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path: root/drivers/iommu/amd_iommu_init.c
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2018-12-20Merge branches 'iommu/fixes', 'arm/renesas', 'arm/mediatek', 'arm/tegra', ↵Joerg Roedel1-31/+33
'arm/omap', 'arm/smmu', 'x86/vt-d', 'x86/amd' and 'core' into next
2018-11-28iommu/amd: Use pr_fmt()Joerg Roedel1-31/+33
Make use of pr_fmt instead of having the 'AMD-Vi' prefix added manually at every printk() call. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-11-12amd/iommu: Fix Guest Virtual APIC Log Tail Address RegisterFilippo Sironi1-1/+2
This register should have been programmed with the physical address of the memory location containing the shadow tail pointer for the guest virtual APIC log instead of the base address. Fixes: 8bda0cfbdc1a ('iommu/amd: Detect and initialize guest vAPIC log') Signed-off-by: Filippo Sironi <sironi@amazon.de> Signed-off-by: Wei Wang <wawei@amazon.de> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-10-26Merge tag 'iommu-updates-v4.20' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU updates from Joerg Roedel: - Debugfs support for the Intel VT-d driver. When enabled, it now also exposes some of its internal data structures to user-space for debugging purposes. - ARM-SMMU driver now uses the generic deferred flushing and fast-path iova allocation code. This is expected to be a major performance improvement, as this allocation path scales a lot better. - Support for r8a7744 in the Renesas iommu driver - Couple of minor fixes and improvements all over the place * tag 'iommu-updates-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (39 commits) iommu/arm-smmu-v3: Remove unnecessary wrapper function iommu/arm-smmu-v3: Add SPDX header iommu/amd: Add default branch in amd_iommu_capable() dt-bindings: iommu: ipmmu-vmsa: Add r8a7744 support iommu/amd: Move iommu_init_pci() to .init section iommu/arm-smmu: Support non-strict mode iommu/io-pgtable-arm-v7s: Add support for non-strict mode iommu/arm-smmu-v3: Add support for non-strict mode iommu/io-pgtable-arm: Add support for non-strict mode iommu: Add "iommu.strict" command line option iommu/dma: Add support for non-strict mode iommu/arm-smmu: Ensure that page-table updates are visible before TLBI iommu/arm-smmu-v3: Implement flush_iotlb_all hook iommu/arm-smmu-v3: Avoid back-to-back CMD_SYNC operations iommu/arm-smmu-v3: Fix unexpected CMD_SYNC timeout iommu/io-pgtable-arm: Fix race handling in split_blk_unmap() iommu/arm-smmu-v3: Fix a couple of minor comment typos iommu: Fix a typo iommu: Remove .domain_{get,set}_windows iommu: Tidy up window attributes ...
2018-10-06iommu/amd: Remap the IOMMU device table with the memory encryption mask for ↵Lianbo Jiang1-2/+12
kdump The kdump kernel copies the IOMMU device table from the old device table which is encrypted when SME is enabled in the first kernel. So remap the old device table with the memory encryption mask in the kdump kernel. [ bp: Massage commit message. ] Signed-off-by: Lianbo Jiang <lijiang@redhat.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Acked-by: Joerg Roedel <jroedel@suse.de> Cc: kexec@lists.infradead.org Cc: tglx@linutronix.de Cc: mingo@redhat.com Cc: hpa@zytor.com Cc: akpm@linux-foundation.org Cc: dan.j.williams@intel.com Cc: bhelgaas@google.com Cc: baiyaowei@cmss.chinamobile.com Cc: tiwai@suse.de Cc: brijesh.singh@amd.com Cc: dyoung@redhat.com Cc: bhe@redhat.com Link: https://lkml.kernel.org/r/20180930031033.22110-4-lijiang@redhat.com
2018-10-05iommu/amd: Move iommu_init_pci() to .init sectionJoerg Roedel1-1/+1
The function is only called from another __init function, so it should be moved to .init too. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-08-08Merge branches 'arm/shmobile', 'arm/renesas', 'arm/msm', 'arm/smmu', ↵Joerg Roedel1-17/+40
'arm/omap', 'x86/amd', 'x86/vt-d' and 'core' into next
2018-07-06iommu/amd: Add support for IOMMU XT modeSuravee Suthikulpanit1-2/+23
The AMD IOMMU XT mode enables interrupt remapping with 32-bit destination APIC ID, which is required for x2APIC. The feature is available when the XTSup bit is set in the IOMMU Extended Feature register and/or the IVHD Type 10h IOMMU Feature Reporting field. For more information, please see section "IOMMU x2APIC Support" of the AMD I/O Virtualization Technology (IOMMU) Specification. Cc: Joerg Roedel <jroedel@suse.de> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-07-06iommu/amd: Add support for higher 64-bit IOMMU Control RegisterSuravee Suthikulpanit1-13/+13
Currently, the driver only supports lower 32-bit of IOMMU Control register. However, newer AMD IOMMU specification has extended this register to 64-bit. Therefore, replace the accessing API with the 64-bit version. Cc: Joerg Roedel <jroedel@suse.de> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-07-06iommu/amd: Add basic debugfs infrastructure for AMD IOMMUGary R Hook1-2/+4
Implement a skeleton framework for debugfs support in the AMD IOMMU. Add an AMD-specific Kconfig boolean that depends upon general enablement of DebugFS in the IOMMU. Signed-off-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-02-13iommu/amd: Use raw locks on atomic context pathsScott Wood1-1/+1
Several functions in this driver are called from atomic context, and thus raw locks must be used in order to be safe on PREEMPT_RT. This includes paths that must wait for command completion, which is a potential PREEMPT_RT latency concern but not easily avoidable. Signed-off-by: Scott Wood <swood@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-01-11iommu/amd: Deprecate pci_get_bus_and_slot()Sinan Kaya1-4/+5
pci_get_bus_and_slot() is restrictive such that it assumes domain=0 as where a PCI device is present. This restricts the device drivers to be reused for other domain numbers. Getting ready to remove pci_get_bus_and_slot() function in favor of pci_get_domain_bus_and_slot(). Hard-code the domain number as 0 for the AMD IOMMU driver. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Signed-off-by: Bjorn Helgaas <helgaas@kernel.org> Reviewed-by: Gary R Hook <gary.hook@amd.com> Acked-by: Joerg Roedel <jroedel@suse.de>
2017-09-27iommu/amd: pr_err() strings should end with newlinesArvind Yadav1-4/+4
pr_err() messages should end with a new-line to avoid other messages being concatenated. So replace '/n' with '\n'. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Fixes: 45a01c42933b ('iommu/amd: Add function copy_dev_tables()') Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-09-09Merge tag 'iommu-updates-v4.14' of ↵Linus Torvalds1-24/+199
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU updates from Joerg Roedel: "Slightly more changes than usual this time: - KDump Kernel IOMMU take-over code for AMD IOMMU. The code now tries to preserve the mappings of the kernel so that master aborts for devices are avoided. Master aborts cause some devices to fail in the kdump kernel, so this code makes the dump more likely to succeed when AMD IOMMU is enabled. - common flush queue implementation for IOVA code users. The code is still optional, but AMD and Intel IOMMU drivers had their own implementation which is now unified. - finish support for iommu-groups. All drivers implement this feature now so that IOMMU core code can rely on it. - finish support for 'struct iommu_device' in iommu drivers. All drivers now use the interface. - new functions in the IOMMU-API for explicit IO/TLB flushing. This will help to reduce the number of IO/TLB flushes when IOMMU drivers support this interface. - support for mt2712 in the Mediatek IOMMU driver - new IOMMU driver for QCOM hardware - system PM support for ARM-SMMU - shutdown method for ARM-SMMU-v3 - some constification patches - various other small improvements and fixes" * tag 'iommu-updates-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (87 commits) iommu/vt-d: Don't be too aggressive when clearing one context entry iommu: Introduce Interface for IOMMU TLB Flushing iommu/s390: Constify iommu_ops iommu/vt-d: Avoid calling virt_to_phys() on null pointer iommu/vt-d: IOMMU Page Request needs to check if address is canonical. arm/tegra: Call bus_set_iommu() after iommu_device_register() iommu/exynos: Constify iommu_ops iommu/ipmmu-vmsa: Make ipmmu_gather_ops const iommu/ipmmu-vmsa: Rereserving a free context before setting up a pagetable iommu/amd: Rename a few flush functions iommu/amd: Check if domain is NULL in get_domain() and return -EBUSY iommu/mediatek: Fix a build warning of BIT(32) in ARM iommu/mediatek: Fix a build fail of m4u_type iommu: qcom: annotate PM functions as __maybe_unused iommu/pamu: Fix PAMU boot crash memory: mtk-smi: Degrade SMI init to module_init iommu/mediatek: Enlarge the validate PA range for 4GB mode iommu/mediatek: Disable iommu clock when system suspend iommu/mediatek: Move pgtable allocation into domain_alloc iommu/mediatek: Merge 2 M4U HWs into one iommu domain ...
2017-08-26Merge branch 'linus' into x86/mm to pick up fixes and to fix conflictsIngo Molnar1-1/+1
Conflicts: arch/x86/kernel/head64.c arch/x86/mm/mmap.c Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-08-19iommu/amd: Fix section mismatch warningJoerg Roedel1-1/+1
The variable amd_iommu_pre_enabled is used in non-init code-paths, so remove the __initdata annotation. Reported-by: kbuild test robot <fengguang.wu@intel.com> Fixes: 3ac3e5ee5ed56 ('iommu/amd: Copy old trans table from old kernel') Acked-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-19iommu/amd: Fix compiler warning in copy_device_table()Joerg Roedel1-1/+1
This was reported by the kbuild bot. The condition in which entry would be used uninitialized can not happen, because when there is no iommu this function would never be called. But its no fast-path, so fix the warning anyway. Reported-by: kbuild test robot <fengguang.wu@intel.com> Acked-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/amd: Disable iommu only if amd_iommu=off is specifiedBaoquan He1-1/+2
It's ok to disable iommu early in normal kernel or in kdump kernel when amd_iommu=off is specified. While we should not disable it in kdump kernel when on-flight dma is still on-going. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/amd: Don't copy GCR3 table root pointerBaoquan He1-0/+12
When iommu is pre_enabled in kdump kernel, if a device is set up with guest translations (DTE.GV=1), then don't copy GCR3 table root pointer but move the device over to an empty guest-cr3 table and handle the faults in the PPR log (which answer them with INVALID). After all these PPR faults are recoverable for the device and we should not allow the device to change old-kernels data when we don't have to. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/amd: Allocate memory below 4G for dev table if translation pre-enabledBaoquan He1-2/+7
AMD pointed out it's unsafe to update the device-table while iommu is enabled. It turns out that device-table pointer update is split up into two 32bit writes in the IOMMU hardware. So updating it while the IOMMU is enabled could have some nasty side effects. The safe way to work around this is to always allocate the device-table below 4G, including the old device-table in normal kernel and the device-table used for copying the content of the old device-table in kdump kernel. Meanwhile we need check if the address of old device-table is above 4G because it might has been touched accidentally in corrupted 1st kernel. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/amd: Do sanity check for address translation and irq remap of old dev ↵Baoquan He1-3/+20
table entry Firstly split the dev table entry copy into address translation part and irq remapping part. Because these two parts could be enabled independently. Secondly do sanity check for address translation and irq remap of old dev table entry separately. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/amd: Copy old trans table from old kernelBaoquan He1-8/+51
Here several things need be done: - If iommu is pre-enabled in a normal kernel, just disable it and print warning. - If any one of IOMMUs is not pre-enabled in kdump kernel, just continue as it does in normal kernel. - If failed to copy dev table of old kernel, continue to proceed as it does in normal kernel. - Only if all IOMMUs are pre-enabled and copy dev table is done well, free the dev table allocated in early_amd_iommu_init() and make amd_iommu_dev_table point to the copied one. - Disable and Re-enable event/cmd buffer, install the copied DTE table to reg, and detect and enable guest vapic. - Flush all caches Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/amd: Add function copy_dev_tables()Baoquan He1-0/+62
Add function copy_dev_tables to copy the old DEV table entries of the panicked kernel to the new allocated device table. Since all iommus share the same device table the copy only need be done one time. Here add a new global old_dev_tbl_cpy to point to the newly allocated device table which the content of old device table will be copied to. Besides, we also need to: - Check whether all IOMMUs actually use the same device table with the same size - Verify that the size of the old device table is the expected size. - Reserve the old domain id occupied in 1st kernel to avoid touching the old io-page tables. Then on-flight DMA can continue looking it up. And also define MACRO DEV_DOMID_MASK to replace magic number 0xffffULL, it can be reused in copy_dev_tables(). Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15Revert "iommu/amd: Suppress IO_PAGE_FAULTs in kdump kernel"Baoquan He1-9/+0
This reverts commit 54bd63570484167cb13edf81e31fff107b879981. We still need the IO_PAGE_FAULT message to warn error after the issue of on-flight dma in kdump kernel is fixed. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/amd: Add several helper functionsBaoquan He1-11/+31
Move single iommu enabling codes into a wrapper function early_enable_iommu(). This can make later kdump change easier. And also add iommu_disable_command_buffer and iommu_disable_event_buffer for later usage. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/amd: Detect pre enabled translationBaoquan He1-0/+24
Add functions to check whether translation is already enabled in IOMMU. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-07-26iommu/amd: Fix schedule-while-atomic BUG in initialization codeJoerg Roedel1-1/+1
The register_syscore_ops() function takes a mutex and might sleep. In the IOMMU initialization code it is invoked during irq-remapping setup already, where irqs are disabled. This causes a schedule-while-atomic bug: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:747 in_atomic(): 0, irqs_disabled(): 1, pid: 1, name: swapper/0 no locks held by swapper/0/1. irq event stamp: 304 hardirqs last enabled at (303): [<ffffffff818a87b6>] _raw_spin_unlock_irqrestore+0x36/0x60 hardirqs last disabled at (304): [<ffffffff8235d440>] enable_IR_x2apic+0x79/0x196 softirqs last enabled at (36): [<ffffffff818ae75f>] __do_softirq+0x35f/0x4ec softirqs last disabled at (31): [<ffffffff810c1955>] irq_exit+0x105/0x120 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.0-rc2.1.el7a.test.x86_64.debug #1 Hardware name: PowerEdge C6145 /040N24, BIOS 3.5.0 10/28/2014 Call Trace: dump_stack+0x85/0xca ___might_sleep+0x22a/0x260 __might_sleep+0x4a/0x80 __mutex_lock+0x58/0x960 ? iommu_completion_wait.part.17+0xb5/0x160 ? register_syscore_ops+0x1d/0x70 ? iommu_flush_all_caches+0x120/0x150 mutex_lock_nested+0x1b/0x20 register_syscore_ops+0x1d/0x70 state_next+0x119/0x910 iommu_go_to_state+0x29/0x30 amd_iommu_enable+0x13/0x23 Fix it by moving the register_syscore_ops() call to the next initialization step, which runs with irqs enabled. Reported-by: Artem Savkov <asavkov@redhat.com> Tested-by: Artem Savkov <asavkov@redhat.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Fixes: 2c0ae1720c09 ('iommu/amd: Convert iommu initialization to state machine') Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-07-18iommu/amd: Allow the AMD IOMMU to work with memory encryptionTom Lendacky1-6/+28
The IOMMU is programmed with physical addresses for the various tables and buffers that are used to communicate between the device and the driver. When the driver allocates this memory it is encrypted. In order for the IOMMU to access the memory as encrypted the encryption mask needs to be included in these physical addresses during configuration. The PTE entries created by the IOMMU should also include the encryption mask so that when the device behind the IOMMU performs a DMA, the DMA will be performed to encrypted memory. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Acked-by: Joerg Roedel <jroedel@suse.de> Cc: <iommu@lists.linux-foundation.org> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/3053631ea25ba8b1601c351cb7c541c496f6d9bc.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-22iommu/amd: Remove amd_iommu_disabled check from amd_iommu_detect()Joerg Roedel1-3/+0
This check needs to happens later now, when all previously enabled IOMMUs have been disabled. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-22iommu/amd: Free IOMMU resources when disabled on command lineJoerg Roedel1-0/+7
After we made sure that all IOMMUs have been disabled we need to make sure that all resources we allocated are released again. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-22iommu/amd: Set global pointers to NULL after freeing themJoerg Roedel1-0/+5
Avoid any tries to double-free these pointers. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-22iommu/amd: Check for error states first in iommu_go_to_state()Joerg Roedel1-2/+2
Check if we are in an error state already before calling into state_next(). Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-22iommu/amd: Add new init-state IOMMU_CMDLINE_DISABLEDJoerg Roedel1-2/+5
This will be used when during initialization we detect that the iommu should be disabled. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-22iommu/amd: Rename free_on_init_error()Joerg Roedel1-2/+2
The function will also be used to free iommu resources when amd_iommu=off was specified on the kernel command line. So rename the function to reflect that. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-22iommu/amd: Disable IOMMUs at boot if they are enabledJoerg Roedel1-0/+3
When booting, make sure the IOMMUs are disabled. They could be previously enabled if we boot into a kexec or kdump kernel. So make sure they are off. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-16iommu/amd: Suppress IO_PAGE_FAULTs in kdump kernelJoerg Roedel1-0/+9
When booting into a kdump kernel, suppress IO_PAGE_FAULTs by default for all devices. But allow the faults again when a domain is assigned to a device. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-08iommu/amd: Reduce amount of MMIO when submitting commandsTom Lendacky1-0/+2
As newer, higher speed devices are developed, perf data shows that the amount of MMIO that is performed when submitting commands to the IOMMU causes performance issues. Currently, the command submission path reads the command buffer head and tail pointers and then writes the tail pointer once the command is ready. The tail pointer is only ever updated by the driver so it can be tracked by the driver without having to read it from the hardware. The head pointer is updated by the hardware, but can be read opportunistically. Reading the head pointer only when it appears that there might not be room in the command buffer and then re-checking the available space reduces the number of times the head pointer has to be read. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-03-30x86/events, drivers/amd/iommu: Prepare for multiple IOMMUs supportSuravee Suthikulpanit1-19/+24
Currently, amd_iommu_pc_get_set_reg_val() cannot support multiple IOMMUs. Modify it to allow callers to specify an IOMMU. This is in preparation for supporting multiple IOMMUs. Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jörg Rödel <joro@8bytes.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/1487926102-13073-8-git-send-email-Suravee.Suthikulpanit@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-30x86/events/amd/iommu.c: Modify functions to query max banks and countersSuravee Suthikulpanit1-14/+20
Currently, amd_iommu_pc_get_max_[banks|counters]() use end-point device ID to locate an IOMMU and check the reported max banks/counters. The logic assumes that the IOMMU_BASE_DEVID belongs to the first IOMMU, and uses it to acquire a reference to the first IOMMU, which does not work on certain systems. Instead, modify the function to take an IOMMU index, and use it to query the corresponding AMD IOMMU instance. Currently, hardcode the IOMMU index to 0 since the current AMD IOMMU perf implementation supports only a single IOMMU. A subsequent patch will add support for multiple IOMMUs, and will use a proper IOMMU index. Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jörg Rödel <joro@8bytes.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/1487926102-13073-7-git-send-email-Suravee.Suthikulpanit@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-30x86/events, drivers/iommu/amd: Introduce amd_iommu_get_num_iommus()Suravee Suthikulpanit1-2/+9
Introduce amd_iommu_get_num_iommus(), which returns the value of amd_iommus_present. The function is used to replace direct access to the variable, which is now declared as static. This function will also be used by AMD IOMMU perf driver. Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jörg Rödel <joro@8bytes.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/1487926102-13073-6-git-send-email-Suravee.Suthikulpanit@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-30drivers/iommu/amd: Clean up iommu_pc_get_set_reg()Suravee Suthikulpanit1-5/+8
Clean up coding style and fix a bug in the 64-bit register read logic since it overwrites the upper 32-bit when reading the lower 32-bit. Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jörg Rödel <joro@8bytes.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/1487926102-13073-5-git-send-email-Suravee.Suthikulpanit@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-28iommu/amd: Fix crash when accessing AMD-Vi sysfs entriesJoerg Roedel1-2/+2
The link between the iommu sysfs-device and the struct amd_iommu is no longer stored as driver-data. Update the code to the new correct way of getting from device to amd_iommu. Reported-by: Dave Jones <davej@codemonkey.org.uk> Fixes: 39ab9555c241 ('iommu: Add sysfs bindings for struct iommu_device') Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-02-10Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', ↵Joerg Roedel1-3/+6
'arm/mediatek', 'arm/core', 'x86/vt-d' and 'core' into next
2017-02-10iommu: Add sysfs bindings for struct iommu_deviceJoerg Roedel1-4/+2
There is currently support for iommu sysfs bindings, but those need to be implemented in the IOMMU drivers. Add a more generic version of this by adding a struct device to struct iommu_device and use that for the sysfs bindings. Also convert the AMD and Intel IOMMU driver to make use of it. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-02-10iommu: Introduce new 'struct iommu_device'Joerg Roedel1-0/+5
This struct represents one hardware iommu in the iommu core code. For now it only has the iommu-ops associated with it, but that will be extended soon. The register/unregister interface is also added, as well as making use of it in the Intel and AMD IOMMU drivers. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-01-10iommu/amd: Fix error code path in early_amd_iommu_init()Rafael J. Wysocki1-1/+1
Prevent early_amd_iommu_init() from leaking memory mapped via acpi_get_table() if check_ivrs_checksum() returns an error. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-12-22Merge tag 'acpi-extra-4.10-rc1' of ↵Linus Torvalds1-6/+4
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI updates from Rafael Wysocki: "Here are new versions of two ACPICA changes that were deferred previously due to a problem they had introduced, two cleanups on top of them and the removal of a useless warning message from the ACPI core. Specifics: - Move some Linux-specific functionality to upstream ACPICA and update the in-kernel users of it accordingly (Lv Zheng) - Drop a useless warning (triggered by the lack of an optional object) from the ACPI namespace scanning code (Zhang Rui)" * tag 'acpi-extra-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / osl: Remove deprecated acpi_get_table_with_size()/early_acpi_os_unmap_memory() ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users ACPICA: Tables: Allow FADT to be customized with virtual address ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel ACPI: do not warn if _BQC does not exist
2016-12-21ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() usersLv Zheng1-6/+4
This patch removes the users of the deprectated APIs: acpi_get_table_with_size() early_acpi_os_unmap_memory() The following APIs should be used instead of: acpi_get_table() acpi_put_table() The deprecated APIs are invented to be a replacement of acpi_get_table() during the early stage so that the early mapped pointer will not be stored in ACPICA core and thus the late stage acpi_get_table() won't return a wrong pointer. The mapping size is returned just because it is required by early_acpi_os_unmap_memory() to unmap the pointer during early stage. But as the mapping size equals to the acpi_table_header.length (see acpi_tb_init_table_descriptor() and acpi_tb_validate_table()), when such a convenient result is returned, driver code will start to use it instead of accessing acpi_table_header to obtain the length. Thus this patch cleans up the drivers by replacing returned table size with acpi_table_header.length, and should be a no-op. Reported-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-11-10iommu/amd: Tell kmemleak about the irq_remap_tableLucas Stach1-0/+4
This will get rid of a lot false positives caused by kmemleak being unaware of the irq_remap_table. Based on a suggestion from Catalin Marinas. Signed-off-by: Lucas Stach <dev@lynxeye.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-09-19iommu/amd: Use standard bitmap operation to set bitmapBaoquan He1-1/+2
It will be more readable and safer than the old setting. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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