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* [SPARC64]: Wrap SMP IPIs with irq_enter()/irq_exit().David S. Miller2008-04-25
| | | | | | | | | | | | | Otherwise all sorts of bad things can happen, including spurious softlockup reports. Other platforms have this same bug, in one form or another, just don't see the issue because they don't sleep as long as sparc64 can in NOHZ. Thanks to some brilliant debugging by Peter Zijlstra. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix args to 64-bit sys_semctl() via sys_ipc().David S. Miller2008-04-25
| | | | | | | | Second and third arguments were swapped for whatever reason. Reported by Tom Callaway. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Detect trap frames in stack backtraces.David S. Miller2008-04-24
| | | | | | | Now that we have a magic cookie in the pt_regs, we can properly detect trap frames in stack bactraces. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: %l6 trap return handling no longer necessary.David S. Miller2008-04-24
| | | | | | | | | | Now that we indicate the "restart system call" in the trap type field of pt_regs->magic, we don't need to set the %l6 boolean in all of the trap return paths. And we therefore don't need to pass it to do_notify_resume(). Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Use trap type stored in pt_regs to handle syscall restart.David S. Miller2008-04-24
| | | | | | | Now that we can check the trap type directly, we don't need the funny restart_syscall indication from the trap return paths. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Store magic cookie and trap type in pt_regs.David S. Miller2008-04-24
| | | | | | | | | | | | | | | | | | | This sets us up for several simplifications and facilities: 1) The magic cookie lets us identify trap frames more accurately in stack backtraces. 2) The trap type lets us simplify all of the "are we in a syscall" state management and checks. 3) We can now see if a task off the cpu is sleeping in a system call or not. In fact, we can see what trap it is sleeping in whatever the type. The utrace guys will use this. Based upon some discussions with Roland McGrath. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: PROM debug console can be CON_ANYTIME.David S. Miller2008-04-24
| | | | | | | No per-cpu or similar resources need to be setup before we can use this console device. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: cleanup after SunOS/Solaris binary emulation removalAdrian Bunk2008-04-24
| | | | | | | | | | The following cleanups are now possible: - arch/sparc64/kernel/entry.S:ret_sys_call no longer has to be global - arch/sparc64/kernel/sparc64_ksyms.c: remove no longer used prototypes Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Add NUMA support.David S. Miller2008-04-24
| | | | | | | | Currently there is only code to parse NUMA attributes on sun4v/niagara systems, but later on we will add such parsing for older systems. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Allocate TSB node-local.David S. Miller2008-04-24
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: NUMA device infrastructure.David S. Miller2008-04-24
| | | | | | Record and propagate NUMA information for devices. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Kill pci_iommu_table_init() declaration.David S. Miller2008-04-24
| | | | | | No longer exists. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Once we have the boot cmdline, call parse_early_param()David S. Miller2008-04-24
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Initialize MDESC earlier and use lmb_alloc()David S. Miller2008-04-24
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Use lmb_alloc() for PROM device tree.David S. Miller2008-04-24
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Call real_setup_per_cpu_areas() earlier and use lmb_alloc().David S. Miller2008-04-24
| | | | | | | We have to do it like this before we can move the PROM and MDESC device tree code over to using lmb_alloc(). Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fully use LMB information in bootmem_init().David S. Miller2008-04-24
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Start using LMB information in bootmem_init().David S. Miller2008-04-24
| | | | | | | This allows us to kill the incredibly complicated and stupid function trim_pavail(). Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Initialize LMB tables.David S. Miller2008-04-24
| | | | | | | Call lmb_add() on available regions, and call lmb_reserve() on the main kernel image and the ramdisk (if any). Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Move ramdisk discovery code out to seperate function.David S. Miller2008-04-24
| | | | | | | And add some comments explaining all of the quirks involved in the way the bootloader provides this information. Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-04-21
|\ | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC]: Remove SunOS and Solaris binary support.
| * [SPARC]: Remove SunOS and Solaris binary support.David S. Miller2008-04-21
| | | | | | | | | | | | As per Documentation/feature-removal-schedule.txt Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'master' of ↵Linus Torvalds2008-04-21
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (202 commits) [POWERPC] Fix compile breakage for 64-bit UP configs [POWERPC] Define copy_siginfo_from_user32 [POWERPC] Add compat handler for PTRACE_GETSIGINFO [POWERPC] i2c: Fix build breakage introduced by OF helpers [POWERPC] Optimize fls64() on 64-bit processors [POWERPC] irqtrace support for 64-bit powerpc [POWERPC] Stacktrace support for lockdep [POWERPC] Move stackframe definitions to common header [POWERPC] Fix device-tree locking vs. interrupts [POWERPC] Make pci_bus_to_host()'s struct pci_bus * argument const [POWERPC] Remove unused __max_memory variable [POWERPC] Simplify xics direct/lpar irq_host setup [POWERPC] Use pseries_setup_i8259_cascade() in pseries_mpic_init_IRQ() [POWERPC] Turn xics_setup_8259_cascade() into a generic pseries_setup_i8259_cascade() [POWERPC] Move xics_setup_8259_cascade() into platforms/pseries/setup.c [POWERPC] Use asm-generic/bitops/find.h in bitops.h [POWERPC] 83xx: mpc8315 - fix USB UTMI Host setup [POWERPC] 85xx: Fix the size of qe muram for MPC8568E [POWERPC] 86xx: mpc86xx_hpcn - Temporarily accept old dts node identifier. [POWERPC] 86xx: mark functions static, other minor cleanups ...
| * \ Merge branch 'linux-2.6'Paul Mackerras2008-04-14
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| * \ \ Merge branch 'linux-2.6'Paul Mackerras2008-03-25
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| * \ \ \ Merge branch 'linux-2.6'Paul Mackerras2008-03-13
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| * \ \ \ \ Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/lmb-2.6Paul Mackerras2008-02-26
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| | * | | | | [LIB]: Make PowerPC LMB code generic so sparc64 can use it too.David S. Miller2008-02-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | | | arch: Remove unnecessary inclusions of asm/semaphore.hMatthew Wilcox2008-04-18
| |_|_|_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | None of these files use any of the functionality promised by asm/semaphore.h. It's possible that they rely on it dragging in some unrelated header file, but I can't build all these files, so we'll have fix any build failures as they come up. Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
* | | | | | Generic semaphore implementationMatthew Wilcox2008-04-17
| |_|_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Semaphores are no longer performance-critical, so a generic C implementation is better for maintainability, debuggability and extensibility. Thanks to Peter Zijlstra for fixing the lockdep warning. Thanks to Harvey Harrison for pointing out that the unlikely() was unnecessary. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu>
* | | | | [SPARC]: Fix several regset and ptrace bugs.David S. Miller2008-04-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) ptrace should pass 'current' to task_user_regset_view() 2) When fetching general registers using a 64-bit view, and the target is 32-bit, we have to convert. 3) Skip the whole register window get/set code block if the user isn't asking to access anything in there. Otherwise we have problems if the user doesn't have an address space setup. Fetching ptrace register is still valid at such a time, and ptrace does not try to access the register window area of the regset. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | [SPARC64]: Fix user accesses in regset code.David S. Miller2008-04-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If target is not current we need to use access_process_vm(). Noticed by Roland McGrath. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | [SPARC64]: Fix FPU saving in 64-bit signal handling.David S. Miller2008-04-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The calculation of the FPU reg save area pointer was wrong. Based upon an OOPS report from Tom Callaway. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | sparc64: remove unused calc_npages() in iommu_common.hFUJITA Tomonori2008-03-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | sparc64: add the segment boundary checking to IOMMUs while merging SG entriesFUJITA Tomonori2008-03-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some IOMMUs allocate memory areas spanning LLD's segment boundary limit. It forces low level drivers to have a workaround to adjust scatter lists that the IOMMU builds. We are in the process of making all the IOMMUs respect the segment boundary limits to remove such work around in LLDs. SPARC64 IOMMUs were rewritten to use the IOMMU helper functions and the commit 89c94f2f70d093f59b55d3ea8042d13889169346 made the IOMMUs not allocate memory areas spanning the segment boundary limit. However, SPARC64 IOMMUs allocate memory areas first then try to merge them (while some IOMMUs walk through all the sg entries to see how they can be merged first and allocate memory areas). So SPARC64 IOMMUs also need the boundary limit checking when they try to merge sg entries. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | [SPARC64]: Don't open-code {get,put}_cpu_var() in flush_tlb_pending().David S. Miller2008-03-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Noticed by Andrew Morton. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-03-26
|\ \ \ \ \ | |_|_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Define TASK_SIZE_OF() [SPARC64]: flush_ptrace_access() needs preemption disable. [SPARC64]: Update defconfig. [SPARC64]: Fix allnoconfig build, ptrace.c missing CONFIG_COMPAT checks. [SPARC64]: Fix __get_cpu_var in preemption-enabled area. [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/signal.c [SPARC64]: Fix most sparse warnings in arch/sparc64/kernel/sys_sparc.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/ptrace.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/iommu.c [SPARC64]: Fix sparse errors in arch/sparc64/kernel/traps.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/{cpu,setup}.c [SPARC64]: Adjust {TLBTEMP,TSBMAP}_BASE. [SPARC64]: Make save_stack_trace() more efficient.
| * | | | [SPARC64]: flush_ptrace_access() needs preemption disable.David S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Based upon a report by Mariusz Kozlowski. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Update defconfig.David S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix allnoconfig build, ptrace.c missing CONFIG_COMPAT checks.David S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix __get_cpu_var in preemption-enabled area.David S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reported by Mariusz Kozlowski. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/signal.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix most sparse warnings in arch/sparc64/kernel/sys_sparc.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sparse still doesn't like the funny cast we make from a scalar to a "union semun" (which is correct by the C language and in particular works with the sparc64 calling conventions, but sparse doesn't grok that yet). Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/ptrace.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/iommu.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix local variable shadowing in dma_4u_map_sg(). Mark sun4u_dma_ops static. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix sparse errors in arch/sparc64/kernel/traps.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add 'UL' markers to DCU_* macros. Declare C functions called from assembler in entry.h Declare C functions called from within the sparc64 arch code in include/asm-sparc64/*.h headers as appropriate. Remove unused routines in traps.c Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/{cpu,setup}.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We create a local header file entry.h, under arch/sparc64/kernel/, that we can use to declare routines either defined in assembler or only invoked from assembler. As well as other data objects which are private to the inner sparc64 kernel arch code. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | [SPARC64]: Make save_stack_trace() more efficient.David S. Miller2008-03-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Doing a 'flushw' every stack trace capture creates so much overhead that it makes lockdep next to unusable. We only care about the frame pointer chain and the function caller program counters, so flush those by hand to the stack frame. This is significantly more efficient than a 'flushw' because: 1) We only save 16 bytes per active register window to the stack. 2) This doesn't push the entire register window context of the current call chain out of the cpu, forcing register window fill traps as we return back down. Note that we can't use 'restore' and 'save' instructions to move around the register windows because that wouldn't work on Niagara processors. They optimize 'save' into a new register window by simply clearing out the registers instead of pulling them in from the on-chip register window backing store. Based upon a report by Tom Callaway. Signed-off-by: David S. Miller <davem@davemloft.net>
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