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2021-04-30Merge tag 'powerpc-5.13-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Enable KFENCE for 32-bit. - Implement EBPF for 32-bit. - Convert 32-bit to do interrupt entry/exit in C. - Convert 64-bit BookE to do interrupt entry/exit in C. - Changes to our signal handling code to use user_access_begin/end() more extensively. - Add support for time namespaces (CONFIG_TIME_NS) - A series of fixes that allow us to reenable STRICT_KERNEL_RWX. - Other smaller features, fixes & cleanups. Thanks to Alexey Kardashevskiy, Andreas Schwab, Andrew Donnellan, Aneesh Kumar K.V, Athira Rajeev, Bhaskar Chowdhury, Bixuan Cui, Cédric Le Goater, Chen Huang, Chris Packham, Christophe Leroy, Christopher M. Riedl, Colin Ian King, Dan Carpenter, Daniel Axtens, Daniel Henrique Barboza, David Gibson, Davidlohr Bueso, Denis Efremov, dingsenjie, Dmitry Safonov, Dominic DeMarco, Fabiano Rosas, Ganesh Goudar, Geert Uytterhoeven, Geetika Moolchandani, Greg Kurz, Guenter Roeck, Haren Myneni, He Ying, Jiapeng Chong, Jordan Niethe, Laurent Dufour, Lee Jones, Leonardo Bras, Li Huafei, Madhavan Srinivasan, Mahesh Salgaonkar, Masahiro Yamada, Nathan Chancellor, Nathan Lynch, Nicholas Piggin, Oliver O'Halloran, Paul Menzel, Pu Lehui, Randy Dunlap, Ravi Bangoria, Rosen Penev, Russell Currey, Santosh Sivaraj, Sebastian Andrzej Siewior, Segher Boessenkool, Shivaprasad G Bhat, Srikar Dronamraju, Stephen Rothwell, Thadeu Lima de Souza Cascardo, Thomas Gleixner, Tony Ambardar, Tyrel Datwyler, Vaibhav Jain, Vincenzo Frascino, Xiongwei Song, Yang Li, Yu Kuai, and Zhang Yunkai. * tag 'powerpc-5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (302 commits) powerpc/signal32: Fix erroneous SIGSEGV on RT signal return powerpc: Avoid clang uninitialized warning in __get_user_size_allowed powerpc/papr_scm: Mark nvdimm as unarmed if needed during probe powerpc/kvm: Fix build error when PPC_MEM_KEYS/PPC_PSERIES=n powerpc/kasan: Fix shadow start address with modules powerpc/kernel/iommu: Use largepool as a last resort when !largealloc powerpc/kernel/iommu: Align size for IOMMU_PAGE_SIZE() to save TCEs powerpc/44x: fix spelling mistake in Kconfig "varients" -> "variants" powerpc/iommu: Annotate nested lock for lockdep powerpc/iommu: Do not immediately panic when failed IOMMU table allocation powerpc/iommu: Allocate it_map by vmalloc selftests/powerpc: remove unneeded semicolon powerpc/64s: remove unneeded semicolon powerpc/eeh: remove unneeded semicolon powerpc/selftests: Add selftest to test concurrent perf/ptrace events powerpc/selftests/perf-hwbreak: Add testcases for 2nd DAWR powerpc/selftests/perf-hwbreak: Coalesce event creation code powerpc/selftests/ptrace-hwbreak: Add testcases for 2nd DAWR powerpc/configs: Add IBMVNIC to some 64-bit configs selftests/powerpc: Add uaccess flush test ...
2021-04-20Documentation/powerpc: Add proper links for manual and testsHaren Myneni
The links that are mentioned in this document are no longer valid. So changed the proper links for NXGZIP user manual and test cases. Reported-by: Bulent Abali <abali@us.ibm.com> Signed-off-by: Haren Myneni <haren@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/08511c1e92ac239f20ac88c73c59d1f8cf02e6ad.camel@linux.ibm.com
2021-04-14powerpc/papr_scm: Implement support for H_SCM_FLUSH hcallShivaprasad G Bhat
Add support for ND_REGION_ASYNC capability if the device tree indicates 'ibm,hcall-flush-required' property in the NVDIMM node. Flush is done by issuing H_SCM_FLUSH hcall to the hypervisor. If the flush request failed, the hypervisor is expected to to reflect the problem in the subsequent nvdimm H_SCM_HEALTH call. This patch prevents mmap of namespaces with MAP_SYNC flag if the nvdimm requires an explicit flush[1]. References: [1] https://github.com/avocado-framework-tests/avocado-misc-tests/blob/master/memory/ndctl.py.data/map_sync.c Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> [mpe: Use unsigned long / long instead of uint64_t/int64_t] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/161703936121.36.7260632399582101498.stgit@e1fbed493c87
2021-03-31docs: powerpc: Fix misspellings and grammar errorsHe Ying
Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: He Ying <heying24@huawei.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210326100853.173586-1-heying24@huawei.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-03-25docs: powerpc: Fix a typoBhaskar Chowdhury
s/struture/structure/ Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20210322062237.2971314-1-unixbhaskar@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-02-25docs: powerpc: Fix tables in syscall64-abi.rstAndrew Donnellan
Commit 209b44c804c ("docs: powerpc: syscall64-abi.rst: fix a malformed table") attempted to fix the formatting of tables in syscall64-abi.rst, but inadvertently changed some register names. Redo the tables with the correct register names, and while we're here, clean things up to separate the registers into different rows and add headings. Fixes: 209b44c804c ("docs: powerpc: syscall64-abi.rst: fix a malformed table") Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com> Link: https://lore.kernel.org/r/20210225060857.16083-1-ajd@linux.ibm.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-03docs: archis: add a per-architecture features listMauro Carvalho Chehab
Add a feature list matrix for each architecture to their respective Kernel books. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/9c39d4dd93e05c0008205527d2c3450912f029ed.1606748711.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-10-16Merge tag 'docs/v5.10-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull documentation updates from Mauro Carvalho Chehab: "A series of patches addressing warnings produced by make htmldocs. This includes: - kernel-doc markup fixes - ReST fixes - Updates at the build system in order to support newer versions of the docs build toolchain (Sphinx) After this series, the number of html build warnings should reduce significantly, and building with Sphinx 3.1 or later should now be supported (although it is still recommended to use Sphinx 2.4.4). As agreed with Jon, I should be sending you a late pull request by the end of the merge window addressing remaining issues with docs build, as there are a number of warning fixes that depends on pull requests that should be happening along the merge window. The end goal is to have a clean htmldocs build on Kernel 5.10. PS. It should be noticed that Sphinx 3.0 is not currently supported, as it lacks support for C domain namespaces. Such feature, needed in order to document uAPI system calls with Sphinx 3.x, was added only on Sphinx 3.1" * tag 'docs/v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (75 commits) PM / devfreq: remove a duplicated kernel-doc markup mm/doc: fix a literal block markup workqueue: fix a kernel-doc warning docs: virt: user_mode_linux_howto_v2.rst: fix a literal block markup Input: sparse-keymap: add a description for @sw rcu/tree: docs: document bkvcache new members at struct kfree_rcu_cpu nl80211: docs: add a description for s1g_cap parameter usb: docs: document altmode register/unregister functions kunit: test.h: fix a bad kernel-doc markup drivers: core: fix kernel-doc markup for dev_err_probe() docs: bio: fix a kerneldoc markup kunit: test.h: solve kernel-doc warnings block: bio: fix a warning at the kernel-doc markups docs: powerpc: syscall64-abi.rst: fix a malformed table drivers: net: hamradio: fix document location net: appletalk: Kconfig: Fix docs location dt-bindings: fix references to files converted to yaml memblock: get rid of a :c:type leftover math64.h: kernel-docs: Convert some markups into normal comments media: uAPI: buffer.rst: remove a left-over documentation ...
2020-10-16Merge tag 'powerpc-5.10-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - A series from Nick adding ARCH_WANT_IRQS_OFF_ACTIVATE_MM & selecting it for powerpc, as well as a related fix for sparc. - Remove support for PowerPC 601. - Some fixes for watchpoints & addition of a new ptrace flag for detecting ISA v3.1 (Power10) watchpoint features. - A fix for kernels using 4K pages and the hash MMU on bare metal Power9 systems with > 16TB of RAM, or RAM on the 2nd node. - A basic idle driver for shallow stop states on Power10. - Tweaks to our sched domains code to better inform the scheduler about the hardware topology on Power9/10, where two SMT4 cores can be presented by firmware as an SMT8 core. - A series doing further reworks & cleanups of our EEH code. - Addition of a filter for RTAS (firmware) calls done via sys_rtas(), to prevent root from overwriting kernel memory. - Other smaller features, fixes & cleanups. Thanks to: Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Athira Rajeev, Biwen Li, Cameron Berkenpas, Cédric Le Goater, Christophe Leroy, Christoph Hellwig, Colin Ian King, Daniel Axtens, David Dai, Finn Thain, Frederic Barrat, Gautham R. Shenoy, Greg Kurz, Gustavo Romero, Ira Weiny, Jason Yan, Joel Stanley, Jordan Niethe, Kajol Jain, Konrad Rzeszutek Wilk, Laurent Dufour, Leonardo Bras, Liu Shixin, Luca Ceresoli, Madhavan Srinivasan, Mahesh Salgaonkar, Nathan Lynch, Nicholas Mc Guire, Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Pedro Miraglia Franco de Carvalho, Pratik Rajesh Sampat, Qian Cai, Qinglang Miao, Ravi Bangoria, Russell Currey, Satheesh Rajendran, Scott Cheloha, Segher Boessenkool, Srikar Dronamraju, Stan Johnson, Stephen Kitt, Stephen Rothwell, Thiago Jung Bauermann, Tyrel Datwyler, Vaibhav Jain, Vaidyanathan Srinivasan, Vasant Hegde, Wang Wensheng, Wolfram Sang, Yang Yingliang, zhengbin. * tag 'powerpc-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (228 commits) Revert "powerpc/pci: unmap legacy INTx interrupts when a PHB is removed" selftests/powerpc: Fix eeh-basic.sh exit codes cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_reboot_notifier powerpc/time: Make get_tb() common to PPC32 and PPC64 powerpc/time: Make get_tbl() common to PPC32 and PPC64 powerpc/time: Remove get_tbu() powerpc/time: Avoid using get_tbl() and get_tbu() internally powerpc/time: Make mftb() common to PPC32 and PPC64 powerpc/time: Rename mftbl() to mftb() powerpc/32s: Remove #ifdef CONFIG_PPC_BOOK3S_32 in head_book3s_32.S powerpc/32s: Rename head_32.S to head_book3s_32.S powerpc/32s: Setup the early hash table at all time. powerpc/time: Remove ifdef in get_dec() and set_dec() powerpc: Remove get_tb_or_rtc() powerpc: Remove __USE_RTC() powerpc: Tidy up a bit after removal of PowerPC 601. powerpc: Remove support for PowerPC 601 powerpc: Remove PowerPC 601 powerpc: Drop SYNC_601() ISYNC_601() and SYNC() powerpc: Remove CONFIG_PPC601_SYNC_FIX ...
2020-10-15docs: powerpc: syscall64-abi.rst: fix a malformed tableMauro Carvalho Chehab
As reported: Documentation/powerpc/syscall64-abi.rst:53: WARNING: Malformed table. Text in column margin in table line 2. =========== ============= ======================================== --- For the sc instruction, differences with the ELF ABI --- r0 Volatile (System call number.) This table requires a different notation to be valid. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-10-14Merge tag 'devicetree-for-5.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree updates from Rob Herring: - Update dtc to upstream version v1.6.0-31-gcbca977ea121 - dtx_diff help text reformatting - Speed-up validation time for binding and dtb checks using json for intermediate files - Add support for running yamllint on DT schema files - Remove old booting-without-of.rst - Extend the example schema to address common issues - Cleanup handling of additionalProperties/unevaluatedProperties - Ensure all DSI controller schemas reference dsi-controller.yaml - Vendor prefixes for Zealz, Wandbord/Technexion, Embest RIoT, Rex, DFI, and Cisco Meraki - Convert at25, SPMI bus, TI hwlock, HiSilicon Hi3660 USB3 PHY, Arm SP805 watchdog, Arm SP804, and Samsung 11-pin USB connector to DT schema - Convert HiSilicon SoC and syscon bindings to DT schema - Convert SiFive Risc-V L2 cache, PLIC, PRCI, and PWM to DT schema - Convert i.MX bindings for w1, crypto, rng, SIM, PM, DDR, SATA, vf610 GPIO, and UART to DT schema - Add i.MX 8M compatible strings - Add LM81 and DS1780 as trivial devices - Various missing properties added to fix dtb validation warnings * tag 'devicetree-for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (111 commits) dt-bindings: misc: explicitly add #address-cells for slave mode spi: dt-bindings: spi-controller: explicitly require #address-cells=<0> for slave mode dt: Remove booting-without-of.rst dt-bindings: update usb-c-connector example dt-bindings: arm: hisilicon: add missing properties into cpuctrl.yaml dt-bindings: arm: hisilicon: add missing properties into sysctrl.yaml dt-bindings: pwm: imx: document i.MX compatibles scripts/dtc: Update to upstream version v1.6.0-31-gcbca977ea121 dt-bindings: Add running yamllint to dt_binding_check dt-bindings: powerpc: Add a schema for the 'sleep' property dt-bindings: pinctrl: sirf: Fix typo abitrary dt-bindings: pinctrl: qcom: Fix typo abitrary dt-bindings: Explicitly allow additional properties in common schemas dt-bindings: Use 'additionalProperties' instead of 'unevaluatedProperties' dt-bindings: Add missing 'unevaluatedProperties' Docs: Fixing spelling errors in Documentation/devicetree/bindings/ dt-bindings: arm: hisilicon: convert Hi6220 domain controller bindings to json-schema dt-bindings: riscv: convert pwm bindings to json-schema dt-bindings: riscv: convert plic bindings to json-schema dt-bindings: fu540: prci: convert PRCI bindings to json-schema ...
2020-10-13dt: Remove booting-without-of.rstRob Herring
booting-without-of.rst is an ancient document that first outlined Flattened DeviceTree on PowerPC initially. The DT world has evolved a lot in the 15 years since and booting-without-of.rst is pretty stale. The name of the document itself is confusing if you don't understand the evolution from real 'OpenFirmware'. Most of what booting-without-of.rst contains is now in the DT specification (which evolved out of the ePAPR). The few things that weren't documented in the DT specification are now. All that remains is the boot entry details, so let's move these to arch specific documents. The exception is arm which already has the same details documented. Cc: Frank Rowand <frowand.list@gmail.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-mips@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-sh@vger.kernel.org Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Borislav Petkov <bp@suse.de> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Signed-off-by: Rob Herring <robh@kernel.org>
2020-09-15powerpc/watchpoint/ptrace: Introduce PPC_DEBUG_FEATURE_DATA_BP_ARCH_31Ravi Bangoria
PPC_DEBUG_FEATURE_DATA_BP_ARCH_31 can be used to determine whether we are running on an ISA 3.1 compliant machine. Which is needed to determine DAR behaviour, 512 byte boundary limit etc. This was requested by Pedro Miraglia Franco de Carvalho for extending watchpoint features in gdb. Note that availability of 2nd DAWR is independent of this flag and should be checked using ppc_debug_info->num_data_bps. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200902042945.129369-8-ravi.bangoria@linux.ibm.com
2020-09-14Merge branch 'fixes' into nextMichael Ellerman
Bring in our fixes branch for this cycle which avoids some small conflicts with upcoming commits.
2020-09-08powerpc: Update documentation of ISA versions for Power10Jordan Niethe
Update the CPU to ISA Version Mapping document to include Power10 and ISA v3.1. Signed-off-by: Jordan Niethe <jniethe5@gmail.com> [mpe: Make sure ISA reference is unique] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200827040556.1783-1-jniethe5@gmail.com
2020-08-27Documentation/powerpc: fix malformed table in syscall64-abiRandy Dunlap
Fix malformed table warning in powerpc/syscall64-abi.rst by making two tables and moving the headings. Documentation/powerpc/syscall64-abi.rst:53: WARNING: Malformed table. Text in column margin in table line 2. =========== ============= ======================================== --- For the sc instruction, differences with the ELF ABI --- r0 Volatile (System call number.) r3 Volatile (Parameter 1, and return value.) r4-r8 Volatile (Parameters 2-6.) cr0 Volatile (cr0.SO is the return error condition.) cr1, cr5-7 Nonvolatile lr Nonvolatile --- For the scv 0 instruction, differences with the ELF ABI --- r0 Volatile (System call number.) r3 Volatile (Parameter 1, and return value.) r4-r8 Volatile (Parameters 2-6.) =========== ============= ======================================== Fixes: 7fa95f9adaee ("powerpc/64s: system call support for scv/rfscv instructions") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/e06de4d3-a36f-2745-9775-467e125436cc@infradead.org
2020-08-09Merge tag 'kvm-ppc-next-5.9-1' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-next-5.6 PPC KVM update for 5.9 - Improvements and bug-fixes for secure VM support, giving reduced startup time and memory hotplug support. - Locking fixes in nested KVM code - Increase number of guests supported by HV KVM to 4094 - Preliminary POWER10 support
2020-08-07Merge tag 'powerpc-5.9-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Add support for (optionally) using queued spinlocks & rwlocks. - Support for a new faster system call ABI using the scv instruction on Power9 or later. - Drop support for the PROT_SAO mmap/mprotect flag as it will be unsupported on Power10 and future processors, leaving us with no way to implement the functionality it requests. This risks breaking userspace, though we believe it is unused in practice. - A bug fix for, and then the removal of, our custom stack expansion checking. We now allow stack expansion up to the rlimit, like other architectures. - Remove the remnants of our (previously disabled) topology update code, which tried to react to NUMA layout changes on virtualised systems, but was prone to crashes and other problems. - Add PMU support for Power10 CPUs. - A change to our signal trampoline so that we don't unbalance the link stack (branch return predictor) in the signal delivery path. - Lots of other cleanups, refactorings, smaller features and so on as usual. Thanks to: Abhishek Goel, Alastair D'Silva, Alexander A. Klimov, Alexey Kardashevskiy, Alistair Popple, Andrew Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Anton Blanchard, Arnd Bergmann, Athira Rajeev, Balamuruhan S, Bharata B Rao, Bill Wendling, Bin Meng, Cédric Le Goater, Chris Packham, Christophe Leroy, Christoph Hellwig, Daniel Axtens, Dan Williams, David Lamparter, Desnes A. Nunes do Rosario, Erhard F., Finn Thain, Frederic Barrat, Ganesh Goudar, Gautham R. Shenoy, Geoff Levand, Greg Kurz, Gustavo A. R. Silva, Hari Bathini, Harish, Imre Kaloz, Joel Stanley, Joe Perches, John Crispin, Jordan Niethe, Kajol Jain, Kamalesh Babulal, Kees Cook, Laurent Dufour, Leonardo Bras, Li RongQing, Madhavan Srinivasan, Mahesh Salgaonkar, Mark Cave-Ayland, Michal Suchanek, Milton Miller, Mimi Zohar, Murilo Opsfelder Araujo, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nayna Jain, Nicholas Piggin, Oliver O'Halloran, Palmer Dabbelt, Pedro Miraglia Franco de Carvalho, Philippe Bergheaud, Pingfan Liu, Pratik Rajesh Sampat, Qian Cai, Qinglang Miao, Randy Dunlap, Ravi Bangoria, Sachin Sant, Sam Bobroff, Sandipan Das, Santosh Sivaraj, Satheesh Rajendran, Shirisha Ganta, Sourabh Jain, Srikar Dronamraju, Stan Johnson, Stephen Rothwell, Thadeu Lima de Souza Cascardo, Thiago Jung Bauermann, Tom Lane, Vaibhav Jain, Vladis Dronov, Wei Yongjun, Wen Xiong, YueHaibing. * tag 'powerpc-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (337 commits) selftests/powerpc: Fix pkey syscall redefinitions powerpc: Fix circular dependency between percpu.h and mmu.h powerpc/powernv/sriov: Fix use of uninitialised variable selftests/powerpc: Skip vmx/vsx/tar/etc tests on older CPUs powerpc/40x: Fix assembler warning about r0 powerpc/papr_scm: Add support for fetching nvdimm 'fuel-gauge' metric powerpc/papr_scm: Fetch nvdimm performance stats from PHYP cpuidle: pseries: Fixup exit latency for CEDE(0) cpuidle: pseries: Add function to parse extended CEDE records cpuidle: pseries: Set the latency-hint before entering CEDE selftests/powerpc: Fix online CPU selection powerpc/perf: Consolidate perf_callchain_user_[64|32]() powerpc/pseries/hotplug-cpu: Remove double free in error path powerpc/pseries/mobility: Add pr_debug() for device tree changes powerpc/pseries/mobility: Set pr_fmt() powerpc/cacheinfo: Warn if cache object chain becomes unordered powerpc/cacheinfo: Improve diagnostics about malformed cache lists powerpc/cacheinfo: Use name@unit instead of full DT path in debug messages powerpc/cacheinfo: Set pr_fmt() powerpc: fix function annotations to avoid section mismatch warnings with gcc-10 ...
2020-08-04Merge tag 'docs-5.9' of git://git.lwn.net/linuxLinus Torvalds
Pull documentation updates from Jonathan Corbet: "It's been a busy cycle for documentation - hopefully the busiest for a while to come. Changes include: - Some new Chinese translations - Progress on the battle against double words words and non-HTTPS URLs - Some block-mq documentation - More RST conversions from Mauro. At this point, that task is essentially complete, so we shouldn't see this kind of churn again for a while. Unless we decide to switch to asciidoc or something...:) - Lots of typo fixes, warning fixes, and more" * tag 'docs-5.9' of git://git.lwn.net/linux: (195 commits) scripts/kernel-doc: optionally treat warnings as errors docs: ia64: correct typo mailmap: add entry for <alobakin@marvell.com> doc/zh_CN: add cpu-load Chinese version Documentation/admin-guide: tainted-kernels: fix spelling mistake MAINTAINERS: adjust kprobes.rst entry to new location devices.txt: document rfkill allocation PCI: correct flag name docs: filesystems: vfs: correct flag name docs: filesystems: vfs: correct sync_mode flag names docs: path-lookup: markup fixes for emphasis docs: path-lookup: more markup fixes docs: path-lookup: fix HTML entity mojibake CREDITS: Replace HTTP links with HTTPS ones docs: process: Add an example for creating a fixes tag doc/zh_CN: add Chinese translation prefer section doc/zh_CN: add clearing-warn-once Chinese version doc/zh_CN: add admin-guide index doc:it_IT: process: coding-style.rst: Correct __maybe_unused compiler label futex: MAINTAINERS: Re-add selftests directory ...
2020-07-28KVM: PPC: Book3S HV: In H_SVM_INIT_DONE, migrate remaining normal-GFNs to ↵Ram Pai
secure-GFNs The Ultravisor is expected to explicitly call H_SVM_PAGE_IN for all the pages of the SVM before calling H_SVM_INIT_DONE. This causes a huge delay in tranistioning the VM to SVM. The Ultravisor is only interested in the pages that contain the kernel, initrd and other important data structures. The rest contain throw-away content. However if not all pages are requested by the Ultravisor, the Hypervisor continues to consider the GFNs corresponding to the non-requested pages as normal GFNs. This can lead to data-corruption and undefined behavior. In H_SVM_INIT_DONE handler, move all the PFNs associated with the SVM's GFNs to secure-PFNs. Skip the GFNs that are already Paged-in or Shared or Paged-in followed by a Paged-out. Reviewed-by: Bharata B Rao <bharata@linux.ibm.com> Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2020-07-28KVM: PPC: Book3S HV: Disable page merging in H_SVM_INIT_STARTRam Pai
Page-merging of pages in memory-slots associated with a Secure VM is disabled in H_SVM_PAGE_IN handler. This operation should have been done the much earlier; the moment the VM is initiated for secure-transition. Delaying this operation increases the probability for those pages to acquire new references, making it impossible to migrate those pages in H_SVM_PAGE_IN handler. Disable page-migration in H_SVM_INIT_START handling. Reviewed-by: Bharata B Rao <bharata@linux.ibm.com> Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2020-07-23Merge branch 'scv' support into nextMichael Ellerman
From Nick's cover letter: Linux powerpc new system call instruction and ABI System Call Vectored (scv) ABI ============================== The scv instruction is introduced with POWER9 / ISA3, it comes with an rfscv counter-part. The benefit of these instructions is performance (trading slower SRR0/1 with faster LR/CTR registers, and entering the kernel with MSR[EE] and MSR[RI] left enabled, which can reduce MSR updates. The scv instruction has 128 levels (not enough to cover the Linux system call space). Assignment and advertisement ---------------------------- The proposal is to assign scv levels conservatively, and advertise them with HWCAP feature bits as we add support for more. Linux has not enabled FSCR[SCV] yet, so executing the scv instruction will cause the kernel to log a "SCV facility unavilable" message, and deliver a SIGILL with ILL_ILLOPC to the process. Linux has defined a HWCAP2 bit PPC_FEATURE2_SCV for SCV support, but does not set it. This change allocates the zero level ('scv 0'), advertised with PPC_FEATURE2_SCV, which will be used to provide normal Linux system calls (equivalent to 'sc'). Attempting to execute scv with other levels will cause a SIGILL to be delivered the same as before, but will not log a "SCV facility unavailable" message (because the processor facility is enabled). Calling convention ------------------ The proposal is for scv 0 to provide the standard Linux system call ABI with the following differences from sc convention[1]: - LR is to be volatile across scv calls. This is necessary because the scv instruction clobbers LR. From previous discussion, this should be possible to deal with in GCC clobbers and CFI. - cr1 and cr5-cr7 are volatile. This matches the C ABI and would allow the kernel system call exit to avoid restoring the volatile cr registers (although we probably still would anyway to avoid information leaks). - Error handling: The consensus among kernel, glibc, and musl is to move to using negative return values in r3 rather than CR0[SO]=1 to indicate error, which matches most other architectures, and is closer to a function call. Notes ----- - r0,r4-r8 are documented as volatile in the ABI, but the kernel patch as submitted currently preserves them. This is to leave room for deciding which way to go with these. Some small benefit was found by preserving them[1] but I'm not convinced it's worth deviating from the C function call ABI just for this. Release code should follow the ABI. Previous discussions: https://lists.ozlabs.org/pipermail/linuxppc-dev/2020-April/208691.html https://lists.ozlabs.org/pipermail/linuxppc-dev/2020-April/209268.html [1] https://github.com/torvalds/linux/blob/master/Documentation/powerpc/syscall64-abi.rst [2] https://lists.ozlabs.org/pipermail/linuxppc-dev/2020-April/209263.html
2020-07-22powerpc/64s: system call support for scv/rfscv instructionsNicholas Piggin
Add support for the scv instruction on POWER9 and later CPUs. For now this implements the zeroth scv vector 'scv 0', as identical to 'sc' system calls, with the exception that LR is not preserved, nor are volatile CR registers, and error is not indicated with CR0[SO], but by returning a negative errno. rfscv is implemented to return from scv type system calls. It can not be used to return from sc system calls because those are defined to preserve LR. getpid syscall throughput on POWER9 is improved by 26% (428 to 318 cycles), largely due to reducing mtmsr and mtspr. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Fix ppc64e build] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200611081203.995112-3-npiggin@gmail.com
2020-07-22powerpc: Replace HTTP links with HTTPS onesAlexander A. Klimov
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200718103958.5455-1-grandmaster@al2klimov.de
2020-07-18Merge branch 'fixes' into nextMichael Ellerman
Merge our fixes branch, primarily to bring in the ebb selftests build fix and the pkey fix, which is a dependency for some future work.
2020-07-15powerpc/vas: Report proper error code for address translation failureHaren Myneni
P9 DD2 NX workbook (Table 4-36) says DMA controller uses CC=5 internally for translation fault handling. NX reserves CC=250 for OS to notify user space when NX encounters address translation failure on the request buffer. Not an issue in earlier releases as NX does not get faults on kernel addresses. This patch defines CSB_CC_FAULT_ADDRESS(250) and updates CSB.CC with this proper error code for user space. Fixes: c96c4436aba4 ("powerpc/vas: Update CSB and notify process for fault CRBs") Signed-off-by: Haren Myneni <haren@linux.ibm.com> [mpe: Added Fixes tag and fix typo in comment] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/019fd53e7538c6f8f332d175df74b1815ef5aa8c.camel@linux.ibm.com
2020-07-15docs: powerpc: Clarify book3s/32 MMU familiesChristophe Leroy
Documentation wrongly tells that book3s/32 CPU have hash MMU. 603 and e300 core only have software loaded TLB. 755, 7450 family and e600 core have both hash MMU and software loaded TLB. This can be selected by setting a bit in HID2 (755) or HID0 (others). At the time being this is not supported by the kernel. Make this explicit in the documentation. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/261923c075d1cb49d02493685e8585d4ea2a5197.1593698951.git.christophe.leroy@csgroup.eu
2020-07-13Documentation: powerpc/vas-api: eliminate duplicated wordRandy Dunlap
Drop the doubled word "the". Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Link: https://lore.kernel.org/r/20200707180414.10467-16-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-06-26docs: powerpc: fix some issues at vas-api.rstMauro Carvalho Chehab
There are a few issues on this document, when built via the building with ``make htmldocs``: Documentation/powerpc/vas-api.rst:116: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:116: WARNING: Inline emphasis start-string without end-string. Documentation/powerpc/vas-api.rst:117: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:117: WARNING: Inline emphasis start-string without end-string. Documentation/powerpc/vas-api.rst:120: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:124: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:133: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:135: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:150: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:151: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:161: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:176: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:253: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:253: WARNING: Inline emphasis start-string without end-string. Documentation/powerpc/vas-api.rst:259: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:261: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:266: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:267: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:270: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:271: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:273: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:274: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:277: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:278: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:280: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:287: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:289: WARNING: Block quote ends without a blank line; unexpected unindent. Fixes: c12e38b1d52e ("Documentation/powerpc: VAS API") Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/fc1138e563bc3a41a9e59b5dd1fe2f6a4bfad253.1592895969.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-06-19docs: powerpc: convert vcpudispatch_stats.txt to ReSTMauro Carvalho Chehab
- Add a SPDX header; - Use standard markup for document title; - Adjust identation on lists and add blank lines where needed; - Add it to the powerpc index.rst file. Acked-by: Michael Ellerman <mpe@ellerman.id.au> # powerpc Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/a88855cc8b3a97b9b918a33e78e9ad000cf64be1.1592203650.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-06-15powerpc: Document details on H_SCM_HEALTH hcallVaibhav Jain
Add documentation to 'papr_hcalls.rst' describing the bitmap flags that are returned from H_SCM_HEALTH hcall as per the PAPR-SCM specification. Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com> Acked-by: Ira Weiny <ira.weiny@intel.com> Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Ira Weiny <ira.weiny@intel.com> Link: https://lore.kernel.org/r/20200615124407.32596-2-vaibhav@linux.ibm.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2020-06-05Merge tag 'powerpc-5.8-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Support for userspace to send requests directly to the on-chip GZIP accelerator on Power9. - Rework of our lockless page table walking (__find_linux_pte()) to make it safe against parallel page table manipulations without relying on an IPI for serialisation. - A series of fixes & enhancements to make our machine check handling more robust. - Lots of plumbing to add support for "prefixed" (64-bit) instructions on Power10. - Support for using huge pages for the linear mapping on 8xx (32-bit). - Remove obsolete Xilinx PPC405/PPC440 support, and an associated sound driver. - Removal of some obsolete 40x platforms and associated cruft. - Initial support for booting on Power10. - Lots of other small features, cleanups & fixes. Thanks to: Alexey Kardashevskiy, Alistair Popple, Andrew Donnellan, Andrey Abramov, Aneesh Kumar K.V, Balamuruhan S, Bharata B Rao, Bulent Abali, Cédric Le Goater, Chen Zhou, Christian Zigotzky, Christophe JAILLET, Christophe Leroy, Dmitry Torokhov, Emmanuel Nicolet, Erhard F., Gautham R. Shenoy, Geoff Levand, George Spelvin, Greg Kurz, Gustavo A. R. Silva, Gustavo Walbon, Haren Myneni, Hari Bathini, Joel Stanley, Jordan Niethe, Kajol Jain, Kees Cook, Leonardo Bras, Madhavan Srinivasan., Mahesh Salgaonkar, Markus Elfring, Michael Neuling, Michal Simek, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Oliver O'Halloran, Paul Mackerras, Pingfan Liu, Qian Cai, Ram Pai, Raphael Moreira Zinsly, Ravi Bangoria, Sam Bobroff, Sandipan Das, Segher Boessenkool, Stephen Rothwell, Sukadev Bhattiprolu, Tyrel Datwyler, Wolfram Sang, Xiongfeng Wang. * tag 'powerpc-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (299 commits) powerpc/pseries: Make vio and ibmebus initcalls pseries specific cxl: Remove dead Kconfig options powerpc: Add POWER10 architected mode powerpc/dt_cpu_ftrs: Add MMA feature powerpc/dt_cpu_ftrs: Enable Prefixed Instructions powerpc/dt_cpu_ftrs: Advertise support for ISA v3.1 if selected powerpc: Add support for ISA v3.1 powerpc: Add new HWCAP bits powerpc/64s: Don't set FSCR bits in INIT_THREAD powerpc/64s: Save FSCR to init_task.thread.fscr after feature init powerpc/64s: Don't let DT CPU features set FSCR_DSCR powerpc/64s: Don't init FSCR_DSCR in __init_FSCR() powerpc/32s: Fix another build failure with CONFIG_PPC_KUAP_DEBUG powerpc/module_64: Use special stub for _mcount() with -mprofile-kernel powerpc/module_64: Simplify check for -mprofile-kernel ftrace relocations powerpc/module_64: Consolidate ftrace code powerpc/32: Disable KASAN with pages bigger than 16k powerpc/uaccess: Don't set KUEP by default on book3s/32 powerpc/uaccess: Don't set KUAP by default on book3s/32 powerpc/8xx: Reduce time spent in allow_user_access() and friends ...
2020-05-28powerpc: Remove Xilinx PPC405/PPC440 supportMichal Simek
The latest Xilinx design tools called ISE and EDK has been released in October 2013. New tool doesn't support any PPC405/PPC440 new designs. These platforms are no longer supported and tested. PowerPC 405/440 port is orphan from 2013 by commit cdeb89943bfc ("MAINTAINERS: Fix incorrect status tag") and commit 19624236cce1 ("MAINTAINERS: Update Grant's email address and maintainership") that's why it is time to remove the support fot these platforms. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8c593895e2cb57d232d85ce4d8c3a1aa7f0869cc.1590079968.git.christophe.leroy@csgroup.eu
2020-05-20powerpc/tm: Document h/rfid and mtmsrd quirkMichael Neuling
The ISA has a quirk that's useful for the Linux implementation. Document it here so others are less likely to trip over it. Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200325040546.3091563-1-mikey@neuling.org
2020-04-20docs: powerpc: cxl.rst: mark two section titles as suchMauro Carvalho Chehab
The User API chapter contains two sub-chapters. Mark them as such. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Acked-by: Andrew Donnellan <ajd@linux.ibm.com> Link: https://lore.kernel.org/r/190d67397cd63e419de8d85b92e8018d48e8c345.1586881715.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-20docs: filesystems: fix renamed referencesMauro Carvalho Chehab
Some filesystem references got broken by a previous patch series I submitted. Address those. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Acked-by: David Sterba <dsterba@suse.com> # fs/affs/Kconfig Link: https://lore.kernel.org/r/57318c53008dbda7f6f4a5a9e5787f4d37e8565a.1586881715.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-20Documentation/powerpc: VAS APIHaren Myneni
Power9 introduced Virtual Accelerator Switchboard (VAS) which allows userspace to communicate with Nest Accelerator (NX) directly. But kernel has to establish channel to NX for userspace. This document describes user space API that application can use to establish communication channel. Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com> Signed-off-by: Haren Myneni <haren@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1587114715.2275.1135.camel@hbabu-laptop
2020-04-05Merge tag 'powerpc-5.7-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Slightly late as I had to rebase mid-week to insert a bug fix: - A large series from Nick for 64-bit to further rework our exception vectors, and rewrite portions of the syscall entry/exit and interrupt return in C. The result is much easier to follow code that is also faster in general. - Cleanup of our ptrace code to split various parts out that had become badly intertwined with #ifdefs over the years. - Changes to our NUMA setup under the PowerVM hypervisor which should hopefully avoid non-sensical topologies which can lead to warnings from the workqueue code and other problems. - MAINTAINERS updates to remove some of our old orphan entries and update the status of others. - Quite a few other small changes and fixes all over the map. Thanks to: Abdul Haleem, afzal mohammed, Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Balamuruhan S, Cédric Le Goater, Chen Zhou, Christophe JAILLET, Christophe Leroy, Christoph Hellwig, Clement Courbet, Daniel Axtens, David Gibson, Douglas Miller, Fabiano Rosas, Fangrui Song, Ganesh Goudar, Gautham R. Shenoy, Greg Kroah-Hartman, Greg Kurz, Gustavo Luiz Duarte, Hari Bathini, Ilie Halip, Jan Kara, Joe Lawrence, Joe Perches, Kajol Jain, Larry Finger, Laurentiu Tudor, Leonardo Bras, Libor Pechacek, Madhavan Srinivasan, Mahesh Salgaonkar, Masahiro Yamada, Masami Hiramatsu, Mauricio Faria de Oliveira, Michael Neuling, Michal Suchanek, Mike Rapoport, Nageswara R Sastry, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Po-Hsu Lin, Pratik Rajesh Sampat, Rasmus Villemoes, Ravi Bangoria, Roman Bolshakov, Sam Bobroff, Sandipan Das, Santosh S, Sedat Dilek, Segher Boessenkool, Shilpasri G Bhat, Sourabh Jain, Srikar Dronamraju, Stephen Rothwell, Tyrel Datwyler, Vaibhav Jain, YueHaibing" * tag 'powerpc-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (158 commits) powerpc: Make setjmp/longjmp signature standard powerpc/cputable: Remove unnecessary copy of cpu_spec->oprofile_type powerpc: Suppress .eh_frame generation powerpc: Drop -fno-dwarf2-cfi-asm powerpc/32: drop unused ISA_DMA_THRESHOLD powerpc/powernv: Add documentation for the opal sensor_groups sysfs interfaces selftests/powerpc: Fix try-run when source tree is not writable powerpc/vmlinux.lds: Explicitly retain .gnu.hash powerpc/ptrace: move ptrace_triggered() into hw_breakpoint.c powerpc/ptrace: create ppc_gethwdinfo() powerpc/ptrace: create ptrace_get_debugreg() powerpc/ptrace: split out ADV_DEBUG_REGS related functions. powerpc/ptrace: move register viewing functions out of ptrace.c powerpc/ptrace: split out TRANSACTIONAL_MEM related functions. powerpc/ptrace: split out SPE related functions. powerpc/ptrace: split out ALTIVEC related functions. powerpc/ptrace: split out VSX related functions. powerpc/ptrace: drop PARAMETER_SAVE_AREA_OFFSET powerpc/ptrace: drop unnecessary #ifdefs CONFIG_PPC64 powerpc/ptrace: remove unused header includes ...
2020-03-20docs: prevent warnings due to autosectionlabelMauro Carvalho Chehab
Changeset 58ad30cf91f0 ("docs: fix reference to core-api/namespaces.rst") enabled a new feature at Sphinx: it will now generate index for each document title, plus to each chapter inside it. There's a drawback, though: one document cannot have two sections with the same name anymore. A followup patch will change the logic of autosectionlabel to avoid most creating references for every single section title, but still we need to be able to reference the chapters inside a document. There are a few places where there are two chapters with the same name. This patch renames one of the chapters, in order to avoid symbol conflict within the same document. PS.: as I don't speach Chinese, I had some help from a friend (Wen Liu) at the Chinese translation for "publishing patches" for this document: Documentation/translations/zh_CN/process/5.Posting.rst Fixes: 58ad30cf91f0 ("docs: fix reference to core-api/namespaces.rst") Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/2bffb91e4a63d41bf5fae1c23e1e8b3bba0b8806.1584716446.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-02-19powerpc/fadump: sysfs for fadump memory reservationSourabh Jain
Add a sys interface to allow querying the memory reserved by FADump for saving the crash dump. Also added Documentation/ABI for the new sysfs file. Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191211160910.21656-7-sourabhjain@linux.ibm.com
2020-02-19Documentation/ABI: Mark /sys/kernel/fadump_* sysfs files deprecatedSourabh Jain
Add a deprecation note in FADump sysfs ABI documentation files and move them from ABI/testing to ABI/obsolete directory. Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> [mpe: Use a proper table to fix errors from the documentation build] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191211160910.21656-6-sourabhjain@linux.ibm.com
2020-02-19powerpc/powernv: Move core and fadump_release_opalcore under new kobjectSourabh Jain
The /sys/firmware/opal/core and /sys/kernel/fadump_release_opalcore sysfs files are used to export and release the OPAL memory on PowerNV platform. let's organize them into a new kobject under /sys/firmware/opal/mpipl/ directory. A symlink is added to maintain the backward compatibility for /sys/firmware/opal/core sysfs file. Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191211160910.21656-5-sourabhjain@linux.ibm.com
2020-02-04Merge tag 'powerpc-5.6-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "A pretty small batch for us, and apologies for it being a bit late, I wanted to sneak Christophe's user_access_begin() series in. Summary: - Implement user_access_begin() and friends for our platforms that support controlling kernel access to userspace. - Enable CONFIG_VMAP_STACK on 32-bit Book3S and 8xx. - Some tweaks to our pseries IOMMU code to allow SVMs ("secure" virtual machines) to use the IOMMU. - Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE to the 32-bit VDSO, and some other improvements. - A series to use the PCI hotplug framework to control opencapi card's so that they can be reset and re-read after flashing a new FPGA image. As well as other minor fixes and improvements as usual. Thanks to: Alastair D'Silva, Alexandre Ghiti, Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Bai Yingjie, Chen Zhou, Christophe Leroy, Frederic Barrat, Greg Kurz, Jason A. Donenfeld, Joel Stanley, Jordan Niethe, Julia Lawall, Krzysztof Kozlowski, Laurent Dufour, Laurentiu Tudor, Linus Walleij, Michael Bringmann, Nathan Chancellor, Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Peter Ujfalusi, Pingfan Liu, Ram Pai, Randy Dunlap, Russell Currey, Sam Bobroff, Sebastian Andrzej Siewior, Shawn Anastasio, Stephen Rothwell, Steve Best, Sukadev Bhattiprolu, Thiago Jung Bauermann, Tyrel Datwyler, Vaibhav Jain" * tag 'powerpc-5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (131 commits) powerpc: configs: Cleanup old Kconfig options powerpc/configs/skiroot: Enable some more hardening options powerpc/configs/skiroot: Disable xmon default & enable reboot on panic powerpc/configs/skiroot: Enable security features powerpc/configs/skiroot: Update for symbol movement only powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV powerpc/configs/skiroot: Drop HID_LOGITECH powerpc/configs: Drop NET_VENDOR_HP which moved to staging powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE powerpc/configs: Drop CONFIG_QLGE which moved to staging powerpc: Do not consider weak unresolved symbol relocations as bad powerpc/32s: Fix kasan_early_hash_table() for CONFIG_VMAP_STACK powerpc: indent to improve Kconfig readability powerpc: Provide initial documentation for PAPR hcalls powerpc: Implement user_access_save() and user_access_restore() powerpc: Implement user_access_begin and friends powerpc/32s: Prepare prevent_user_access() for user_access_end() powerpc/32s: Drop NULL addr verification powerpc/kuap: Fix set direction in allow/prevent_user_access() powerpc/32s: Fix bad_kuap_fault() ...
2020-01-29powerpc: Provide initial documentation for PAPR hcallsVaibhav Jain
This doc patch provides an initial description of the hcall op-codes that are used by Linux kernel running as a guest (LPAR) on top of PowerVM or any other sPAPR compliant hyper-visor (e.g qemu). Apart from documenting the hcalls the doc-patch also provides a rudimentary overview of how hcall ABI, how they are issued with the Linux kernel and how information/control flows between the guest and hypervisor. Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Acked-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Add SPDX tag, add it to index.rst] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190828082729.16695-1-vaibhav@linux.ibm.com
2020-01-17KVM: PPC: Book3S HV: Implement H_SVM_INIT_ABORT hcallSukadev Bhattiprolu
Implement the H_SVM_INIT_ABORT hcall which the Ultravisor can use to abort an SVM after it has issued the H_SVM_INIT_START and before the H_SVM_INIT_DONE hcalls. This hcall could be used when Ultravisor encounters security violations or other errors when starting an SVM. Note that this hcall is different from UV_SVM_TERMINATE ucall which is used by HV to terminate/cleanup an VM that has becore secure. The H_SVM_INIT_ABORT basically undoes operations that were done since the H_SVM_INIT_START hcall - i.e page-out all the VM pages back to normal memory, and terminate the SVM. (If we do not bring the pages back to normal memory, the text/data of the VM would be stuck in secure memory and since the SVM did not go secure, its MSR_S bit will be clear and the VM wont be able to access its pages even to do a clean exit). Based on patches and discussion with Paul Mackerras, Ram Pai and Bharata Rao. Signed-off-by: Ram Pai <linuxram@linux.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com> Signed-off-by: Bharata B Rao <bharata@linux.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2020-01-06powerpc/imc: Add documentation for IMC and trace-modeAnju T Sudhakar
Documentation for IMC (In-Memory Collection Counters) infrastructure and trace-mode of IMC. Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com> [mpe: Convert to rst, minor rewording, make PMI example more concise] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191028100816.6270-1-mpe@ellerman.id.au
2019-11-13powerpc/fsl_booke/32: Document KASLR implementationJason Yan
Add document to explain how we implement KASLR for fsl_booke32. Signed-off-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: Scott Wood <oss@buserror.net> [mpe: Add it to the index as well] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-09-17docs: powerpc: Add missing documentation referenceAdam Zerella
The documentation pages for 'elfnote' and 'ultravisor' are not included in the powerpc documentation index, this generates Sphinx warnings: WARNING: document isn't included in any toctree Additionally, when one includes these missing doc pages, more Sphinx warnings appear. Unused footnote references, syntax highlighting and table of content ordering has been adjusted. Signed-off-by: Adam Zerella <adam.zerella@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190915052905.13431-1-adam.zerella@gmail.com
2019-09-14powerpc/fadump: update documentation about option to release opalcoreHari Bathini
With /sys/firmware/opal/core support available on OPAL based machines and an option to the release memory used by kernel in exporting this core file, update FADump documentation with these details. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/156821382786.5656.13173494907671241231.stgit@hbathini.in.ibm.com
2019-09-14powerpc/fadump: update documentation about CONFIG_PRESERVE_FA_DUMPHari Bathini
Kernel config option CONFIG_PRESERVE_FA_DUMP is introduced to ensure crash data, from previously crash'ed kernel, is preserved. Update documentation with this details. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/156821377195.5656.15840065629705958324.stgit@hbathini.in.ibm.com
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