Pull ARM64 fixes from Catalin Marinas:
- Remove preempt_count modifications in the arm64 IRQ handling code
since that's already dealt with in generic irq_enter/irq_exit
- PTE_PROT_NONE bit moved higher up to avoid overlapping with the
hardware bits (for PROT_NONE mappings which are pte_present)
- Big-endian fixes for ptrace support
- Asynchronous aborts unmasking while in the kernel
- pgprot_writecombine() change to create Normal NonCacheable memory
rather than Device GRE
* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
arm64: Move PTE_PROT_NONE higher up
arm64: Use Normal NonCacheable memory for writecombine
arm64: debug: make aarch32 bkpt checking endian clean
arm64: ptrace: fix compat registes get/set to be endian clean
arm64: Unmask asynchronous aborts when in kernel mode
arm64: dts: Reserve the memory used for secondary CPU release address
arm64: let the core code deal with preempt_count
Pull s390 updates from Martin Schwidefsky:
"One performance improvement and a few bug fixes. Two of the fixes
deal with the clock related problems we have seen on recent kernels"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/mm: handle asce-type exceptions as normal page fault
s390,time: revert direct ktime path for s390 clockevent device
s390/time,vdso: convert to the new update_vsyscall interface
s390/uaccess: add missing page table walk range check
s390/mm: optimize copy_page
s390/dasd: validate request size before building CCW/TCW request
s390/signal: always restore saved runtime instrumentation psw bit
PTE_PROT_NONE means that a pte is present but does not have any
read/write attributes. However, setting the memory type like
pgprot_writecombine() is allowed and such bits overlap with
PTE_PROT_NONE. This causes mmap/munmap issues in drivers that change the
vma->vm_pg_prot on PROT_NONE mappings.
This patch reverts the PTE_FILE/PTE_PROT_NONE shift in commit
59911ca432 (ARM64: mm: Move PTE_PROT_NONE bit) and moves PTE_PROT_NONE
together with the other software bits.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Steve Capper <steve.capper@linaro.org>
Cc: <stable@vger.kernel.org> # 3.11+
This provides better performance compared to Device GRE and also allows
unaligned accesses. Such memory is intended to be used with standard RAM
(e.g. framebuffers) and not I/O.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
The current breakpoint instruction checking code for A32 is not endian
clean. Fix this with appropriate byte-swapping when retrieving
instructions.
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
On a BE system the wrong half of the X registers is retrieved/written
when attempting to get/set the value of aarch32 registers through
ptrace.
Ensure that types are the correct width so that the relevant
casting occurs.
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Pull powerpc fixes from Ben Herrenschmidt:
"The main thing that caused problem was that CONFIG_CPU_LITTLE_ENDIAN
got turned on with allyesconfig and such, which is not a very good
idea especially since it requires a newer toolchain than what most
people have.
So we turned it into a choice instead that defaults to big endian"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/windfarm: Fix XServe G5 fan control Makefile issue
arch/powerpc/kernel: Use %12.12s instead of %12s to avoid memory overflow
powerpc/signals: Improved mark VSX not saved with small contexts fix
powerpc/kdump: Adding symbols in vmcoreinfo to facilitate dump filtering
powerpc: allyesconfig should not select CONFIG_CPU_LITTLE_ENDIAN
powerpc: Fix error when cross building TAGS & cscope
powerpc/booke: Only check for hugetlb in flush if vma != NULL
powerpc/85xx: typo in dts: "interupt" (four devices)
powerpc/8xx: mfspr SPRN_TBRx in lieu of mftb/mftbu is not supported
powerpc/corenet64: compile with CONFIG_E{5,6}500_CPU well
Pull ARM SoC fixes from Olof Johansson:
"Mostly bugfixes and a few small code removals. Worth pointing out is:
- A handful of more fixes to get DT enablement working properly on
OMAP, finding new breakage of things that don't work quite right
yet without the traditional board files. I expect a bit more of
this to come in this release as people test on their hardware.
- Implementation of power_down_finish() on vexpress, to make kexec
work and to stop the MCPM core to produce a warning (the warning
was new to 3.13-rc1).
- A handful of minor fixes for various platforms"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: bcm2835: add missing #xxx-cells to I2C nodes
ARM: dts: Add max77686 RTC interrupt to cros5250-common
ARM: vexpress/TC2: Implement MCPM power_down_finish()
ARM: tegra: Provide dummy powergate implementation
ARM: omap: fix warning with LPAE build
ARM: OMAP2+: Remove legacy omap4_twl6030_hsmmc_init
ARM: OMAP2+: Remove legacy mux code for display.c
ARM: OMAP2+: Fix undefined reference to set_cntfreq
gpio: twl4030: Fix passing of pdata in the device tree case
gpio: twl4030: Fix regression for twl gpio output
ARM: OMAP2+: More randconfig fixes for reconfigure_io_chain
ARM: dts: imx6qdl: disable spdif "rxtx5" clock option
ARM: dts: Fix omap2 specific dtsi files by adding the missing entries
ARM: OMAP2+: Fix GPMC and simplify bootloader timings for 8250 and smc91x
i2c: omap: Fix missing device tree flags for omap2
The I2C controller node needs #address-cells and #size-cells properties,
but these are currently missing. Add them. This allows child nodes to be
parsed correctly.
Cc: stable@vger.kernel.org
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
The imx fixes for 3.13, part 2:
- Disable S/PDIF "rxtx5" clock option to fix the clocksource breakage
introduced by S/PDIF driver
* tag 'imx-fixes-3.13-2' of git://git.linaro.org/people/shawnguo/linux-2.6:
ARM: dts: imx6qdl: disable spdif "rxtx5" clock option
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
This patch implements the power_down_finish() method for TC2, to
enable the kernel to confirm when CPUs are safely powered down.
The information required for determining when a CPU is parked
cannot be obtained from any single place, so a few sources of
information must be combined:
* mcpm_cpu_power_down() must be pending for the CPU, so that we
don't get confused by false STANDBYWFI positives arising from
CPUidle. This is detected by waiting for the tc2_pm use count
for the target CPU to reach 0.
* Either the SPC must report that the CPU has asserted
STANDBYWFI, or the TC2 tile's reset control logic must be
holding the CPU in reset.
Just checking for STANDBYWFI is not sufficient, because this
signal is not latched when the the cluster is clamped off and
powered down: the relevant status bits just drop to zero. This
means that STANDBYWFI status cannot be used for reliable
detection of the last CPU in a cluster reaching WFI.
This patch is required in order for kexec to work with MCPM on TC2.
MCPM code was changed in commit 0de0d64675 ('ARM: 7848/1: mcpm:
Implement cpu_kill() to synchronise on powerdown'), and since then it
will hit a WARN_ON_ONCE() due to power_down_finish not being implemented
on the TC2 platform.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
From Tony Lindgren:
Few more fixes for issues found booting older omaps using device tree.
Also few randconfig build fixes and removal of some dead code for omap4
as it no longer has legacy platform data based booting support.
* tag 'omap-for-v3.13/more-fixes-for-merge-window-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Remove legacy omap4_twl6030_hsmmc_init
ARM: OMAP2+: Remove legacy mux code for display.c
ARM: OMAP2+: Fix undefined reference to set_cntfreq
gpio: twl4030: Fix passing of pdata in the device tree case
gpio: twl4030: Fix regression for twl gpio output
ARM: OMAP2+: More randconfig fixes for reconfigure_io_chain
ARM: dts: Fix omap2 specific dtsi files by adding the missing entries
ARM: OMAP2+: Fix GPMC and simplify bootloader timings for 8250 and smc91x
i2c: omap: Fix missing device tree flags for omap2
Some omap3 code is throwing a warning:
arch/arm/mach-omap2/pm34xx.c: In function 'omap3_save_secure_ram_context':
arch/arm/mach-omap2/pm34xx.c:123:32: warning: cast to pointer from
integer of different size [-Wint-to-pointer-cast]
In reality this code will never actually execute with LPAE=y, since
Cortex-A8 doesn't support it. So downcasting the __pa() is safe in
this case.
Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Tony Lindgren <tony@atomide.com>
The asynchronous aborts are generally fatal for the kernel but they can
be masked via the pstate A bit. If a system error happens while in
kernel mode, it won't be visible until returning to user space. This
patch enables this kind of abort early to help identifying the cause.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
With the spin-table SMP booting method, secondary CPUs poll a location
passed in the DT. The foundation-v8.dts file doesn't have this memory
reserved and there is a risk of Linux using it before secondary CPUs are
started.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Commit f27dde8dee (sched: Add NEED_RESCHED to the preempt_count)
introduced the use of bit 31 in preempt_count for obscure scheduling
purposes.
This causes interrupts taken from EL0 to hit the (open coded) BUG when
this flag is flipped while handling the interrupt (we compare the
values before and after, and kill the kernel if they are different).
The fix is to stop messing with the preempt count entirely, as this
is already being dealt with in the generic code (irq_enter/irq_exit).
Tested on a dual A53 FPGA running cyclictest.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git commit 9e34f2686bb088b211b6cac8772e1f644c6180f8
"s390/mm,tlb: tlb flush on page table upgrade fixup" removed the
exception handler for the asce-type exception. This is incorrect
as the user-copy with MVCOS can cause asce-type exceptions in
the kernel if a user pointer is too large. Those need to be
handled with do_no_context to branch to the fixup in the
user-copy code.
The simplest fix for this problem is to call do_dat_exception for
asce-type excpetions, as there is no vma for the address the code
will handle the exception correctly.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Git commit 4f37a68cda
"s390: Use direct ktime path for s390 clockevent device" makes use
of the CLOCK_EVT_FEAT_KTIME clockevent option to avoid the delta
calculation with ktime_get() in clockevents_program_event and the
get_tod_clock() in s390_next_event. This is based on the assumption
that the difference between the internal ktime and the hardware
clock is reflected in the wall_to_monotonic delta. But this is not
true, the ntp corrections are applied via changes to the tk->mult
multiplier and this is not reflected in wall_to_monotonic.
In theory this could be solved by using the raw monotonic clock
but it is simpler to switch back to the standard clock delta
calculation.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Switch to the improved update_vsyscall interface that provides
sub-nanosecond precision for gettimeofday and clock_gettime.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
When translating a user space address, the address must be checked against
the ASCE limit of the process. If the address is larger than the maximum
address that is reachable with the ASCE, an ASCE type exception must be
generated.
The current code simply ignored the higher order bits. This resulted in an
address wrap around in user space instead of an exception in user space.
Cc: stable@vger.kernel.org # v3.9+
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
for tmp_part->header.name:
it is "Terminating null required only for names < 12 chars".
so need to limit the %.12s for it in printk
additional info:
%12s limit the width, not for the original string output length
if name length is more than 12, it still can be fully displayed.
if name length is less than 12, the ' ' will be filled before name.
%.12s truly limit the original string output length (precision)
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
In a recent patch:
commit c13f20ac48
Author: Michael Neuling <mikey@neuling.org>
powerpc/signals: Mark VSX not saved with small contexts
We fixed an issue but an improved solution was later discussed after the patch
was merged.
Firstly, this patch doesn't handle the 64bit signals case, which could also hit
this issue (but has never been reported).
Secondly, the original patch isn't clear what MSR VSX should be set to. The
new approach below always clears the MSR VSX bit (to indicate no VSX is in the
context) and sets it only in the specific case where VSX is available (ie. when
VSX has been used and the signal context passed has space to provide the
state).
This reverts the original patch and replaces it with the improved solution. It
also adds a 64 bit version.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When CONFIG_SPARSEMEM_VMEMMAP option is used in kernel, makedumpfile fails
to filter vmcore dump as it fails to do vmemmap translations. So far
dump filtering on ppc64 never had to deal with vmemmap addresses seperately
as vmemmap regions where mapped in zone normal. But with the inclusion of
CONFIG_SPARSEMEM_VMEMMAP config option in kernel, this vmemmap address
translation support becomes necessary for dump filtering. For vmemmap adress
translation, few kernel symbols are needed by dump filtering tool. This patch
adds those symbols to vmcoreinfo, which a dump filtering tool can use for
filtering the kernel dump. Tested this changes successfully with makedumpfile
tool that supports vmemmap to physical address translation outside zone normal.
[ Removed unneeded #ifdef as suggested by Michael Ellerman --BenH ]
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Stephen reported a failure in an allyesconfig build.
CONFIG_CPU_LITTLE_ENDIAN=y gets set but his toolchain is not
new enough to support little endian. We really want to
default to a big endian build; Ben suggested using a choice
which defaults to CPU_BIG_ENDIAN.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
