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* Merge branch 'oprofile-for-linus' of ↵Linus Torvalds2009-06-101-4/+23
|\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'oprofile-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: oprofile: introduce module_param oprofile.cpu_type oprofile: add support for Core i7 and Atom oprofile: remove undocumented oprofile.p4force option oprofile: re-add force_arch_perfmon option
| * oprofile: introduce module_param oprofile.cpu_typeRobert Richter2009-05-081-2/+11
| | | | | | | | | | | | | | | | | | | | | | This patch removes module_param oprofile.force_arch_perfmon and introduces oprofile.cpu_type=archperfmon instead. This new parameter can be reused for other models and architectures. Currently only archperfmon is supported. Cc: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * oprofile: add support for Core i7 and AtomAndi Kleen2009-05-081-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The registers are about the same as other Family 6 CPUs so we only need to add detection. I'm not completely happy with calling Nehalem Core i7 because there will be undoubtedly other Nehalem based CPUs in the future with different marketing names, but it's the best we got for now. Requires updated oprofile userland for the new event files. If you don't want to update right now you can also use oprofile.force_arch_perfmon=1 (added in the next patch) with 0.9.4 Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * oprofile: remove undocumented oprofile.p4force optionAndi Kleen2009-05-081-4/+1
| | | | | | | | | | | | | | | | | | | | There are no new P4s and the oprofile code knows about all existing ones, so we don't really need the p4force option anymore. Remove it. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * oprofile: re-add force_arch_perfmon optionAndi Kleen2009-05-081-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This re-adds the force_arch_perfmon option that was in the original arch perfmon patchkit. Originally this was rejected in favour of a generalized perfmon=name option, but it turned out implementing the later in a reliable way is hard (and it would have been easy to crash the kernel if a user gets it wrong) But now Atom and Core i7 support being readded a user would need to update their oprofile userland to beyond 0.9.4 to use oprofile again on Atom or Core i7. To avoid this problem readd the force_arch_perfmon option. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
* | Merge branch 'signal-for-linus' of ↵Linus Torvalds2009-06-104-0/+5
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'signal-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: hookup sys_rt_tgsigqueueinfo signals: implement sys_rt_tgsigqueueinfo signals: split do_tkill
| * | x86: hookup sys_rt_tgsigqueueinfoThomas Gleixner2009-04-304-0/+5
| |/ | | | | | | | | | | Make the new sys_rt_tgsigqueueinfo available for x86. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | Merge branch 'iommu-for-linus' of ↵Linus Torvalds2009-06-108-330/+622
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (61 commits) amd-iommu: remove unnecessary "AMD IOMMU: " prefix amd-iommu: detach device explicitly before attaching it to a new domain amd-iommu: remove BUS_NOTIFY_BOUND_DRIVER handling dma-debug: simplify logic in driver_filter() dma-debug: disable/enable irqs only once in device_dma_allocations dma-debug: use pr_* instead of printk(KERN_* ...) dma-debug: code style fixes dma-debug: comment style fixes dma-debug: change hash_bucket_find from first-fit to best-fit x86: enable GART-IOMMU only after setting up protection methods amd_iommu: fix lock imbalance dma-debug: add documentation for the driver filter dma-debug: add dma_debug_driver kernel command line dma-debug: add debugfs file for driver filter dma-debug: add variables and checks for driver filter dma-debug: fix debug_dma_sync_sg_for_cpu and debug_dma_sync_sg_for_device dma-debug: use sg_dma_len accessor dma-debug: use sg_dma_address accessor instead of using dma_address directly amd-iommu: don't free dma adresses below 512MB with CONFIG_IOMMU_STRESS amd-iommu: don't preallocate page tables with CONFIG_IOMMU_STRESS ...
| * | amd-iommu: remove unnecessary "AMD IOMMU: " prefixJoerg Roedel2009-06-091-3/+2
| | | | | | | | | | | | | | | | | | | | | That prefix is already included in the DUMP_printk macro. So there is no need to repeat it in the format string. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | amd-iommu: detach device explicitly before attaching it to a new domainJoerg Roedel2009-06-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a bug with a device that could not be assigned to a KVM guest because it is still assigned to a dma_ops protection domain. [chrisw: simply remove WARN_ON(), will always fire since dev->driver will be pci-sub] Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | amd-iommu: remove BUS_NOTIFY_BOUND_DRIVER handlingJoerg Roedel2009-06-091-11/+0
| | | | | | | | | | | | | | | | | | | | | | | | Handling this event causes device assignment in KVM to fail because the device gets re-attached as soon as the pci-stub registers as the driver for the device. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | Merge commit 'tip/core/iommu' into amd-iommu/fixesJoerg Roedel2009-06-09291-3290/+6668
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| | * \ Merge branch 'linus' into core/iommuIngo Molnar2009-06-07285-3064/+6066
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: This branch was on an -rc5 base so pull almost-2.6.30 to resync with the latest upstream fixes and make sure the combination works fine. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | x86: enable GART-IOMMU only after setting up protection methodsMark Langsdorf2009-06-061-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current code to set up the GART as an IOMMU enables GART translations before it removes the aperture from the kernel memory map, sets the GART PTEs to UC, sets up the guard and scratch pages, or does a wbinvd(). This leaves the possibility of cache aliasing open and can cause system crashes. Re-order the code so as to enable the GART translations only after all safeguards are in place and the tlb has been flushed. AMD has tested this patch on both Istanbul systems and 1st generation Opteron systems with APG enabled and seen no adverse effects. Istanbul systems with HT Assist enabled sometimes see MCE errors due to cache artifacts with the unmodified code. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> Cc: <stable@kernel.org> Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: akpm@linux-foundation.org Cc: jbarnes@virtuousgeek.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
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| | *---. \ \ Merge branches 'amd-iommu/fixes', 'amd-iommu/debug', ↵Joerg Roedel2009-05-285-224/+594
| | |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'amd-iommu/suspend-resume' and 'amd-iommu/extended-allocator' into amd-iommu/2.6.31 Conflicts: arch/x86/kernel/amd_iommu.c arch/x86/kernel/amd_iommu_init.c
| | | | | * | | amd-iommu: don't free dma adresses below 512MB with CONFIG_IOMMU_STRESSJoerg Roedel2009-05-281-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This will test the automatic aperture enlargement code. This is important because only very few devices will ever trigger this code path. So force it under CONFIG_IOMMU_STRESS. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: don't preallocate page tables with CONFIG_IOMMU_STRESSJoerg Roedel2009-05-281-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This forces testing of on-demand page table allocation code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: disable round-robin allocator for CONFIG_IOMMU_STRESSJoerg Roedel2009-05-281-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Disabling the round-robin allocator results in reusing the same dma-addresses again very fast. This is a good test if the iotlb flushing is working correctly. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: remove amd_iommu_size kernel parameterJoerg Roedel2009-05-282-29/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This parameter is not longer necessary when aperture increases dynamically. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: enlarge the aperture dynamicallyJoerg Roedel2009-05-281-2/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | By dynamically increasing the aperture the extended allocator is now ready for use. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: handle exlusion ranges and unity mappings in alloc_new_rangeJoerg Roedel2009-05-281-11/+60
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes sure no reserved addresses are allocated in an dma_ops domain when the aperture is increased dynamically. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: move aperture_range allocation code to seperate functionJoerg Roedel2009-05-281-36/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch prepares the dynamic increasement of dma_ops domain apertures. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: change dma_dom->next_bit to dma_dom->next_addressJoerg Roedel2009-05-282-9/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simplify the code a little bit by using the same unit for all address space related state in the dma_ops domain structure. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: make address allocator aware of multiple aperture rangesJoerg Roedel2009-05-282-39/+110
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes the AMD IOMMU address allocator to allow up to 32 aperture ranges per dma_ops domain. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: handle page table allocation failures in dma_ops codeJoerg Roedel2009-05-281-2/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code will be required when the aperture size increases dynamically in the extended address allocator. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: move page table allocation code to seperate functionJoerg Roedel2009-05-281-25/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes page table allocation usable for dma_ops code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | | * | | amd-iommu: introduce aperture_range structureJoerg Roedel2009-05-282-35/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a preperation for extended address allocator. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd-iommu: implement suspend/resumeJoerg Roedel2009-05-281-1/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch puts everything together and enables suspend/resume support in the AMD IOMMU driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd_iommu: un __init functions required for suspend/resumeJoerg Roedel2009-05-281-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes sure that no function required for suspend/resume of AMD IOMMU driver is thrown away after boot. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd-iommu: add function to flush tlb for all devicesJoerg Roedel2009-05-282-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This function is required for suspend/resume support with AMD IOMMU enabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd-iommu: add function to flush tlb for all domainsJoerg Roedel2009-05-282-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This function is required for suspend/resume support with AMD IOMMU enabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd-iommu: add function to disable all iommusJoerg Roedel2009-05-281-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This function is required for suspend/resume support with AMD IOMMU enabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd-iommu: remove support for msi-xJoerg Roedel2009-05-281-43/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current hardware uses msi instead of msi-x so this code it not necessary and can not be tested. The best thing is to drop this code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd-iommu: drop pointless iommu-loop in msi setup codeJoerg Roedel2009-05-281-7/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is not necessary to loop again over all IOMMUs in this code. So drop the loop. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd-iommu: consolidate hardware initialization to one functionJoerg Roedel2009-05-281-18/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch restructures the AMD IOMMU initialization code to initialize all hardware registers with one single function call. This is helpful for suspend/resume support. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | | * | | | amd-iommu: introduce for_each_iommu* macrosJoerg Roedel2009-05-283-8/+16
| | | | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces the for_each_iommu and for_each_iommu_safe macros to simplify the developers life when having to iterate over all AMD IOMMUs in the system. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | * | | | amd-iommu: disable device isolation with CONFIG_IOMMU_STRESSJoerg Roedel2009-05-281-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With device isolation disabled we can test better for race conditions in dma_ops related code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | * | | | x86/iommu: add IOMMU_STRESS Kconfig entryJoerg Roedel2009-05-281-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This Kconfig option is intended to enable various code paths or parameters in IOMMU implementations to stress test the code and/or the hardware. This can also be done by disabling optimizations in the code when this option is switched on. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
| | | * | | | amd-iommu: move protection domain printk to dump codeJoerg Roedel2009-05-281-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This information is only helpful for debugging. Don't print it anymore unless explicitly requested. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | * | | | amd-iommu: print ivmd information to dmesg when requestedJoerg Roedel2009-05-281-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add information about device memory mapping requirements for the IOMMU as described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | * | | | amd-iommu: print ivhd information to dmesg when requestedJoerg Roedel2009-05-281-0/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add information about devices belonging to an IOMMU as described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | * | | | amd-iommu: add dump for iommus described in ivrs tableJoerg Roedel2009-05-281-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add information about IOMMU devices described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | | * | | | amd-iommu: add amd_iommu_dump parameterJoerg Roedel2009-05-282-0/+16
| | | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This kernel parameter will be useful to get some AMD IOMMU related information in dmesg that is not necessary for the default user but may be helpful in debug situations. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | / / / amd_iommu: fix lock imbalanceJiri Slaby2009-06-031-1/+3
| |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In alloc_coherent there is an omitted unlock on the path where mapping fails. Add the unlock. [ Impact: fix lock imbalance in alloc_coherent ] Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | | | amd iommu: properly detach from protection domain on ->removeChris Wright2009-05-281-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some drivers may use the dma api during ->remove which will cause a protection domain to get reattached to a device. Delay the detach until after the driver is completely unbound. [ joro: added a little merge helper ] [ Impact: fix too early device<->domain removal ] Signed-off-by: Chris Wright <chrisw@redhat.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | | | amd-iommu: make sure only ivmd entries are parsedJoerg Roedel2009-05-281-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bug never triggered. But it should be fixed to protect against broken ACPI tables in the future. [ Impact: protect against broken ivrs acpi table ] Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | | | amd-iommu: fix the handling of device aliases in the AMD IOMMU driver.Neil Turton2009-05-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The devid parameter to set_dev_entry_from_acpi is the requester ID rather than the device ID since it is used to index the IOMMU device table. The handling of IVHD_DEV_ALIAS used to pass the device ID. This patch fixes it to pass the requester ID. [ Impact: fix setting the wrong req-id in acpi-table parsing ] Signed-off-by: Neil Turton <nturton@solarflare.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | | | amd-iommu: fix an off-by-one error in the AMD IOMMU driver.Neil Turton2009-05-281-1/+1
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The variable amd_iommu_last_bdf holds the maximum bdf of any device controlled by an IOMMU, so the number of device entries needed is amd_iommu_last_bdf+1. The function tbl_size used amd_iommu_last_bdf instead. This would be a problem if the last device were a large enough power of 2. [ Impact: fix amd_iommu_last_bdf off-by-one error ] Signed-off-by: Neil Turton <nturton@solarflare.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | | Merge commit 'v2.6.30-rc5' into core/iommuIngo Molnar2009-05-111047-22601/+57105
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: core/iommu was on an .30-rc1 base, update it to .30-rc5 to refresh. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | x86 gart: reimplement IOMMU_LEAK feature by using DMA_API_DEBUGFUJITA Tomonori2009-04-152-39/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | IOMMU_LEAK, GART's own feature, dumps the used IOMMU entries when IOMMU entries is full, which might be useful to find a bad driver that eats IOMMU entries. DMA_API_DEBUG provides the similar feature, debug_dma_dump_mappings, and it's better than GART's IOMMU_LEAK feature. GART's IOMMU_LEAK feature doesn't say who uses IOMMU entries so it's hard to find a bad driver. This patch reimplements the GART's IOMMU_LEAK feature by using DMA_API_DEBUG. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Joerg Roedel <joerg.roedel@amd.com> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <1239669799-23579-2-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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