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* powerpc: Add option to use thin archivesNicholas Piggin2016-11-182-2/+10
| | | | | | | | | | | | | | | | Add an option to use thin archives to build the kernel. Thin archives are explained in commit a5967db9af51 ("kbuild: allow architectures to use thin archives instead of ld -r"). This is a gradual way to introduce the option to testers. Some change to the way we invoke ar is required so it can be used by scripts/link-vmlinux.sh. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Make it an explicit option not dependant on COMPILE_TEST] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/lib: Fix randconfig build failure in sstep.cMichael Ellerman2016-11-181-0/+1
| | | | | | | | | Under some configs we need to explicitly include cpu_has_feature.h, otherwise we fail with: arch/powerpc/lib/sstep.c:1992:7: error: implicit declaration of function 'cpu_has_feature' Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Correct possible read beyond dlpar sysfs bufferNathan Fontenot2016-11-181-45/+97
| | | | | | | | | | | | | | | The pasrsing of data written to the dlpar file in sysfs does not correctly account for the possibility of reading past the end of the buffer. The code assumes that all pieces of the command witten to the sysfs file are present in the form "<resource> <action> <id_type> <id>". Correct this by updating the buffer parsing code to make a local copy and use the strsep() and sysfs_streq() routines to parse the buffer. This patch also separates the parsing code into subroutines for each piece of the command. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/mce: Remove unused but set variableTobias Klauser2016-11-181-3/+0Star
| | | | | | | | | | | | Remove the unused but set variable srr1 in save_mce_event() to fix the following GCC warning when building with 'W=1': arch/powerpc/kernel/mce.c:75:11: warning: variable 'srr1' set but not used It has never been used. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: Fix old style declaration GCC warningsTobias Klauser2016-11-181-2/+2
| | | | | | | | Fix two [-Wold-style-declaration] GCC warnings by moving the inline keyword before the return type. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/64: get rid of MIN_HUGEPTE_SHIFTChristophe Leroy2016-11-184-12/+0Star
| | | | | | | | MIN_HUGEPTE_SHIFT hasn't been used since commit d1837cba5d5d5 ("powerpc/mm: Cleanup initialization of hugepages on powerpc") Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/mm: Correct process and partition table max sizeSuraj Jitindar Singh2016-11-171-2/+2
| | | | | | | | | | | | | | | | | | | | Version 3.00 of the ISA states that the PATS (partition table size) field of the PTCR (partition table control register) and the PRTS (process table size) field of the partition table entry must both be less than or equal to 24. However the actual size of the partition and process tables is equal to 2 to the power of 12 plus the PATS and PRTS fields, respectively. This means that the max allowable size of each of these tables is 2^36 or 64GB for both. Thus when checking the size shift for each we should be checking for values of greater than 36 instead of the current check for shifts larger than 24 and 23. Fixes: 2bfd65e45e877fb5704730244da67c748d28a1b8 Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Reviewed-by: Balbir Singh <bsingharora@gmail.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for TM SPR registersAnshuman Khandual2016-11-174-1/+205
| | | | | | | | | | This patch adds ptrace interface test for TM SPR registers. This also adds ptrace interface based helper functions related to TM SPR registers access. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for VSX, VMX registers in suspended TMAnshuman Khandual2016-11-173-1/+188
| | | | | | | | | This patch adds ptrace interface test for VSX, VMX registers inside suspended TM context. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for VSX, VMX registers in TMAnshuman Khandual2016-11-173-1/+170
| | | | | | | | | | This patch adds ptrace interface test for VSX, VMX registers inside TM context. This also adds ptrace interface based helper functions related to chckpointed VSX, VMX registers access. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for VSX, VMX registersAnshuman Khandual2016-11-176-1/+630
| | | | | | | | | | | This patch adds ptrace interface test for VSX, VMX registers. This also adds ptrace interface based helper functions related to VSX, VMX registers access. This also adds some assembly helper functions related to VSX and VMX registers. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TMAnshuman Khandual2016-11-173-1/+176
| | | | | | | | | This patch adds ptrace interface test for TAR, PPR, DSCR registers inside suspended TM context. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in TMAnshuman Khandual2016-11-173-2/+163
| | | | | | | | | | | This patch adds ptrace interface test for TAR, PPR, DSCR registers inside TM context. This also adds ptrace interface based helper functions related to checkpointed TAR, PPR, DSCR register access. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR registersAnshuman Khandual2016-11-175-2/+370
| | | | | | | | | | This patch adds ptrace interface test for TAR, PPR, DSCR registers. This also adds ptrace interface based helper functions related to TAR, PPR, DSCR register access. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TMAnshuman Khandual2016-11-173-2/+172
| | | | | | | | | This patch adds ptrace interface test for GPR/FPR registers inside suspended TM context. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for GPR/FPR registers in TMAnshuman Khandual2016-11-173-3/+162
| | | | | | | | | | This patch adds ptrace interface test for GPR/FPR registers inside TM context. This adds ptrace interface based helper functions related to checkpointed GPR/FPR access. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add ptrace tests for GPR/FPR registersAnshuman Khandual2016-11-178-1/+781
| | | | | | | | | | | | This patch adds ptrace interface test for GPR/FPR registers. This adds ptrace interface based helper functions related to GPR/FPR access and some assembly helper functions related to GPR/FPR registers. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> [mpe: Add #defines for the new note types when headers don't define them] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Move shared headers into new include dirSimon Guo2016-11-1719-34/+37
| | | | | | | | | | | | There are some functions, especially register related, which can be shared across multiple selftests/powerpc test directories. This patch creates a new include directory to store those shared files, so that the file layout becomes more neat. Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> [mpe: Reworked to move the headers only] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Add more SPR numbers, TM & VMX instructions to ↵Anshuman Khandual2016-11-172-9/+36
| | | | | | | | | | | | | | | | 'reg.h'/'instructions.h' This patch adds SPR number for TAR, PPR, DSCR special purpose registers. It also adds TM, VSX, VMX related instructions which will then be used by patches later in the series. Now that the new DSCR register definitions (SPRN_DSCR_PRIV and SPRN_DSCR) are defined outside this directory, use them instead. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/mm: Dump hash tableRashmica Gupta2016-11-172-1/+553
| | | | | | | | | | | | | Useful to be able to dump the kernel hash page table to check which pages are hashed along with their sizes and other details. Add a debugfs file to check the hash page table. If radix is enabled (and so there is no hash page table) then this file doesn't exist. To use this the PPC_PTDUMP config option must be selected. Signed-off-by: Rashmica Gupta <rashmicy@gmail.com> [mpe: Fix build with SPARSEMEM_VMEMMAP=n & PSERIES=n] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/mm: Dump linux pagetablesRashmica Gupta2016-11-173-0/+453
| | | | | | | | | | | Useful to be able to dump the kernels page tables to check permissions and memory types - derived from arm64's implementation. Add a debugfs file to check the page tables. To use this the PPC_PTDUMP config option must be selected. Signed-off-by: Rashmica Gupta <rashmicy@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Move CMO code from plapr_wrappers.h to platforms/pseriesMichael Ellerman2016-11-175-53/+54
| | | | | | | | | | | | | | | | | Currently there's some CMO (Cooperative Memory Overcommit) code, in plpar_wrappers.h. Some of it is #ifdef CONFIG_PSERIES and some of it isn't. The end result being if a file includes plpar_wrappers.h it won't build with CONFIG_PSERIES=n. Fix it by moving the CMO code into platforms/pseries. The two hcall wrappers can just be moved into their only caller, cmm.c, and the accessors can go in pseries.h. Note we need the accessors because cmm.c can be built as a module, so there needs to be a split between the built-in code vs the module, and that's achieved by using those accessors. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/mm: Fix typo in radix encodings printBalbir Singh2016-11-171-1/+1
| | | | | | | Rename "sift" to "shift". Signed-off-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: convert storcenter_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-3/+2Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts storcenter_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert pseries_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-5/+2Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts pseries_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert ppc6xx_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-8/+2Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts ppc6xx_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert ppc64e_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-4/+2Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts ppc64e_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert ppc64_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-6/+3Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts ppc64_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert pmac32_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-9/+6Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts pmac32_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: disable IDE subsystem in pasemi_defconfigBartlomiej Zolnierkiewicz2016-11-141-3/+0Star
| | | | | | | | | This patch disables deprecated IDE subsystem in pasemi_defconfig (no IDE host drivers are selected in this config so there is no valid reason to enable IDE subsystem itself). Cc: Olof Johansson <olof@lixom.net> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert maple_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-5/+4Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts maple_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert g5_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-4/+1Star
| | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts g5_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert chrp32_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-6/+4Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts chrp32_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert cell_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-4/+3Star
| | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts cell_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* powerpc: convert amigaone_defconfig to use libata PATA driversBartlomiej Zolnierkiewicz2016-11-141-6/+4Star
| | | | | | | | | | | | | | | | | | | | IDE subsystem has been deprecated since 2009 and the majority (if not all) of Linux distributions have switched to use libata for ATA support exclusively. However there are still some users (mostly old or/and embedded non-x86 systems) that have not converted from using IDE subsystem to libata PATA drivers. This doesn't seem to be good thing in the long-term for Linux as while there is less and less PATA systems left in use: * testing efforts are divided between two subsystems * having duplicate drivers for same hardware confuses users This patch converts amigaone_defconfig to use libata PATA drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
* selftests/powerpc: Return false instead of -1 in require_paranoia_below()Peter Senna Tschudin2016-11-141-3/+3
| | | | | | | | | | | | | | | | | | Returning a negative value for a boolean function seem to have the undesired effect of returning true. require_paranoia_below() is a boolean function, but the variable used to store the return value is an integer, receiving -1 or 0. This patch converts rc to bool, replaces -1 by false, and 0 by true. mpe: This wasn't exhibiting in practice because the common case, where we do the comparison of the desired level vs the current value, was being compiled into a computation based on the result of the comparison, ie. it wasn't using the default -1 value at all. However that was just luck and the code is still wrong. Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: Andrew Shadura <andrew.shadura@collabora.co.uk> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pci/rpadlpar: Fix device reference leaksJohan Hovold2016-11-141-1/+9
| | | | | | | | | Make sure to drop any device reference taken by vio_find_node() when adding and removing virtual I/O slots. Fixes: 5eeb8c63a38f ("[PATCH] PCI Hotplug: rpaphp: Move VIO registration") Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/vio: Clarify vio_find_node() reference countingJohan Hovold2016-11-141-0/+3
| | | | | | | | Add comment clarifying that vio_find_node() takes a reference to the embedded struct device which needs to be dropped after use. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/ibmebus: Fix further device reference leaksJohan Hovold2016-11-141-2/+6
| | | | | | | | | Make sure to drop any reference taken by bus_find_device() when creating devices during init and driver registration. Fixes: 55347cc9962f ("[POWERPC] ibmebus: Add device creation and bus probing based on of_device") Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/ibmebus: Fix device reference leaks in sysfs interfaceJohan Hovold2016-11-141-2/+6
| | | | | | | | | | Make sure to drop any reference taken by bus_find_device() in the sysfs callbacks that are used to create and destroy devices based on device-tree entries. Fixes: 6bccf755ff53 ("[POWERPC] ibmebus: dynamic addition/removal of adapters, some code cleanup") Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Simplify searching for compatible device nodesJack Miller2016-11-141-17/+7Star
| | | | | | | | | This condenses the opal node searching into a single function that finds all compatible nodes, instead of just searching the ibm,opal children, for ipmi, flash, and prd similar to how opal-i2c nodes are found. Signed-off-by: Jack Miller <jack@codezen.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: Revert Load Monitor Register SupportMichael Neuling2016-11-144-34/+0Star
| | | | | | | | | | | Load monitored is no longer supported on POWER9 so let's remove the code. This reverts commit bd3ea317fddf ("powerpc: Load Monitor Register Support"). Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* selftests/powerpc: Revert Load Monitor Register TestsMichael Neuling2016-11-146-227/+1Star
| | | | | | | | | | | | | | Load monitored won't be supported in POWER9, so PPC_FEATURE2_ARCH_3_00 (in HWCAP2) will no longer imply Load monitor support. These Load monitored tests are enabled by PPC_FEATURE2_ARCH_3_00 so they are now bogus and need to be removed. This reverts commit 16c19a2e9833 ("selftests/powerpc: Load Monitor Register Tests"). Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/configs: Drop REISERFS from pseries & powernvMichael Ellerman2016-11-142-8/+0Star
| | | | | | | | No one uses reiserfs much these days, or is likely to in future. So drop it from pseries and powernv defconfigs to save time and space. It's still enabled in ppc64_defconfig so we get some build coverage. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* macintosh: Remove dependency on IDE_GD_ATA if ADB_PMU_LED_DISK is selectedElimar Riesebieter2016-11-141-1/+0Star
| | | | | | | | We can use the front led of powerbooks/ibooks to visualize disk activity without the deprecated IDE_GD_ATA. Signed-off-by: Elimar Riesebieter <riesebie@lxtec.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/hash64: Be more careful when generating tlbielBalbir Singh2016-11-141-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In ISA v2.05, the tlbiel instruction takes two arguments, RB and L: tlbiel RB,L +---------+---------+----+---------+---------+---------+----+ | 31 | / | L | / | RB | 274 | / | | 31 - 26 | 25 - 22 | 21 | 20 - 16 | 15 - 11 | 10 - 1 | 0 | +---------+---------+----+---------+---------+---------+----+ In ISA v2.06 tlbiel takes only one argument, RB: tlbiel RB +---------+---------+---------+---------+---------+----+ | 31 | / | / | RB | 274 | / | | 31 - 26 | 25 - 21 | 20 - 16 | 15 - 11 | 10 - 1 | 0 | +---------+---------+---------+---------+---------+----+ And in ISA v3.00 tlbiel takes five arguments: tlbiel RB,RS,RIC,PRS,R +---------+---------+----+---------+----+----+---------+---------+----+ | 31 | RS | / | RIC |PRS | R | RB | 274 | / | | 31 - 26 | 25 - 21 | 20 | 19 - 18 | 17 | 16 | 15 - 11 | 10 - 1 | 0 | +---------+---------+----+---------+----+----+---------+---------+----+ However the assembler also accepts "tlbiel RB", and generates "tlbiel RB,r0,0,0,0". As you can see above the L field from the v2.05 encoding overlaps with the reserved field of the v2.06 encoding, and the low bit of the RS field of the v3.00 encoding. Currently in __tlbiel() we generate two tlbiel instructions manually using hex constants. In the first case, for MMU_PAGE_4K, we generate "tlbiel RB,0", which is safe in all cases, because the L bit is zero. However in the default case we generate "tlbiel RB,1", therefore setting bit 21 to 1. This is not an actual bug on v2.06 processors, because the CPU ignores the value of the reserved field. However software is supposed to encode the reserved fields as zero to enable forward compatibility. On v3.00 processors setting bit 21 to 1 and no other bits of RS, means we are using r1 for the value of RS. Although it's not obvious, the code sets the IS field (bits 10-11) to 0 (by omission), and L=1, in the va value, which is passed as RB. We also pass R=0 in the instruction. The combination of IS=0, L=1 and R=0 means the value of RS is not used, so even on ISA v3.00 there is no actual bug. We should still fix it, as setting a reserved bit on v2.06 is naughty, and we are only avoiding a bug on v3.00 by accident rather than design. Use ASM_FTR_IFSET() to generate the single argument form on ISA v2.06 and later, and the two argument form on pre v2.06. Although there may be very old toolchains which don't understand tlbiel, we have other code in the tree which has been using tlbiel for over five years, and no one has reported any build failures, so just let the assembler generate the instructions. Signed-off-by: Balbir Singh <bsingharora@gmail.com> [mpe: Rewrite change log, use IFSET instead of IFCLR] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/book3s64: Always build for power4 or laterMichael Ellerman2016-11-141-0/+1
| | | | | | | | | | | | | | | | When we're not compiling for a specific CPU, ie. none of the CONFIG_POWERx_CPU options are set, and CONFIG_GENERIC_CPU *is* set, we currently don't pass any -mcpu option to the compiler. This means the compiler builds for a "generic" Power CPU. But back in 2014 we dropped support for pre power4 CPUs in commit 468a33028edd ("powerpc: Drop support for pre-POWER4 cpus"). Given that, there's no point in building the kernel to run on pre power4 cpus. So update the flags we pass to the compiler when CONFIG_GENERIC_CPU is set, to specify -mcpu=power4. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/64: Add an option to force run-at-load to test relocationNicholas Piggin2016-11-142-1/+17
| | | | | | | | | This adds a config option that can help exercise the case when the kernel is not running at PAGE_OFFSET. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Use H_CLEAR_HPT to clear MMU hash table during kexecAnton Blanchard2016-11-142-3/+24
| | | | | | | | | | | | | | | An hcall was recently added that does exactly what we need during kexec - it clears the entire MMU hash table, ignoring any VRMA mappings. Try it and fall back to the old method if we get a failure. On a POWER8 box with 5TB of memory, this reduces the time it takes to kexec a new kernel from from 4 minutes to 1 minute. Signed-off-by: Anton Blanchard <anton@samba.org> Tested-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> [mpe: Split into separate functions and tweak function naming] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* i2c_powermac: shut up lockdep warningDenis Kirjanov2016-11-141-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | That's unclear why lockdep shows the following warning but adding a lockdep class to struct pmac_i2c_bus solves it [ 20.507795] ====================================================== [ 20.507796] [ INFO: possible circular locking dependency detected ] [ 20.507800] 4.8.0-rc7-00037-gd2ffb01 #21 Not tainted [ 20.507801] ------------------------------------------------------- [ 20.507803] swapper/0/1 is trying to acquire lock: [ 20.507818] (&bus->mutex){+.+.+.}, at: [<c000000000052830>] .pmac_i2c_open+0x30/0x100 [ 20.507819] [ 20.507819] but task is already holding lock: [ 20.507829] (&policy->rwsem){+.+.+.}, at: [<c00000000068adcc>] .cpufreq_online+0x1ac/0x9d0 [ 20.507830] [ 20.507830] which lock already depends on the new lock. [ 20.507830] [ 20.507832] [ 20.507832] the existing dependency chain (in reverse order) is: [ 20.507837] [ 20.507837] -> #4 (&policy->rwsem){+.+.+.}: [ 20.507844] [<c00000000082385c>] .down_write+0x6c/0x110 [ 20.507849] [<c00000000068adcc>] .cpufreq_online+0x1ac/0x9d0 [ 20.507855] [<c0000000004d76d8>] .subsys_interface_register+0xb8/0x110 [ 20.507860] [<c000000000689bb0>] .cpufreq_register_driver+0x1d0/0x250 [ 20.507866] [<c000000000b4f8f4>] .g5_cpufreq_init+0x9cc/0xa28 [ 20.507872] [<c00000000000a98c>] .do_one_initcall+0x5c/0x1d0 [ 20.507878] [<c000000000b0f86c>] .kernel_init_freeable+0x1ac/0x28c [ 20.507883] [<c00000000000b3bc>] .kernel_init+0x1c/0x140 [ 20.507887] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64 [ 20.507894] [ 20.507894] -> #3 (subsys mutex#2){+.+.+.}: [ 20.507899] [<c000000000820448>] .mutex_lock_nested+0xa8/0x590 [ 20.507903] [<c0000000004d7f24>] .bus_probe_device+0x44/0xe0 [ 20.507907] [<c0000000004d5208>] .device_add+0x508/0x730 [ 20.507911] [<c0000000004dd528>] .register_cpu+0x118/0x190 [ 20.507916] [<c000000000b14450>] .topology_init+0x148/0x248 [ 20.507921] [<c00000000000a98c>] .do_one_initcall+0x5c/0x1d0 [ 20.507925] [<c000000000b0f86c>] .kernel_init_freeable+0x1ac/0x28c [ 20.507929] [<c00000000000b3bc>] .kernel_init+0x1c/0x140 [ 20.507934] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64 [ 20.507939] [ 20.507939] -> #2 (cpu_add_remove_lock){+.+.+.}: [ 20.507944] [<c000000000820448>] .mutex_lock_nested+0xa8/0x590 [ 20.507950] [<c000000000087a9c>] .register_cpu_notifier+0x2c/0x70 [ 20.507955] [<c000000000b267e0>] .spawn_ksoftirqd+0x18/0x4c [ 20.507959] [<c00000000000a98c>] .do_one_initcall+0x5c/0x1d0 [ 20.507964] [<c000000000b0f770>] .kernel_init_freeable+0xb0/0x28c [ 20.507968] [<c00000000000b3bc>] .kernel_init+0x1c/0x140 [ 20.507972] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64 [ 20.507978] [ 20.507978] -> #1 (&host->mutex){+.+.+.}: [ 20.507982] [<c000000000820448>] .mutex_lock_nested+0xa8/0x590 [ 20.507987] [<c0000000000527e8>] .kw_i2c_open+0x18/0x30 [ 20.507991] [<c000000000052894>] .pmac_i2c_open+0x94/0x100 [ 20.507995] [<c000000000b220a0>] .smp_core99_probe+0x260/0x410 [ 20.507999] [<c000000000b185bc>] .smp_prepare_cpus+0x280/0x2ac [ 20.508003] [<c000000000b0f748>] .kernel_init_freeable+0x88/0x28c [ 20.508008] [<c00000000000b3bc>] .kernel_init+0x1c/0x140 [ 20.508012] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64 [ 20.508018] [ 20.508018] -> #0 (&bus->mutex){+.+.+.}: [ 20.508023] [<c0000000000ed5b4>] .lock_acquire+0x84/0x100 [ 20.508027] [<c000000000820448>] .mutex_lock_nested+0xa8/0x590 [ 20.508032] [<c000000000052830>] .pmac_i2c_open+0x30/0x100 [ 20.508037] [<c000000000052e14>] .pmac_i2c_do_begin+0x34/0x120 [ 20.508040] [<c000000000056bc0>] .pmf_call_one+0x50/0xd0 [ 20.508045] [<c00000000068ff1c>] .g5_pfunc_switch_volt+0x2c/0xc0 [ 20.508050] [<c00000000068fecc>] .g5_pfunc_switch_freq+0x1cc/0x1f0 [ 20.508054] [<c00000000068fc2c>] .g5_cpufreq_target+0x2c/0x40 [ 20.508058] [<c0000000006873ec>] .__cpufreq_driver_target+0x23c/0x840 [ 20.508062] [<c00000000068c798>] .cpufreq_gov_performance_limits+0x18/0x30 [ 20.508067] [<c00000000068915c>] .cpufreq_start_governor+0xac/0x100 [ 20.508071] [<c00000000068a788>] .cpufreq_set_policy+0x208/0x260 [ 20.508076] [<c00000000068abdc>] .cpufreq_init_policy+0x6c/0xb0 [ 20.508081] [<c00000000068ae70>] .cpufreq_online+0x250/0x9d0 [ 20.508085] [<c0000000004d76d8>] .subsys_interface_register+0xb8/0x110 [ 20.508090] [<c000000000689bb0>] .cpufreq_register_driver+0x1d0/0x250 [ 20.508094] [<c000000000b4f8f4>] .g5_cpufreq_init+0x9cc/0xa28 [ 20.508099] [<c00000000000a98c>] .do_one_initcall+0x5c/0x1d0 [ 20.508103] [<c000000000b0f86c>] .kernel_init_freeable+0x1ac/0x28c [ 20.508107] [<c00000000000b3bc>] .kernel_init+0x1c/0x140 [ 20.508112] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64 [ 20.508113] [ 20.508113] other info that might help us debug this: [ 20.508113] [ 20.508121] Chain exists of: [ 20.508121] &bus->mutex --> subsys mutex#2 --> &policy->rwsem [ 20.508121] [ 20.508123] Possible unsafe locking scenario: [ 20.508123] [ 20.508124] CPU0 CPU1 [ 20.508125] ---- ---- [ 20.508128] lock(&policy->rwsem); [ 20.508132] lock(subsys mutex#2); [ 20.508135] lock(&policy->rwsem); [ 20.508138] lock(&bus->mutex); [ 20.508139] [ 20.508139] *** DEADLOCK *** [ 20.508139] [ 20.508141] 3 locks held by swapper/0/1: [ 20.508150] #0: (cpu_hotplug.lock){++++++}, at: [<c000000000087838>] .get_online_cpus+0x48/0xc0 [ 20.508159] #1: (subsys mutex#2){+.+.+.}, at: [<c0000000004d7670>] .subsys_interface_register+0x50/0x110 [ 20.508168] #2: (&policy->rwsem){+.+.+.}, at: [<c00000000068adcc>] .cpufreq_online+0x1ac/0x9d0 [ 20.508169] [ 20.508169] stack backtrace: [ 20.508173] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.8.0-rc7-00037-gd2ffb01 #21 [ 20.508175] Call Trace: [ 20.508180] [c0000000790c2b90] [c00000000082cc70] .dump_stack+0xe0/0x14c (unreliable) [ 20.508184] [c0000000790c2c20] [c000000000828c88] .print_circular_bug+0x350/0x388 [ 20.508188] [c0000000790c2cd0] [c0000000000ecb0c] .__lock_acquire+0x196c/0x1d30 [ 20.508192] [c0000000790c2e50] [c0000000000ed5b4] .lock_acquire+0x84/0x100 [ 20.508196] [c0000000790c2f20] [c000000000820448] .mutex_lock_nested+0xa8/0x590 [ 20.508201] [c0000000790c3030] [c000000000052830] .pmac_i2c_open+0x30/0x100 [ 20.508206] [c0000000790c30c0] [c000000000052e14] .pmac_i2c_do_begin+0x34/0x120 [ 20.508209] [c0000000790c3150] [c000000000056bc0] .pmf_call_one+0x50/0xd0 [ 20.508213] [c0000000790c31e0] [c00000000068ff1c] .g5_pfunc_switch_volt+0x2c/0xc0 [ 20.508217] [c0000000790c3250] [c00000000068fecc] .g5_pfunc_switch_freq+0x1cc/0x1f0 [ 20.508221] [c0000000790c3320] [c00000000068fc2c] .g5_cpufreq_target+0x2c/0x40 [ 20.508226] [c0000000790c3390] [c0000000006873ec] .__cpufreq_driver_target+0x23c/0x840 [ 20.508230] [c0000000790c3440] [c00000000068c798] .cpufreq_gov_performance_limits+0x18/0x30 [ 20.508235] [c0000000790c34b0] [c00000000068915c] .cpufreq_start_governor+0xac/0x100 [ 20.508239] [c0000000790c3530] [c00000000068a788] .cpufreq_set_policy+0x208/0x260 [ 20.508244] [c0000000790c35d0] [c00000000068abdc] .cpufreq_init_policy+0x6c/0xb0 [ 20.508249] [c0000000790c3940] [c00000000068ae70] .cpufreq_online+0x250/0x9d0 [ 20.508253] [c0000000790c3a30] [c0000000004d76d8] .subsys_interface_register+0xb8/0x110 [ 20.508258] [c0000000790c3ad0] [c000000000689bb0] .cpufreq_register_driver+0x1d0/0x250 [ 20.508262] [c0000000790c3b60] [c000000000b4f8f4] .g5_cpufreq_init+0x9cc/0xa28 [ 20.508267] [c0000000790c3c20] [c00000000000a98c] .do_one_initcall+0x5c/0x1d0 [ 20.508271] [c0000000790c3d00] [c000000000b0f86c] .kernel_init_freeable+0x1ac/0x28c [ 20.508276] [c0000000790c3db0] [c00000000000b3bc] .kernel_init+0x1c/0x140 [ 20.508280] [c0000000790c3e30] [c0000000000098f4] .ret_from_kernel_thread+0x58/0x64 Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-16 09:04:45 +0200