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path: root/drivers/iommu/amd_iommu_init.c
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2012-10-16iommu/amd: Work around wrong IOAPIC device-id in IVRS tableJoerg Roedel1-7/+32
On some systems the BIOS puts the wrong device-id for the IO-APIC into the IVRS table. The result is that interrupt remapping is not working for the IO-APIC irqs. This usually means a kernel panic at boot because the timer is not working. Fix this kernel panic by disabling interrupt remapping if this problem is discovered in the IVRS table. Reported-by: Andrew Oakley <andrew@ado.is-a-geek.net> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-10-02Merge branches 'dma-debug', 'iommu/fixes', 'arm/tegra', 'arm/exynos', ↵Joerg Roedel1-20/+233
'x86/amd', 'x86/vt-d' and 'x86/amd-irq-remapping' into next Conflicts: drivers/iommu/amd_iommu_init.c
2012-09-28iommu/amd: Print message to system log when irq remapping is enabledJoerg Roedel1-0/+2
Print an indicator to dmesg to easily find out if interrupt remapping is enabled of a given system. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-28iommu/amd: Make sure irq remapping still works on dma init failureJoerg Roedel1-9/+31
Do not deinitialize the AMD IOMMU driver completly when interrupt remapping is already in use but the initialization of the DMA layer fails for some reason. Make sure the IOMMU can still be used to remap interrupts. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-28iommu/amd: Add initialization routines for AMD interrupt remappingJoerg Roedel1-0/+42
Add the six routines required to setup interrupt remapping with the AMD IOMMU. Also put it all together into the AMD specific irq_remap_ops. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-28iommu/amd: Make sure IOMMU is not considered to translate itselfJoerg Roedel1-0/+7
The IVRS table usually includes the IOMMU device. But the IOMMU does never translate itself, so make sure the IOMMU driver knows this. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-28iommu/amd: Split device table initialization into irq and dma partJoerg Roedel1-1/+18
When the IOMMU is enabled very early (as with irq-remapping) some devices are still in BIOS hand. When dma is blocked early this can cause lots of IO_PAGE_FAULTs. So delay the DMA initialization and do it right before the dma_ops are initialized. To be secure, block all interrupts by default when irq-remapping is enabled in the system. They will be reenabled on demand later. Without blocking interrupts by default devices can issue arbitrary interrupts by sending special DMA packets to the CPU that look like MSI messages. This is especially dangerous when a device is assigned to a KVM guest because the guest can then DoS the host. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-28iommu/amd: Check if IOAPIC information is correctJoerg Roedel1-3/+24
When the IOAPIC information provided in the IVRS table is not correct or not complete the system may not boot at all when interrupt remapping is enabled. So check if this information is correct and print out a firmware bug message when it is not. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-28iommu/amd: Allocate data structures to keep track of irq remapping tablesJoerg Roedel1-0/+16
To easily map device ids to interrupt remapping table entries a new lookup table is necessary. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-28iommu/amd: Add slab-cache for irq remapping tablesJoerg Roedel1-0/+23
The irq remapping tables for the AMD IOMMU need to be aligned on a 128 byte boundary. Create a seperate slab-cache to guarantee this alignment. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-28iommu/amd: Keep track of HPET and IOAPIC device idsJoerg Roedel1-2/+66
The IVRS ACPI table provides information about the IOAPICs and the HPETs available in the system and which PCI device ID they use in transactions. Save that information for later usage in interrupt remapping. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-09-28iommu/amd: Fix features reportingBorislav Petkov1-1/+1
When the AMD IOMMU doesn't have extended features, an empty line gets issued in dmesg like so: [ 3.061417] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40 [ 3.066757] <--- [ 3.068294] pci 0000:00:00.2: irq 72 for MSI/MSI-X [ 3.081213] AMD-Vi: Lazy IO/TLB flushing enabled Fix it. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-18iommu/amd: Fix some typosFrank Arnold1-5/+5
Fix some typos in comments and user-visible messages. No functional changes. Signed-off-by: Frank Arnold <frank.arnold@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-18iommu/amd: remove duplicated include from amd_iommu_init.cWei Yongjun1-1/+0
Remove duplicated include. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-08-10iommu/amd: Fix wrong check for ARRAY_SIZE()Joerg Roedel1-1/+1
The check in the for-loop is broken. Fix it and the boot-crash it causes in AMD IOMMUv2 systems. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-08-06iommu/amd: Fix pci_request_acs() call-placeJoerg Roedel1-3/+3
The pci_request_acs() function needs to be called before PCI probing to be effective. So move it to another call-place to ensure that. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Convert iommu initialization to state machineJoerg Roedel1-64/+109
This step makes it very easy to keep track about the current intialization state of the iommu driver. With this change we can initialize the IOMMU hardware to a point where it can remap interrupts and later resume the initializion to enable dma remapping. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Introduce amd_iommu_init_dma routineJoerg Roedel1-7/+20
This function will initialize everthing necessary so that devices can do DMA. This includes dma_ops and iommu_ops. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Move unmap_flush message to amd_iommu_init_dma_ops()Joerg Roedel1-8/+0
The message belongs there anyway, so move it to that function. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Split enable_iommus() routineJoerg Roedel1-3/+18
Split the enable_iommus() routine so that a part of it can run in early code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Introduce early_amd_iommu_init routineJoerg Roedel1-15/+23
Split out the code to parse the ACPI table and setup relevant data structures into a new function. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Move informational prinks out of iommu_enableJoerg Roedel1-17/+27
This function will be called before the PCI subsystem is initialized. Therefore dev_name doen't work and IOMMU information can't be printed to the klog as before. Move the code to print that information to a later point where PCI initializtion has already happened. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Split out PCI related parts of IOMMU initializationJoerg Roedel1-106/+118
For interrupt remapping the relevant IOMMU initialization needs to run earlier at boot when the PCI subsystem is not yet initialized. To support that this patch splits the parts of IOMMU initialization which need PCI accesses out of the initial setup path so that this can be done later. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Use acpi_get_table instead of acpi_table_parseJoerg Roedel1-52/+66
This makes it easier to propagate errors while parsing the IVRS table and makes the amd_iommu_init_err hack obsolete. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/amd: Fix sparse warningsJoerg Roedel1-11/+5
A few sparse warnings fire in drivers/iommu/amd_iommu_init.c. Fix most of them with this patch. Also fix the sparse warnings in drivers/iommu/irq_remapping.c while at it. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-02iommu/amd: fix type bug in flush codeDan Carpenter1-1/+1
write_file_bool() modifies 32 bits of data, so "amd_iommu_unmap_flush" needs to be 32 bits as well or we'll corrupt memory. Fortunately it looks like the data is aligned with a gap after the declaration so this is harmless in production. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-06-07iommu/amd: Fix missing iommu_shutdown initialization in passthrough modeShuah Khan1-2/+2
The iommu_shutdown callback is not initialized when the AMD IOMMU driver runs in passthrough mode. Fix that by moving the callback initialization before the check for passthrough mode. Signed-off-by: Shuah Khan <shuah.khan@hp.com> Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-06-04iommu/amd: Cache pdev pointer to root-bridgeJoerg Roedel1-8/+5
At some point pci_get_bus_and_slot started to enable interrupts. Since this function is used in the amd_iommu_resume path it will enable interrupts on resume which causes a warning. The fix will use a cached pointer to the root-bridge to re-enable the IOMMU in case the BIOS is broken. Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-03-22Merge branches 'iommu/fixes', 'arm/tegra' and 'x86/amd' into nextJoerg Roedel1-64/+123
2012-03-22iommu/amd: Fix section mismatchGerard Snitselaar1-2/+2
amd_iommu_enable_interrupts() called in amd_iommu_resume(). Signed-off-by: Gerard Snitselaar <dev@snitselaar.org> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2012-03-15iommu/amd: Move interrupt setup code into seperate functionJoerg Roedel1-1/+23
For interrupt remapping the enablement of the IOMMU MSI interrupt needs to be deferred because the IOMMU itself will be initialized before the io-apics are up and running. So the code to setup the MSI is moved seperated from the hardware-setup routine now. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-03-15iommu/amd: Make sure IOMMU interrupts are re-enabled on resumeJoerg Roedel1-10/+20
Unfortunatly the interrupts for the event log and the peripheral page-faults are only enabled at boot but not re-enabled at resume. Fix that. Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-03-09iommu/amd: Fix double free of mem-region in error-pathJoerg Roedel1-9/+1
When ioremap_nocache fails in iommu initialization the code calls release_mem_region immediatly. But the function is called again when the propagates into the upper init functions leading to a double-free. Fix that. Reported-by: Don Dutile <ddutile@redhat.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-03-08x86/amd: iommu_set_device_table() must not be __initJan Beulich1-1/+1
This function is called from enable_iommus(), which in turn is used from amd_iommu_resume(). Cc: stable@vger.kernel.org Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-03-01iommu/amd: Split amd_iommu_init functionJoerg Roedel1-44/+79
The hardware-initializtion part of the AMD IOMMU driver is split out into a seperate function. This function can now be called either from amd_iommu_init() itself or any other place if the hardware needs to be ready earlier. This will be used to implement interrupt remapping for AMD. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-22iommu/amd: Set IOTLB invalidation timeoutJoerg Roedel1-0/+13
To protect the command buffer from hanging when a device does not respond to an IOTLB invalidation, set a timeout of 1s for outstanding IOTLB invalidations. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-22iommu/amd: Remove unnecessary cache flushes in amd_iommu_resumeJoerg Roedel1-7/+0
The caches are already flushed in enable_iommus(), so this flush is not necessary. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-12iommu/amd: Add support for IOMMUv2 domain modeJoerg Roedel1-0/+9
This patch adds support for protection domains that implement two-level paging for devices. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-12iommu/amd: Put IOMMUv2 capable devices in pt_domainJoerg Roedel1-0/+4
If the device starts to use IOMMUv2 features the dma handles need to stay valid. The only sane way to do this is to use a identity mapping for the device and not translate it by the iommu. This is implemented with this patch. Since this lifts the device-isolation there is also a new kernel parameter which allows to disable that feature. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-12iommu/amd: Add iommuv2 flag to struct amd_iommuJoerg Roedel1-0/+15
In mixed IOMMU setups this flag inidicates whether an IOMMU supports the v2 features or not. This patch also adds a global flag together with a function to query that flag from other code. The flag shows if at least one IOMMUv2 is in the system. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-12iommu/amd: Enable GT mode when supported by IOMMUJoerg Roedel1-0/+9
This feature needs to be enabled before IOMMUv2 DTEs can be set up. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-12iommu/amd: Setup PPR log when supported by IOMMUJoerg Roedel1-0/+51
Allocate and enable a log buffer for peripheral page faults when the IOMMU supports this feature. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-12iommu/amd: Get the maximum number of PASIDs supportedJoerg Roedel1-0/+13
Read the number of PASIDs supported by each IOMMU in the system and take the smallest number as the maximum value supported by the IOMMU driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-12iommu/amd: Convert dev_table_entry to u64Joerg Roedel1-6/+6
Convert the contents of 'struct dev_table_entry' to u64 to allow updating the DTE wit 64bit writes as required by the spec. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-06-21iommu/amd: Move missing parts to drivers/iommuJoerg Roedel1-0/+1574
A few parts of the driver were missing in drivers/iommu. Move them there to have the complete driver in that directory. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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