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2014-08-06Merge tag 'pm+acpi-3.17-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI and power management updates from Rafael Wysocki: "Again, ACPICA leads the pack (47 commits), followed by cpufreq (18 commits) and system suspend/hibernation (9 commits). From the new code perspective, the ACPICA update brings ACPI 5.1 to the table, including a new device configuration object called _DSD (Device Specific Data) that will hopefully help us to operate device properties like Device Trees do (at least to some extent) and changes related to supporting ACPI on ARM. Apart from that we have hibernation changes making it use radix trees to store memory bitmaps which should speed up some operations carried out by it quite significantly. We also have some power management changes related to suspend-to-idle (the "freeze" sleep state) support and more preliminary changes needed to support ACPI on ARM (outside of ACPICA). The rest is fixes and cleanups pretty much everywhere. Specifics: - ACPICA update to upstream version 20140724. That includes ACPI 5.1 material (support for the _CCA and _DSD predefined names, changes related to the DMAR and PCCT tables and ARM support among other things) and cleanups related to using ACPICA's header files. A major part of it is related to acpidump and the core code used by that utility. Changes from Bob Moore, David E Box, Lv Zheng, Sascha Wildner, Tomasz Nowicki, Hanjun Guo. - Radix trees for memory bitmaps used by the hibernation core from Joerg Roedel. - Support for waking up the system from suspend-to-idle (also known as the "freeze" sleep state) using ACPI-based PCI wakeup signaling (Rafael J Wysocki). - Fixes for issues related to ACPI button events (Rafael J Wysocki). - New device ID for an ACPI-enumerated device included into the Wildcat Point PCH from Jie Yang. - ACPI video updates related to backlight handling from Hans de Goede and Linus Torvalds. - Preliminary changes needed to support ACPI on ARM from Hanjun Guo and Graeme Gregory. - ACPI PNP core cleanups from Arjun Sreedharan and Zhang Rui. - Cleanups related to ACPI_COMPANION() and ACPI_HANDLE() macros (Rafael J Wysocki). - ACPI-based device hotplug cleanups from Wei Yongjun and Rafael J Wysocki. - Cleanups and improvements related to system suspend from Lan Tianyu, Randy Dunlap and Rafael J Wysocki. - ACPI battery cleanup from Wei Yongjun. - cpufreq core fixes from Viresh Kumar. - Elimination of a deadband effect from the cpufreq ondemand governor and intel_pstate driver cleanups from Stratos Karafotis. - 350MHz CPU support for the powernow-k6 cpufreq driver from Mikulas Patocka. - Fix for the imx6 cpufreq driver from Anson Huang. - cpuidle core and governor cleanups from Daniel Lezcano, Sandeep Tripathy and Mohammad Merajul Islam Molla. - Build fix for the big_little cpuidle driver from Sachin Kamat. - Configuration fix for the Operation Performance Points (OPP) framework from Mark Brown. - APM cleanup from Jean Delvare. - cpupower utility fixes and cleanups from Peter Senna Tschudin, Andrey Utkin, Himangi Saraogi, Rickard Strandqvist, Thomas Renninger" * tag 'pm+acpi-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (118 commits) ACPI / LPSS: add LPSS device for Wildcat Point PCH ACPI / PNP: Replace faulty is_hex_digit() by isxdigit() ACPICA: Update version to 20140724. ACPICA: ACPI 5.1: Update for PCCT table changes. ACPICA/ARM: ACPI 5.1: Update for GTDT table changes. ACPICA/ARM: ACPI 5.1: Update for MADT changes. ACPICA/ARM: ACPI 5.1: Update for FADT changes. ACPICA: ACPI 5.1: Support for the _CCA predifined name. ACPICA: ACPI 5.1: New notify value for System Affinity Update. ACPICA: ACPI 5.1: Support for the _DSD predefined name. ACPICA: Debug object: Add current value of Timer() to debug line prefix. ACPICA: acpihelp: Add UUID support, restructure some existing files. ACPICA: Utilities: Fix local printf issue. ACPICA: Tables: Update for DMAR table changes. ACPICA: Remove some extraneous printf arguments. ACPICA: Update for comments/formatting. No functional changes. ACPICA: Disassembler: Add support for the ToUUID opererator (macro). ACPICA: Remove a redundant cast to acpi_size for ACPI_OFFSET() macro. ACPICA: Work around an ancient GCC bug. ACPI / processor: Make it possible to get local x2apic id via _MAT ...
2014-08-05Merge branch 'acpica'Rafael J. Wysocki
* acpica: ACPICA: Update version to 20140724. ACPICA: ACPI 5.1: Update for PCCT table changes. ACPICA/ARM: ACPI 5.1: Update for GTDT table changes. ACPICA/ARM: ACPI 5.1: Update for MADT changes. ACPICA/ARM: ACPI 5.1: Update for FADT changes. ACPICA: ACPI 5.1: Support for the _CCA predifined name. ACPICA: ACPI 5.1: New notify value for System Affinity Update. ACPICA: ACPI 5.1: Support for the _DSD predefined name. ACPICA: Debug object: Add current value of Timer() to debug line prefix. ACPICA: acpihelp: Add UUID support, restructure some existing files. ACPICA: Utilities: Fix local printf issue. ACPICA: Tables: Update for DMAR table changes. ACPICA: Remove some extraneous printf arguments. ACPICA: Update for comments/formatting. No functional changes. ACPICA: Disassembler: Add support for the ToUUID opererator (macro). ACPICA: Remove a redundant cast to acpi_size for ACPI_OFFSET() macro. ACPICA: Work around an ancient GCC bug.
2014-07-31Merge branches 'x86/vt-d', 'x86/amd', 'arm/omap', 'ppc/pamu', 'arm/smmu', ↵Joerg Roedel
'arm/exynos' and 'core' into next
2014-07-31iommu/vt-d: Fix race setting IRQ CPU affinity while freeing IRQGreg Edwards
A user process setting the CPU affinity of an IRQ for a KVM direct-assigned device via /proc/irq/<IRQ#>/smp_affinity can race with the IRQ being released by QEMU, resulting in a NULL iommu pointer dereference in get_irte(), causing this crash: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff8190a652>] intel_ioapic_set_affinity+0x82/0x1b0 PGD 99172e067 PUD 1026979067 PMD 0 Oops: 0000 [#1] SMP Modules linked in: CPU: 1 PID: 3354 Comm: affin Not tainted 3.16.0-rc7-00007-g31dab71 #1 Hardware name: Supermicro SYS-F617R2-RT+/X9DRFR, BIOS 3.0a 01/29/2014 task: ffff881025b0e720 ti: ffff88099173c000 task.ti: ffff88099173c000 RIP: 0010:[<ffffffff8190a652>] [<ffffffff8190a652>] intel_ioapic_set_affinity+0x82/0x1b0 RSP: 0018:ffff88099173fdb0 EFLAGS: 00010046 RAX: 0000000000000082 RBX: ffff880a36294600 RCX: 0000000000000082 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8266af00 RBP: ffff88099173fdf8 R08: 0000000000000000 R09: ffff88103ec00490 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88099173fe90 R13: 000000000000005f R14: ffff880faa38fe80 R15: ffff880faa38fe80 FS: 00007f7161f05740(0000) GS:ffff88107fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000090 CR3: 000000099140d000 CR4: 00000000001427e0 Stack: ffffffff81c44740 ffff88099173fdc8 ffffffff00000000 00000000c991fd3b ffff880a36294600 ffff88099173fe90 ffff88099173fe90 0000000000000000 0000000000000286 ffff88099173fe08 ffffffff8190aac5 ffff88099173fe28 Call Trace: [<ffffffff8190aac5>] set_remapped_irq_affinity+0x25/0x40 [<ffffffff811322dc>] irq_do_set_affinity+0x1c/0x50 [<ffffffff81132458>] irq_set_affinity_locked+0x98/0xd0 [<ffffffff811324d6>] __irq_set_affinity+0x46/0x70 [<ffffffff811362dc>] write_irq_affinity.isra.6+0xdc/0x100 [<ffffffff8113631c>] irq_affinity_list_proc_write+0x1c/0x20 [<ffffffff8129f30d>] proc_reg_write+0x3d/0x80 [<ffffffff812384a7>] vfs_write+0xb7/0x1f0 [<ffffffff81243619>] ? putname+0x29/0x40 [<ffffffff812390c5>] SyS_write+0x55/0xd0 [<ffffffff81adc729>] system_call_fastpath+0x16/0x1b Code: ff 48 85 d2 74 68 4c 8b 7a 30 4d 85 ff 74 5f 48 c7 c7 00 af 66 82 e8 9e 1b 1d 00 49 8b 57 20 41 0f b7 77 28 48 c7 c7 00 af 66 82 <48> 8b 8a 90 00 00 00 41 0f b7 57 2a 01 f2 48 89 c6 48 63 d2 48 RIP [<ffffffff8190a652>] intel_ioapic_set_affinity+0x82/0x1b0 RSP <ffff88099173fdb0> CR2: 0000000000000090 Signed-off-by: Greg Edwards <gedwards@ddn.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-31ACPICA: Tables: Update for DMAR table changes.Bob Moore
Update table compiler and disassembler for new DMAR fields introduced in Sept. 2013. Note that Linux DMAR users need to be updated after applying this change. [zetalog: changing drivers/iommu/dmar.c accordingly] Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-07-30iommu/amd: Fix 2 typos in commentsJoerg Roedel
amd_iommu_pasid_bind -> amd_iommu_bind_pasid Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-30iommu/amd: Fix device_state reference countingJoerg Roedel
The references to the device state are not dropped everywhere. This might cause a dead-lock in amd_iommu_free_device(). Fix it. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <oded.gabbay@amd.com>
2014-07-30iommu/amd: Remove change_pte mmu_notifier call-backJoerg Roedel
All calls to this call-back are wrapped with mmu_notifer_invalidate_range_start()/end(), making this notifier pretty useless, so remove it. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <oded.gabbay@amd.com>
2014-07-30iommu/amd: Don't set pasid_state->mm to NULL in unbind_pasidJoerg Roedel
With calling te mmu_notifier_register function we hold a reference to the mm_struct that needs to be released in mmu_notifier_unregister. This is true even if the notifier was already unregistered from exit_mmap and the .release call-back has already run. So make sure we call mmu_notifier_unregister unconditionally in amd_iommu_unbind_pasid. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <oded.gabbay@amd.com>
2014-07-29iommu/exynos: Select ARM_DMA_USE_IOMMUTushar Behera
For IOMMU to use on Exynos platforms, we need to enable ARM_DMA_USE_IOMMU. It would be better to select it by default when EXYNOS_IOMMU is enabled. Signed-off-by: Tushar Behera <tushar.b@samsung.com> Reviewed-by: Sachin Kamat <sachin.kamat@samsung.com> Reviewed-by: Cho KyongHo <pullip.cho@samsung.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-29iommu/vt-d: Exclude devices using RMRRs from IOMMU API domainsAlex Williamson
The user of the IOMMU API domain expects to have full control of the IOVA space for the domain. RMRRs are fundamentally incompatible with that idea. We can neither map the RMRR into the IOMMU API domain, nor can we guarantee that the device won't continue DMA with the area described by the RMRR as part of the new domain. Therefore we must prevent such devices from being used by the IOMMU API. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-29iommu/omap: Remove virtual memory managerLaurent Pinchart
The OMAP3 ISP driver was the only user of the OMAP IOVMM API. Now that is has been ported to the DMA API, remove the unused virtual memory manager. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Fix issue in computing domain's iommu_snooping flagJiang Liu
IOMMU units may dynamically attached to/detached from domains, so we should scan all active IOMMU units when computing iommu_snooping flag for a domain instead of only scanning IOMMU units associated with the domain. Also check snooping and superpage capabilities when hot-adding DMAR units. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Introduce helper function iova_size() to improve code readabilityJiang Liu
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Introduce helper domain_pfn_within_range() to simplify codeJiang Liu
Introduce helper function domain_pfn_within_range() to simplify code and improve readability. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Simplify intel_unmap_sg() and kill duplicated codeJiang Liu
Introduce intel_unmap() to reduce duplicated code in intel_unmap_sg() and intel_unmap_page(). Also let dma_pte_free_pagetable() to call dma_pte_clear_range() directly, so caller only needs to call dma_pte_free_pagetable(). Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Change iommu_enable/disable_translation to return voidJiang Liu
Simplify error handling path by changing iommu_{enable|disable}_translation to return void. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Avoid freeing virtual machine domain in free_dmar_iommu()Jiang Liu
Virtual machine domains are created by intel_iommu_domain_init() and should be destroyed by intel_iommu_domain_destroy(). So avoid freeing virtual machine domain data structure in free_dmar_iommu() when doamin->iommu_count reaches zero, otherwise it may cause invalid memory access because the IOMMU framework still holds references to the domain structure. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Fix possible invalid memory access caused by free_dmar_iommu()Jiang Liu
Static identity and virtual machine domains may be cached in iommu->domain_ids array after corresponding IOMMUs have been removed from domain->iommu_bmp. So we should check domain->iommu_bmp before decreasing domain->iommu_count in function free_dmar_iommu(), otherwise it may cause free of inuse domain data structure. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Allocate dynamic domain id for virtual domains onlyJiang Liu
Check the same domain id is allocated for si_domain on each IOMMU, otherwise the IOTLB flush for si_domain will fail. Now the rules to allocate and manage domain id are: 1) For normal and static identity domains, domain id is allocated when creating domain structure. And this id will be written into context entry. 2) For virtual machine domain, a virtual id is allocated when creating domain. And when binding virtual machine domain to an iommu, a real domain id is allocated on demand and this domain id will be written into context entry. So domain->id for virtual machine domain may be different from the domain id written into context entry(used by hardware). Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Introduce helper functions to make code symmetric for readabilityJiang Liu
Introduce domain_attach_iommu()/domain_detach_iommu() and refine iommu_attach_domain()/iommu_detach_domain() to make code symmetric and improve readability. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Introduce helper functions to improve code readabilityJiang Liu
Introduce domain_type_is_vm() and domain_type_is_vm_or_si() to improve code readability. Also kill useless macro DOMAIN_FLAG_P2P_MULTIPLE_DEVICES. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Use correct domain id to flush virtual machine domainsJiang Liu
For virtual machine domains, domain->id is a virtual id, and the real domain id written into context entry is dynamically allocated. So use the real domain id instead of domain->id when flushing iotlbs for virtual machine domains. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23iommu/vt-d: Match segment number when searching for dev_iotlb capable devicesJiang Liu
For virtual machine and static identity domains, there may be devices from different PCI segments associated with the same domain. So function iommu_support_dev_iotlb() should also match PCI segment number (iommu unit) when searching for dev_iotlb capable devices. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-23Merge branch 'core' into x86/vt-dJoerg Roedel
Conflicts: drivers/iommu/intel-iommu.c
2014-07-10iommu/amd: Don't call the inv_ctx_cb when pasid is not set upJoerg Roedel
On the error path of amd_iommu_bind_pasid() we call mmu_notifier_unregister() for cleanup. This calls mn_release() which calls the users inv_ctx_cb function if one is available. Since the pasid is not set up yet there is nothing the user can to tear down in this call-back. So don't call inv_ctx_cb on the error path of amd_iommu_unbind_pasid() and make life of the users simpler. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
2014-07-10iommu/amd: Don't hold a reference to task_structJoerg Roedel
Since we are only caring about the lifetime of the mm_struct and not the task we can't safely keep a reference to it. The reference is also not needed anymore, so remove that code entirely. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
2014-07-10iommu/amd: Don't hold a reference to mm_structJoerg Roedel
With mmu_notifiers we don't need to hold a reference to the mm_struct during the time the pasid is bound to a device. We can rely on the .mn_release call back to inform us when the mm_struct goes away. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
2014-07-10iommu/amd: Add pasid_state->invalid flagJoerg Roedel
This is used to signal the ppr_notifer function that no more faults should be processes on this pasid_state. This way we can keep the pasid_state safely in the state-table so that it can be freed in the amd_iommu_unbind_pasid() function. This allows us to not hold a reference to the mm_struct during the whole pasid-binding-time. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
2014-07-10iommu/amd: Drop pasid_state reference in ppr_notifer error pathJoerg Roedel
In case we are not able to allocate a fault structure a reference to the pasid_state will be leaked. Fix that by dropping the reference in the error path in case we hold one. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
2014-07-10iommu/amd: Get rid of __unbind_pasidJoerg Roedel
Unbind_pasid is only called from mn_release which already has the pasid_state. Use this to simplify the unbind_pasid path and get rid of __unbind_pasid. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
2014-07-10iommu/amd: Don't free pasid_state in mn_release pathJoerg Roedel
The mmu_notifier state is part of pasid_state so it can't be freed in the mn_release path. Free the pasid_state after mmu_notifer_unregister has completed. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
2014-07-10iommu/amd: Don't call mmu_notifer_unregister in __unbind_pasidJoerg Roedel
This function is called only in the mn_release() path, so there is no need to unregister the mmu_notifer here. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
2014-07-10iommu/amd: Fix typo in amd_iommu_v2 driverJoerg Roedel
Fix typo in a comment. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-10iommu/amd: Drop oprofile dependencyBorislav Petkov
a40d4c67d7de ("iommu/amd: Implement mmu_notifier_release call-back") removed the oprofile task_exit notifier hack^Wusage but forgot to readjust the Kconfig dependency. Fix that. Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-10Merge branch 'for-joerg/arm-smmu/updates' of ↵Joerg Roedel
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu
2014-07-09iommu/amd: Moving PPR fault flags macros definitionsAlexey Skidanov
Any kernel source registering the invalid PPR calback may include the header file with PPR fault flags macros definitions. Thus we move them to include/linux/amd-iommu.h Signed-off-by: Alexey Skidanov <Alexey.Skidanov@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-09iommu/amd: Fix for pasid initializationAlexey Skidanov
The pasid wasn't properly initialized before caling to invalid PPR calback Signed-off-by: Alexey Skidanov <Alexey.Skidanov@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-09iommu/arm-smmu: fix some checkpatch issuesMitchel Humpherys
Fix some issues reported by checkpatch.pl. Mostly whitespace, but also includes min=>min_t, kzalloc=>kcalloc, and kmalloc=>kmalloc_array. The only issue I'm leaving alone is: arm-smmu.c:853: WARNING: line over 80 characters #853: FILE: arm-smmu.c:853: + (MAIR_ATTR_WBRWA << MAIR_ATTR_SHIFT(MAIR_ATTR_IDX_CACHE)) | since it seems to be a case where "exceeding 80 columns significantly increases readability and does not hide information." (Documentation/CodingStyle). Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-07-07iommu: Fix compile error in iommu-sysfs.cJoerg Roedel
Add missing include of <linux/slab.h>. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07iommu: Constify struct iommu_opsThierry Reding
This structure is read-only data and should never be modified. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07iommu/fsl: Fix the error condition during iommu groupVarun Sethi
Earlier PTR_ERR was being returned even if group was set to null. Now, we explicitly set an ERR_PTR value in case the group pointer is NULL. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07iommu/fsl: Fix the device domain attach condition.Varun Sethi
Store the domain information for the device, only if it's not already attached to a domain. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07iommu/fsl: Fix PAMU window size check.Varun Sethi
is_power_of_2 requires an unsigned long parameter which would lead to truncation of 64 bit values on 32 bit architectures. __ffs also expects an unsigned long parameter thus won't work for 64 bit values on 32 bit architectures. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Tested-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/arm-smmu: fix capability checking prior to device attachWill Deacon
If somebody attempts to check the capability of an IOMMU domain prior to device attach, then we'll try to dereference a NULL SMMU pointer through the SMMU domain (since we can't determine the actual SMMU instance until we have a device attached). This patch fixes the capability check so that non-global features are reported as being absent when no device is attached to the domain. Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-07-04iommu/fsl: Add void declarations in zero-arg functions.Chi Pham
Added explicit void declarations to zero-argument function headers. The following coccinelle script was used: @addvoid@ identifier f; @@ f( + void ) { ... } Signed-off-by: Chi Pham <fempsci@gmail.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/fsl_pamu: Remove unnecessary null test before kfreeFabian Frederick
Fix checkpatch warning: WARNING: kfree(NULL) is safe this check is probably not required Cc: Joerg Roedel <joro@8bytes.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: iommu@lists.linux-foundation.org Cc: devicetree@vger.kernel.org Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/omap: Use PAGE_ALIGNED instead of IS_ALIGNED(PAGE_SIZE)Fabian Frederick
use mm.h definition Cc: Joerg Roedel <joro@8bytes.org> Cc: iommu@lists.linux-foundation.org Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/amd: Add sysfs supportAlex Williamson
AMD-Vi support for IOMMU sysfs. This allows us to associate devices with a specific IOMMU device and examine the capabilities and features of that IOMMU. The AMD IOMMU is hosted on and actual PCI device, so we make that device the parent for the IOMMU class device. This initial implementaiton exposes only the capability header and extended features register for the IOMMU. # find /sys | grep ivhd /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:00.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:02.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:04.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:09.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:11.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:12.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:12.2 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:13.0 ... /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/power /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/power/control ... /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/device /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/subsystem /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/amd-iommu /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/amd-iommu/cap /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/amd-iommu/features /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/uevent /sys/class/iommu/ivhd0 Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/vt-d: Make use of IOMMU sysfs supportAlex Williamson
Register our DRHD IOMMUs, cross link devices, and provide a base set of attributes for the IOMMU. Note that IRQ remapping support parses the DMAR table very early in boot, well before the iommu_class can reasonably be setup, so our registration is split between intel_iommu_init(), which occurs later, and alloc_iommu(), which typically occurs much earlier, but may happen at any time later with IOMMU hot-add support. On a typical desktop system, this provides the following (pruned): $ find /sys | grep dmar /sys/devices/virtual/iommu/dmar0 /sys/devices/virtual/iommu/dmar0/devices /sys/devices/virtual/iommu/dmar0/devices/0000:00:02.0 /sys/devices/virtual/iommu/dmar0/intel-iommu /sys/devices/virtual/iommu/dmar0/intel-iommu/cap /sys/devices/virtual/iommu/dmar0/intel-iommu/ecap /sys/devices/virtual/iommu/dmar0/intel-iommu/address /sys/devices/virtual/iommu/dmar0/intel-iommu/version /sys/devices/virtual/iommu/dmar1 /sys/devices/virtual/iommu/dmar1/devices /sys/devices/virtual/iommu/dmar1/devices/0000:00:00.0 /sys/devices/virtual/iommu/dmar1/devices/0000:00:01.0 /sys/devices/virtual/iommu/dmar1/devices/0000:00:16.0 /sys/devices/virtual/iommu/dmar1/devices/0000:00:1a.0 /sys/devices/virtual/iommu/dmar1/devices/0000:00:1b.0 /sys/devices/virtual/iommu/dmar1/devices/0000:00:1c.0 ... /sys/devices/virtual/iommu/dmar1/intel-iommu /sys/devices/virtual/iommu/dmar1/intel-iommu/cap /sys/devices/virtual/iommu/dmar1/intel-iommu/ecap /sys/devices/virtual/iommu/dmar1/intel-iommu/address /sys/devices/virtual/iommu/dmar1/intel-iommu/version /sys/class/iommu/dmar0 /sys/class/iommu/dmar1 (devices also link back to the dmar units) This makes address, version, capabilities, and extended capabilities available, just like printed on boot. I've tried not to duplicate data that can be found in the DMAR table, with the exception of the address, which provides an easy way to associate the sysfs device with a DRHD entry in the DMAR. It's tempting to add scopes and RMRR data here, but the full DMAR table is already exposed under /sys/firmware/ and therefore already provides a way for userspace to learn such details. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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