- 11 Oct, 2013 40 commits
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Michael Ellerman authored
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>
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Michael Ellerman authored
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:
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Michael Ellerman authored
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:
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Bharat Bhushan authored
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:
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Vladimir Murzin authored
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:
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Kevin Hao authored
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:
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Bartlomiej Zolnierkiewicz authored
__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:
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Bartlomiej Zolnierkiewicz authored
__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:
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Scott Wood authored
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:
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Anton Blanchard authored
Temporarily work around an ICE we are seeing while building in little endian mode: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57134Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
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Anton Blanchard authored
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:
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Ian Munsie authored
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:
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Anton Blanchard authored
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:
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Benjamin Herrenschmidt authored
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Benjamin Herrenschmidt authored
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Anton Blanchard authored
pnv_pci_setup_bml_iommu was missing a byteswap of a device tree property. Signed-off-by:
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Anton Blanchard authored
Sparse caught an issue where opal_set_rtc_time was incorrectly byteswapping. Also fix a number of sparse warnings. Signed-off-by:
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Benjamin Herrenschmidt authored
The powernv exception handlers are not ready to take exceptions in little endian mode, so disable them. Signed-off-by: -
Benjamin Herrenschmidt authored
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Benjamin Herrenschmidt authored
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Benjamin Herrenschmidt authored
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Benjamin Herrenschmidt authored
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Benjamin Herrenschmidt authored
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Benjamin Herrenschmidt authored
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Alistair Popple authored
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Alistair Popple <alistair@popple.id.au> Signed-off-by:
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Alistair Popple authored
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Alistair Popple authored
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Alistair Popple authored
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Anton Blanchard authored
We need to distinguish between big endian and little endian environments, so fix uname to return the right thing. Signed-off-by:
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Anton Blanchard authored
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:
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Anton Blanchard authored
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:
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Anton Blanchard authored
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:
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Anton Blanchard authored
Handle most unaligned load and store faults in little endian mode. Strings, multiples and VSX are not supported. Signed-off-by:
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Anton Blanchard authored
The TS_FPR macro selects the FPR component of a VSX register (the high doubleword). emulate_vsx is using this macro to get the address of the associated VSX register. This happens to work on big endian, but fails on little endian. Replace it with an explicit array access. Signed-off-by:
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Anton Blanchard authored
The alignment handler assumes big endian ordering when selecting the low word of a 64bit floating point value. Use the existing union which works in both little and big endian. Signed-off-by:
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Anton Blanchard authored
Use swab64/32/16 instead of open coding it. Signed-off-by:
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Benjamin Herrenschmidt authored
Create a trampoline that works in either endian and flips to the expected endian. Use it for primary and secondary thread entry as well as RTAS and OF call return. Credit for finding the magic instruction goes to Paul Mackerras Signed-off-by:
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Ian Munsie authored
This patch will have powerpc include the appropriate generic endianness header depending on what the compiler reports. Signed-off-by:
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Anton Blanchard authored
We always take signals in big endian which is wrong. Signals should be taken in native endian. Signed-off-by:
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Anton Blanchard authored
We need to set MSR_LE in kernel and userspace for little endian builds Signed-off-by:
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