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* powerpc/powernv: new function to access OPAL msglogAndrew Donnellan2016-02-091-2/+5
| | | | | | | | | | | | | Currently, the OPAL msglog/console buffer is exposed as a sysfs file, with the sysfs read handler responsible for retrieving the log from the OPAL buffer. We'd like to be able to use it in xmon as well. Refactor the OPAL msglog code to create a new function, opal_msglog_copy(), that copies to an arbitrary buffer. Separate the initialisation code into generic memcons init and sysfs file creation. Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* Merge tag 'powerpc-4.5-1' of ↵Linus Torvalds2016-01-151-24/+17Star
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Core: - Ground work for the new Power9 MMU from Aneesh Kumar K.V - Optimise FP/VMX/VSX context switching from Anton Blanchard Misc: - Various cleanups from Krzysztof Kozlowski, John Ogness, Rashmica Gupta, Russell Currey, Gavin Shan, Daniel Axtens, Michael Neuling, Andrew Donnellan - Allow wrapper to work on non-english system from Laurent Vivier - Add rN aliases to the pt_regs_offset table from Rashmica Gupta - Fix module autoload for rackmeter & axonram drivers from Luis de Bethencourt - Include KVM guest test in all interrupt vectors from Paul Mackerras - Fix DSCR inheritance over fork() from Anton Blanchard - Make value-returning atomics & {cmp}xchg* & their atomic_ versions fully ordered from Boqun Feng - Print MSR TM bits in oops messages from Michael Neuling - Add TM signal return & invalid stack selftests from Michael Neuling - Limit EPOW reset event warnings from Vipin K Parashar - Remove the Cell QPACE code from Rashmica Gupta - Append linux_banner to exception information in xmon from Rashmica Gupta - Add selftest to check if VSRs are corrupted from Rashmica Gupta - Remove broken GregorianDay() from Daniel Axtens - Import Anton's context_switch2 benchmark into selftests from Michael Ellerman - Add selftest script to test HMI functionality from Daniel Axtens - Remove obsolete OPAL v2 support from Stewart Smith - Make enter_rtas() private from Michael Ellerman - PPR exception cleanups from Michael Ellerman - Add page soft dirty tracking from Laurent Dufour - Add support for Nvlink NPUs from Alistair Popple - Add support for kexec on 476fpe from Alistair Popple - Enable kernel CPU dlpar from sysfs from Nathan Fontenot - Copy only required pieces of the mm_context_t to the paca from Michael Neuling - Add a kmsg_dumper that flushes OPAL console output on panic from Russell Currey - Implement save_stack_trace_regs() to enable kprobe stack tracing from Steven Rostedt - Add HWCAP bits for Power9 from Michael Ellerman - Fix _PAGE_PTE breaking swapoff from Aneesh Kumar K.V - Fix _PAGE_SWP_SOFT_DIRTY breaking swapoff from Hugh Dickins - scripts/recordmcount.pl: support data in text section on powerpc from Ulrich Weigand - Handle R_PPC64_ENTRY relocations in modules from Ulrich Weigand cxl: - cxl: Fix possible idr warning when contexts are released from Vaibhav Jain - cxl: use correct operator when writing pcie config space values from Andrew Donnellan - cxl: Fix DSI misses when the context owning task exits from Vaibhav Jain - cxl: fix build for GCC 4.6.x from Brian Norris - cxl: use -Werror only with CONFIG_PPC_WERROR from Brian Norris - cxl: Enable PCI device ID for future IBM CXL adapter from Uma Krishnan Freescale: - Freescale updates from Scott: Highlights include moving QE code out of arch/powerpc (to be shared with arm), device tree updates, and minor fixes" * tag 'powerpc-4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (149 commits) powerpc/module: Handle R_PPC64_ENTRY relocations scripts/recordmcount.pl: support data in text section on powerpc powerpc/powernv: Fix OPAL_CONSOLE_FLUSH prototype and usages powerpc/mm: fix _PAGE_SWP_SOFT_DIRTY breaking swapoff powerpc/mm: Fix _PAGE_PTE breaking swapoff cxl: Enable PCI device ID for future IBM CXL adapter cxl: use -Werror only with CONFIG_PPC_WERROR cxl: fix build for GCC 4.6.x powerpc: Add HWCAP bits for Power9 powerpc/powernv: Reserve PE#0 on NPU powerpc/powernv: Change NPU PE# assignment powerpc/powernv: Fix update of NVLink DMA mask powerpc/powernv: Remove misleading comment in pci.c powerpc: Implement save_stack_trace_regs() to enable kprobe stack tracing powerpc: Fix build break due to paca mm_context_t changes cxl: Fix DSI misses when the context owning task exits MAINTAINERS: Update Scott Wood's e-mail address powerpc/powernv: Fix minor off-by-one error in opal_mce_check_early_recovery() powerpc: Fix style of self-test config prompts powerpc/powernv: Only delay opal_rtc_read() retry when necessary ...
| * powerpc/powernv: Fix minor off-by-one error in opal_mce_check_early_recovery()Andrew Donnellan2015-12-271-1/+1
| | | | | | | | | | | | | | | | Fix off-by-one error in opal_mce_check_early_recovery() when checking whether the NIP falls within OPAL space. Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * powerpc/powernv: Add a kmsg_dumper that flushes console output on panicRussell Currey2015-12-271-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On BMC machines, console output is controlled by the OPAL firmware and is only flushed when its pollers are called. When the kernel is in a panic state, it no longer calls these pollers and thus console output does not completely flush, causing some output from the panic to be lost. Output is only actually lost when the kernel is configured to not power off or reboot after panic (i.e. CONFIG_PANIC_TIMEOUT is set to 0) since OPAL flushes the console buffer as part of its power down routines. Before this patch, however, only partial output would be printed during the timeout wait. This patch adds a new kmsg_dumper which gets called at panic time to ensure panic output is not lost. It accomplishes this by calling OPAL_CONSOLE_FLUSH in the OPAL API, and if that is not available, the pollers are called enough times to (hopefully) completely flush the buffer. The flushing mechanism will only affect output printed at and before the kmsg_dump call in kernel/panic.c:panic(). As such, the "end Kernel panic" message may still be truncated as follows: >Call Trace: >[c000000f1f603b00] [c0000000008e9458] dump_stack+0x90/0xbc (unreliable) >[c000000f1f603b30] [c0000000008e7e78] panic+0xf8/0x2c4 >[c000000f1f603bc0] [c000000000be4860] mount_block_root+0x288/0x33c >[c000000f1f603c80] [c000000000be4d14] prepare_namespace+0x1f4/0x254 >[c000000f1f603d00] [c000000000be43e8] kernel_init_freeable+0x318/0x350 >[c000000f1f603dc0] [c00000000000bd74] kernel_init+0x24/0x130 >[c000000f1f603e30] [c0000000000095b0] ret_from_kernel_thread+0x5c/0xac >---[ end Kernel panic - not This functionality is implemented as a kmsg_dumper as it seems to be the most sensible way to introduce platform-specific functionality to the panic function. Signed-off-by: Russell Currey <ruscur@russell.cc> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * powerpc/powernv: remove FW_FEATURE_OPALv3 and just use FW_FEATURE_OPALStewart Smith2015-12-171-14/+11Star
| | | | | | | | | | | | | | | | | | | | | | | | Long ago, only in the lab, there was OPALv1 and OPALv2. Now there is just OPALv3, with nobody ever expecting anything on pre-OPALv3 to be cared about or supported by mainline kernels. So, let's remove FW_FEATURE_OPALv3 and instead use FW_FEATURE_OPAL exclusively. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * powerpc/powernv: Remove OPALv2 firmware define and referencesStewart Smith2015-12-171-6/+2Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | OPALv2 only ever existed in the lab and didn't escape to the world. All OPAL systems in the wild are OPALv3. The probability of there being an OPALv2 system still powered on anywhere inside IBM is approximately zero, let alone anyone expecting to run mainline kernels. So, start to remove references to OPALv2. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * powerpc/powernv: panic() on OPAL < V3Stewart Smith2015-12-171-4/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | The OpenPower Abstraction Layer firmware went through a couple of iterations in the lab before being released. What we now know as OPAL advertises itself as OPALv3. OPALv2 and OPALv1 never made it outside the lab, and the possibility of anyone at all ever building a mainline kernel today and expecting it to boot on such hardware is zero. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* | powerpc/powernv: pr_warn_once on unsupported OPAL_MSG typeStewart Smith2015-12-171-1/+1
|/ | | | | | | | | | | | | | | | | | When running on newer OPAL firmware that supports sending extra OPAL_MSG types, we would print a warning on *every* message received. This could be a problem for kernels that don't support OPAL_MSG_OCC on machines that are running real close to thermal limits and the OCC is throttling the chip. For a kernel that is paying attention to the message queue, we could get these notifications quite often. Conceivably, future message types could also come fairly often, and printing that we didn't understand them 10,000 times provides no further information than printing them once. Cc: stable@vger.kernel.org Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Panic on unhandled Machine CheckDaniel Axtens2015-10-081-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All unrecovered machine check errors on PowerNV should cause an immediate panic. There are 2 reasons that this is the right policy: it's not safe to continue, and we're already trying to reboot. Firstly, if we go through the recovery process and do not successfully recover, we can't be sure about the state of the machine, and it is not safe to recover and proceed. Linux knows about the following sources of Machine Check Errors: - Uncorrectable Errors (UE) - Effective - Real Address Translation (ERAT) - Segment Lookaside Buffer (SLB) - Translation Lookaside Buffer (TLB) - Unknown/Unrecognised In the SLB, TLB and ERAT cases, we can further categorise these as parity errors, multihit errors or unknown/unrecognised. We can handle SLB errors by flushing and reloading the SLB. We can handle TLB and ERAT multihit errors by flushing the TLB. (It appears we may not handle TLB and ERAT parity errors: I will investigate further and send a followup patch if appropriate.) This leaves us with uncorrectable errors. Uncorrectable errors are usually the result of ECC memory detecting an error that it cannot correct, but they also crop up in the context of PCI cards failing during DMA writes, and during CAPI error events. There are several types of UE, and there are 3 places a UE can occur: Skiboot, the kernel, and userspace. For Skiboot errors, we have the facility to make some recoverable. For userspace, we can simply kill (SIGBUS) the affected process. We have no meaningful way to deal with UEs in kernel space or in unrecoverable sections of Skiboot. Currently, these unrecovered UEs fall through to machine_check_expection() in traps.c, which calls die(), which OOPSes and sends SIGBUS to the process. This sometimes allows us to stumble onwards. For example we've seen UEs kill the kernel eehd and khugepaged. However, the process killed could have held a lock, or it could have been a more important process, etc: we can no longer make any assertions about the state of the machine. Similarly if we see a UE in skiboot (and again we've seen this happen), we're not in a position where we can make any assertions about the state of the machine. Likewise, for unknown or unrecognised errors, we're not able to say anything about the state of the machine. Therefore, if we have an unrecovered MCE, the most appropriate thing to do is to panic. The second reason is that since e784b6499d9c ("powerpc/powernv: Invoke opal_cec_reboot2() on unrecoverable machine check errors."), we attempt a special OPAL reboot on an unhandled MCE. This is so the hardware can record error data for later debugging. The comments in that commit assert that we are heading down the panic path anyway. At the moment this is not always true. With UEs in kernel space, for instance, they are marked as recoverable by the hardware, so if the attempt to reboot failed (e.g. old Skiboot), we wouldn't panic() but would simply die() and OOPS. It doesn't make sense to be staggering on if we've just tried to reboot: we should panic(). Explicitly panic() on unrecovered MCEs on PowerNV. Update the comments appropriately. This fixes some hangs following EEH events on cxlflash setups. Signed-off-by: Daniel Axtens <dja@axtens.net> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Create LED platform deviceVasant Hegde2015-08-201-1/+11
| | | | | | | | | This patch adds platform devices for leds. Also export LED related OPAL API's so that led driver can use these APIs. Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Invoke opal_cec_reboot2() on unrecoverable machine check ↵Mahesh Salgaonkar2015-08-061-0/+35
| | | | | | | | | | | | | | | | | | | | | | | | errors. On non-recoverable MCE errors in kernel space, Linux kernel panics and system reboots. On BMC based system opal-prd runs as a daemon in the host. Hence, kernel crash may prevent opal-prd to detect and analyze this MCE error. This may land us in a situation where the faulty memory never gets de-configured and Linux would keep hitting same MCE error again and again. If this happens in early stage of kernel initialization, then Linux will keep crashing and rebooting in a loop. This patch fixes this issue by invoking new opal_cec_reboot2() call with reboot type OPAL_REBOOT_PLATFORM_ERROR to inform BMC/OCC about this error, so that BMC can collect relevant data for error analysis and decide what component to de-configure before rebooting. This patch is dependent on OPAL patchset posted on skiboot mailing list at https://lists.ozlabs.org/pipermail/skiboot/2015-July/001771.html that introduces opal_cec_reboot2() opal call. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Increase opal-irqchip initcall priorityAlistair Popple2015-06-171-3/+0Star
| | | | | | | | | | | | | | | | | | The eeh subsystem for powernv requires the opal event irqchip to be initialised prior to initialisation or the following errors are produced (and eeh doesn't work as expected): irq: XICS didn't like hwirq-0x9 to VIRQ17 mapping (rc=-22) pnv_eeh_post_init: Can't request OPAL event interrupt (0) On powernv eeh is initialised from a subsys_initcall due to a check for machine_is(powernv) in eeh_init(). This patch increases the initcall priority of opal_event_init() to an arch_initcall to ensure the opal event interface is initialised prior to any users of it. Signed-off-by: Alistair Popple <alistair@popple.id.au> Reported-by: Daniel Axtens <dja@axtens.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Add opal-prd channelJeremy Kerr2015-06-051-1/+3
| | | | | | | | | | | | | This change adds a char device to access the "PRD" (processor runtime diagnostics) channel to OPAL firmware. Includes contributions from Vaidyanathan Srinivasan, Neelesh Gupta & Vishal Kulkarni. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Expose OPAL APIs required by PRD interfaceJeremy Kerr2015-06-051-0/+4
| | | | | | | | The (upcoming) opal-prd driver needs to access the message notifier and xscom code, so add EXPORT_SYMBOL_GPL macros for these. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Merge common platform device initialisationJeremy Kerr2015-06-051-15/+6Star
| | | | | | | | | opal_ipmi_init and opal_flash_init are equivalent, except for the compatbile string. Merge these two into a common opal_pdev_init function. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: convert OPAL codes returned by sysparam callsCédric Le Goater2015-06-041-0/+1
| | | | | | | | The opal_{get,set}_param calls return internal error codes which need to be translated in errnos in Linux. Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* opal: Remove events notifierAlistair Popple2015-05-221-83/+1Star
| | | | | | | | All users of the old opal events notifier have been converted over to the irq domain so remove the event notifier functions. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powernv/opal: Convert opal message events to opal irq domainAlistair Popple2015-05-221-14/+15
| | | | | | | | This patch converts the opal message event to use the new opal irq domain. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Add a virtual irqchip for opal eventsAlistair Popple2015-05-221-66/+12Star
| | | | | | | | | | | | | | | | | | | | | Whenever an interrupt is received for opal the linux kernel gets a bitfield indicating certain events that have occurred and need handling by the various device drivers. Currently this is handled using a notifier interface where we call every device driver that has registered to receive opal events. This approach has several drawbacks. For example each driver has to do its own checking to see if the event is relevant as well as event masking. There is also no easy method of recording the number of times we receive particular events. This patch solves these issues by exposing opal events via the standard interrupt APIs by adding a new interrupt chip and domain. Drivers can then register for the appropriate events using standard kernel calls such as irq_of_parse_and_map(). Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Reorder OPAL subsystem initialisationAlistair Popple2015-05-221-1/+12
| | | | | | | | | | | | Most of the OPAL subsystems are always compiled in for PowerNV and many of them need to be initialised before or after other OPAL subsystems. Rather than trying to control this ordering through machine initcalls it is clearer and easier to control initialisation order with explicit calls in opal_init. Signed-off-by: Alistair Popple <alistair@popple.id.au> Cc: Mahesh Jagannath Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Add interfaces for flash device accessCyril Bur2015-04-111-1/+15
| | | | | | | | | | | | | | | | | | | | This change adds the OPAL interface definitions to allow Linux to read, write and erase from system flash devices. We register platform devices for the flash devices exported by firmware. We clash with the existing opal_flash_init function, which is really for the FSP flash update functionality, so we rename that initcall to opal_flash_update_init(). A future change will add an mtd driver that uses this interface. Changes from Joel Stanley and Jeremy Kerr. Signed-off-by: Cyril Bur <cyrilbur@gmail.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: convert codes returned by OPAL callsCédric Le Goater2015-03-311-0/+19
| | | | | | | | | OPAL has its own list of return codes. The patch provides a translation of such codes in errnos for the opal_sensor_read call, and possibly others if needed. Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* Merge branch 'next-misc' of ↵Michael Ellerman2015-03-261-8/+41
|\ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc into test Merge miscellaneous bits from benh. Fix a minor conflict with OpalMessageType changing names to opal_msg_type.
| * powerpc/powernv: Add OPAL message notifier unregister functionNeelesh Gupta2015-03-251-0/+7
| | | | | | | | | | | | | | | | | | Provide an unregister interface for the opal message notifiers to be called when not needed like during driver unload/remove. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Fix the overflow of OPAL message notifiers head arrayNeelesh Gupta2015-03-251-8/+4Star
| | | | | | | | | | | | | | | | | | | | Fixes the condition check of incoming message type which can otherwise shoot beyond the message notifiers head array. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Reviewed-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Support OPAL requested heartbeatBenjamin Herrenschmidt2015-03-251-0/+30
| | | | | | | | | | | | | | | | If OPAL requests it, call it back via opal_poll_events() at a regular interval. Some versions of OPAL on some machines require this to operate some internal timeouts properly. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/powernv: Move opal-api.h closer to the Skiboot versionMichael Ellerman2015-03-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit gets opal-api.h to mostly match the version in Skiboot as of commit ea7d806ab0ba. The exceptions are things which are not (currently) used in Linux. Most of this is just whitespace and a few things moving around. I think the diff is readable. Also OpalMessageType became opal_msg_type, requiring a change in the Linux code. Finally Skiboot and Linux disagree on CAPI vs CXL, because CAPI means something else in Linux. To handle that we just point the Linux wrapper, which is named "cxl" to the OPAL token OPAL_PCI_SET_PHB_CAPI_MODE. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com>
* | powerpc/powernv: only register log if OPAL supports doing soStewart Smith2015-03-161-1/+5
|/ | | | | | | | | | Correct use of REGISTER/UNREGISTER is to check if the token exists before calling. If we don't we get a "OPAL: Called with bad token 101 !" error, which is harmless but may be alarming to some. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Acked-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Don't alloc IRQ map if necessaryGavin Shan2015-01-281-3/+4
| | | | | | | | | | | | On PowerNV platform, the OPAL interrupts are exported by firmware through device-node property (/ibm,opal::opal-interrupts). Under some extreme circumstances (e.g. simulator), we don't have this property found from the device tree. For that case, we shouldn't allocate the interrupt map. Otherwise, slab complains allocating zero sized memory chunk. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Separate function for OPAL IRQ setupGavin Shan2015-01-281-20/+41
| | | | | | | | | | | | | | | The patch put the OPAL interrupt setup logic in opal_init() into seperate function opal_irq_init() for easier code maintaining. The patch doesn't introduce logic changes except: * Rename variable names. * Release virtual IRQ upon error from request_irq(). * Don't cache the virtual IRQ to opal_irqs[] upon error from request_irq(). Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Remove "opal" prefix from pr_xxx()sMichael Ellerman2015-01-281-6/+6
| | | | | | | | | | | | | In commit c8742f85125d "powerpc/powernv: Expose OPAL firmware symbol map" I added pr_fmt() to opal.c. This left some existing pr_xxx()s with duplicate "opal" prefixes, eg: opal: opal: Found 0 interrupts reserved for OPAL Fix them all up. Also make the "Not not found" message a bit more verbose. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Skip registering log region when CONFIG_PRINTK=nPranith Kumar2015-01-271-0/+6
| | | | | | | | | When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get() return 0. Check for these return values and skip registering the dump buffer. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Expose OPAL firmware symbol mapBenjamin Herrenschmidt2014-12-151-1/+37
| | | | | | | | | Newer versions of OPAL will provide this, so let's expose it to user space so tools like perf can use it to properly decode samples in firmware space. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* i2c: Driver to expose PowerNV platform i2c bussesNeelesh Gupta2014-12-141-0/+12
| | | | | | | | | | | | | The patch exposes the available i2c busses on the PowerNV platform to the kernel and implements the bus driver to support i2c and smbus commands. The driver uses the platform device infrastructure to probe the busses on the platform and registers them with the i2c driver framework. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Wolfram Sang <wsa@the-dreams.de> (I2C part, excluding the bindings) Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Cleanup unused MCE definitions/declarations.Mahesh Salgaonkar2014-12-021-1/+0Star
| | | | | | | | | Cleanup OpalMCE_* definitions/declarations and other related code which is not used anymore. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by: Benjamin Herrrenschmidt <benh@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* rtc/tpo: Driver to support rtc and wakeup on PowerNV platformNeelesh Gupta2014-11-171-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch implements the OPAL rtc driver that binds with the rtc driver subsystem. The driver uses the platform device infrastructure to probe the rtc device and register it to rtc class framework. The 'wakeup' is supported depending upon the property 'has-tpo' present in the OF node. It provides a way to load the generic rtc driver in in the absence of an OPAL driver. The patch also moves the existing OPAL rtc get/set time interfaces to the new driver and exposes the necessary OPAL calls using EXPORT_SYMBOL_GPL. Test results: ------------- Host: [root@tul169p1 ~]# ls -l /sys/class/rtc/ total 0 lrwxrwxrwx 1 root root 0 Oct 14 03:07 rtc0 -> ../../devices/opal-rtc/rtc/rtc0 [root@tul169p1 ~]# cat /sys/devices/opal-rtc/rtc/rtc0/time 08:10:07 [root@tul169p1 ~]# echo `date '+%s' -d '+ 2 minutes'` > /sys/class/rtc/rtc0/wakealarm [root@tul169p1 ~]# cat /sys/class/rtc/rtc0/wakealarm 1413274345 [root@tul169p1 ~]# FSP: $ smgr mfgState standby $ rtim timeofday System time is valid: 2014/10/14 08:12:04.225115 $ smgr mfgState ipling $ CC: devicetree@vger.kernel.org CC: tglx@linutronix.de CC: rtc-linux@googlegroups.com CC: a.zummo@towertech.it Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Add OPAL IPMI interfaceJeremy Kerr2014-11-121-0/+14
| | | | | | | | | | | | | Recent OPAL firmare adds a couple of functions to send and receive IPMI messages: https://github.com/open-power/skiboot/commit/b2a374da This change updates the token list and wrappers to suit, and adds the platform devices for any IPMI interfaces. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* Merge branch 'for-linus' of ↵Linus Torvalds2014-10-211-0/+21
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull more powerpc updates from Michael Ellerman: "Here's some more updates for powerpc for 3.18. They are a bit late I know, though must are actually bug fixes. In my defence I nearly cut the top of my finger off last weekend in a gruesome bike maintenance accident, so I spent a good part of the week waiting around for doctors. True story, I can send photos if you like :) Probably the most interesting fix is the sys_call_table one, which enables syscall tracing for powerpc. There's a fix for HMI handling for old firmware, more endian fixes for firmware interfaces, more EEH fixes, Anton fixed our routine that gets the current stack pointer, and a few other misc bits" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (22 commits) powerpc: Only do dynamic DMA zone limits on platforms that need it powerpc: sync pseries_le_defconfig with pseries_defconfig powerpc: Add printk levels to setup_system output powerpc/vphn: NUMA node code expects big-endian powerpc/msi: Use WARN_ON() in msi bitmap selftests powerpc/msi: Fix the msi bitmap alignment tests powerpc/eeh: Block CFG upon frozen Shiner adapter powerpc/eeh: Don't collect logs on PE with blocked config space powerpc/eeh: Block PCI config access upon frozen PE powerpc/pseries: Drop config requests in EEH accessors powerpc/powernv: Drop config requests in EEH accessors powerpc/eeh: Rename flag EEH_PE_RESET to EEH_PE_CFG_BLOCKED powerpc/eeh: Fix condition for isolated state powerpc/pseries: Make CPU hotplug path endian safe powerpc/pseries: Use dump_stack instead of show_stack powerpc: Rename __get_SP() to current_stack_pointer() powerpc: Reimplement __get_SP() as a function not a define powerpc/numa: Add ability to disable and debug topology updates powerpc/numa: check error return from proc_create powerpc/powernv: Fallback to old HMI handling behavior for old firmware ...
| * powerpc/powernv: Fallback to old HMI handling behavior for old firmwareMahesh Salgaonkar2014-10-131-0/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Recently we moved HMI handling into Linux kernel instead of taking HMI directly in OPAL. This new change is dependent on new OPAL call for HMI recovery which was introduced in newer firmware. While this new change works fine with latest OPAL firmware, we broke the HMI handling if we run newer kernel on old OPAL firmware that results in system hang. This patch fixes this issue by falling back to old HMI behavior on older OPAL firmware. This patch introduces a check for opal token OPAL_HANDLE_HMI to see if we are running on newer firmware or old firmware. On newer firmware this check would return OPAL_TOKEN_PRESENT, otherwise we are running on old firmware and fallback to old HMI behavior. Old firmware: POWER8 System Firmware Release as of today <= SV810_087 Action: Let OPAL handle HMIs Newer firmware: in development/yet to be released. Action: Let Linux host handle HMIs. This patch depends on opal check token patch posted at ppc-devel https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-August/120224.html Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> [mpe: Minor comment and printk rewording] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* | Merge branch 'for-linus' of ↵Linus Torvalds2014-10-121-3/+3
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull powerpc updates from Michael Ellerman: "Here's a first pull request for powerpc updates for 3.18. The bulk of the additions are for the "cxl" driver, for IBM's Coherent Accelerator Processor Interface (CAPI). Most of it's in drivers/misc, which Greg & Arnd maintain, Greg said he was happy for us to take it through our tree. There's the usual minor cleanups and fixes, including a bit of noise in drivers from some of those. A bunch of updates to our EEH code, which has been getting more testing. Several nice speedups from Anton, including 20% in clear_page(). And a bunch of updates for freescale from Scott" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (130 commits) cxl: Fix afu_read() not doing finish_wait() on signal or non-blocking cxl: Add documentation for userspace APIs cxl: Add driver to Kbuild and Makefiles cxl: Add userspace header file cxl: Driver code for powernv PCIe based cards for userspace access cxl: Add base builtin support powerpc/mm: Add hooks for cxl powerpc/opal: Add PHB to cxl mode call powerpc/mm: Add new hash_page_mm() powerpc/powerpc: Add new PCIe functions for allocating cxl interrupts cxl: Add new header for call backs and structs powerpc/powernv: Split out set MSI IRQ chip code powerpc/mm: Export mmu_kernel_ssize and mmu_linear_psize powerpc/msi: Improve IRQ bitmap allocator powerpc/cell: Make spu_flush_all_slbs() generic powerpc/cell: Move data segment faulting code out of cell platform powerpc/cell: Move spu_handle_mm_fault() out of cell platform powerpc/pseries: Use new defines when calling H_SET_MODE powerpc: Update contact info in Documentation files powerpc/perf/hv-24x7: Simplify catalog_read() ...
| * powerpc: Add printk levels to powernv platform codeAnton Blanchard2014-10-021-3/+3
| | | | | | | | | | | | | | | | Add printk levels to powernv platform code, and convert to pr_err() etc while here. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* | Merge branch 'for-linus' of ↵Linus Torvalds2014-10-081-1/+1
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull "trivial tree" updates from Jiri Kosina: "Usual pile from trivial tree everyone is so eagerly waiting for" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) Remove MN10300_PROC_MN2WS0038 mei: fix comments treewide: Fix typos in Kconfig kprobes: update jprobe_example.c for do_fork() change Documentation: change "&" to "and" in Documentation/applying-patches.txt Documentation: remove obsolete pcmcia-cs from Changes Documentation: update links in Changes Documentation: Docbook: Fix generated DocBook/kernel-api.xml score: Remove GENERIC_HAS_IOMAP gpio: fix 'CONFIG_GPIO_IRQCHIP' comments tty: doc: Fix grammar in serial/tty dma-debug: modify check_for_stack output treewide: fix errors in printk genirq: fix reference in devm_request_threaded_irq comment treewide: fix synchronize_rcu() in comments checkstack.pl: port to AArch64 doc: queue-sysfs: minor fixes init/do_mounts: better syntax description MIPS: fix comment spelling powerpc/simpleboot: fix comment ...
| * treewide: fix errors in printkMasanari Iida2014-09-011-1/+1
| | | | | | | | | | | | | | | | | | This patch fix spelling typo in printk. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | powerpc/powernv: Interface to register/unregister opal dump regionVasant Hegde2014-08-131-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | PowerNV platform is capable of capturing host memory region when system crashes (because of host/firmware). We have new OPAL API to register/ unregister memory region to be captured when system crashes. This patch adds support for new API. Also during boot time we register kernel log buffer and unregister before doing kexec. Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/powernv: Invoke opal call to handle hmi.Mahesh Salgaonkar2014-08-051-6/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | When we hit the HMI in Linux, invoke opal call to handle/recover from HMI errors in real mode and then in virtual mode during check_irq_replay() invoke opal_poll_events()/opal_do_notifier() to retrieve HMI event from OPAL and act accordingly. Now that we are ready to handle HMI interrupt directly in linux, remove the HMI interrupt registration with firmware. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/book3s: Add basic infrastructure to handle HMI in Linux.Mahesh Salgaonkar2014-08-051-0/+14
| | | | | | | | | | | | | | | | | | | | Handle Hypervisor Maintenance Interrupt (HMI) in Linux. This patch implements basic infrastructure to handle HMI in Linux host. The design is to invoke opal handle hmi in real mode for recovery and set irq_pending when we hit HMI. During check_irq_replay pull opal hmi event and print hmi info on console. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/powernv: Switch powernv drivers to use machine_xxx_initcall()Michael Ellerman2014-07-281-4/+5
|/ | | | | | | | | | | | | | | | | A lot of the code in platforms/powernv is using non-machine initcalls. That means if a kernel built with powernv support runs on another platform, for example pseries, the initcalls will still run. That is usually OK, because the initcalls will check for something in the device tree or elsewhere before doing anything, so on other platforms they will usually just return. But it's fishy for powernv code to be running on other platforms, so switch them all to be machine initcalls. If we want any of them to run on other platforms in future they should move to sysdev. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge branch 'next' of ↵Linus Torvalds2014-06-111-0/+22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc updates from Ben Herrenschmidt: "Here is the bulk of the powerpc changes for this merge window. It got a bit delayed in part because I wasn't paying attention, and in part because I discovered I had a core PCI change without a PCI maintainer ack in it. Bjorn eventually agreed it was ok to merge it though we'll probably improve it later and I didn't want to rebase to add his ack. There is going to be a bit more next week, essentially fixes that I still want to sort through and test. The biggest item this time is the support to build the ppc64 LE kernel with our new v2 ABI. We previously supported v2 userspace but the kernel itself was a tougher nut to crack. This is now sorted mostly thanks to Anton and Rusty. We also have a fairly big series from Cedric that add support for 64-bit LE zImage boot wrapper. This was made harder by the fact that traditionally our zImage wrapper was always 32-bit, but our new LE toolchains don't really support 32-bit anymore (it's somewhat there but not really "supported") so we didn't want to rely on it. This meant more churn that just endian fixes. This brings some more LE bits as well, such as the ability to run in LE mode without a hypervisor (ie. under OPAL firmware) by doing the right OPAL call to reinitialize the CPU to take HV interrupts in the right mode and the usual pile of endian fixes. There's another series from Gavin adding EEH improvements (one day we *will* have a release with less than 20 EEH patches, I promise!). Another highlight is the support for the "Split core" functionality on P8 by Michael. This allows a P8 core to be split into "sub cores" of 4 threads which allows the subcores to run different guests under KVM (the HW still doesn't support a partition per thread). And then the usual misc bits and fixes ..." [ Further delayed by gmail deciding that BenH is a dirty spammer. Google knows. ] * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (155 commits) powerpc/powernv: Add missing include to LPC code selftests/powerpc: Test the THP bug we fixed in the previous commit powerpc/mm: Check paca psize is up to date for huge mappings powerpc/powernv: Pass buffer size to OPAL validate flash call powerpc/pseries: hcall functions are exported to modules, need _GLOBAL_TOC() powerpc: Exported functions __clear_user and copy_page use r2 so need _GLOBAL_TOC() powerpc/powernv: Set memory_block_size_bytes to 256MB powerpc: Allow ppc_md platform hook to override memory_block_size_bytes powerpc/powernv: Fix endian issues in memory error handling code powerpc/eeh: Skip eeh sysfs when eeh is disabled powerpc: 64bit sendfile is capped at 2GB powerpc/powernv: Provide debugfs access to the LPC bus via OPAL powerpc/serial: Use saner flags when creating legacy ports powerpc: Add cpu family documentation powerpc/xmon: Fix up xmon format strings powerpc/powernv: Add calls to support little endian host powerpc: Document sysfs DSCR interface powerpc: Fix regression of per-CPU DSCR setting powerpc: Split __SYSFS_SPRSETUP macro arch: powerpc/fadump: Cleaning up inconsistent NULL checks ...
| * powerpc/powernv: Add calls to support little endian hostBenjamin Herrenschmidt2014-06-051-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | When running as a powernv "host" system on P8, we need to switch the endianness of interrupt handlers. This does it via the appropriate call to the OPAL firmware which may result in just switching HID0:HILE but depending on the processor version might need to do a few more things. This call must be done early before any other processor has been brought out of firmware. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | Merge branch 'dt-bus-name' into for-nextRob Herring2014-05-141-3/+66
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