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* [PATCH] x86_64: Fix dump_trace()OGAWA Hirofumi2007-01-031-1/+1
| | | | | | | | If caller passed the tsk, we should use it to validate a stack ptr. Otherwise, sysrq-t and other debugging stuff doesn't work. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2007-01-028-7/+59
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 4081/1: Add definition for TI Sync Serial Protocol [ARM] 4080/1: Fix for the SSCR0_SlotsPerFrm macro [ARM] Fix VFP initialisation issue for SMP systems [ARM] 4078/1: Fix ARM copypage cache coherency problems [ARM] 4077/1: iop13xx: fix __io() macro [ARM] 4074/1: Flat loader stack alignment [ARM] 4073/1: Prevent s3c24xx drivers from including asm/arch/hardware.h and asm/arch/irqs.h [ARM] 4071/1: S3C24XX: Documentation update [ARM] 4066/1: correct a comment about PXA's sched_clock range [ARM] 4065/1: S3C24XX: dma printk fixes [ARM] 4064/1: make pxa_get_cycles() static [ARM] 4063/1: ep93xx: fix IRQ_EP93XX_GPIO?MUX numbering
| * [ARM] Fix VFP initialisation issue for SMP systemsRussell King2007-01-021-0/+15
| | | | | | | | | | | | | | | | When we install the handlers for context switching, we must enable VFP on all CPU cores, otherwise undefined (and random) effects occur. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 4078/1: Fix ARM copypage cache coherency problemsRichard Purdie2006-12-303-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | If PG_dcache_dirty is set for a page, we need to flush the source page before performing any copypage operation using a different virtual address. This fixes the copypage implementations for XScale, StrongARM and ARMv6. This patch fixes segmentation faults seen in the dynamic linker under the usage patterns in glibc 2.4/2.5. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 4077/1: iop13xx: fix __io() macroDan Williams2006-12-301-0/+19
| | | | | | | | | | | | | | | | | | | | Since iop13xx defines the PCI I/O spaces with physical resource addresses the __io macro needs to perform the physical to virtual conversion. I incorrectly assumed that this would be handled by ioremap, but drivers (like e1000) directly dereference the address returned from __io. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 4066/1: correct a comment about PXA's sched_clock rangeNicolas Pitre2006-12-301-1/+3
| | | | | | | | | | Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 4065/1: S3C24XX: dma printk fixesArnaud Patard2006-12-301-2/+2
| | | | | | | | | | | | | | | | | | | | The commit 505788cccbb96cd496b646594c8a5fcdc26bc2d9 in linus kernel tree introduced some printks (for debugging ?) which are flooding the logs on my h1940. This patch replace them with pr_debug calls. Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 4064/1: make pxa_get_cycles() staticNicolas Pitre2006-12-301-4/+4
| | | | | | | | | | | | | | ... and fix a comment as well. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [PATCH] Fix insta-reboot with "i386: Relocatable kernel support"Segher Boessenkool2007-01-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 968de4f02621db35b8ae5239c8cfc6664fb872d8 ("i386: Relocatable kernel support") caused problems for people with old binutils versions that didn't mark ".text.*" sections automatically allocated. So we should use .section command to specifically mark .text.head section as AX (allocatable and executable) to solve the problem. This should be unnecessary with binutils 2.15 and later, which is already three years old, but it doesn't hurt supporting older toolchains where possible. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Acked-by: Jean Delvare <khali@linux-fr.org> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Revert "[PATCH] x86_64: fix boot hang caused by ↵Linus Torvalds2007-01-011-2/+3
| | | | | | | | | | | | | | | | | | | | CALGARY_IOMMU_ENABLED_BY_DEFAULT" This reverts commit a9622f6219ce58faba1417743bf3078501eb3434. Now that the Calgary code apparently detects itself properly, it's not needed any more. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [SPARC64]: Handle ISA devices with no 'regs' property.David S. Miller2006-12-311-12/+8
| | | | | | | | | | | | | | | | | | | | And this points out that the return value from isa_dev_get_resource() and the 'pregs' arg to isa_dev_get_irq() are totally unused. Based upon a patch from Richard Mortimer <richm@oldelvet.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* | [SPARC64]: Update defconfig.David S. Miller2006-12-311-8/+26
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | [SPARC64]: Fix of_iounmap() region release.David S. Miller2006-12-312-3/+6
| | | | | | | | | | | | | | | | | | | | We need to pass in the resource otherwise we cannot release the region properly. We must know whether it is an I/O or MEM resource. Spotted by Eric Brower. Signed-off-by: David S. Miller <davem@davemloft.net>
* | [SPARC64]: Fix "mem=xxx" handling.David S. Miller2006-12-311-23/+124
| | | | | | | | | | | | | | | | We were not being careful enough. When we trim the physical memory areas, we have to make sure we don't remove the kernel image or initial ramdisk image ranges. Signed-off-by: David S. Miller <davem@davemloft.net>
* | [PATCH] sparc32: add offset in pci_map_sg()Jan Andersson2006-12-301-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | Add sg->offset to sg->dvma_address in pci_map_sg() on sparc32. Without the offset, transfers to buffers that do not begin on a page boundary will not work as expected. Signed-off-by: Jan Andersson <jan.andersson@ieee.org> Cc: "David S. Miller" <davem@davemloft.net> 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] ARM: OMAP: fix missing header on apollon boardKyungmin Park2006-12-301-0/+1
| | | | | | | | | | | | | | | | | | | | Fix apollon board compiler error Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] ARM: OMAP: fix GPMC compiler errorsKyungmin Park2006-12-301-13/+8
| | | | | | | | | | | | | | | | | | | | Fix GPMC compiler errors on OMAP2 Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] make fn_keys work again on power/macbooksSoeren Sonnenburg2006-12-303-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The apple fn keys don't work anymore with 2.6.20-rc1. The reason is that USB_HID_POWERBOOK appears in several files although USB_HIDINPUT_POWERBOOK is the thing to be used. The patch fixes this. Cc: Greg KH <greg@kroah.com> Cc: Dmitry Torokhov <dtor@mail.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] Add .gitignore file for relocs in arch/i386Thomas Meyer2006-12-301-0/+1
|/ | | | | | | | | | | Due to the changes to make the kernel relocateable a new file is created during the build process. [jirislaby@gmail.com: The .gitigonre was intended to be in arch/ subtree] Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] arch/i386/pci/mmconfig.c tlb flush fixOGAWA Hirofumi2006-12-231-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We use the fixmap for accessing pci config space in pci_mmcfg_read/write(). The problem is in pci_exp_set_dev_base(). It is caching a last accessed address to avoid calling set_fixmap_nocache() whenever pci_mmcfg_read/write() is used. static inline void pci_exp_set_dev_base(int bus, int devfn) { u32 dev_base = base | (bus << 20) | (devfn << 12); if (dev_base != mmcfg_last_accessed_device) { mmcfg_last_accessed_device = dev_base; set_fixmap_nocache(FIX_PCIE_MCFG, dev_base); } } cpu0 cpu1 --------------------------------------------------------------------------- pci_mmcfg_read("device-A") pci_exp_set_dev_base() set_fixmap_nocache() pci_mmcfg_read("device-B") pci_exp_set_dev_base() set_fixmap_nocache() pci_mmcfg_read("device-B") pci_exp_set_dev_base() /* doesn't flush tlb */ But if cpus accessed the above order, the second pci_mmcfg_read() on cpu0 doesn't flush the TLB, because "mmcfg_last_accessed_device" is device-B. So, second pci_mmcfg_read() on cpu0 accesses a device-A via a previous TLB cache. This problem became the cause of several strange behavior. This patches fixes this situation by adds "mmcfg_last_accessed_cpu" check. [ Alternatively, we could make a per-cpu mapping area or something. Not that it's probably worth it, but if we wanted to avoid all locking and instead just disable preemption, that would be the way to go. --Linus ] Signed-off-by: OGAWA Hirofumi <hogawa@miraclelinux.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'release' of ↵Linus Torvalds2006-12-222-3/+23
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (68 commits) ACPI: replace kmalloc+memset with kzalloc ACPI: Add support for acpi_load_table/acpi_unload_table_id fbdev: update after backlight argument change ACPI: video: Add dev argument for backlight_device_register ACPI: Implement acpi_video_get_next_level() ACPI: Kconfig - depend on PM rather than selecting it ACPI: fix NULL check in drivers/acpi/osl.c ACPI: make drivers/acpi/ec.c:ec_ecdt static ACPI: prevent processor module from loading on failures ACPI: fix single linked list manipulation ACPI: ibm_acpi: allow clean removal ACPI: fix git automerge failure ACPI: ibm_acpi: respond to workqueue update ACPI: dock: add uevent to indicate change in device status ACPI: ec: Lindent once again ACPI: ec: Change #define to enums there possible. ACPI: ec: Style changes. ACPI: ec: Acquire Global Lock under EC mutex. ACPI: ec: Drop udelay() from poll mode. Loop by reading status field instead. ACPI: ec: Rename gpe_bit to gpe ...
| * ACPI: replace kmalloc+memset with kzallocBurman Yan2006-12-201-3/+1
| | | | | | | | | | Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com>
| * merge linus into test branchLen Brown2006-12-2025-661/+693
| |\
| * | ACPI: fix git automerge failureLen Brown2006-12-161-1/+0
| | | | | | | | | | | | Signed-off-by: Len Brown <len.brown@intel.com>
| * | Pull trivial into test branchLen Brown2006-12-162-0/+23
| |\ \ | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/acpi/ec.c
| | * | ACPI: acpi-cpufreq: remove unused data when !CONFIG_SMPAndrew Morton2006-10-211-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | acpi-cpufreq.c, speedstep-centrino.c: warning: 'sw_any_bug_dmi_table' defined but not used Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com>
| | * | ACPI: uninline ACPI global locking functionsAndrew Morton2006-10-211-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Fixes a build problem with CONFIG_M386=y (include file dependencies get messy). - Share the implementation between x86 and x86_64 - These are too big to inline anyway. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com>
* | | | [PATCH] sched: fix bad missed wakeups in the i386, x86_64, ia64, ACPI and ↵Ingo Molnar2006-12-224-5/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | APM idle code Fernando Lopez-Lezcano reported frequent scheduling latencies and audio xruns starting at the 2.6.18-rt kernel, and those problems persisted all until current -rt kernels. The latencies were serious and unjustified by system load, often in the milliseconds range. After a patient and heroic multi-month effort of Fernando, where he tested dozens of kernels, tried various configs, boot options, test-patches of mine and provided latency traces of those incidents, the following 'smoking gun' trace was captured by him: _------=> CPU# / _-----=> irqs-off | / _----=> need-resched || / _---=> hardirq/softirq ||| / _--=> preempt-depth |||| / ||||| delay cmd pid ||||| time | caller \ / ||||| \ | / IRQ_19-1479 1D..1 0us : __trace_start_sched_wakeup (try_to_wake_up) IRQ_19-1479 1D..1 0us : __trace_start_sched_wakeup <<...>-5856> (37 0) IRQ_19-1479 1D..1 0us : __trace_start_sched_wakeup (c01262ba 0 0) IRQ_19-1479 1D..1 0us : resched_task (try_to_wake_up) IRQ_19-1479 1D..1 0us : __spin_unlock_irqrestore (try_to_wake_up) ... <idle>-0 1...1 11us!: default_idle (cpu_idle) ... <idle>-0 0Dn.1 602us : smp_apic_timer_interrupt (c0103baf 1 0) ... <...>-5856 0D..2 618us : __switch_to (__schedule) <...>-5856 0D..2 618us : __schedule <<idle>-0> (20 162) <...>-5856 0D..2 619us : __spin_unlock_irq (__schedule) <...>-5856 0...1 619us : trace_stop_sched_switched (__schedule) <...>-5856 0D..1 619us : trace_stop_sched_switched <<...>-5856> (37 0) what is visible in this trace is that CPU#1 ran try_to_wake_up() for PID:5856, it placed PID:5856 on CPU#0's runqueue and ran resched_task() for CPU#0. But it decided to not send an IPI that no CPU - due to TS_POLLING. But CPU#0 never woke up after its NEED_RESCHED bit was set, and only rescheduled to PID:5856 upon the next lapic timer IRQ. The result was a 600+ usecs latency and a missed wakeup! the bug turned out to be an idle-wakeup bug introduced into the mainline kernel this summer via an optimization in the x86_64 tree: commit 495ab9c045e1b0e5c82951b762257fe1c9d81564 Author: Andi Kleen <ak@suse.de> Date: Mon Jun 26 13:59:11 2006 +0200 [PATCH] i386/x86-64/ia64: Move polling flag into thread_info_status During some profiling I noticed that default_idle causes a lot of memory traffic. I think that is caused by the atomic operations to clear/set the polling flag in thread_info. There is actually no reason to make this atomic - only the idle thread does it to itself, other CPUs only read it. So I moved it into ti->status. the problem is this type of change: if (!hlt_counter && boot_cpu_data.hlt_works_ok) { - clear_thread_flag(TIF_POLLING_NRFLAG); + current_thread_info()->status &= ~TS_POLLING; smp_mb__after_clear_bit(); while (!need_resched()) { local_irq_disable(); this changes clear_thread_flag() to an explicit clearing of TS_POLLING. clear_thread_flag() is defined as: clear_bit(flag, &ti->flags); and clear_bit() is a LOCK-ed atomic instruction on all x86 platforms: static inline void clear_bit(int nr, volatile unsigned long * addr) { __asm__ __volatile__( LOCK_PREFIX "btrl %1,%0" hence smp_mb__after_clear_bit() is defined as a simple compile barrier: #define smp_mb__after_clear_bit() barrier() but the explicit TS_POLLING clearing introduced by the patch: + current_thread_info()->status &= ~TS_POLLING; is not an atomic op! So the clearing of the TS_POLLING bit is freely reorderable with the reading of the NEED_RESCHED bit - and both now reside in different memory addresses. CPU idle wakeup very much depends on ordered memory ops, the clearing of the TS_POLLING flag must always be done before we test need_resched() and hit the idle instruction(s). [Symmetrically, the wakeup code needs to set NEED_RESCHED before it tests the TS_POLLING flag, so memory ordering is paramount.] Fernando's dual-core Athlon64 system has a sufficiently advanced memory ordering model so that it triggered this scenario very often. ( And it also turned out that the reason why these latencies never triggered on my testsystems is that i routinely use idle=poll, which was the only idle variant not affected by this bug. ) The fix is to change the smp_mb__after_clear_bit() to an smp_mb(), to act as an absolute barrier between the TS_POLLING write and the NEED_RESCHED read. This affects almost all idling methods (default, ACPI, APM), on all 3 x86 architectures: i386, x86_64, ia64. Signed-off-by: Ingo Molnar <mingo@elte.hu> Tested-by: Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] ptrace: Fix EFL_OFFSET value according to i386 pda changesJeremy Fitzhardinge2006-12-221-11/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PDA patches introduced a bug in ptrace: it reads eflags from the wrong place on the target's stack, but writes it back to the correct place. The result is a corrupted eflags, which is most visible when it turns interrupts off unexpectedly. This patch fixes this by making the ptrace code a little less fragile. It changes [gs]et_stack_long to take a straightforward byte offset into struct pt_regs, rather than requiring all callers to do a sizeof(struct pt_regs) offset adjustment. This means that the eflag's offset (EFL_OFFSET) on the target stack can be simply computed with offsetof(). Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Frederik Deweerdt <deweerdt@free.fr> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] memory hotplug: fix compile error for i386 with NUMA configYasunori Goto2006-12-222-8/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix compile error when config memory hotplug with numa on i386. The cause of compile error was missing of arch_add_memory(), remove_memory(), and memory_add_physaddr_to_nid(). Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@cs.washington.edu> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] microcode: fix mc_cpu_notifier section warningJean Delvare2006-12-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Structure mc_cpu_notifier references a __cpuinit function, but isn't declared __cpuinitdata itself: WARNING: arch/i386/kernel/microcode.o - Section mismatch: reference to .init.text: from .data after 'mc_cpu_notifier' (at offset 0x118) Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] compile error of register_memory()Yasunori Goto2006-12-222-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | register_memory() becomes double definition in 2.6.20-rc1. It is defined in arch/i386/kernel/setup.c as static definition in 2.6.19. But it is moved to arch/i386/kernel/e820.c in 2.6.20-rc1. And same name function is defined in driver/base/memory.c too. So, it becomes cause of compile error of duplicate definition if memory hotplug option is on. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: fix boot time hang in detect_calgary()Ingo Molnar2006-12-211-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | if CONFIG_CALGARY_IOMMU is built into the kernel via CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT, or is enabled via the iommu=calgary boot option, then the detect_calgary() function runs to detect the presence of a Calgary IOMMU. detect_calgary() first searches the BIOS EBDA area for a "rio_table_hdr" BIOS table. It has this parsing algorithm for the EBDA: while (offset) { ... /* The next offset is stored in the 1st word. 0 means no more */ offset = *((unsigned short *)(ptr + offset)); } got that? Lets repeat it slowly: we've got a BIOS-supplied data structure, plus Linux kernel code that will only break out of an infinite parsing loop once the BIOS gives a zero offset. Ok? Translation: what an excellent opportunity for BIOS writers to lock up the Linux boot process in an utterly hard to debug place! Indeed the BIOS jumped on that opportunity on my box, which has the following EBDA chaining layout: 384, 65282, 65535, 65535, 65535, 65535, 65535, 65535 ... see the pattern? So my, definitely non-Calgary system happily locks up in detect_calgary()! the patch below fixes the boot hang by trusting the BIOS-supplied data structure a bit less: the parser always has to make forward progress, and if it doesnt, we break out of the loop and i get the expected kernel message: Calgary: Unable to locate Rio Grande Table in EBDA - bailing! Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: fix boot hang caused by CALGARY_IOMMU_ENABLED_BY_DEFAULTIngo Molnar2006-12-211-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | one of my boxes didnt boot the 2.6.20-rc1-rt0 kernel rpm, it hung during early bootup. After an hour or two of happy debugging i narrowed it down to the CALGARY_IOMMU_ENABLED_BY_DEFAULT option, which was freshly added to 2.6.20 via the x86_64 tree and /enabled by default/. commit bff6547bb6a4e82c399d74e7fba78b12d2f162ed claims: [PATCH] Calgary: allow compiling Calgary in but not using it by default This patch makes it possible to compile Calgary in but not use it by default. In this mode, use 'iommu=calgary' to activate it. but the change does not actually practice it: config CALGARY_IOMMU_ENABLED_BY_DEFAULT bool "Should Calgary be enabled by default?" default y depends on CALGARY_IOMMU help Should Calgary be enabled by default? if you choose 'y', Calgary will be used (if it exists). If you choose 'n', Calgary will not be used even if it exists. If you choose 'n' and would like to use Calgary anyway, pass 'iommu=calgary' on the kernel command line. If unsure, say Y. it's both 'default y', and says "If unsure, say Y". Clearly not a typo. disabling this option makes my box boot again. The patch below fixes the Kconfig entry. Grumble. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6Linus Torvalds2006-12-212-4/+11
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (22 commits) acpiphp: Link-time error for PCI Hotplug shpchp: cleanup shpchp.h shpchp: remove shpchprm_get_physical_slot_number shpchp: cleanup struct controller shpchp: remove unnecessary struct php_ctlr PCI: ATI sb600 sata quirk PCI legacy resource fix PCI: don't export device IDs to userspace PCI: Be a bit defensive in quirk_nvidia_ck804() so we don't risk dereferencing a NULL pdev. PCI: Fix multiple problems with VIA hardware PCI: Only check the HT capability bits in mpic.c PCI: Use pci_find_ht_capability() in drivers/pci/quirks.c PCI: Add #defines for Hypertransport MSI fields PCI: Use pci_find_ht_capability() in drivers/pci/htirq.c PCI: Add pci_find_ht_capability() for finding Hypertransport capabilities PCI: Create __pci_bus_find_cap_start() from __pci_bus_find_cap() pci: Introduce pci_find_present PCI: pcieport-driver: remove invalid warning message rpaphp: compiler warning cleanup PCI quirks: remove redundant check ...
| * | | | PCI: Fix multiple problems with VIA hardwareAlan Cox2006-12-201-3/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is designed to fix: - Disk eating corruptor on KT7 after resume from RAM - VIA IRQ handling - VIA fixups for bus lockups after resume from RAM The core of this is to add a table of resume fixups run at resume time. We need to do this for a variety of boards and features, but particularly we need to do this to get various critical VIA fixups done on resume. The second part of the problem is to handle VIA IRQ number rules which are a bit odd and need special handling for PIC interrupts. Various patches broke various boxes and while this one may not be perfect (hopefully it is) it ensures the workaround is applied to the right devices only. From: Jean Delvare <khali@linux-fr.org> Now that PCI quirks are replayed on software resume, we can safely re-enable the Asus SMBus unhiding quirk even when software suspend support is enabled. [akpm@osdl.org: fix const warning] Signed-off-by: Alan Cox <alan@redhat.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | | PCI: Only check the HT capability bits in mpic.cMichael Ellerman2006-12-201-1/+1
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Only compare the exact HT capability bits against HT_CAPTYPE_IRQ, this is a little paranoid, but doesn't hurt. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | Merge branch 'merge' of ↵Linus Torvalds2006-12-2010-94/+401
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix register save area alignment for swapcontext syscall [POWERPC] Fix PCI device channel state initialization [POWERPC] Update MTD OF documentation [POWERPC] Probe Efika platform before CHRP. [POWERPC] Fix build of cell zImage.initrd [POWERPC] iSeries: fix CONFIG_VIOPATH dependency [POWERPC] iSeries: fix viocons init [POWERPC] iSeries: fix viocd init [POWERPC] iSeries: fix iseries_veth init [POWERPC] iSeries: fix viotape init [POWERPC] iSeries: fix viodasd init [POWERPC] Workaround oldworld OF bug with IRQs & P2P bridges [POWERPC] powerpc: add scanning of ebc bus to of_platform [POWERPC] spufs: fix assignment of node numbers [POWERPC] cell: Fix spufs with "new style" device-tree [POWERPC] cell: Enable spider workarounds on all PCI buses [POWERPC] cell: add forward struct declarations to spu.h [POWERPC] cell: update cell_defconfig
| * | | | [POWERPC] Fix register save area alignment for swapcontext syscallPaul Mackerras2006-12-201-3/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For 32-bit processes, the getcontext side of the swapcontext system call (i.e. the saving of the context when the first argument is non-NULL) has to set the ctx->uc_mcontext.uc_regs pointer to the place where it saves the registers. Which it does, but it doesn't ensure that the pointer is 16-byte aligned. 16-byte alignment is needed because the Altivec/VMX registers are saved in there, and they need to be on a 16-byte boundary. This fixes it by ensuring the appropriate alignment of the pointer. This issue was pointed out by Jakub Jelinek. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | [POWERPC] Fix PCI device channel state initializationLinas Vepstas2006-12-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Initialize the pci device pci channel state. This is critical for having the pci_channel_offline() routine (in pci.h) to function correctly. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | [POWERPC] Probe Efika platform before CHRP.David Woodhouse2006-12-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Efika matches chrp_probe() too, so put its own probe first to make sure we get it right in a multiplatform build. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | [POWERPC] Fix build of cell zImage.initrdBenjamin Herrenschmidt2006-12-201-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch adding support for zImage.ps3 didn't add a zImage.initrd.ps3 target causing builds of zImage.initrd to fail when ps3 is included in the .config. The current method of generating ps3 images doesn't support initrd's yet, so we create a dummy target that only displays a warning message instead. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | [POWERPC] iSeries: fix CONFIG_VIOPATH dependencyStephen Rothwell2006-12-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a long standing typo. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | [POWERPC] Workaround oldworld OF bug with IRQs & P2P bridgesBenjamin Herrenschmidt2006-12-201-2/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On some oldworld PowerMacs, OF doesn't assign interrupts properly beyond P2P bridges. Fortunately, the fix is easy as all those machines just wire all IRQ lines together to one IRQ which is assigned to the bridge itself. We already have a special function for parsing Apple OldWorld interrupts which are special, so let's add to it the ability to walk up the PCI tree to find interrupts. This fixes irqs on the lower slots of s900 clones among others. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | Merge branch 'cell-merge' of ↵Paul Mackerras2006-12-204-87/+369
| |\ \ \ \ | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6
| | * | | | [POWERPC] powerpc: add scanning of ebc bus to of_platformArnd Bergmann2006-12-191-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch add scanning of ebc bus to of_platform, which is needed to recognize devices located on that bus. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
| | * | | | [POWERPC] spufs: fix assignment of node numbersArnd Bergmann2006-12-191-18/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The difference between 'nid' and 'node' fields in an spu structure was used incorrectly. The common 'node' number now reflects the NUMA node, and it is used in other places in the code as well. The 'nid' value is meaningful only in one place, namely the computation of the interrupt numbers based on the physical location of an spu. Consequently, we look it up directly in the place where it is used now. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
| | * | | | [POWERPC] cell: Fix spufs with "new style" device-treeBenjamin Herrenschmidt2006-12-191-25/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some SPU code was a bit too convoluted and broke when adding support for the new style device-tree, most notably the struct pages for SPEs no longer get created. oops... Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
| | * | | | [POWERPC] cell: Enable spider workarounds on all PCI busesJens Osterkamp2006-12-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't limit spider I/O workarounds to the first two buses. The IBM Cell blade has three of them (one PCI, two PCIe) and we want to handle them all. Signed-off-by: Jens Osterkamp <jens@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
| | * | | | [POWERPC] cell: update cell_defconfigArnd Bergmann2006-12-191-44/+314
| | | |/ / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | New options appeared in the kernel, and new hardware became available for us to use. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
generated by cgit v1.1 at 2024-10-30 06:12:50 +0000