[PATCH] powerpc/irq: Run softirqs off the top of the irq stack

Nowadays, irq_exit() calls __do_softirq() pretty much directly instead of calling do_softirq() which switches to the decicated softirq stack. This has lead to observed stack overflows on powerpc since we call irq_enter() and irq_exit() outside of the scope that switches to the irq stack. This fix

[PATCH 2/2][v4] powerpc/configs: Enable T1040QDS by default in corenet

T1040 supports both 32 & 64 bit kernel. so enable T1040QDS by default in the config files. Signed-off-by: Prabhakar Kushwaha --- Based upon git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git Branch next Changes for v2: Sending as it is Changes for v3: Sending as it is Changes fo

[PATCH 1/2][v4] powerpc/fsl-booke: Add initial T104x_QDS board support

Add support for T104x board in board file t104x_qds.c, It is common for both T1040 and T1042 as they share same QDS board. T1040QDS board Overview --- - SERDES Connections, 8 lanes supporting: — PCI Express: supporting Gen 1 and Gen 2; — SGMII — QSGMII

[PATCH][v4] powerpc/mpc85xx:Add initial device tree support of T104x

The QorIQ T1040/T1042 processor support four integrated 64-bit e5500 PA processor cores with high-performance data path acceleration architecture and network peripheral interfaces required for networking & telecommunications. T1042 personality is a reduced personality of T1040 without Integrated 8

[PATCH 5/6 v7] kvm: booke: clear host tlb reference flag on guest tlb invalidation

On booke, "struct tlbe_ref" contains host tlb mapping information (pfn: for guest-pfn to pfn, flags: attribute associated with this mapping) for a guest tlb entry. So when a guest creates a TLB entry then "struct tlbe_ref" is set to point to valid "pfn" and set attributes in "flags" field of the ab

[PATCH] sound/soc/fsl/fsl_ssi.c: let checking none-zero instead of checking NO_IRQ

NO_IRQ may be defined as '(unsigned int) -1' in some architectures (arm, sh ...), and either may not be defined in some architectures which can enable SND_SOC_FSL_SSI (e.g. allmodconfig for arc). When irq_of_parse_and_map() fails, it will always return 0, so need let checking none-zero instead of

[PATCH v2] sound/soc/fsl/fsl_ssi.c: let check zero instead of check NO_IRQ

NO_IRQ may be defined as '(unsigned int) -1' in some architectures (arm, sh ...), and either may not be defined in some architectures which can enable SND_SOC_FSL_SSI (e.g. allmodconfig for arc). When irq_of_parse_and_map() fails, it will always return 0, so need check zero instead of NO_IRQ, or w

Re: [PATCH] sound/soc/fsl/fsl_ssi.c: let checking none-zero instead of checking NO_IRQ

On 09/23/2013 11:24 AM, Chen Gang wrote: > NO_IRQ may be defined as '(unsigned int) -1' in some architectures > (arm, sh ...), and either may not be defined in some architectures > which can enable SND_SOC_FSL_SSI (e.g. allmodconfig for arc). > > When irq_of_parse_and_map() fails, it will always r

[PATCH 39/39] powerpc: Work around little endian gcc bug

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 --- arch/powerpc/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/Makefile b/arch/powerpc/

[PATCH 38/39] powerpc: Don't set HAVE_EFFICIENT_UNALIGNED_ACCESS on little endian builds

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 --- arch/powerpc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/K

[PATCH 37/39] powerpc: Add ability to build little endian kernels

From: Ian 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

[PATCH 36/39] powerpc/kvm/book3s_hv: Add little endian guest support

Add support for the H_SET_MODE hcall so we can select the endianness of our exceptions. We create a guest MSR from scratch when delivering exceptions in a few places and instead of extracing the LPCR[ILE] and inserting it into MSR_LE each time simply create a new variable intr_msr which contains t

[PATCH 35/39] KVM: PPC: Disable KVM on little endian builds

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 Cc: Alexander Graf --- arch/powerpc/kvm/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/k

[PATCH 34/39] tty/hvc_opal: powerpc: Make OPAL HVC device tree accesses endian safe

From: Benjamin Herrenschmidt Signed-off-by: Benjamin Herrenschmidt --- drivers/tty/hvc/hvc_opal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c index cd69b48..6496872 100644 --- a/drivers/tty/hvc/hvc_opal.c +++ b/

[PATCH 33/39] powerpc/hvsi: Fix endian issues in HVSI driver

From: Benjamin Herrenschmidt Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/hvsi.h | 16 drivers/tty/hvc/hvsi_lib.c | 25 - 2 files changed, 20 insertions(+), 21 deletions(-) diff --git a/arch/powerpc/include/asm/hvsi.h b/arch/p

[PATCH 32/39] powerpc/powernv: Fix some PCI sparse errors and one LE bug

pnv_pci_setup_bml_iommu was missing a byteswap of a device tree property. Signed-off-by: Anton Blanchard --- arch/powerpc/include/asm/opal.h | 22 +++--- arch/powerpc/platforms/powernv/opal.c | 2 +- arch/powerpc/platforms/powernv/pci-ioda.c | 6 +++--- arch/power

[PATCH 31/39] powerpc/powernv: More little endian issues in OPAL RTC driver

Sparse caught an issue where opal_set_rtc_time was incorrectly byteswapping. Also fix a number of sparse warnings. Signed-off-by: Anton Blanchard --- arch/powerpc/include/asm/opal.h | 4 ++-- arch/powerpc/platforms/powernv/opal-rtc.c | 19 ++- 2 files changed, 12 inser

[PATCH 29/39] powerpc/powernv: Fix OPAL entry and exit in little endian mode

From: Benjamin Herrenschmidt Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/powernv/opal-wrappers.S | 9 - 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S inde

[PATCH 30/39] powerpc/powernv: Don't register exception handlers in little endian mode

From: Benjamin Herrenschmidt The powernv exception handlers are not ready to take exceptions in little endian mode, so disable them. Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/powernv/opal.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/platforms/powe

[PATCH 28/39] powerpc/powernv: Fix endian issues in OPAL console and udbg backend

From: Benjamin Herrenschmidt Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/opal.h | 8 arch/powerpc/platforms/powernv/opal.c | 28 2 files changed, 20 insertions(+), 16 deletions(-) diff --git a/arch/powerpc/include/asm/opal.h b

[PATCH 27/39] powerpc/powernv: Fix endian issues in powernv PCI code

From: Benjamin Herrenschmidt Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/powernv/pci-ioda.c | 31 +-- arch/powerpc/platforms/powernv/pci.c | 27 +-- 2 files changed, 30 insertions(+), 28 deletions(-) diff --git a/arc

[PATCH 26/39] powerpc/powernv: Make OPAL NVRAM device tree accesses endian safe

From: Benjamin Herrenschmidt Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/powernv/opal-nvram.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/powernv/opal-nvram.c b/arch/powerpc/platforms/powernv/opal-nvram.c index 3f83e1a..ac

[PATCH 25/39] powerpc/powernv: Fix endian issues in OPAL ICS backend

From: Benjamin Herrenschmidt Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/sysdev/xics/ics-opal.c | 17 + 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/sysdev/xics/ics-opal.c b/arch/powerpc/sysdev/xics/ics-opal.c index 39d7221..3c6ee1b 1006

[PATCH 24/39] powerpc/powernv: Fix endian issues in OPAL RTC driver

From: Benjamin Herrenschmidt Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/powernv/opal-rtc.c | 7 +++ 1 file changed, 7 insertions(+) diff --git a/arch/powerpc/platforms/powernv/opal-rtc.c b/arch/powerpc/platforms/powernv/opal-rtc.c index 2aa7641..dbfdba3 100644 --- a/

[PATCH 23/39] powerpc: Little endian sparse clean up for arch/powerpc/platforms/powernv/pci-ioda.c

From: Alistair Popple Signed-off-by: Alistair Popple --- arch/powerpc/platforms/powernv/pci-ioda.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 74a5a57..9a903ed 100644 --- a/a

[PATCH 22/39] powerpc: Little endian fix for arch/powerpc/platforms/powernv/pci-p5ioc2.c

From: Alistair Popple Signed-off-by: Alistair Popple --- arch/powerpc/platforms/powernv/pci-p5ioc2.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-p5ioc2.c b/arch/powerpc/platforms/powernv/pci-p5ioc2.c index b68db63..f8b4bd8 100644 -

[PATCH 21/39] powerpc: Little endian fix for arch/powerpc/platforms/powernv/pci.c

From: Alistair Popple Signed-off-by: Alistair Popple --- arch/powerpc/platforms/powernv/pci.c | 9 + 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c index a28d3b5..9122215 100644 --- a/arch/powerp

[PATCH 20/39] powerpc: Little endian fixes for platforms/powernv/opal.c

From: Alistair Popple Signed-off-by: Alistair Popple --- arch/powerpc/platforms/powernv/opal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 2911abe..4ffa75e 100644 --- a/arch/powerpc/plat

[PATCH 19/39] powerpc: uname should return ppc64le/ppcle on little endian builds

We need to distinguish between big endian and little endian environments, so fix uname to return the right thing. Signed-off-by: Anton Blanchard --- arch/powerpc/Makefile | 13 +++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makef

[PATCH 18/39] powerpc: Use generic memcpy code in little endian

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 --- arch/powerpc/include/asm/string.h | 4 arch/powerpc/kernel/ppc_ksyms.c | 2 ++ arch/powerpc/lib/Makefile | 9 ++---

[PATCH 17/39] powerpc: Use generic checksum code in little endian

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 --- arch/powerpc/Kconfig| 3 +++ arch/powerpc/include/asm/checksum.h | 5 + arch/powerpc/kernel/ppc_ksyms.c |

[PATCH 15/39] powerpc: Add little endian support to alignment handler

Handle most unaligned load and store faults in little endian mode. Strings, multiples and VSX are not supported. Signed-off-by: Anton Blanchard --- arch/powerpc/kernel/align.c | 93 ++--- 1 file changed, 63 insertions(+), 30 deletions(-) diff --git a/arch

[PATCH 16/39] powerpc: Handle VSX alignment faults in little endian mode

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 --- arch/powerpc/kernel/align.c | 41 + 1 file cha

[PATCH 14/39] powerpc: Alignment handler shouldn't access VSX registers with TS_FPR

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: Anton Bla

[PATCH 13/39] powerpc: Remove hard coded FP offsets in alignment handler

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: Anton Blanchard --- arch/powerpc/kernel/align.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-

[PATCH 12/39] powerpc: Remove open coded byte swap macro in alignment handler

Use swab64/32/16 instead of open coding it. Signed-off-by: Anton Blanchard --- arch/powerpc/kernel/align.c | 36 1 file changed, 12 insertions(+), 24 deletions(-) diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c index a27ccd5..af830df 1

[PATCH 11/39] powerpc: endian safe trampoline

From: Benjamin Herrenschmidt 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. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Anton Blanchard --- arch/powerpc/include/asm/pp

[PATCH 10/39] powerpc: Include the appropriate endianness header

From: Ian Munsie This patch will have powerpc include the appropriate generic endianness header depending on what the compiler reports. Signed-off-by: Ian Munsie Signed-off-by: Anton Blanchard --- arch/powerpc/include/uapi/asm/byteorder.h | 4 1 file changed, 4 insertions(+) diff --git

[PATCH 09/39] powerpc: Reset MSR_LE on signal entry

We always take signals in big endian which is wrong. Signals should be taken in native endian. Signed-off-by: Anton Blanchard --- arch/powerpc/kernel/signal_32.c | 3 ++- arch/powerpc/kernel/signal_64.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/s

[PATCH 08/39] powerpc: Set MSR_LE bit on little endian builds

We need to set MSR_LE in kernel and userspace for little endian builds Signed-off-by: Anton Blanchard --- arch/powerpc/include/asm/reg.h | 7 ++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 10d1ef0..126f6e

[PATCH 07/39] powerpc: Add little endian support for word-at-a-time functions

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: Anton Blanchard --- arch/powerpc/include/asm/word-at-a-time.h | 71 +++ 1 file changed, 71 insertions(+) diff --git a/arch/

[PATCH 06/39] powerpc: Support endian agnostic MMIO

From: Ian Munsie 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 - the

[PATCH 05/39] powerpc: Little endian builds double word swap VSX state during context save/restore

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

[PATCH 04/39] powerpc: PTRACE_PEEKUSR/PTRACE_POKEUSER of FPR registers in little endian builds

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: Anton Blanchard --- arch/powerpc/kernel/ptrace.c | 8 1 file

[PATCH 03/39] powerpc: Fix offset of FPRs in VSX registers in little endian builds

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: Anton Bla

[PATCH 02/39] powerpc: Book 3S MMU little endian support

v2: HPTE_LOCK_BIT was wrong in LE, spotted by Paul Mackerras. Signed-off-by: Anton Blanchard --- arch/powerpc/include/asm/mmu-hash64.h | 4 +-- arch/powerpc/mm/hash_native_64.c | 46 --- arch/powerpc/mm/hash_utils_64.c | 38 ++--

[PATCH 01/39] powerpc: Fix endian issues in VMX copy loops

Fix the permute loops for little endian. Signed-off-by: Anton Blanchard --- arch/powerpc/lib/copyuser_power7.S | 54 + arch/powerpc/lib/memcpy_power7.S | 55 ++ 2 files changed, 63 insertions(+), 46 deletions(-) diff --gi

[PATCH 00/39] Second round of 64bit PowerPC little endian patches

This patchset fixes little endian issues found in various places including the alignment handler, PCI, and ptrace code. It also adds little endian support for KVM guests and PowerNV. Alistair Popple (4): powerpc: Little endian fixes for platforms/powernv/opal.c powerpc: Little endian fix for

Re: [PATCH v2 01/10] of/irq: Rework of_irq_count()

On Wed, Sep 18, 2013 at 8:24 AM, Thierry Reding wrote: > The of_irq_to_resource() helper that is used to implement of_irq_count() > tries to resolve interrupts and in fact creates a mapping for resolved > interrupts. That's pretty heavy lifting for something that claims to > just return the number

Re: [PATCH v2 02/10] of/irq: Use irq_of_parse_and_map()

On Wed, Sep 18, 2013 at 8:24 AM, Thierry Reding wrote: > Replace some instances of of_irq_map_one()/irq_create_of_mapping() and > of_irq_to_resource() by the simpler equivalent irq_of_parse_and_map(). > > Signed-off-by: Thierry Reding Acked-by: Rob Herring > --- > arch/arm/mach-u300/timer.c

Re: [PATCH v2 04/10] irqdomain: Return errors from irq_create_of_mapping()

On Wed, Sep 18, 2013 at 8:24 AM, Thierry Reding wrote: > Instead of returning 0 for all errors, allow the precise error code to > be propagated. This will be used in subsequent patches to allow further > propagation of error codes. > > The interrupt number corresponding to the new mapping is retur

Re: [PATCH v2 07/10] of/irq: Propagate errors in of_irq_to_resource_table()

On Wed, Sep 18, 2013 at 8:24 AM, Thierry Reding wrote: > Now that all helpers return precise error codes, this function can > propagate these errors to the caller properly. > > Signed-off-by: Thierry Reding > --- > Changes in v2: > - return 0 on success or a negative error code on failure > - con

Re: [RESEND PATCH 2/2] ppc: bpf_jit: support MOD operation

On Mon, Sep 23, 2013 at 01:13:45AM +1000, Matt Evans wrote: > Hi Vladimir, > > On 21 Sep 2013, at 17:25, Vladimir Murzin wrote: > > > commit b6069a9570 (filter: add MOD operation) added generic > > support for modulus operation in BPF. > > > > This patch brings JIT support for PPC64 > > > > Si

Re: [RESEND PATCH 2/2] ppc: bpf_jit: support MOD operation

Hi Vladimir, On 21 Sep 2013, at 17:25, Vladimir Murzin wrote: > commit b6069a9570 (filter: add MOD operation) added generic > support for modulus operation in BPF. > > This patch brings JIT support for PPC64 > > Signed-off-by: Vladimir Murzin > Acked-by: Matt Evans Not this version, though;

Re: [PATCH 22/51] DMA-API: amba: get rid of separate dma_mask

On Thu, 19 Sep 2013 22:47:01 +0100, Russell King wrote: > AMBA Primecell devices always treat streaming and coherent DMA exactly > the same, so there's no point in having the masks separated. > > Signed-off-by: Russell King for the drivers/of/platform.c portion: Acked-by: Grant Likely g. ___

[PATCH v2 2/2] powerpc/85xx: rename the corenet_ds.c to corenet_generic.c

This file is also used by some RDB and QDS boards. So the name seems not so accurate. Rename it to corenet_generic.c. Also update the function names in this file according to the change. Signed-off-by: Kevin Hao --- A new patch in v2. arch/powerpc/platforms/85xx/Makefile

[PATCH v2 1/2] powerpc/85xx: introduce corenet_generic machine

In the current kernel, the board files for p2041rdb, p3041ds, p4080ds, p5020ds, p5040ds, t4240qds and b4qds are almost the same except the machine name. So this introduces a cornet_generic machine to support all these boards to avoid the code duplication. With these changes the file corenet_ds.h b

[PATCH v2 0/2] powerpc/85xx: introduce corenet_generic machine

v2: - Fold the original patch 2 into patch 1. - Update the patch 1 according to Scott and Kumar's comments. - Introduce a new patch to rename the corenet_ds.c to corenet_generic.c. v1: This patch series introduces a common machine to support p2041rdb, p3041ds, p4080ds, p5020ds, p5040ds, t424