for that mode. Signed-off-by: Mark A. Greer <mgreer@mvista.com> -- arch/powerpc/sysdev/mpic.c | 20 ++++++++++++++++++++ include/asm-powerpc/mpic.h | 10 ++++++++++ 2 files changed, 30 insertions(+) -- Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] spufs: one more fix for 64k pagesarnd@arndb.de2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The SPU context save/restore code is currently built for a 4k page size and we provide a _shipped version of it since most people don't have the spu toolchain that is needed to rebuild that code. This patch hardcodes the data structures to a 64k page alignment, which also guarantees 4k alignment but unfortunately wastes 60k of memory per SPU context that is created in the running system. We will follow up on this with another patch to reduce that overhead or maybe redo the context save/restore logic to do this part entirely different, but for now it should make experimental systems work with either page size. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] spufs: remove stop_code from struct spuMasato Noguchi2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch remove 'stop_code' -- discarded member of struct spu. It is written at initialize and interrupt, but never read in current implementation. Signed-off-by: Masato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] spufs: fix spu irq affinity settingGeoff Levand2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This changes the hypervisor abstraction of setting cpu affinity to a higher level to avoid platform dependent interrupt controller routines. I replaced spu_priv1_ops:spu_int_route_set() with a new routine spu_priv1_ops:spu_cpu_affinity_set(). As a by-product, this change eliminated what looked like an existing bug in the set affinity code where spu_int_route_set() mistakenly called int_stat_get(). Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] spufs: further abstract priv1 register accessGeoff Levand2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To support muti-platform binaries the spu hypervisor accessor routines must have runtime binding. I removed the existing statically linked routines in spu.h and spu_priv1_mmio.c and created new accessor routines in spu_priv1.h that operate indirectly through an ops struct spu_priv1_ops. spu_priv1_mmio.c contains the instance of the accessor routines for running on raw hardware. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] cell: register SPUs as sysdevsJeremy Kerr2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SPUs are registered as system devices, exposing attributes through sysfs. Since the sysdev includes a kref, we can remove the one in struct spu (it isn't used at the moment anyway). Currently only the interrupt source and numa node attributes are added. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] cell: add RAS supportBenjamin Herrenschmidt2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a first version of support for the Cell BE "Reliability, Availability and Serviceability" features. It doesn't yet handle some of the RAS interrupts (the ones described in iic_is/iic_irr), I'm still working on a proper way to expose these. They are essentially a cascaded controller by themselves (sic !) though I may just handle them locally to the iic driver. I need also to sync with David Erb on the way he hooked in the performance monitor interrupt. So that's all for 2.6.17 and I'll do more work on that with my rework of the powerpc interrupt layer that I'm hacking on at the moment. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] Add 8641 Register space and IRQ definitions.Jon Loeliger2006-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Jeff Brown <Jeff.Brown@freescale.com> Signed-off-by: Xianghua Xiao <x.xiao@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] check firmware state before suspendingDave C Boutcher2006-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the kernel blindly halts all the processors and calls the ibm,suspend-me rtas call. If the firmware is not in the correct state, we then re-start all the processors and return. It is much smarter to first check the firmware state, and only if it is waiting, call the ibm,suspend-me call. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] Fix HV bit handling on non partitioned machinesAnton Blanchard2006-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On non partitioned machines we currently set the HV bit in kernel space only. It turns out we are supposed to maintain the HV bit in both user and kernel space. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] node local IOMMU tablesAnton Blanchard2006-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allocate IOMMU tables local to the relevant node. Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] pcibus_to_node fixesAnton Blanchard2006-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of_node_to_nid returns -1 if the associativity cannot be found. This means pcibus_to_cpumask has to be careful not to pass a negative index into node_to_cpumask. Since pcibus_to_node could be used a lot, and of_node_to_nid is slow (it walks a list doing strcmps), lets also cache the node in the pci_controller struct. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] Remove stale 64bit on 32bit kernel codeAnton Blanchard2006-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove some stale POWER3/POWER4/970 on 32bit kernel support. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] 64bit FPSCR supportAnton Blanchard2006-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Forthcoming machines will extend the FPSCR to 64 bits. We already had a 64-bit save area for the FPSCR, but we need to use a new form of the mtfsf instruction. Fortunately this new form is decoded as an ordinary mtfsf by existing 64-bit processors. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] MSI abstractionJake Moilanen2006-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of trying to make PPC64 MSI fit in a Intel-centric MSI layer, a simple short-term solution is to hook the pci_{en/dis}able_msi() calls and make a machdep call. The rest of the MSI functions are superfluous for what is needed at this time. Many of which can have machdep calls added as needed. Ben and Michael Ellerman are looking into rewrite the MSI layer to be more generic. However, in the meantime this works as a interim solution. Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | powerpc: Use 64k pages without needing cache-inhibited large pagesPaul Mackerras2006-06-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some POWER5+ machines can do 64k hardware pages for normal memory but not for cache-inhibited pages. This patch lets us use 64k hardware pages for most user processes on such machines (assuming the kernel has been configured with CONFIG_PPC_64K_PAGES=y). User processes start out using 64k pages and get switched to 4k pages if they use any non-cacheable mappings. With this, we use 64k pages for the vmalloc region and 4k pages for the imalloc region. If anything creates a non-cacheable mapping in the vmalloc region, the vmalloc region will get switched to 4k pages. I don't know of any driver other than the DRM that would do this, though, and these machines don't have AGP. When a region gets switched from 64k pages to 4k pages, we do not have to clear out all the 64k HPTEs from the hash table immediately. We use the _PAGE_COMBO bit in the Linux PTE to indicate whether the page was hashed in as a 64k page or a set of 4k pages. If hash_page is trying to insert a 4k page for a Linux PTE and it sees that it has already been inserted as a 64k page, it first invalidates the 64k HPTE before inserting the 4k HPTE. The hash invalidation routines also use the _PAGE_COMBO bit, to determine whether to look for a 64k HPTE or a set of 4k HPTEs to remove. With those two changes, we can tolerate a mix of 4k and 64k HPTEs in the hash table, and they will all get removed when the address space is torn down. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | powerpc: Remove unused paca->pgdir fieldPaul Mackerras2006-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pgdir field in the paca was a leftover from the dynamic VSIDs patch, and is not used in the current kernel code. This removes it. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | Merge branch 'merge'Paul Mackerras2006-06-12
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