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2013-10-11powerpc/powernv: Double size of log blobGavin Shan1-1/+1
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/eeh: Output error numberGavin Shan1-2/+2
The patch prints the error number while failing to retrieve error log from firmware. It's helpful for debugging. Signed-off-by: Gavin Shan <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Support inbound error injectionGavin Shan1-9/+50
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Enable EEH for PHB3Gavin Shan2-19/+12
The EEH isn't enabled for PHB3 and the patch intends to enable it. Signed-off-by: Gavin Shan <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/scom: Use "devspec" rather than "path" in debugfs entriesBenjamin Herrenschmidt1-1/+1
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 <[email protected]>
2013-10-11powerpc/scom: CONFIG_SCOM_DEBUGFS should depend on CONFIG_DEBUG_FSBenjamin Herrenschmidt1-1/+1
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Add scom support under OPALv3Benjamin Herrenschmidt3-0/+107
OPAL v3 provides interfaces to access the chips XSCOM, expose this via the existing scom infrastructure. Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/scom: Create debugfs files using ibm,chip-id if availableBenjamin Herrenschmidt1-2/+7
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 <[email protected]>
2013-10-11powerpc/scom: Add support for "reg" propertyBenjamin Herrenschmidt1-5/+17
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 <[email protected]>
2013-10-11powerpc/scom: Change scom_read() and scom_write() to return errorsBenjamin Herrenschmidt5-23/+46
scom_read() now returns the read value via a pointer argument and both functions return an int error code Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Enable /dev/port when isa_io_special is setBenjamin Herrenschmidt1-1/+1
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 <[email protected]>
2013-10-11powerpc: Make ftrace endian-safe.Eugene Surovegin1-0/+4
Signed-off-by: Eugene Surovegin <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Make kernel module helper endian-safe.Eugene Surovegin1-0/+16
Signed-off-by: Eugene Surovegin <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: prom_init exception when updating core valueLaurent Dufour1-6/+22
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/booke64: Check napping in performance monitor interruptKevin Hao1-0/+1
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/kernel: Fix endian issue in rtas_pciCedric Le Goater1-3/+3
Signed-off-by: Cédric Le Goater <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/pseries: Implement arch_get_random_long() based on H_RANDOMMichael Ellerman2-1/+45
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11hwrng: Add a driver for the hwrng found in power7+ systemsMichael Ellerman3-0/+95
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 <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Implement arch_get_random_long/int() for powernvMichael Ellerman6-1/+163
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11hwrng: Return errors to upper levels in pseries-rng.cMichael Ellerman1-3/+11
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Added __cmpdi2 for signed 64bit comparisionBharat Bhushan2-0/+16
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Fix section mismatch warning in free_lppacasVladimir Murzin1-3/+3
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 <[email protected]> Acked-by: Michael Ellerman <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/ppc64: Remove the unneeded load of ti_flags in resume_kernelKevin Hao1-3/+1
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/8xx/tqm8xx: Fix incorrect placement of __initdata tagBartlomiej Zolnierkiewicz1-2/+2
__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 <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/legacy_serial: Fix incorrect placement of __initdata tagBartlomiej Zolnierkiewicz1-1/+1
__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 <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/mpic: Disable preemption when calling mpic_processor_id()Scott Wood1-1/+7
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Work around little endian gcc bugAnton Blanchard1-1/+1
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Don't set HAVE_EFFICIENT_UNALIGNED_ACCESS on little endian buildsAnton Blanchard1-1/+1
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Add ability to build little endian kernelsIan Munsie4-4/+31
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 <[email protected]> Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11KVM: PPC: Disable KVM on little endian buildsAnton Blanchard1-0/+1
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 <[email protected]> Cc: Alexander Graf <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11tty/hvc_opal: powerpc: Make OPAL HVC device tree accesses endian safeBenjamin Herrenschmidt1-2/+2
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/hvsi: Fix endian issues in HVSI driverBenjamin Herrenschmidt2-21/+20
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Fix some PCI sparse errors and one LE bugAnton Blanchard5-19/+19
pnv_pci_setup_bml_iommu was missing a byteswap of a device tree property. Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: More little endian issues in OPAL RTC driverAnton Blanchard2-11/+12
Sparse caught an issue where opal_set_rtc_time was incorrectly byteswapping. Also fix a number of sparse warnings. Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Don't register exception handlers in little endian modeBenjamin Herrenschmidt1-0/+2
The powernv exception handlers are not ready to take exceptions in little endian mode, so disable them. Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Fix OPAL entry and exit in little endian modeBenjamin Herrenschmidt1-1/+8
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Fix endian issues in OPAL console and udbg backendBenjamin Herrenschmidt2-16/+20
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Fix endian issues in powernv PCI codeBenjamin Herrenschmidt2-28/+30
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Make OPAL NVRAM device tree accesses endian safeBenjamin Herrenschmidt1-2/+2
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Fix endian issues in OPAL ICS backendBenjamin Herrenschmidt1-8/+9
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc/powernv: Fix endian issues in OPAL RTC driverBenjamin Herrenschmidt1-0/+7
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Little endian sparse clean up for ↵Alistair Popple1-2/+2
arch/powerpc/platforms/powernv/pci-ioda.c Signed-off-by: Alistair Popple <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Little endian fix for arch/powerpc/platforms/powernv/pci-p5ioc2.cAlistair Popple1-2/+2
Signed-off-by: Alistair Popple <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Little endian fix for arch/powerpc/platforms/powernv/pci.cAlistair Popple1-4/+5
Signed-off-by: Alistair Popple <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Little endian fixes for platforms/powernv/opal.cAlistair Popple1-1/+1
Signed-off-by: Alistair Popple <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: uname should return ppc64le/ppcle on little endian buildsAnton Blanchard1-2/+11
We need to distinguish between big endian and little endian environments, so fix uname to return the right thing. Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Use generic memcpy code in little endianAnton Blanchard3-3/+12
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Use generic checksum code in little endianAnton Blanchard4-2/+17
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Handle VSX alignment faults in little endian modeAnton Blanchard1-8/+33
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 <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-10-11powerpc: Add little endian support to alignment handlerAnton Blanchard1-30/+63
Handle most unaligned load and store faults in little endian mode. Strings, multiples and VSX are not supported. Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
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