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2013-10-11powerpc/powernv: Double size of log blobGavin Shan
Each PHB instance (struct pnv_phb) has its corresponding log blob, which is used to hold the retrieved error log from firmware. The current size of that (4096) isn't enough for PHB3 case and the patch makes that double to 8192. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/eeh: Output error numberGavin Shan
The patch prints the error number while failing to retrieve error log from firmware. It's helpful for debugging. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Support inbound error injectionGavin Shan
For now, we only support outbound error injection. Actually, the hardware supports injecting inbound errors as well. The patch enables to inject inbound errors. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Enable EEH for PHB3Gavin Shan
The EEH isn't enabled for PHB3 and the patch intends to enable it. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/scom: Use "devspec" rather than "path" in debugfs entriesBenjamin Herrenschmidt
This is the traditional name for device-tree path, used in sysfs, do the same for the XSCOM debugfs files. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/scom: CONFIG_SCOM_DEBUGFS should depend on CONFIG_DEBUG_FSBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Add scom support under OPALv3Benjamin Herrenschmidt
OPAL v3 provides interfaces to access the chips XSCOM, expose this via the existing scom infrastructure. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/scom: Create debugfs files using ibm,chip-id if availableBenjamin Herrenschmidt
When creating the debugfs scom files, use "ibm,chip-id" as the scom%d index rather than a simple made up number when possible. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/scom: Add support for "reg" propertyBenjamin Herrenschmidt
When devices are direct children of a scom controller node, they should be able to use the normal "reg" property instead of "scom-reg". In that case, they also use #address-cells rather than #scom-cells to indicate the size of an entry. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/scom: Change scom_read() and scom_write() to return errorsBenjamin Herrenschmidt
scom_read() now returns the read value via a pointer argument and both functions return an int error code Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Enable /dev/port when isa_io_special is setBenjamin Herrenschmidt
isa_io_special is set when the platform provides a "special" implementation of inX/outX via some FW interface for example. Such a platform doesn't need an ISA bridge on PCI, and so /dev/port should be made available even if one isn't present. This makes the LPC bus IOs accessible via /dev/port on PowerNV Power8 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Make ftrace endian-safe.Eugene Surovegin
Signed-off-by: Eugene Surovegin <surovegin@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Make kernel module helper endian-safe.Eugene Surovegin
Signed-off-by: Eugene Surovegin <surovegin@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: prom_init exception when updating core valueLaurent Dufour
Since the CPU is generating an exception when accessing unaligned word, and as this exception is not yet handled when running prom_init, data should be copied from the architecture vector byte per byte. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/booke64: Check napping in performance monitor interruptKevin Hao
The performance monitor interrupt is asynchronous, so we should check if the current processor is in napping status in the handler of this interrupt. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/kernel: Fix endian issue in rtas_pciCedric Le Goater
Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/pseries: Implement arch_get_random_long() based on H_RANDOMMichael Ellerman
Add support for the arch_get_random_long() hook based on the H_RANDOM hypervisor call. We trust the hypervisor to provide us with random data, ie. we don't whiten it in anyway. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11hwrng: Add a driver for the hwrng found in power7+ systemsMichael Ellerman
Add a driver for the hwrng found in power7+ systems, based on the existing code for the arch_get_random_long() hook. We only register a single instance of the driver, not one per device, because we use the existing per_cpu array of devices in the arch code. This means we always read from the "closest" device, avoiding inter-chip memory traffic. Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Implement arch_get_random_long/int() for powernvMichael Ellerman
Add the plumbing to implement arch_get_random_long/int(). It didn't seem worth adding an extra ppc_md hook for int, so we reuse the one for long. Add an implementation for powernv based on the hwrng found in power7+ systems. We whiten the output of the hwrng, and the result passes all the dieharder tests. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11hwrng: Return errors to upper levels in pseries-rng.cMichael Ellerman
We don't expect to get errors from the hypervisor when reading the rng, but if we do we should pass the error up to the hwrng driver. Otherwise the hwrng driver will continue calling us forever. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Added __cmpdi2 for signed 64bit comparisionBharat Bhushan
This was missing on powerpc and I am getting compilation error drivers/vfio/pci/vfio_pci_rdwr.c:193: undefined reference to `__cmpdi2' drivers/vfio/pci/vfio_pci_rdwr.c:193: undefined reference to `__cmpdi2' Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Fix section mismatch warning in free_lppacasVladimir Murzin
While cross-building for PPC64 I've got bunch of WARNING: arch/powerpc/kernel/built-in.o(.text.unlikely+0x2d2): Section mismatch in reference from the function .free_lppacas() to the variable .init.data:lppaca_size The function .free_lppacas() references the variable __initdata lppaca_size. This is often because .free_lppacas lacks a __initdata annotation or the annotation of lppaca_size is wrong. Fix it by using proper annotation for free_lppacas. Additionally, annotate {allocate,new}_llpcas properly. Signed-off-by: Vladimir Murzin <murzin.v@gmail.com> Acked-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/ppc64: Remove the unneeded load of ti_flags in resume_kernelKevin Hao
We already got the value of current_thread_info and ti_flags and store them into r9 and r4 respectively before jumping to resume_kernel. So there is no reason to reload them again. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/8xx/tqm8xx: Fix incorrect placement of __initdata tagBartlomiej Zolnierkiewicz
__initdata tag should be placed between the variable name and equal sign for the variable to be placed in the intended .init.data section. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/legacy_serial: Fix incorrect placement of __initdata tagBartlomiej Zolnierkiewicz
__initdata tag should be placed between the variable name and equal sign for the variable to be placed in the intended .init.data section. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/mpic: Disable preemption when calling mpic_processor_id()Scott Wood
Otherwise, we get a debug traceback due to the use of smp_processor_id() (or get_paca()) inside hard_smp_processor_id(). mpic_host_map() is just looking for a default CPU, so it doesn't matter if we migrate after getting the CPU ID. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Work around little endian gcc bugAnton Blanchard
Temporarily work around an ICE we are seeing while building in little endian mode: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57134 Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Don't set HAVE_EFFICIENT_UNALIGNED_ACCESS on little endian buildsAnton Blanchard
POWER7 takes alignment exceptions on some unaligned addresses, so disable HAVE_EFFICIENT_UNALIGNED_ACCESS. This fixes an early boot issue in the printk code. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Add ability to build little endian kernelsIan Munsie
This patch allows the kbuild system to successfully compile a kernel for the little endian PowerPC64 architecture. A subsequent patch will add the CONFIG_CPU_LITTLE_ENDIAN kernel config option which must be set to build such a kernel. If cross compiling, CROSS_COMPILE must point to a suitable toolchain (compiled for the powerpc64le-linux and powerpcle-linux targets). Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11KVM: PPC: Disable KVM on little endian buildsAnton Blanchard
There are a number of KVM issues with little endian builds. We are working on fixing them, but in the meantime disable it. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11tty/hvc_opal: powerpc: Make OPAL HVC device tree accesses endian safeBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/hvsi: Fix endian issues in HVSI driverBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Fix some PCI sparse errors and one LE bugAnton Blanchard
pnv_pci_setup_bml_iommu was missing a byteswap of a device tree property. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: More little endian issues in OPAL RTC driverAnton Blanchard
Sparse caught an issue where opal_set_rtc_time was incorrectly byteswapping. Also fix a number of sparse warnings. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Don't register exception handlers in little endian modeBenjamin Herrenschmidt
The powernv exception handlers are not ready to take exceptions in little endian mode, so disable them. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Fix OPAL entry and exit in little endian modeBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Fix endian issues in OPAL console and udbg backendBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Fix endian issues in powernv PCI codeBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Make OPAL NVRAM device tree accesses endian safeBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Fix endian issues in OPAL ICS backendBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Fix endian issues in OPAL RTC driverBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Little endian sparse clean up for ↵Alistair Popple
arch/powerpc/platforms/powernv/pci-ioda.c Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Little endian fix for arch/powerpc/platforms/powernv/pci-p5ioc2.cAlistair Popple
Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Little endian fix for arch/powerpc/platforms/powernv/pci.cAlistair Popple
Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Little endian fixes for platforms/powernv/opal.cAlistair Popple
Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: uname should return ppc64le/ppcle on little endian buildsAnton Blanchard
We need to distinguish between big endian and little endian environments, so fix uname to return the right thing. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Use generic memcpy code in little endianAnton Blanchard
We need to fix some endian issues in our memcpy code. For now just enable the generic memcpy routine for little endian builds. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Use generic checksum code in little endianAnton Blanchard
We need to fix some endian issues in our checksum code. For now just enable the generic checksum routines for little endian builds. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Handle VSX alignment faults in little endian modeAnton Blanchard
Things are complicated by the fact that VSX elements are big endian ordered even in little endian mode. 8 byte loads and stores also write to the top 8 bytes of the register. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc: Add little endian support to alignment handlerAnton Blanchard
Handle most unaligned load and store faults in little endian mode. Strings, multiples and VSX are not supported. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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