1. 11 Jul, 2014 9 commits
    • Benjamin Herrenschmidt's avatar
      Merge branch 'merge' into next · 5b972592
      Benjamin Herrenschmidt authored
      5b972592
    • Anton Blanchard's avatar
      powerpc/perf: Never program book3s PMCs with values >= 0x80000000 · f5602941
      Anton Blanchard authored
      
      
      We are seeing a lot of PMU warnings on POWER8:
      
          Can't find PMC that caused IRQ
      
      Looking closer, the active PMC is 0 at this point and we took a PMU
      exception on the transition from negative to 0. Some versions of POWER8
      have an issue where they edge detect and not level detect PMC overflows.
      
      A number of places program the PMC with (0x80000000 - period_left),
      where period_left can be negative. We can either fix all of these or
      just ensure that period_left is always >= 1.
      
      This patch takes the second option.
      
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      f5602941
    • Guenter Roeck's avatar
      powerpc: Disable RELOCATABLE for COMPILE_TEST with PPC64 · fb43e847
      Guenter Roeck authored
      
      
      powerpc:allmodconfig has been failing for some time with the following
      error.
      
      arch/powerpc/kernel/exceptions-64s.S: Assembler messages:
      arch/powerpc/kernel/exceptions-64s.S:1312: Error: attempt to move .org backwards
      make[1]: *** [arch/powerpc/kernel/head_64.o] Error 1
      
      A number of attempts to fix the problem by moving around code have been
      unsuccessful and resulted in failed builds for some configurations and
      the discovery of toolchain bugs.
      
      Fix the problem by disabling RELOCATABLE for COMPILE_TEST builds instead.
      While this is less than perfect, it avoids substantial code changes
      which would otherwise be necessary just to make COMPILE_TEST builds
      happy and might have undesired side effects.
      Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      fb43e847
    • Joel Stanley's avatar
      powerpc/perf: Clear MMCR2 when enabling PMU · b50a6c58
      Joel Stanley authored
      On POWER8 when switching to a KVM guest we set bits in MMCR2 to freeze
      the PMU counters. Aside from on boot they are then never reset,
      resulting in stuck perf counters for any user in the guest or host.
      
      We now set MMCR2 to 0 whenever enabling the PMU, which provides a sane
      state for perf to use the PMU counters under either the guest or the
      host.
      
      This was manifesting as a bug with ppc64_cpu --frequency:
      
          $ sudo ppc64_cpu --frequency
          WARNING: couldn't run on cpu 0
          WARNING: couldn't run on cpu 8
            ...
          WARNING: couldn't run on cpu 144
          WARNING: couldn't run on cpu 152
          min:    18446744073.710 GHz (cpu -1)
          max:    0.000 GHz (cpu -1)
          avg:    0.000 GHz
      
      The command uses a perf counter to measure CPU cycles over a fixed
      amount of time, in order to approximate the frequency of the machine.
      The counters were returning zero once a guest was started, regardless of
      weather it was still running or had been shut down.
      
      By dumping the value of MMCR2, it was observed that once a guest is
      running MMCR2 is set to 1s - which stops counters from running:
      
          $ sudo sh -c 'echo p > /proc/sysrq-trigger'
          CPU: 0 PMU registers, ppmu = POWER8 n_counters = 6
          PMC1:  5b635e38 PMC2: 00000000 PMC3: 00000000 PMC4: 00000000
          PMC5:  1bf5a646 PMC6: 5793d378 PMC7: deadbeef PMC8: deadbeef
          MMCR0: 0000000080000000 MMCR1: 000000001e000000 MMCRA: 0000040000000000
          MMCR2: fffffffffffffc00 EBBHR: 0000000000000000
          EBBRR: 0000000000000000 BESCR: 0000000000000000
          SIAR:  00000000000a51cc SDAR:  c00000000fc40000 SIER:  0000000001000000
      
      This is done unconditionally in book3s_hv_interrupts.S upon entering the
      guest, and the original value is only save/restored if the host has
      indicated it was using the PMU. This is okay, however the user of the
      PMU needs to ensure that it is in a defined state when it starts using
      it.
      
      Fixes: e05b9b9e
      
       ("powerpc/perf: Power8 PMU support")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      b50a6c58
    • Joel Stanley's avatar
      powerpc/perf: Add PPMU_ARCH_207S define · 4d9690dd
      Joel Stanley authored
      
      
      Instead of separate bits for every POWER8 PMU feature, have a single one
      for v2.07 of the architecture.
      
      This saves us adding a MMCR2 define for a future patch.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      4d9690dd
    • Joel Stanley's avatar
      powerpc/kvm: Remove redundant save of SIER AND MMCR2 · f73128f4
      Joel Stanley authored
      These two registers are already saved in the block above. Aside from
      being unnecessary, by the time we get down to the second save location
      r8 no longer contains MMCR2, so we are clobbering the saved value with
      PMC5.
      
      MMCR2 primarily consists of counter freeze bits. So restoring the value
      of PMC5 into MMCR2 will most likely have the effect of freezing
      counters.
      
      Fixes: 72cde5a8
      
       ("KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Acked-by: default avatarPaul Mackerras <paulus@samba.org>
      Reviewed-by: default avatarAlexander Graf <agraf@suse.de>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      f73128f4
    • Preeti U Murthy's avatar
      powerpc/powernv: Check for IRQHAPPENED before sleeping · c733cf83
      Preeti U Murthy authored
      Commit 8d6f7c5a
      
      : "powerpc/powernv: Make it possible to skip the IRQHAPPENED
      check in power7_nap()" added code that prevents cpus from checking for
      pending interrupts just before entering sleep state, which is wrong. These
      interrupts are delivered during the soft irq disabled state of the cpu.
      
      A cpu cannot enter any idle state with pending interrupts because they will
      never be serviced until the next time the cpu is woken up by some other
      interrupt. Its only then that the pending interrupts are replayed. This can result
      in device timeouts or warnings about this cpu being stuck.
      
      This patch fixes ths issue by ensuring that cpus check for pending interrupts
      just before entering any idle state as long as they are not in the path of split
      core operations.
      Signed-off-by: default avatarPreeti U Murthy <preeti@linux.vnet.ibm.com>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      c733cf83
    • Michael Ellerman's avatar
      powerpc: Clean up MMU_FTRS_A2 and MMU_FTR_TYPE_3E · cd68098b
      Michael Ellerman authored
      In fb5a5157
      
       "powerpc: Remove platforms/wsp and associated pieces",
      we removed the last user of MMU_FTRS_A2. So remove it.
      
      MMU_FTRS_A2 was the last user of MMU_FTR_TYPE_3E, so remove it also.
      This leaves some unreachable code in mmu_context_nohash.c, so remove
      that also.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      cd68098b
    • Michael Ellerman's avatar
      powerpc/cell: Fix compilation with CONFIG_COREDUMP=n · e623fbf1
      Michael Ellerman authored
      Commit 046d662f
      
       "coredump: make core dump functionality optional"
      made the coredump optional, but didn't update the spufs code that
      depends on it. That leads to build errors such as:
      
        arch/powerpc/platforms/built-in.o: In function `.spufs_arch_write_note':
        coredump.c:(.text+0x22cd4): undefined reference to `.dump_emit'
        coredump.c:(.text+0x22cf4): undefined reference to `.dump_emit'
        coredump.c:(.text+0x22d0c): undefined reference to `.dump_align'
        coredump.c:(.text+0x22d48): undefined reference to `.dump_emit'
        coredump.c:(.text+0x22e7c): undefined reference to `.dump_skip'
      
      Fix it by adding some ifdefs in the cell code.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      e623fbf1
  2. 02 Jul, 2014 3 commits
    • Laurentiu TUDOR's avatar
      powerpc/85xx: drop hypervisor specific board compatibles · cd115477
      Laurentiu TUDOR authored
      
      
      They're almost a duplicate of the boards array
      and we can build them at run-time.
      Signed-off-by: default avatarLaurentiu Tudor <Laurentiu.Tudor@freescale.com>
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      cd115477
    • Shengzhou Liu's avatar
      powerpc/fsl-booke: Add initial T208x QDS board support · 4c18be2b
      Shengzhou Liu authored
      
      
      Add support for Freescale T2080/T2081 QDS Development System Board.
      
      The T2080QDS Development System is a high-performance computing,
      evaluation, and development platform that supports T2080 QorIQ
      Power Architecture processor, with following major features:
      
      T2080QDS feature overview:
      Processor:
       - T2080 SoC integrating four 64-bit dual-threads e6500 cores up to 1.8GHz
      Memory:
       - Single memory controller capable of supporting DDR3 and DDR3-LP
       - Dual DIMM slots up 2133MT/s with ECC
      Ethernet interfaces:
       - Two 1Gbps RGMII on-board ports
       - Four 10Gbps XFI on-board cages
       - 1Gbps/2.5Gbps SGMII Riser card
       - 10Gbps XAUI Riser card
      Accelerator:
       - DPAA components consist of FMan, BMan, QMan, PME, DCE and SEC
      SerDes:
       - 16 lanes up to 10.3125GHz
       - Supports Aurora debug, PEX, SATA, SGMII, sRIO, HiGig, XFI and XAUI
      IFC:
       - 128MB NOR Flash, 512MB NAND Flash, PromJet debug port and FPGA
      eSPI:
       - Three SPI flash (16MB N25Q128A + 8MB EN25S64 + 512KB SST25WF040)
      USB:
       - Two USB2.0 ports with internal PHY (one Type-A + one micro Type-AB)
      PCIE:
       - Four PCI Express controllers (two PCIe 2.0 and two PCIe 3.0, SR-IOV)
      SATA:
       - Two SATA 2.0 ports on-board
      SRIO:
       - Two Serial RapidIO 2.0 ports up to 5 GHz
      eSDHC:
       - Supports SD/MMC/eMMC Card
      DMA:
       - Three 8-channels DMA controllers
      I2C:
       - Four I2C controllers.
      UART:
       - Dual 4-pins UART serial ports
      System Logic:
       - QIXIS-II FPGA system controll
      
      T2081QDS board shares the same PCB with T1040QDS with some differences.
      Signed-off-by: default avatarShengzhou Liu <Shengzhou.Liu@freescale.com>
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      4c18be2b
    • Shengzhou Liu's avatar
      powerpc/fsl-booke: Add support for T2080/T2081 SoC · 1d8de8fc
      Shengzhou Liu authored
      
      
      The T2080 QorIQ multicore processor combines four dual-threaded e6500 Power
      Architecture processor cores with high-performance datapath acceleration
      logic and network and peripheral bus interfaces required for networking,
      telecom/datacom, wireless infrastructure, and mil/aerospace applications.
      
      The T2080 SoC includes the following function and features:
      - Four dual-threaded 64-bit Power architecture e6500 cores, up to 1.8GHz
      - 2MB L2 cache and 512KB CoreNet platform cache (CPC)
      - Hierarchical interconnect fabric
      - One 32-/64-bit DDR3/3L SDRAM memory controllers with ECC and interleaving
      - Data Path Acceleration Architecture (DPAA) incorporating acceleration
      - 16 SerDes lanes up to 10.3125 GHz
      - 8 Ethernet interfaces (multiple 1G/2.5G/10G MACs)
      - High-speed peripheral interfaces
        - Four PCI Express controllers (two PCIe 2.0 and two PCIe 3.0)
        - Two Serial RapidIO 2.0 controllers/ports running at up to 5 GHz
      - Additional peripheral interfaces
        - Two serial ATA (SATA 2.0) controllers
        - Two high-speed USB 2.0 controllers with integrated PHY
        - Enhanced secure digital host controller (SD/SDXC/eMMC)
        - Enhanced serial peripheral interface (eSPI)
        - Four I2C controllers
        - Four 2-pin UARTs or two 4-pin UARTs
        - Integrated Flash Controller supporting NAND and NOR flash
      - Three eight-channel DMA engines
      - Support for hardware virtualization and partitioning enforcement
      - QorIQ Platform's Trust Architecture 2.0
      
      T2081 is a reduced personality of T2080 with following difference:
      Feature               T2080 T2081
      1G Ethernet numbers:  8     6
      10G Ethernet numbers: 4     2
      SerDes lanes:         16    8
      Serial RapidIO,RMan:  2     no
      SATA Controller:      2     no
      Aurora:               yes   no
      SoC Package:          896-pins 780-pins
      Signed-off-by: default avatarShengzhou Liu <Shengzhou.Liu@freescale.com>
      [scottwood@freescale.com: added fsl,qoriq-pci-v3.0 for U-Boot compat]
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      1d8de8fc
  3. 25 Jun, 2014 8 commits
    • Scott Wood's avatar
      powerpc/8xx: Remove empty asm/mpc8xx.h · 087dfae3
      Scott Wood authored
      
      
      m8xx_pcmcia_ops was the only thing in this file (other than a comment
      that describes a usage that doesn't match the file's contents); now
      that m8xx_pcmcia_ops is gone, remove the empty file.
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Cc: Pantelis Antoniou <pantelis.antoniou@gmail.com>
      Cc: Vitaly Bordug <vitb@kernel.crashing.org>
      Cc: netdev@vger.kernel.org
      087dfae3
    • Scott Wood's avatar
      pcmcia: Remove m8xx_pcmcia driver · 39eb56da
      Scott Wood authored
      This driver doesn't build, and apparently has not built since
      arch/ppc was removed in 2008 (when mk_int_int_mask was removed
      from asm/irq.h, among other build errors).
      
      A few weeks ago I asked whether anyone was actively maintaining
      this code, and got no positive response:
      http://patchwork.ozlabs.org/patch/352082/
      
      
      
      So, let's remove it.
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Cc: Vitaly Bordug <vitb@kernel.crashing.org>
      Cc: linux-pcmcia@lists.infradead.org
      Cc: Paul Bolle <pebolle@tiscali.nl>
      39eb56da
    • Bharat Bhushan's avatar
      booke/powerpc: define wimge shift mask to fix compilation error · 2759a7f1
      Bharat Bhushan authored
      
      
      This fixes below compilation error on SOCs where CONFIG_PHYS_64BIT
      is not defined:
      
       arch/powerpc/kvm/e500_mmu_host.c: In function 'kvmppc_e500_shadow_map':
      | arch/powerpc/kvm/e500_mmu_host.c:631:20: error: 'PTE_WIMGE_SHIFT' undeclared (first use in this function)
      |    wimg = (*ptep >> PTE_WIMGE_SHIFT) & MAS2_WIMGE_MASK;
      |                     ^
      | arch/powerpc/kvm/e500_mmu_host.c:631:20: note: each undeclared identifier is reported only once for each function it appears in
      | make[1]: *** [arch/powerpc/kvm/e500_mmu_host.o] Error 1
      Signed-off-by: default avatarBharat Bhushan <Bharat.Bhushan@freescale.com>
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      2759a7f1
    • Wladislav Wiebe's avatar
      powerpc/traps/e500: fix misleading error output · c1528339
      Wladislav Wiebe authored
      
      
      In machine_check_e500 exception handler is a wrong indication
      in case of MCSR_BUS_WBERR - so print "Write" instead of "Read".
      Signed-off-by: default avatarWladislav Wiebe <wladislav.kw@gmail.com>
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      c1528339
    • Chunhe Lan's avatar
      powerpc/85xx: Add T4240RDB board support · 36a2a09d
      Chunhe Lan authored
      
      
      T4240RDB board Specification
      ----------------------------
      Memory subsystem:
           6GB DDR3
           128MB NOR flash
           2GB NAND flash
      Ethernet:
           Eight 1G SGMII ports
           Four 10Gbps SFP+ ports
      PCIe:
           Two PCIe slots
      USB:
           Two USB2.0 Type A ports
      SDHC:
           One SD-card port
      SATA:
           One SATA port
      UART:
           Dual RJ45 ports
      Signed-off-by: default avatarChunhe Lan <Chunhe.Lan@freescale.com>
      Cc: Scott Wood <scottwood@freescale.com>
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      36a2a09d
    • Scott Wood's avatar
      powerpc: Don't skip ePAPR spin-table CPUs · 6663a4fa
      Scott Wood authored
      Commit 59a53afe
      
       "powerpc: Don't setup
      CPUs with bad status" broke ePAPR SMP booting.  ePAPR says that CPUs
      that aren't presently running shall have status of disabled, with
      enable-method being used to determine whether the CPU can be enabled.
      
      Fix by checking for spin-table, which is currently the only supported
      enable-method.
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Cc: Michael Neuling <mikey@neuling.org>
      Cc: Emil Medve <Emilian.Medve@Freescale.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      6663a4fa
    • Laurent Dufour's avatar
      powerpc/module: Fix TOC symbol CRC · c2cbcf53
      Laurent Dufour authored
      The commit 71ec7c55
      
       introduced the magic symbol ".TOC." for ELFv2 ABI.
      This symbol is built manually and has no CRC value computed. A zero value
      is put in the CRC section to avoid modpost complaining about a missing CRC.
      Unfortunately, this breaks the kernel module loading when the kernel is
      relocated (kdump case for instance) because of the relocation applied to
      the kcrctab values.
      
      This patch compute a CRC value for the TOC symbol which will match the one
      compute by the kernel when it is relocated - aka '0 - relocate_start' done in
      maybe_relocated called by check_version (module.c).
      Signed-off-by: default avatarLaurent Dufour <ldufour@linux.vnet.ibm.com>
      Cc: Anton Blanchard <anton@samba.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      c2cbcf53
    • Michael Ellerman's avatar
      powerpc/powernv: Remove OPAL v1 takeover · e2500be2
      Michael Ellerman authored
      In commit 27f44888 "Add OPAL takeover from PowerVM" we added support
      for "takeover" on OPAL v1 machines.
      
      This was a mode of operation where we would boot under pHyp, and query
      for the presence of OPAL. If detected we would then do a special
      sequence to take over the machine, and the kernel would end up running
      in hypervisor mode.
      
      OPAL v1 was never a supported product, and was never shipped outside
      IBM. As far as we know no one is still using it.
      
      Newer versions of OPAL do not use the takeover mechanism. Although the
      query for OPAL should be harmless on machines with newer OPAL, we have
      seen a machine where it causes a crash in Open Firmware.
      
      The code in early_init_devtree() to copy boot_command_line into cmd_line
      was added in commit 817c21ad
      
       "Get kernel command line accross OPAL
      takeover", and AFAIK is only used by takeover, so should also be
      removed.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      e2500be2
  4. 24 Jun, 2014 13 commits
  5. 20 Jun, 2014 7 commits