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This fixes a warning:
warning: override: reassigning to symbol SPI_MESON_SPIFC
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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When a kernel is built without CONFIG_ARM64_MODULE_PLTS, we don't
generate the expected branch instruction in ftrace_make_nop(). This
means we pass zero (rather than a valid branch) to ftrace_modify_code()
as the expected instruction to validate. This causes us to return
-EINVAL to the core ftrace code for a valid case, resulting in a splat
at boot time.
This was an unintended effect of commit:
687644209a6e9557 ("arm64: ftrace: fix building without CONFIG_MODULES")
... which incorrectly moved the generation of the branch instruction
into the ifdef for CONFIG_ARM64_MODULE_PLTS.
This patch fixes the issue by moving the ifdef inside of the relevant
if-else case, and always checking that the branch is in range,
regardless of CONFIG_ARM64_MODULE_PLTS. This ensures that we generate
the expected branch instruction, and also improves our sanity checks.
For consistency, both ftrace_make_nop() and ftrace_make_call() are
updated with this pattern.
Fixes: 687644209a6e9557 ("arm64: ftrace: fix building without CONFIG_MODULES")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reported-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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This patch defines an extra_context signal frame record that can be
used to describe an expanded signal frame, and modifies the context
block allocator and signal frame setup and parsing code to create,
populate, parse and decode this block as necessary.
To avoid abuse by userspace, parse_user_sigframe() attempts to
ensure that:
* no more than one extra_context is accepted;
* the extra context data is a sensible size, and properly placed
and aligned.
The extra_context data is required to start at the first 16-byte
aligned address immediately after the dummy terminator record
following extra_context in rt_sigframe.__reserved[] (as ensured
during signal delivery). This serves as a sanity-check that the
signal frame has not been moved or copied without taking the extra
data into account.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
[will: add __force annotation when casting extra_datap to __user pointer]
Signed-off-by: Will Deacon <will.deacon@arm.com>
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As I found by chance while merging another patch, the usage of
a dma-mask in this DT node is wrong for multiple reasons:
- dma-masks are a Linux specific concept, not a general
hardware feature
- In DT, we use the "dma-ranges" property to describe how DMA
addresses related between devices.
- The 40-bit mask appears to be completely unnecessary here, as
the SoC cannot address that much memory anyway, so simply
asking for a 64-bit mask (as supported by the device) should
succeed anyway.
The patch to remove the parsing of the property is getting merged
through the crypto tree.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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next/arm64
Pull "mvebu arm64 for 4.13 (part 1)" from Gregory CLEMENT
- enable the ICU and GICP drivers for Armada 7K/8K
- enable the pinctrl driver for Armada 7K/8K
* tag 'mvebu-arm64-4.13-1' of git://git.infradead.org/linux-mvebu:
arm64: marvell: enable ICU and GICP drivers
arm64: marvell: enable the Armada 7K/8K pinctrl driver
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next/dt64
mvebu fixes for 4.12
Fix the interrupt description of the crypto node for device tree of
the Armada 7K/8K SoCs
* tag 'mvebu-fixes-4.12-1' of git://git.infradead.org/linux-mvebu:
arm64: marvell: dts: fix interrupts in 7k/8k crypto nodes
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next/dt64
Pull "mvebu dt64 for 4.13 (part 2)" from Gregory CLEMENT:
- use new clock binding for Armada 7K/8K
- add pinctrl on Armada 7K/8K
- add GPIO on Armada 7K/8K
- switch from GIC to ICU on CP110 (Armada 7K/8K)
- enable the mdio node on the mcbin (Armada 8K based board)
* tag 'mvebu-dt64-4.13-2' of git://git.infradead.org/linux-mvebu:
arm64: dts: marvell: enable GICP and ICU on Armada 7K/8K
arm64: dts: marvell: add gpio support for Armada 7K/8K
arm64: dts: marvell: add pinctrl support for Armada 7K/8K
arm64: dts: marvell: use new binding for the system controller on cp110
arm64: dts: marvell: remove *-clock-output-names on cp110
arm64: dts: marvell: use new bindings for xor clocks on ap806
arm64: dts: marvell: mcbin: enable the mdio node
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git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/dt64
Pull "ZTE arm64 device tree updates for 4.13" from Shawn Guo:
- Fix DTC unit_address_vs_reg warnings in OPP entries by replacing
'@' with '-' as the OPP nodes will never have a "reg" property.
* tag 'zte-dt64-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
arm64: dts: zte: Use - instead of @ for DT OPP entries
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This resolves a build error in the next/dt branch:
In file included from arch/arm64/boot/dts/mediatek/mt6797-evb.dts:16:0:
arch/arm64/boot/dts/mediatek/mt6797.dtsi:15:10: fatal error: dt-bindings/power/mt6797-power.h: No such file or directory
003f5d0c3462 ("arm64: dts: mediatek: add clk and scp nodes for MT6797")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The EMAC is present on Qualcomm Technologies' server and some mobile
chips, and is used as the primary Ethernet interface.
Systems that have these SOCs typically have an Atheros 803x or
Marvell 88e1111 PHY in them, so enable those drivers too.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Now that the drivers are available, enable support for L2 and L3
performance monitoring Qualcomm Datacenter Technologies Centriq SoCs.
These PMU drivers provide support for performance optimization.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Enable EDAC (Error Detection and Correction) support for ARM64 server
systems that feature it, so that user space applications can be
notified of memory errors.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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ARM64 server platforms can support ACPI Platform Error Interface (APEI)
and Generic Hardware Error Source (GHES) features, so enable them.
Platforms which support the firmware-first RAS error reporting model
require APEI and GHES functionality for the OS to receive and report
error records provided by the platform.
PCIe AER functionality is required for PCIe AER errors to be properly
reported and recovered from.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Some ARM64 server systems support PCIe hotplug, so enable the options
for that.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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CONFIG_EFI_CAPSULE_LOADER allows the user to update the EFI firmware,
which is useful on ARM64 server platforms.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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NVME is non-volatile storage media attached via PCIe. NVME devices
typically have much higher potential throughput than other block
devices, like SATA, NVME is a must-have requirement for ARM64 based
servers.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The CPPC CPUFreq driver is used on many ACPI-based ARM64 server systems.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Add support for the CC board from Shenzhen Libre Technology
More information about the board are available here:
https://libre.computer/blog/
Cc: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
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Currently external aborts are unsupported by the guest abort
handling. Add handling for SEAs so that the host kernel reports
SEAs which occur in the guest kernel.
When an SEA occurs in the guest kernel, the guest exits and is
routed to kvm_handle_guest_abort(). Prior to this patch, a print
message of an unsupported FSC would be printed and nothing else
would happen. With this patch, the code gets routed to the APEI
handling of SEAs in the host kernel to report the SEA information.
Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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ARM APEI extension proposal added SEA (Synchronous External Abort)
notification type for ARMv8.
Add a new GHES error source handling function for SEA. If an error
source's notification type is SEA, then this function can be registered
into the SEA exception handler. That way GHES will parse and report
SEA exceptions when they occur.
An SEA can interrupt code that had interrupts masked and is treated as
an NMI. To aid this the page of address space for mapping APEI buffers
while in_nmi() is always reserved, and ghes_ioremap_pfn_nmi() is
changed to use the helper methods to find the prot_t to map with in
the same way as ghes_ioremap_pfn_irq().
Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
CC: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Reviewed-by: James Morse <james.morse@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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SEA exceptions are often caused by an uncorrected hardware
error, and are handled when data abort and instruction abort
exception classes have specific values for their Fault Status
Code.
When SEA occurs, before killing the process, report the error
in the kernel logs.
Update fault_info[] with specific SEA faults so that the
new SEA handler is used.
Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
CC: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Reviewed-by: James Morse <james.morse@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
[will: use NULL instead of 0 when assigning si_addr]
Signed-off-by: Will Deacon <will.deacon@arm.com>
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This is really trivial; there is a dup (1 << 16) in the code
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Stefan Traby <stefan@hello-penguin.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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When debugging a kernel panic(), it can be useful to know which CPU
features have been detected by the kernel, as some code paths can depend
on these (and may have been patched at runtime).
This patch adds a notifier to dump the detected CPU caps (as a hex
string) at panic(), when we log other information useful for debugging.
On a Juno R1 system running v4.12-rc5, this looks like:
[ 615.431249] Kernel panic - not syncing: Fatal exception in interrupt
[ 615.437609] SMP: stopping secondary CPUs
[ 615.441872] Kernel Offset: disabled
[ 615.445372] CPU features: 0x02086
[ 615.448522] Memory Limit: none
A developer can decode this by looking at the corresponding
<asm/cpucaps.h> bits. For example, the above decodes as:
* bit 1: ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE
* bit 2: ARM64_WORKAROUND_845719
* bit 7: ARM64_WORKAROUND_834220
* bit 13: ARM64_HAS_32BIT_EL0
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Steve Capper <steve.capper@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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When reading current's user-writable TLS register (which occurs
when dumping core for native tasks), it is possible that userspace
has modified it since the time the task was last scheduled out.
The new TLS register value is not guaranteed to have been written
immediately back to thread_struct in this case.
As a result, a coredump can capture stale data for this register.
Reading the register for a stopped task via ptrace is unaffected.
For native tasks, this patch explicitly flushes the TPIDR_EL0
register back to thread_struct before dumping when operating on
current, thus ensuring that coredump contents are up to date. For
compat tasks, the TLS register is not user-writable and so cannot
be out of sync, so no flush is required in compat_tls_get().
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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When reading the FPSIMD state of current (which occurs when dumping
core), it is possible that userspace has modified the FPSIMD
registers since the time the task was last scheduled out. Such
changes are not guaranteed to be reflected immedately in
thread_struct.
As a result, a coredump can contain stale values for these
registers. Reading the registers of a stopped task via ptrace is
unaffected.
This patch explicitly flushes the CPU state back to thread_struct
before dumping when operating on current, thus ensuring that
coredump contents are up to date.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Currently, VFP registers are omitted from coredumps for compat
processes, due to a bug in the REGSET_COMPAT_VFP regset
implementation.
compat_vfp_get() needs to transfer non-contiguous data from
thread_struct.fpsimd_state, and uses put_user() to handle the
offending trailing word (FPSCR). This fails when copying to a
kernel address (i.e., kbuf && !ubuf), which is what happens when
dumping core. As a result, the ELF coredump core code silently
omits the NT_ARM_VFP note from the dump.
It would be possible to work around this with additional special
case code for the put_user(), but since user_regset_copyout() is
explicitly designed to handle this scenario it is cleaner to port
the put_user() to a user_regset_copyout() call, which this patch
does.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Two entries being added at the same time to the IFLA
policy table, whilst parallel bug fixes to decnet
routing dst handling overlapping with the dst gc removal
in net-next.
Signed-off-by: David S. Miller <davem@davemloft.net>
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This commit enables the newly introduced Marvell GICP and ICUs driver
for the 64-bit Marvell EBU platforms.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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This commit modifies the Marvell EBU Armada 7K and 8K Device Tree files
to describe the ICU and GICP units, and use ICU interrupts for all
devices in the CP110 blocks.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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This commit makes sure the drivers for the Armada 7K/8K pin controllers
are enabled.
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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Compiling the DT file with W=1, DTC warns like follows:
Warning (unit_address_vs_reg): Node /opp_table0/opp@1000000000 has a
unit name, but no reg property
Fix this by replacing '@' with '-' as the OPP nodes will never have a
"reg" property.
Reported-by: Krzysztof Kozlowski <krzk@kernel.org>
Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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https://git.linaro.org/people/john.stultz/linux into timers/core
Merge time(keeping) updates from John Stultz:
"Just a small set of changes, the biggest changes being the MONOTONIC_RAW
handling cleanup, and a new kselftest from Miroslav. Also a a clear
warning deprecating CONFIG_GENERIC_TIME_VSYSCALL_OLD, which affects ppc
and ia64."
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Pick up dependent changes.
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Now that we fixed the sub-ns handling for CLOCK_MONOTONIC_RAW,
remove the duplicitive tk->raw_time.tv_nsec, which can be
stored in tk->tkr_raw.xtime_nsec (similarly to how its handled
for monotonic time).
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Miroslav Lichvar <mlichvar@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Daniel Mentz <danielmentz@google.com>
Tested-by: Daniel Mentz <danielmentz@google.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
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When using sparse on the arm64 tree we get many thousands of
warnings like 'constant ... is so big it is unsigned long long'
or 'shift too big (32) for type unsigned long'. This happens
because by default sparse considers the machine as 32bit and
defines the size of the types accordingly.
Fix this by passing the '-m64' flag to sparse so that
sparse can correctly define longs as being 64bit.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: linux-arm-kernel@lists.infradead.org
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Enable gpio support for CP and AP on the Marvell Armada 7K/8K SoCs.
The Armada 8K has two CP110 blocks, each having two GPIO controllers.
However, in each CP110 block, one of the GPIO controller cannot be
used: in the master CP110, only the second GPIO controller can be used,
while on the slave CP110, only the first GPIO controller can be used.
On the other side, the Armada 7K has only one CP110, but both its GPIO
controllers can be used.
For this reason, the GPIO controllers are marked as "disabled" in the
armada-cp110-master.dtsi and armada-cp110-slave.dtsi files, and only
enabled in the per-SoC dtsi files.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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Enable pinctrl support for CP and AP on the Armada 7K/8K SoCs.
The CP master being different between Armada 7k and Armada 8k. This
commit introduces the intermediates files armada-70x0.dtsi and
armada-80x0.dtsi.
These new files will provide different compatible strings depending of
the SoC family. They will also be the location for the pinmux
configuration at the SoC level.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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The new binding for the system controller on cp110 moved the clock
controller into a subnode. This preliminary step will allow to add gpio
and pinctrl subnodes.
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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The *-clock-output-names of the cp110-system-controller0 node are not
used anymore, so remove them.
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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This patch factors out the allocator for signal frame optional
records into a separate function, to ensure consistency and
facilitate later expansion.
No overrun checking is currently done, because the allocation is in
user memory and anyway the kernel never tries to allocate enough
space in the signal frame yet for an overrun to occur. This
behaviour will be refined in future patches.
The approach taken in this patch to allocation of the terminator
record is not very clean: this will also be replaced in subsequent
patches.
For future extension, a comment is added in sigcontext.h
documenting the current static allocations in __reserved[]. This
will be important for determining under what circumstances
userspace may or may not see an expanded signal frame.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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In preparation for expanding the signal frame, this patch refactors
the signal frame setup code in setup_sigframe() into two separate
passes.
The first pass, setup_sigframe_layout(), determines the size of the
signal frame and its internal layout, including the presence and
location of optional records. The resulting knowledge is used to
allocate and locate the user stack space required for the signal
frame and to determine which optional records to include.
The second pass, setup_sigframe(), is called once the stack frame
is allocated in order to populate it with the necessary context
information.
As a result of these changes, it becomes more natural to represent
locations in the signal frame by a base pointer and an offset,
since the absolute address of each location is not known during the
layout pass. To be more consistent with this logic,
parse_user_sigframe() is refactored to describe signal frame
locations in a similar way.
This change has no effect on the signal ABI, but will make it
easier to expand the signal frame in future patches.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Currently, rt_sigreturn does very limited checking on the
sigcontext coming from userspace.
Future additions to the sigcontext data will increase the potential
for surprises. Also, it is not clear whether the sigcontext
extension records are supposed to occur in a particular order.
To allow the parsing code to be extended more easily, this patch
factors out the sigcontext parsing into a separate function, and
adds extra checks to validate the well-formedness of the sigcontext
structure.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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In order to be able to increase the amount of the data currently
written to the __reserved[] array in the signal frame, it is
necessary to overwrite the locations currently occupied by the
{fp,lr} frame link record pushed at the top of the signal stack.
In order for this to work, this patch detaches the frame link
record from struct rt_sigframe and places it separately at the top
of the signal stack. This will allow subsequent patches to insert
data between it and __reserved[].
This change relies on the non-ABI status of the placement of the
frame record with respect to struct sigframe: this status is
undocumented, but the placement is not declared or described in the
user headers, and known unwinder implementations (libgcc,
libunwind, gdb) appear not to rely on it.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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To avoid issues with the /proc/kcore code getting confused about the
kernels block mappings in the VMALLOC region, enable the existing
facility that describes the [_text, _end) interval as a separate
KCORE_TEXT region, which supersedes the KCORE_VMALLOC region that
it intersects with on arm64.
Reported-by: Tan Xiaojun <tanxiaojun@huawei.com>
Tested-by: Tan Xiaojun <tanxiaojun@huawei.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Conflicts:
kernel/sched/Makefile
Pick up the waitqueue related renames - it didn't get much feedback,
so it appears to be uncontroversial. Famous last words? ;-)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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New bindings are used for the system controller on the ap806, which
means all clock properties must be converted. Use the new bindings in
the xor nodes.
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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Since the mdio nodes are disabled by default now, we should explicitly
enable these nodes at the board level when they are used. Enable the
cpm_mdio node for the 8040-mcbin.
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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The dma alloc interface returns an error by return NULL, and the
mapping interfaces rely on the mapping_error method, which the dummy
ops already implement correctly.
Thus remove the DMA_ERROR_CODE define.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
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Recently vDSO support for CLOCK_MONOTONIC_RAW was added in
49eea433b326 ("arm64: Add support for CLOCK_MONOTONIC_RAW in
clock_gettime() vDSO"). Noticing that the core timekeeping code
never set tkr_raw.xtime_nsec, the vDSO implementation didn't
bother exposing it via the data page and instead took the
unshifted tk->raw_time.tv_nsec value which was then immediately
shifted left in the vDSO code.
Unfortunately, by accellerating the MONOTONIC_RAW clockid, it
uncovered potential 1ns time inconsistencies caused by the
timekeeping core not handing sub-ns resolution.
Now that the core code has been fixed and is actually setting
tkr_raw.xtime_nsec, we need to take that into account in the
vDSO by adding it to the shifted raw_time value, in order to
fix the user-visible inconsistency. Rather than do that at each
use (and expand the data page in the process), instead perform
the shift/addition operation when populating the data page and
remove the shift from the vDSO code entirely.
[jstultz: minor whitespace tweak, tried to improve commit
message to make it more clear this fixes a regression]
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Tested-by: Daniel Mentz <danielmentz@google.com>
Acked-by: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: "stable #4 . 8+" <stable@vger.kernel.org>
Cc: Miroslav Lichvar <mlichvar@redhat.com>
Link: http://lkml.kernel.org/r/1496965462-20003-4-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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