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2009-09-14Merge branch 'x86-asm-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86/i386: Put aligned stack-canary in percpu shared_aligned section x86/i386: Make sure stack-protector segment base is cache aligned x86: Detect stack protector for i386 builds on x86_64 x86: allow "=rm" in native_save_fl() x86: properly annotate alternatives.c x86: Introduce GDT_ENTRY_INIT(), initialize bad_bios_desc statically x86, 32-bit: Use generic sys_pipe() x86: Introduce GDT_ENTRY_INIT(), fix APM x86: Introduce GDT_ENTRY_INIT() x86: Introduce set_desc_base() and set_desc_limit() x86: Remove unused patch_espfix_desc() x86: Use get_desc_base()
2009-09-14Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (24 commits) ACPI, x86: expose some IO-APIC routines when CONFIG_ACPI=n x86, apic: Slim down stack usage in early_init_lapic_mapping() x86, ioapic: Get rid of needless check and simplify ioapic_setup_resources() x86, ioapic: Define IO_APIC_DEFAULT_PHYS_BASE constant x86: Fix x86_model test in es7000_apic_is_cluster() x86, apic: Move dmar_table_init() out of enable_IR() x86, ioapic: Panic on irq-pin binding only if needed x86/apic: Enable x2APIC without interrupt remapping under KVM x86, apic: Drop redundant bit assignment x86, ioapic: Throw BUG instead of NULL dereference x86, ioapic: Introduce for_each_irq_pin() helper x86: Remove superfluous NULL pointer check in destroy_irq() x86/ioapic.c: unify ioapic_retrigger_irq() x86/ioapic.c: convert __target_IO_APIC_irq to conventional for() loop x86/ioapic.c: clean up replace_pin_at_irq_node logic and comments x86/ioapic.c: convert replace_pin_at_irq_node to conventional for() loop x86/ioapic.c: simplify add_pin_to_irq_node() x86/ioapic.c: convert io_apic_level_ack_pending loop to normal for() loop x86/ioapic.c: move lost comment to what seems like appropriate place x86/ioapic.c: remove redundant declaration of irq_pin_list ...
2009-09-11Merge branch 'tracing-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (105 commits) ring-buffer: only enable ring_buffer_swap_cpu when needed ring-buffer: check for swapped buffers in start of committing tracing: report error in trace if we fail to swap latency buffer tracing: add trace_array_printk for internal tracers to use tracing: pass around ring buffer instead of tracer tracing: make tracing_reset safe for external use tracing: use timestamp to determine start of latency traces tracing: Remove mentioning of legacy latency_trace file from documentation tracing/filters: Defer pred allocation, fix memory leak tracing: remove users of tracing_reset tracing: disable buffers and synchronize_sched before resetting tracing: disable update max tracer while reading trace tracing: print out start and stop in latency traces ring-buffer: disable all cpu buffers when one finds a problem ring-buffer: do not count discarded events ring-buffer: remove ring_buffer_event_discard ring-buffer: fix ring_buffer_read crossing pages ring-buffer: remove unnecessary cpu_relax ring-buffer: do not swap buffers during a commit ring-buffer: do not reset while in a commit ...
2009-09-11Merge branch 'perfcounters-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (60 commits) perf tools: Avoid unnecessary work in directory lookups perf stat: Clean up statistics calculations a bit more perf stat: More advanced variance computation perf stat: Use stddev_mean in stead of stddev perf stat: Remove the limit on repeat perf stat: Change noise calculation to use stddev x86, perf_counter, bts: Do not allow kernel BTS tracing for now x86, perf_counter, bts: Correct pointer-to-u64 casts x86, perf_counter, bts: Fail if BTS is not available perf_counter: Fix output-sharing error path perf trace: Fix read_string() perf trace: Print out in nanoseconds perf tools: Seek to the end of the header area perf trace: Fix parsing of perf.data perf trace: Sample timestamps as well perf_counter: Introduce new (non-)paranoia level to allow raw tracepoint access perf trace: Sample the CPU too perf tools: Work around strict aliasing related warnings perf tools: Clean up warnings list in the Makefile perf tools: Complete support for dynamic strings ...
2009-09-11Merge branch 'core-iommu-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (59 commits) x86/gart: Do not select AGP for GART_IOMMU x86/amd-iommu: Initialize passthrough mode when requested x86/amd-iommu: Don't detach device from pt domain on driver unbind x86/amd-iommu: Make sure a device is assigned in passthrough mode x86/amd-iommu: Align locking between attach_device and detach_device x86/amd-iommu: Fix device table write order x86/amd-iommu: Add passthrough mode initialization functions x86/amd-iommu: Add core functions for pd allocation/freeing x86/dma: Mark iommu_pass_through as __read_mostly x86/amd-iommu: Change iommu_map_page to support multiple page sizes x86/amd-iommu: Support higher level PTEs in iommu_page_unmap x86/amd-iommu: Remove old page table handling macros x86/amd-iommu: Use 2-level page tables for dma_ops domains x86/amd-iommu: Remove bus_addr check in iommu_map_page x86/amd-iommu: Remove last usages of IOMMU_PTE_L0_INDEX x86/amd-iommu: Change alloc_pte to support 64 bit address space x86/amd-iommu: Introduce increase_address_space function x86/amd-iommu: Flush domains if address space size was increased x86/amd-iommu: Introduce set_dte_entry function x86/amd-iommu: Add a gneric version of amd_iommu_flush_all_devices ...
2009-09-11Merge branch 'core-debug-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: debug lockups: Improve lockup detection, fix generic arch fallback debug lockups: Improve lockup detection
2009-09-11Merge branch 'kmemleak' of git://linux-arm.org/linux-2.6Linus Torvalds
* 'kmemleak' of git://linux-arm.org/linux-2.6: kmemleak: Improve the "Early log buffer exceeded" error message kmemleak: fix sparse warning for static declarations kmemleak: fix sparse warning over overshadowed flags kmemleak: move common painting code together kmemleak: add clear command support kmemleak: use bool for true/false questions kmemleak: Do no create the clean-up thread during kmemleak_disable() kmemleak: Scan all thread stacks kmemleak: Don't scan uninitialized memory when kmemcheck is enabled kmemleak: Ignore the aperture memory hole on x86_64 kmemleak: Printing of the objects hex dump kmemleak: Do not report alloc_bootmem blocks as leaks kmemleak: Save the stack trace for early allocations kmemleak: Mark the early log buffer as __initdata kmemleak: Dump object information on request kmemleak: Allow rescheduling during an object scanning
2009-09-11Merge branch 'next' into for-linusJames Morris
2009-09-06Merge commit 'v2.6.31-rc9' into tracing/coreIngo Molnar
Merge reason: move from -rc5 to -rc9. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-04Merge branch 'amd-iommu/2.6.32' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into core/iommu
2009-09-04x86, perf_counter, bts: Do not allow kernel BTS tracing for nowmarkus.t.metzger@intel.com
Kernel BTS tracing generates too much data too fast for us to handle, causing the kernel to hang. Fail for BTS requests for kernel code. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Acked-by: Peter Zijlstra <a.p.zjilstra@chello.nl> LKML-Reference: <20090902140616.901253000@intel.com> [ This is really a workaround - but we want BTS tracing in .32 so make sure we dont regress. The lockup should be fixed ASAP. ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-04x86, perf_counter, bts: Correct pointer-to-u64 castsmarkus.t.metzger@intel.com
On 32bit, pointers in the DS AREA configuration are cast to u64. The current (long) cast to avoid compiler warnings results in a signed 64bit address. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090902140615.305889000@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-04x86, perf_counter, bts: Fail if BTS is not availablemarkus.t.metzger@intel.com
Reserve PERF_COUNT_HW_BRANCH_INSTRUCTIONS with sample_period == 1 for BTS tracing and fail, if BTS is not available. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090902140612.943801000@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-04x86/i386: Put aligned stack-canary in percpu shared_aligned sectionJeremy Fitzhardinge
Pack aligned things together into a special section to minimize padding holes. Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Tejun Heo <tj@kernel.org> LKML-Reference: <4AA035C0.9070202@goop.org> [ queued up in tip:x86/asm because it depends on this commit: x86/i386: Make sure stack-protector segment base is cache aligned ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-03x86/i386: Make sure stack-protector segment base is cache alignedJeremy Fitzhardinge
The Intel Optimization Reference Guide says: In Intel Atom microarchitecture, the address generation unit assumes that the segment base will be 0 by default. Non-zero segment base will cause load and store operations to experience a delay. - If the segment base isn't aligned to a cache line boundary, the max throughput of memory operations is reduced to one [e]very 9 cycles. [...] Assembly/Compiler Coding Rule 15. (H impact, ML generality) For Intel Atom processors, use segments with base set to 0 whenever possible; avoid non-zero segment base address that is not aligned to cache line boundary at all cost. We can't avoid having a non-zero base for the stack-protector segment, but we can make it cache-aligned. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: <stable@kernel.org> LKML-Reference: <4AA01893.6000507@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-03Merge branch 'amd-iommu/pagetable' into amd-iommu/2.6.32Joerg Roedel
Conflicts: arch/x86/kernel/amd_iommu.c
2009-09-03Merge branch 'amd-iommu/passthrough' into amd-iommu/2.6.32Joerg Roedel
Conflicts: arch/x86/kernel/amd_iommu.c arch/x86/kernel/amd_iommu_init.c
2009-09-03Merge branches 'gart/fixes', 'amd-iommu/fixes+cleanups' and ↵Joerg Roedel
'amd-iommu/fault-handling' into amd-iommu/2.6.32
2009-09-03x86/amd-iommu: Initialize passthrough mode when requestedJoerg Roedel
This patch enables the passthrough mode for AMD IOMMU by running the initialization function when iommu=pt is passed on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Don't detach device from pt domain on driver unbindJoerg Roedel
This patch makes sure a device is not detached from the passthrough domain when the device driver is unloaded or does otherwise release the device. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Make sure a device is assigned in passthrough modeJoerg Roedel
When the IOMMU driver runs in passthrough mode it has to make sure that every device not assigned to an IOMMU-API domain must be put into the passthrough domain instead of keeping it unassigned. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Align locking between attach_device and detach_deviceJoerg Roedel
This patch makes the locking behavior between the functions attach_device and __attach_device consistent with the locking behavior between detach_device and __detach_device. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Fix device table write orderJoerg Roedel
The V bit of the device table entry has to be set after the rest of the entry is written to not confuse the hardware. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Add passthrough mode initialization functionsJoerg Roedel
When iommu=pt is passed on kernel command line the devices should run untranslated. This requires the allocation of a special domain for that purpose. This patch implements the allocation and initialization path for iommu=pt. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Add core functions for pd allocation/freeingJoerg Roedel
This patch factors some code of protection domain allocation into seperate functions. This way the logic can be used to allocate the passthrough domain later. As a side effect this patch fixes an unlikely domain id leakage bug. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/dma: Mark iommu_pass_through as __read_mostlyJoerg Roedel
This variable is read most of the time. This patch marks it as such. It also documents the meaning the this variable while at it. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Change iommu_map_page to support multiple page sizesJoerg Roedel
This patch adds a map_size parameter to the iommu_map_page function which makes it generic enough to handle multiple page sizes. This also requires a change to alloc_pte which is also done in this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Support higher level PTEs in iommu_page_unmapJoerg Roedel
This patch changes fetch_pte and iommu_page_unmap to support different page sizes too. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Use 2-level page tables for dma_ops domainsJoerg Roedel
The driver now supports a dynamic number of levels for IO page tables. This allows to reduce the number of levels for dma_ops domains by one because a dma_ops domain has usually an address space size between 128MB and 4G. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Remove bus_addr check in iommu_map_pageJoerg Roedel
The driver now supports full 64 bit device address spaces. So this check is not longer required. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Remove last usages of IOMMU_PTE_L0_INDEXJoerg Roedel
This change allows to remove these old macros later. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Change alloc_pte to support 64 bit address spaceJoerg Roedel
This patch changes the alloc_pte function to be able to map pages into the whole 64 bit address space supported by AMD IOMMU hardware from the old limit of 2**39 bytes. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Introduce increase_address_space functionJoerg Roedel
This function will be used to increase the address space size of a protection domain. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Flush domains if address space size was increasedJoerg Roedel
Thist patch introduces the update_domain function which propagates the larger address space of a protection domain to the device table and flushes all relevant DTEs and the domain TLB. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Introduce set_dte_entry functionJoerg Roedel
This function factors out some logic of attach_device to a seperate function. This new function will be used to update device table entries when necessary. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Add a gneric version of amd_iommu_flush_all_devicesJoerg Roedel
This patch adds a generic variant of amd_iommu_flush_all_devices function which flushes only the DTEs for a given protection domain. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Use fetch_pte in amd_iommu_iova_to_physJoerg Roedel
Don't reimplement the page table walker in this function. Use the generic one. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Use fetch_pte in iommu_unmap_pageJoerg Roedel
Instead of reimplementing existing logic use fetch_pte to walk the page table in iommu_unmap_page. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Make fetch_pte aware of dynamic mapping levelsJoerg Roedel
This patch changes the fetch_pte function in the AMD IOMMU driver to support dynamic mapping levels. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Reset command buffer if wait loop failsJoerg Roedel
Instead of a panic on an comletion wait loop failure, try to recover from that event from resetting the command buffer. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Panic if IOMMU command buffer reset failsJoerg Roedel
To prevent the driver from doing recursive command buffer resets, just panic when that recursion happens. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Reset command buffer on ILLEGAL_COMMAND_ERRORJoerg Roedel
On an ILLEGAL_COMMAND_ERROR the IOMMU stops executing further commands. This patch changes the code to handle this case better by resetting the command buffer in the IOMMU. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Add reset function for command buffersJoerg Roedel
This patch factors parts of the command buffer initialization code into a seperate function which can be used to reset the command buffer later. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Add function to flush all DTEs on one IOMMUJoerg Roedel
This function flushes all DTE entries on one IOMMU for all devices behind this IOMMU. This is required for command buffer resetting later. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: fix broken check in amd_iommu_flush_all_devicesJoerg Roedel
The amd_iommu_pd_table is indexed by protection domain number and not by device id. So this check is broken and must be removed. Cc: stable@kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Remove redundant 'IOMMU' stringJoerg Roedel
The 'IOMMU: ' prefix is not necessary because the DUMP_printk macro already prints its own prefix. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: replace "AMD IOMMU" by "AMD-Vi"Joerg Roedel
This patch replaces the "AMD IOMMU" printk strings with the official name for the hardware: "AMD-Vi". Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Remove some merge helper codeJoerg Roedel
This patch removes some left-overs which where put into the code to simplify merging code which also depends on changes in other trees. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Introduce function for iommu-local domain flushJoerg Roedel
This patch introduces a function to flush all domain tlbs for on one given IOMMU. This is required later to reset the command buffer on one IOMMU. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-09-03x86/amd-iommu: Dump illegal command on ILLEGAL_COMMAND_ERRORJoerg Roedel
This patch adds code to dump the command which caused an ILLEGAL_COMMAND_ERROR raised by the IOMMU hardware. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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