- 15 7月, 2016 6 次提交
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由 Nathan Fontenot 提交于
A recent update (commit id 31bc3858) allows for automatically onlining memory that is added. This patch sets the config option CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y for pseries and updates the pseries memory hotplug code so that DLPAR added memory can be automatically onlined instead of explicitly onlining the memory. Signed-off-by: NNathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Nathan Fontenot 提交于
Dynamically add entries to the associativity lookup array The ibm,associativity-lookup-arrays property may only contain associativity arrays for LMBs present at boot time. When hotplug adding a LMB its associativity array may not be in the associativity lookup array, this patch adds the ability to add new entries to the associativity lookup array. Signed-off-by: NNathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Nathan Fontenot 提交于
Move property cloning code into its own routine Split the pieces of dlpar_clone_drconf_property() that create a copy of the property struct into its own routine. This allows for creating clones of more than just the ibm,dynamic-memory property used in memory hotplug. Signed-off-by: NNathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
The pseries HVC early debug options, CONFIG_PPC_EARLY_DEBUG_LPAR and CONFIG_PPC_EARLY_DEBUG_LPAR_HVSI both require code that is part of the hvc driver. If we turn them on but not CONFIG_HVC_CONSOLE then we get: arch/powerpc/kernel/built-in.o: In function `.udbg_early_init': arch/powerpc/kernel/built-in.o:(.debug_addr+0x9a00): undefined reference to `udbg_init_debug_lpar' Similarly for HVSI. So make them both depend on CONFIG_HVC_CONSOLE. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Neuling 提交于
At the start of __tm_recheckpoint() we save the kernel stack pointer (r1) in SPRG SCRATCH0 (SPRG2) so that we can restore it after the trecheckpoint. Unfortunately, the same SPRG is used in the SLB miss handler. If an SLB miss is taken between the save and restore of r1 to the SPRG, the SPRG is changed and hence r1 is also corrupted. We can end up with the following crash when we start using r1 again after the restore from the SPRG: Oops: Bad kernel stack pointer, sig: 6 [#1] SMP NR_CPUS=2048 NUMA pSeries CPU: 658 PID: 143777 Comm: htm_demo Tainted: G EL X 4.4.13-0-default #1 task: c0000b56993a7810 ti: c00000000cfec000 task.ti: c0000b56993bc000 NIP: c00000000004f188 LR: 00000000100040b8 CTR: 0000000010002570 REGS: c00000000cfefd40 TRAP: 0300 Tainted: G EL X (4.4.13-0-default) MSR: 8000000300001033 <SF,ME,IR,DR,RI,LE> CR: 02000424 XER: 20000000 CFAR: c000000000008468 DAR: 00003ffd84e66880 DSISR: 40000000 SOFTE: 0 PACATMSCRATCH: 00003ffbc865e680 GPR00: fffffffcfabc4268 00003ffd84e667a0 00000000100d8c38 000000030544bb80 GPR04: 0000000000000002 00000000100cf200 0000000000000449 00000000100cf100 GPR08: 000000000000c350 0000000000002569 0000000000002569 00000000100d6c30 GPR12: 00000000100d6c28 c00000000e6a6b00 00003ffd84660000 0000000000000000 GPR16: 0000000000000003 0000000000000449 0000000010002570 0000010009684f20 GPR20: 0000000000800000 00003ffd84e5f110 00003ffd84e5f7a0 00000000100d0f40 GPR24: 0000000000000000 0000000000000000 0000000000000000 00003ffff0673f50 GPR28: 00003ffd84e5e960 00000000003d0f00 00003ffd84e667a0 00003ffd84e5e680 NIP [c00000000004f188] restore_gprs+0x110/0x17c LR [00000000100040b8] 0x100040b8 Call Trace: Instruction dump: f8a1fff0 e8e700a8 38a00000 7ca10164 e8a1fff8 e821fff0 7c0007dd 7c421378 7db142a6 7c3242a6 38800002 7c810164 <e9c100e0> e9e100e8 ea0100f0 ea2100f8 We hit this on large memory machines (> 2TB) but it can also be hit on smaller machines when 1TB segments are disabled. To hit this, you also need to be virtualised to ensure SLBs are periodically removed by the hypervisor. This patches moves the saving of r1 to the SPRG to the region where we are guaranteed not to take any further SLB misses. Fixes: 98ae22e1 ("powerpc: Add helper functions for transactional memory context switching") Cc: stable@vger.kernel.org # v3.9+ Signed-off-by: NMichael Neuling <mikey@neuling.org> Acked-by: NCyril Bur <cyrilbur@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
Pull in the fixes we sent during 4.7, we have code we want to merge into next that depends on some of them.
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- 14 7月, 2016 27 次提交
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由 Daniel Axtens 提交于
powernv marks it's halt and restart calls as __noreturn. However, ppc_md does not have this annotation. Add the annotation to ppc_md, and then to every halt/restart function that is missing it. Additionally, I have verified that all of these functions do not return. Occasionally I have added a spin loop to be sure. Signed-off-by: NDaniel Axtens <dja@axtens.net> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Daniel Axtens 提交于
Explicitly give sparse an endianness in the Makefile, so that it doesn't get confused. Normally we have #ifdef one and #else the other, so it doesn't usually matter, but we have been bitten by it before, and indeed this patch fixes a number of sparse errors. Suggested-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDaniel Axtens <dja@axtens.net> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Daniel Axtens 提交于
kvmppc_h_put_tce_indirect labels a u64 pointer as __user. It also labelled the u64 where get_user puts the result as __user. This isn't a pointer and so doesn't need to be labelled __user. Split the u64 value definition onto a new line to make it clear that it doesn't get the annotation. Signed-off-by: NDaniel Axtens <dja@axtens.net> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Anna-Maria Gleixner 提交于
The FROZEN transitions are used when a CPU suspends/resumes. In case of a suspend/resume, only the up prepare (CPU_UP_PREPARE_FROZEN) is handled. The error handling transition CPU_UP_CANCELED_FROZEN as well as the CPU_ONLINE_FROZEN transition are not handled. Masking the switch case action argument with ~CPU_TASKS_FROZEN, to handle all FROZEN tasks the same way than the corresponding non frozen tasks. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: NAnna-Maria Gleixner <anna-maria@linutronix.de> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Andrew Donnellan 提交于
Add a new API, cxl_check_and_switch_mode() to allow for switching of bi-modal CAPI cards, such as the Mellanox CX-4 network card. When a driver requests to switch a card to CAPI mode, use PCI hotplug infrastructure to remove all PCI devices underneath the slot. We then write an updated mode control register to the CAPI VSEC, hot reset the card, and reprobe the card. As the card may present a different set of PCI devices after the mode switch, use the infrastructure provided by the pnv_php driver and the OPAL PCI slot management facilities to ensure that: * the old devices are removed from both the OPAL and Linux device trees * the new devices are probed by OPAL and added to the OPAL device tree * the new devices are added to the Linux device tree and probed through the regular PCI device probe path As such, introduce a new option, CONFIG_CXL_BIMODAL, with a dependency on the pnv_php driver. Refactor existing code that touches the mode control register in the regular single mode case into a new function, setup_cxl_protocol_area(). Co-authored-by: NIan Munsie <imunsie@au1.ibm.com> Cc: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NGavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Andrew Donnellan 提交于
When calling pnv_php_set_slot_power_state() with state == OPAL_PCI_SLOT_OFFLINE, remove devices from the device tree as if we're dealing with OPAL_PCI_SLOT_POWER_OFF. Cc: Gavin Shan <gwshan@linux.vnet.ibm.com> Cc: linux-pci@vger.kernel.org Cc: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Acked-by: NGavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Andrew Donnellan 提交于
The cxl driver will use infrastructure from pnv_php to handle device tree updates when switching bi-modal CAPI cards into CAPI mode. To enable this, export pnv_php_find_slot() and pnv_php_set_slot_power_state(), and add corresponding declarations, as well as the definition of struct pnv_php_slot, to asm/pnv-pci.h. Cc: Gavin Shan <gwshan@linux.vnet.ibm.com> Cc: linux-pci@vger.kernel.org Cc: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Acked-by: NGavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
The CX4 card cannot cope with a context with PE=0 due to a hardware limitation, resulting in: [ 34.166577] command failed, status limits exceeded(0x8), syndrome 0x5a7939 [ 34.166580] mlx5_core 0000:01:00.1: Failed allocating uar, aborting Since the kernel API allocates a default context very early during device init that will almost certainly get Process Element ID 0 there is no easy way for us to extend the API to allow the Mellanox to inform us of this limitation ahead of time. Instead, work around the issue by extending the XSL structure to include a minimum PE to allocate. Although the bug is not in the XSL, it is the easiest place to work around this limitation given that the CX4 is currently the only card that uses an XSL. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
The Mellanox CX4 in cxl mode uses a hybrid interrupt model, where interrupts are routed from the networking hardware to the XSL using the MSIX table, and from there will be transformed back into an MSIX interrupt using the cxl style interrupts (i.e. using IVTE entries and ranges to map a PE and AFU interrupt number to an MSIX address). We want to hide the implementation details of cxl interrupts as much as possible. To this end, we use a special version of the MSI setup & teardown routines in the PHB while in cxl mode to allocate the cxl interrupts and configure the IVTE entries in the process element. This function does not configure the MSIX table - the CX4 card uses a custom format in that table and it would not be appropriate to fill that out in generic code. The rest of the functionality is similar to the "Full MSI-X mode" described in the CAIA, and this could be easily extended to support other adapters that use that mode in the future. The interrupts will be associated with the default context. If the maximum number of interrupts per context has been limited (e.g. by the mlx5 driver), it will automatically allocate additional kernel contexts to associate extra interrupts as required. These contexts will be started using the same WED that was used to start the default context. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
The Mellanox CX4 has a hardware limitation where only 4 bits of the AFU interrupt number can be passed to the XSL when sending an interrupt, limiting it to only 15 interrupts per context (AFU interrupt number 0 is invalid). In order to overcome this, we will allocate additional contexts linked to the default context as extra address space for the extra interrupts - this will be implemented in the next patch. This patch adds the preliminary support to allow this, by way of adding a linked list in the context structure that we use to keep track of the contexts dedicated to interrupts, and an API to simultaneously iterate over the related context structures, AFU interrupt numbers and hardware interrupt numbers. The point of using a single API to iterate these is to hide some of the details of the iteration from external code, and to reduce the number of APIs that need to be exported via base.c to allow built in code to call. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
These APIs will be used by the Mellanox CX4 support. While they function standalone to configure existing behaviour, their primary purpose is to allow the Mellanox driver to inform the cxl driver of a hardware limitation, which will be used in a future patch. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
This hooks up support for using the kernel API with a real PHB. After the AFU initialisation has completed it calls into the PHB code to pass it the AFU that will be used by other peer physical functions on the adapter. The cxl_pci_to_afu API is extended to work with peer PCI devices, retrieving the peer AFU from the PHB. This API may also now return an error if it is called on a PCI device that is not associated with either a cxl vPHB or a peer PCI device to an AFU, and this error is propagated down. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
This adds support for the peer model of the cxl kernel api to the PowerNV PHB, in which physical function 0 represents the cxl function on the card (an XSL in the case of the CX4), which other physical functions will use for memory access and interrupt services. It is referred to as the peer model as these functions are peers of one another, as opposed to the Virtual PHB model which forms a hierarchy. This patch exports APIs to enable the peer mode, check if a PCI device is attached to a PHB in this mode, and to set and get the peer AFU for this mode. The cxl driver will enable this mode for supported cards by calling pnv_cxl_enable_phb_kernel_api(). This will set a flag in the PHB to note that this mode is enabled, and switch out it's controller_ops for the cxl version. The cxl version of the controller_ops struct implements it's own versions of the enable_device_hook and release_device to handle refcounting on the peer AFU and to allocate a default context for the device. Once enabled, the cxl kernel API may not be disabled on a PHB. Currently there is no safe way to disable cxl mode short of a reboot, so until that changes there is no reason to support the disable path. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
The vPHB model of the cxl kernel API is a hierarchy where the AFU is represented by the vPHB, and it's AFU configuration records are exposed as functions under that vPHB. If there are no AFU configuration records we will create a vPHB with nothing under it, which is a waste of resources and will opt us into EEH handling despite not having anything special to handle. This also does not make sense for cards using the peer model of the cxl kernel API, where the other functions of the device are exposed via additional peer physical functions rather than AFU configuration records. This model will also not work with the existing EEH handling in the cxl driver, as that is designed around the vPHB model. Skip creating the vPHB for AFUs without any AFU configuration records, and opt out of EEH handling for them. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
The cxl kernel API has a concept of a default context associated with each PCI device under the virtual PHB. The Mellanox CX4 will also use the cxl kernel API, but it does not use a virtual PHB - rather, the AFU appears as a physical function as a peer to the networking functions. In order to allow the kernel API to work with those networking functions, we will need to associate a default context with them as well. To this end, refactor the corresponding code to do this in vphb.c and export it so that it can be called from the PHB code. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
The Mellanox CX4 uses a model where the AFU is one physical function of the device, and is used by other peer physical functions of the same device. This will require those other devices to grab a reference on the AFU when they are initialised to make sure that it does not go away during their lifetime. Move the AFU refcount functions to base.c so they can be called from the PHB code. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
Devices that use CAPP DMA mode (such as the Mellanox CX4) require bus master to be enabled in order for the CAPI traffic to flow. This should be harmless to enable for other cxl devices, so unconditionally enable it in the adapter init flow. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
This extends the check that the adapter is in a CAPI capable slot so that it may be called by external users in the kernel API. This will be used by the upcoming Mellanox CX4 support, which needs to know ahead of time if the card can be switched to cxl mode so that it can leave it in PCI mode if it is not. This API takes a parameter to check if CAPP DMA mode is supported, which it currently only allows on P8NVL systems, since that mode currently has issues accessing memory < 4GB on P8, and we cannot realistically avoid that. This API does not currently check if a CAPP unit is available (i.e. not already assigned to another PHB) on P8. Doing so would be racy since it is assigned on a first come first serve basis, and so long as CAPP DMA mode is not supported on P8 we don't need this, since the only anticipated user of this API requires CAPP DMA mode. Cc: Philippe Bergheaud <felix@linux.vnet.ibm.com> Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Ian Munsie 提交于
The support for using the Mellanox CX4 in cxl mode will require additions to the PHB code. In preparation for this, move the existing cxl code out of pci-ioda.c into a separate pci-cxl.c file to keep things more organised. Signed-off-by: NIan Munsie <imunsie@au1.ibm.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Wei Yongjun 提交于
Use for_each_compatible_node() macro instead of open coding it. Generated by Coccinelle. Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: NIan Munsie <imunsie@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
PROT_SAO is a powerpc-specific flag to mmap(), and we rely on arch specific logic to allow it to be passed to mmap(). Add a small test to ensure mmap() accepts PROT_SAO. We don't have a good way to test that it actually causes the mapping to be created with the right flags, so for now we just touch the mapping so it's faulted in. In future we might be able to do something better. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
Purely to make it pleasing to the eye. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
None of these are used, or have been since we merged ppc & ppc64. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Suraj Jitindar Singh 提交于
The array crash_shutdown_handles[] has size CRASH_HANDLER_MAX, thus when we loop over the elements of the list we check crash_shutdown_handles[i] && i < CRASH_HANDLER_MAX. However this means that when we increment i to CRASH_HANDLER_MAX we will perform an out of bound array access checking the first condition before exiting on the second condition. To avoid the out of bounds access, simply reorder the loop conditions. Fixes: 1d145165 ("powerpc: Add array bounds checking to crash_shutdown_handlers") Signed-off-by: NSuraj Jitindar Singh <sjitindarsingh@gmail.com> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 13 7月, 2016 6 次提交
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由 Benjamin Herrenschmidt 提交于
The subsequent test for RTAS along with the LPAR test are sufficient Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Benjamin Herrenschmidt 提交于
The test is unnecessary, the FW_FEATURE_LPAR is sufficient as there exist no other LPAR type that has RTAS. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Benjamin Herrenschmidt 提交于
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Benjamin Herrenschmidt 提交于
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Benjamin Herrenschmidt 提交于
ge_imp3a_pic_init() is called way beyond the unflattening of the tree, it shouldn't be using of_flat_dt_* Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Benjamin Herrenschmidt 提交于
Some bit of SPU code was using the FDT rather than the expanded device-tree. Fix it. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 11 7月, 2016 1 次提交
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由 Benjamin Herrenschmidt 提交于
The function is called by both 32-bit and 64-bit early setup right after early_init_devtree(). All it does is run yet another early DT parser which is precisely what early_init_devtree() is about, so move it in there. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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