- 11 Oct, 2013 36 commits
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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:
Anton Blanchard <anton@samba.org> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
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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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Anton Blanchard authored
The powerpc word-at-a-time functions are big endian specific. Bring in the x86 version in order to support little endian builds. Signed-off-by:
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Ian Munsie authored
This patch maps the MMIO functions for 32bit PowerPC to their appropriate instructions depending on CPU endianness. The macros used to create the corresponding inline functions are also renamed by this patch. Previously they had BE or LE in their names which was misleading - they had nothing to do with endianness, but actually created different instruction forms so their new names reflect the instruction form they are creating (D-Form and X-Form). Little endian 64bit PowerPC is not supported, so the lack of mappings (and corresponding breakage) for that case is intentional to bring the attention of anyone doing a 64bit little endian port. 64bit big endian is unaffected. [ Added 64 bit versions - Anton ] Signed-off-by:
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Anton Blanchard authored
The elements within VSX loads and stores are big endian ordered regardless of endianness. Our VSX context save/restore code uses lxvd2x and stxvd2x which is a 2x doubleword operation. This means the two doublewords will be swapped and we have to perform another swap to undo it. We need to do this on save and restore. Signed-off-by:
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Anton Blanchard authored
FPRs overlap the high 64bits of the first 32 VSX registers. The ptrace FP read/write code assumes big endian ordering and grabs the lowest 64 bits. Fix this by using the TS_FPR macro which does the right thing. Signed-off-by:
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Anton Blanchard authored
The FPRs overlap the high doublewords of the first 32 VSX registers. Fix TS_FPROFFSET and TS_VSRLOWOFFSET so we access the correct fields in little endian mode. If VSX is disabled the FPRs are only one doubleword in length so TS_FPROFFSET needs adjusting in little endian. Signed-off-by:
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Anton Blanchard authored
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Anton Blanchard authored
Fix the permute loops for little endian. Signed-off-by:
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- 07 Oct, 2013 4 commits
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Benjamin Herrenschmidt authored
irq_exit() is now called on the irq stack, which can trigger a switch to the softirq stack from the irq stack. If an interrupt happens at that point, we will not properly detect the re-entrancy and clobber the original return context on the irq stack. This fixes it. The side effect is to prevent all nesting from softirq stack to irq stack even in the "safe" case but it's simpler that way and matches what x86_64 does. Reported-by:
Cédric Le Goater <clg@fr.ibm.com> Tested-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hidLinus Torvalds authored
Pull HID fixes from Jiri Kosina: - fix for hidraw reference counting regression, by Manoj Chourasia - fix for minor number allocation for uhid, by David Herrmann - other small unsorted fixes / device ID additions * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: wiimote: fix FF deadlock HID: add Holtek USB ID 04d9:a081 SHARKOON DarkGlider HID: hidraw: close underlying device at removal of last reader HID: roccat: Fix "cannot create duplicate filename" problems HID: uhid: allocate static minor
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git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds authored
Pull Tile bugfixes from Chris Metcalf: "This fixes some serious issues with PREEMPT support, and a couple of smaller corner-case issues fixed in the last couple of weeks" * 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: arch: tile: re-use kbasename() helper tile: use a more conservative __my_cpu_offset in CONFIG_PREEMPT tile: ensure interrupts disabled for preempt_schedule_irq() tile: change lock initalization in hardwall tile: include: asm: use 'long long' instead of 'u64' for atomic64_t and its related functions
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David Herrmann authored
The input core has an internal spinlock that is acquired during event injection via input_event() and friends but also held during FF callbacks. That means, there is no way to share a lock between event-injection and FF handling. Unfortunately, this is what is required for wiimote state tracking and what we do with state.lock and input->lock. This deadlock can be triggered when using continuous data reporting and FF on a wiimote device at the same time. I takes me at least 30m of stress-testing to trigger it but users reported considerably shorter times (http://bpaste.net/show/132504/) when using some gaming-console emulators. The real problem is that we have two copies of internal state, one in the wiimote objects and the other in the input device. As the input-lock is not supposed to be accessed from outside of input-core, we have no other chance than offloading FF handling into a worker. This actually works pretty nice and also allows to implictly merge fast rumble changes into a single request. Due to the 3-layered workers (rumble+queue+l2cap) this might reduce FF responsiveness. Initial tests were fine so lets fix the race first and if it turns out to be too slow we can always handle FF out-of-band and skip the queue-worker. Cc: <stable@vger.kernel.org> # 3.11+ Reported-by: Thomas Schneider Signed-off-by:
David Herrmann <dh.herrmann@gmail.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz>
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