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Calling apply_to_page_range with an empty range results in a BUG_ON
from the core code. This can be triggered by trying to load the st_drv
module with CONFIG_DEBUG_SET_MODULE_RONX enabled:
kernel BUG at mm/memory.c:1874!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Modules linked in:
CPU: 3 PID: 1764 Comm: insmod Not tainted 4.5.0-rc1+ #2
Hardware name: ARM Juno development board (r0) (DT)
task: ffffffc9763b8000 ti: ffffffc975af8000 task.ti: ffffffc975af8000
PC is at apply_to_page_range+0x2cc/0x2d0
LR is at change_memory_common+0x80/0x108
This patch fixes the issue by making change_memory_common (called by the
set_memory_* functions) a NOP when numpages == 0, therefore avoiding the
erroneous call to apply_to_page_range and bringing us into line with x86
and s390.
Cc: <stable@vger.kernel.org>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Mika Penttilä <mika.penttila@nextfour.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Based on requests, update our defconfig so that:
- We don't build any modules
- PL031 is enabled (RTC emulated by qemu)
- Xen guest support is enabled
- The Uniphier built-in I2C controller is enabled
- PCI host controller drivers for the various arm64 SoCs are enabled
- Device passthrough works on Seattle using SMMU and VFIO
- The Hisilicon IRQ controller (mbigen) is enabled
Signed-off-by: Will Deacon <will.deacon@arm.com>
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GCC6 (and Linaro's 2015.12 snapshot of GCC5) has a new default that uses
adrp/ldr or adrp/add to address literal pools. When CONFIG_ARM64_ERRATUM_843419
is enabled, modules built with this toolchain fail to load:
module libahci: unsupported RELA relocation: 275
This patch fixes the problem by passing '-mpc-relative-literal-loads'
to the compiler.
Cc: stable@vger.kernel.org
Fixes: df057cc7b4fa ("arm64: errata: add module build workaround for erratum #843419")
BugLink: http://bugs.launchpad.net/bugs/1533009
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Suggested-by: Christophe Lyon <christophe.lyon@linaro.org>
Signed-off-by: Dann Frazier <dann.frazier@canonical.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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By default the aarch64 gcc generates .eh_frame sections. Unlike
.debug_frame sections, the .eh_frame sections are loaded into memory
when the associated code is loaded. On an example kernel being built
with this default the .eh_frame section in vmlinux used an extra 1.7MB
of memory. The x86 disables the creation of the .eh_frame section.
The aarch64 should probably do the same to save some memory.
Signed-off-by: William Cohen <wcohen@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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This patch fixes a typo in mm/dump.c:
"MODUELS_END_NR" should be "MODULES_END_NR".
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Currently, set_pte_at() only checks the software PTE_WRITE bit for user
mappings when it sets or clears the hardware PTE_RDONLY accordingly. The
kernel ptes are written directly without any modification, relying
solely on the protection bits in macros like PAGE_KERNEL. However,
modifying kernel pte attributes via pte_wrprotect() would be ignored by
set_pte_at(). Since pte_wrprotect() does not set PTE_RDONLY (it only
clears PTE_WRITE), the new permission is not taken into account.
This patch changes set_pte_at() to adjust the read-only permission for
kernel ptes as well. As a side effect, existing PROT_* definitions used
for kernel ioremap*() need to include PTE_DIRTY | PTE_WRITE.
(additionally, white space fix for PTE_KERNEL_ROX)
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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The Performance Monitors extension is an optional feature of the
AArch64 architecture, therefore, in order to access Performance
Monitors registers safely, the kernel should detect the architected
PMU unit presence through the ID_AA64DFR0_EL1 register PMUVer field
before accessing them.
This patch implements a guard by reading the ID_AA64DFR0_EL1 register
PMUVer field to detect the architected PMU presence and prevent accessing
PMU system registers if the Performance Monitors extension is not
implemented in the core.
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: <stable@vger.kernel.org>
Fixes: 60792ad349f3 ("arm64: kernel: enforce pmuserenr_el0 initialization and restore")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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When switching from the early KASAN shadow region, which maps the
entire shadow space read-write, to the permanent KASAN shadow region,
which uses a zero page to shadow regions that are not subject to
instrumentation, the lowest level table kasan_zero_pte[] may be
reused unmodified, which means that the mappings of the zero page
that it contains will still be read-write.
So update it explicitly to map the zero page read only when we
activate the permanent mapping.
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Commit e8f3010f7326 ("arm64/efi: isolate EFI stub from the kernel
proper") isolated the EFI stub code from the kernel proper by prefixing
all of its symbols with __efistub_, and selectively allowing access to
core kernel symbols from the stub by emitting __efistub_ aliases for
functions and variables that the stub can access legally.
As an unintended side effect, these aliases are emitted into the
kallsyms symbol table, which means they may turn up in backtraces,
e.g.,
...
PC is at __efistub_memset+0x108/0x200
LR is at fixup_init+0x3c/0x48
...
[<ffffff8008328608>] __efistub_memset+0x108/0x200
[<ffffff8008094dcc>] free_initmem+0x2c/0x40
[<ffffff8008645198>] kernel_init+0x20/0xe0
[<ffffff8008085cd0>] ret_from_fork+0x10/0x40
The backtrace in question has nothing to do with the EFI stub, but
simply returns one of the several aliases of memset() that have been
recorded in the kallsyms table. This is undesirable, since it may
suggest to people who are not aware of this that the issue they are
seeing is somehow EFI related.
So hide the __efistub_ aliases from kallsyms, by emitting them as
absolute linker symbols explicitly. The distinction between those
and section relative symbols is completely irrelevant to these
definitions, and to the final link we are performing when these
definitions are being taken into account (the distinction is only
relevant to symbols defined inside a section definition when performing
a partial link), and so the resulting values are identical to the
original ones. Since absolute symbols are ignored by kallsyms, this
will result in these values to be omitted from its symbol table.
After this patch, the backtrace generated from the same address looks
like this:
...
PC is at __memset+0x108/0x200
LR is at fixup_init+0x3c/0x48
...
[<ffffff8008328608>] __memset+0x108/0x200
[<ffffff8008094dcc>] free_initmem+0x2c/0x40
[<ffffff8008645198>] kernel_init+0x20/0xe0
[<ffffff8008085cd0>] ret_from_fork+0x10/0x40
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC support for Tegra platforms from Olof Johansson:
"Here's a single-SoC topic branch that we've staged separately. Mainly
because it was hard to sort the branch contents in a way that fit our
existing branches due to some refactorings.
The code has been in -next for quite a while, but we staged it in
arm-soc a bit late, which is why we've kept it separate from the other
updates and are sending it separately here"
* tag 'armsoc-tegra' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm64: tegra: Add NVIDIA Jetson TX1 Developer Kit support
arm64: tegra: Add NVIDIA P2597 I/O board support
arm64: tegra: Add NVIDIA Jetson TX1 support
arm64: tegra: Add NVIDIA P2571 board support
arm64: tegra: Add NVIDIA P2371 board support
arm64: tegra: Add NVIDIA P2595 I/O board support
arm64: tegra: Add NVIDIA P2530 main board support
arm64: tegra: Add Tegra210 support
arm64: tegra: Add NVIDIA Tegra132 Norrin support
arm64: tegra: Add Tegra132 support
ARM: tegra: select USB_ULPI from EHCI rather than platform
ARM: tegra: Ensure entire dcache is flushed on entering LP0/1
amba: Hide TEGRA_AHB symbol
soc/tegra: Add Tegra210 support
soc/tegra: Provide per-SoC Kconfig symbols
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Merge third patch-bomb from Andrew Morton:
"I'm pretty much done for -rc1 now:
- the rest of MM, basically
- lib/ updates
- checkpatch, epoll, hfs, fatfs, ptrace, coredump, exit
- cpu_mask simplifications
- kexec, rapidio, MAINTAINERS etc, etc.
- more dma-mapping cleanups/simplifications from hch"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (109 commits)
MAINTAINERS: add/fix git URLs for various subsystems
mm: memcontrol: add "sock" to cgroup2 memory.stat
mm: memcontrol: basic memory statistics in cgroup2 memory controller
mm: memcontrol: do not uncharge old page in page cache replacement
Documentation: cgroup: add memory.swap.{current,max} description
mm: free swap cache aggressively if memcg swap is full
mm: vmscan: do not scan anon pages if memcg swap limit is hit
swap.h: move memcg related stuff to the end of the file
mm: memcontrol: replace mem_cgroup_lruvec_online with mem_cgroup_online
mm: vmscan: pass memcg to get_scan_count()
mm: memcontrol: charge swap to cgroup2
mm: memcontrol: clean up alloc, online, offline, free functions
mm: memcontrol: flatten struct cg_proto
mm: memcontrol: rein in the CONFIG space madness
net: drop tcp_memcontrol.c
mm: memcontrol: introduce CONFIG_MEMCG_LEGACY_KMEM
mm: memcontrol: allow to disable kmem accounting for cgroup2
mm: memcontrol: account "kmem" consumers in cgroup2 memory controller
mm: memcontrol: move kmem accounting code to CONFIG_MEMCG
mm: memcontrol: separate kmem code from legacy tcp accounting code
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Olof Johansson:
"Driver updates for ARM SoCs. Some for SoC-family code under
drivers/soc, but also some other driver updates that don't belong
anywhere else. We also bring in the drivers/reset code through
arm-soc.
Some of the larger updates:
- Qualcomm support for SMEM, SMSM, SMP2P. All used to communicate
with other parts of the chip/board on these platforms, all
proprietary protocols that don't fit into other subsystems and live
in drivers/soc for now.
- System bus driver for UniPhier
- Driver for the TI Wakeup M3 IPC device
- Power management for Raspberry PI
+ Again a bunch of other smaller updates and patches"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (38 commits)
bus: uniphier: allow only built-in driver
ARM: bcm2835: clarify RASPBERRYPI_FIRMWARE dependency
MAINTAINERS: Drop Kumar Gala from QCOM
bus: uniphier-system-bus: add UniPhier System Bus driver
ARM: bcm2835: add rpi power domain driver
dt-bindings: add rpi power domain driver bindings
ARM: bcm2835: Define two new packets from the latest firmware.
drivers/soc: make mediatek/mtk-scpsys.c explicitly non-modular
soc: mediatek: SCPSYS: Add regulator support
MAINTAINERS: Change QCOM entries
soc: qcom: smd-rpm: Add existing platform support
memory/tegra: Add number of TLB lines for Tegra124
reset: hi6220: fix modular build
soc: qcom: Introduce WCNSS_CTRL SMD client
ARM: qcom: select ARM_CPU_SUSPEND for power management
MAINTAINERS: Add rules for Qualcomm dts files
soc: qcom: enable smsm/smp2p modular build
serial: msm_serial: Make config tristate
soc: qcom: smp2p: Qualcomm Shared Memory Point to Point
soc: qcom: smsm: Add driver for Qualcomm SMSM
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM 64-bit defconfig updates from Olof Johansson:
"As mentioned earlier, we usually bake this into the general "arm64"
branch, but this release we have partitioned up the updates a bit
more.
Most of these updates are enabling new SoCs in the single defconfig
for 64-bit, Renesas R8A7795, a number of Tegra options, Socionext
Uniphier and a handful of new options for other platforms as well"
* tag 'armsoc-defconfig64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm64: mediatek: enable MTK_TIMER
arm64: defconfig: add CS2000 support
arm64: defconfig: Add Renesas R-Car SATA driver for R-Car Gen3 SoCs
arm64: defconfig: enable UniPhier SoCs support
arm64: add Kconfig entry for Socionext UniPhier SoC family
arm64: defconfig: add Renesas sound and AK4613 support
arm64: defconfig: add Renesas R-Car DMAC driver support
arm64: defconfig: Enable Renesas R-Car I2C Controller
arm64: defconfig: enable EthernetAVB
arm64: defconfig: Enable GPIO of Renesas R-Car Gen3 SoC
arm64: berlin: add the pinctrl dependency for Marvell Berlin SoCs
arm64: defconfig: renesas: Enable Renesas r8a7795 SoC
arm64: defconfig: Enable printk timestamps
arm64: defconfig: Enable squashfs support
arm64: defconfig: Enable sdhci-tegra driver
arm64: defconfig: Enable serial-tegra driver
arm64: defconfig: Enable tegra-apbdma driver
arm64: defconfig: Do not disable Tegra AHB driver
arm64: defconfig: Enable Tegra210 support
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM 64-bit DT updates from Olof Johansson:
"This is the first release where we split up the 64-bit contributions a
bit more, and in particular we are having a separate DT branch for
them.
Contents:
- New devices added to Broadcom NorthStar2
- Misc fixes for Exynos7 boards
- QCOM updates for MSM8916
- Rockchip tweaks for rk3368 SoC and eval board
- A series of fixes for APM X-Gene v1 and v2
- Renesas R8A7795 CPU/PSCI additions
- Marvell Berlin4CT PSCI, cpuidle, watchdog portions
- Freescale LS1043a SoC and dev board support
+ some treewide or other misc changes"
* tag 'armsoc-dt64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (104 commits)
dts/ls2080a: Update DTSI to add support of SP805 WDT
Documentation: DT: Add entry for ARM SP805-WDT
arm64: dts: X-Gene v2: I2C1 clock is always on
arm64: dts: X-Gene v1: I2C0 clock is always on
arm64: dts: Fix to use standard DT node names for X-Gene 1 and X-Gene 2 platforms
arm64: dts: hikey: add label properties to UARTs
arm64: dts: apq8016-sbc: add label properties for UART, I2C, and SPI
arm64: dts: apq8016-sbc: enable UART0 on LS connector
arm64: dts: juno: Add idle-states to device tree
arm64: dts: Added syscon-reboot node for FSL's LS2080A SoC
arm64: dts: add LS1043a-RDB board support
arm64: dts: add Freescale LS1043a SoC support
Documentation: DT: Add entry for Freescale LS1043a-RDB board
arm64: dts: uniphier: add PH1-LD10 SoC/board support
arm64: renesas: r8a7795: fix SATA clock assignment
arm64: dts: salvator-x: Enable SATA controller
arm64: dts: r8a7795: Add SATA controller node
arm64: renesas: r8a7795: add internal delay for i2c IPs
arm64: renesas: salvator-x: Add board part number to DT bindings
arm64: dts: r8a7795: Add pmu device nodes
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM DT updates from Olof Johansson:
"As usual, the bulk of this release is again DT file contents.
There's a huge number of changes here, and it's challenging to give a
crisp overview of just what is in here. To start with:
New boards:
- TI-based DM3730 from LogicPD (Torpedo)
- Cosmic+ M4 (nommu) initial support (Freescale Vybrid)
- Raspberry Pi 2 DT files
- Watchdog on Meson8b
- Veyron-mickey (ASUS Chromebit) DTS
- Rockchip rk3228 SoC and eval board
- Sigma Designs Tango4
Improvements:
- Improved support for Qualcomm APQ8084, including Sony Xperia Z DT files
- Misc new devices for Rockchip rk3036 and rk3288
- Allwinner updates for misc SoCs and systems
... and a _large_ number of other changes across the field. Devices
added to SoC DTSI and board DTS files for a number of SoC vendors, new
product boards on already-supported SoCs, cleanups and refactorings of
existing DTS/DTSI files and a bunch of other changes"
* tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (469 commits)
ARM: dts: compulab: add new board description
ARM: versatile: add the syscon LEDs to the DT
dts: vt8500: Fix errors in SDHC node for WM8505
ARM: dts: imx6q: clean up unused ipu2grp
ARM: dts: silk: Add compatible property to "partitions" node
ARM: dts: gose: Add compatible property to "partitions" node
ARM: dts: porter: Add compatible property to "partitions" node
ARM: dts: koelsch: Add compatible property to "partitions" node
ARM: dts: lager: Add compatible property to "partitions" node
ARM: dts: bockw: Add compatible property to "partitions" node
ARM: dts: meson8b: Add watchdog node
Documentation: watchdog: Add new bindings for meson8b
ARM: meson: Add status LED for Odroid-C1
ARM: dts: uniphier: fix a typo in comment block
ARM: bcm2835: Add the auxiliary clocks to the device tree.
ARM: bcm2835: Add devicetree for bcm2836 and Raspberry Pi 2 B
ARM: bcm2835: Move the CPU/peripheral include out of common RPi DT.
ARM: bcm2835: Split the DT for peripherals from the DT for the CPU
ARM: realview: set up cache correctly on the PB11MPCore
ARM: dts: Unify G2D device node with other devices on exynos4
...
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Move the generic implementation to <linux/dma-mapping.h> now that all
architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
that everyone supports them.
[valentinrothberg@gmail.com: remove leftovers in Kconfig]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Helge Deller <deller@gmx.de>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull virtio barrier rework+fixes from Michael Tsirkin:
"This adds a new kind of barrier, and reworks virtio and xen to use it.
Plus some fixes here and there"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (44 commits)
checkpatch: add virt barriers
checkpatch: check for __smp outside barrier.h
checkpatch.pl: add missing memory barriers
virtio: make find_vqs() checkpatch.pl-friendly
virtio_balloon: fix race between migration and ballooning
virtio_balloon: fix race by fill and leak
s390: more efficient smp barriers
s390: use generic memory barriers
xen/events: use virt_xxx barriers
xen/io: use virt_xxx barriers
xenbus: use virt_xxx barriers
virtio_ring: use virt_store_mb
sh: move xchg_cmpxchg to a header by itself
sh: support 1 and 2 byte xchg
virtio_ring: update weak barriers to use virt_xxx
Revert "virtio_ring: Update weak barriers to use dma_wmb/rmb"
asm-generic: implement virt_xxx memory barriers
x86: define __smp_xxx
xtensa: define __smp_xxx
tile: define __smp_xxx
...
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Pull more networking fixes from David Miller:
1) Fix brcmfmac build with older gcc, from Arend van Spriel.
2) IRQ values unintentionally truncated to u8 in mlx5 driver, from
Doron Tsur.
3) Fix build warnings wrt tcp cgroup changes, from Geert Uytterhoeven.
4) Limit deep recursion in ovs stack, from Hannes Frederic Sowa.
5) at803x phy driver bug fixes from, Martin Blumenstingl.
6) Fix TSO handling in hns driver, from Daode Huang
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (22 commits)
ovs: limit ovs recursions in ovs_execute_actions to not corrupt stack
team: Replace rcu_read_lock with a mutex in team_vlan_rx_kill_vid
net: hns: bug fix about hisilicon TSO BD mode
brcmfmac: fix BRCMF_FW_NVRAM_DEF macro for older gcc compilers
net: phy: at803x: Add the interrupt register bit definitions
net: phy: at803x: Clean up duplicate register definitions
net: phy: at803x: Allow specifying the RGMII RX clock delay via phy mode
net: phy: at803x: Don't set gbit features for the AR8030 phy
arm64: bpf: add extra pass to handle faulty codegen
arm64: insn: remove BUG_ON from codegen
sctp: the temp asoc's transports should not be hashed/unhashed
net/mlx5_core: Fix trimming down IRQ number
tcp_memcontrol: Forward declare cgroup_subsys and mem_cgroup stucts
batman-adv: Drop immediate orig_node free function
batman-adv: Drop immediate batadv_hard_iface free function
batman-adv: Drop immediate neigh_ifinfo free function
batman-adv: Drop immediate batadv_hardif_neigh_node free function
batman-adv: Drop immediate batadv_neigh_node free function
batman-adv: Drop immediate batadv_orig_ifinfo free function
batman-adv: Avoid recursive call_rcu for batadv_nc_node
...
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Code generation functions in arch/arm64/kernel/insn.c previously
BUG_ON invalid parameters. Following change of that behavior, now we
need to handle the error case where AARCH64_BREAK_FAULT is returned.
Instead of error-handling on every emit() in JIT, we add a new
validation pass at the end of JIT compilation. There's no point in
running JITed code at run-time only to trap due to AARCH64_BREAK_FAULT.
Instead, we drop this failed JIT compilation and allow the system to
gracefully fallback on the BPF interpreter.
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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During code generation, we used to BUG_ON unknown/unsupported encoding
or invalid parameters.
Instead, now we report these as errors and simply return the
instruction AARCH64_BREAK_FAULT. Users of these codegen helpers should
check for and handle this failure condition as appropriate.
Otherwise, unhandled codegen failure will result in trapping at
run-time due to AARCH64_BREAK_FAULT, which is arguably better than a
BUG_ON.
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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To date, we have implemented two I/O usage models for persistent memory,
PMEM (a persistent "ram disk") and DAX (mmap persistent memory into
userspace). This series adds a third, DAX-GUP, that allows DAX mappings
to be the target of direct-i/o. It allows userspace to coordinate
DMA/RDMA from/to persistent memory.
The implementation leverages the ZONE_DEVICE mm-zone that went into
4.3-rc1 (also discussed at kernel summit) to flag pages that are owned
and dynamically mapped by a device driver. The pmem driver, after
mapping a persistent memory range into the system memmap via
devm_memremap_pages(), arranges for DAX to distinguish pfn-only versus
page-backed pmem-pfns via flags in the new pfn_t type.
The DAX code, upon seeing a PFN_DEV+PFN_MAP flagged pfn, flags the
resulting pte(s) inserted into the process page tables with a new
_PAGE_DEVMAP flag. Later, when get_user_pages() is walking ptes it keys
off _PAGE_DEVMAP to pin the device hosting the page range active.
Finally, get_page() and put_page() are modified to take references
against the device driver established page mapping.
Finally, this need for "struct page" for persistent memory requires
memory capacity to store the memmap array. Given the memmap array for a
large pool of persistent may exhaust available DRAM introduce a
mechanism to allocate the memmap from persistent memory. The new
"struct vmem_altmap *" parameter to devm_memremap_pages() enables
arch_add_memory() to use reserved pmem capacity rather than the page
allocator.
This patch (of 18):
The core has developed a need for a "pfn_t" type [1]. Move the existing
pfn_t in KVM to kvm_pfn_t [2].
[1]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002199.html
[2]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002218.html
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
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MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent overwrite
of the contents since MADV_FREE syscall is called for THP page.
This patch adds pmd_mkclean for THP page MADV_FREE support.
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Shaohua Li <shli@kernel.org>
Cc: <yalin.wang2010@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Gang <gang.chen.5i5j@gmail.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Daniel Micay <danielmicay@gmail.com>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Helge Deller <deller@gmx.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Jason Evans <je@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mika Penttil <mika.penttila@nextfour.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Rik van Riel <riel@redhat.com>
Cc: Roland Dreier <roland@kernel.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Shaohua Li <shli@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
With new refcounting we don't need to mark PMDs splitting. Let's drop
code to handle this.
pmdp_splitting_flush() is not needed too: on splitting PMD we will do
pmdp_clear_flush() + set_pte_at(). pmdp_clear_flush() will do IPI as
needed for fast_gup.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Pull networking fixes from David Miller:
"A quick set of bug fixes after there initial networking merge:
1) Netlink multicast group storage allocator only was tested with
nr_groups equal to 1, make it work for other values too. From
Matti Vaittinen.
2) Check build_skb() return value in macb and hip04_eth drivers, from
Weidong Wang.
3) Don't leak x25_asy on x25_asy_open() failure.
4) More DMA map/unmap fixes in 3c59x from Neil Horman.
5) Don't clobber IP skb control block during GSO segmentation, from
Konstantin Khlebnikov.
6) ECN helpers for ipv6 don't fixup the checksum, from Eric Dumazet.
7) Fix SKB segment utilization estimation in xen-netback, from David
Vrabel.
8) Fix lockdep splat in bridge addrlist handling, from Nikolay
Aleksandrov"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (26 commits)
bgmac: Fix reversed test of build_skb() return value.
bridge: fix lockdep addr_list_lock false positive splat
net: smsc: Add support h8300
xen-netback: free queues after freeing the net device
xen-netback: delete NAPI instance when queue fails to initialize
xen-netback: use skb to determine number of required guest Rx requests
net: sctp: Move sequence start handling into sctp_transport_get_idx()
ipv6: update skb->csum when CE mark is propagated
net: phy: turn carrier off on phy attach
net: macb: clear interrupts when disabling them
sctp: support to lookup with ep+paddr in transport rhashtable
net: hns: fixes no syscon error when init mdio
dts: hisi: fixes no syscon fault when init mdio
net: preserve IP control block during GSO segmentation
fsl/fman: Delete one function call "put_device" in dtsec_config()
hip04_eth: fix missing error handle for build_skb failed
3c59x: fix another page map/single unmap imbalance
3c59x: balance page maps and unmaps
x25_asy: Free x25_asy on x25_asy_open() failure.
mlxsw: fix SWITCHDEV_OBJ_ID_PORT_MDB
...
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When linux start up, we get the log below:
"Hi-HNS_MDIO 803c0000.mdio: no syscon hisilicon,peri-c-subctrl
mdio_bus mdio@803c0000: mdio sys ctl reg has not maped"
The source code about the subctrl is dealt syscon, but dts doesn't.
It cause such fault, so this patch adds the syscon info on dts files to
fixes it.
Signed-off-by: Kejian Yan <yankejian@huawei.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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arm64: arch_mmap_rnd() uses STACK_RND_MASK to generate the random offset
for the mmap base address. This value represents a compromise between
increased ASLR effectiveness and avoiding address-space fragmentation.
Replace it with a Kconfig option, which is sensibly bounded, so that
platform developers may choose where to place this compromise. Keep
default values as new minimums.
Signed-off-by: Daniel Cashman <dcashman@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Nick Kralevich <nnk@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Hector Marco-Gisbert <hecmargi@upv.es>
Cc: Borislav Petkov <bp@suse.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
"The bulk of this has appeared in -next and independently received a
build success notification from the kbuild robot. The 'for-4.5/block-
dax' topic branch was rebased over the weekend to drop the "block
device end-of-life" rework that Al would like to see re-implemented
with a notifier, and to address bug reports against the badblocks
integration.
There is pending feedback against "libnvdimm: Add a poison list and
export badblocks" received last week. Linda identified some localized
fixups that we will handle incrementally.
Summary:
- Media error handling: The 'badblocks' implementation that
originated in md-raid is up-levelled to a generic capability of a
block device. This initial implementation is limited to being
consulted in the pmem block-i/o path. Later, 'badblocks' will be
consulted when creating dax mappings.
- Raw block device dax: For virtualization and other cases that want
large contiguous mappings of persistent memory, add the capability
to dax-mmap a block device directly.
- Increased /dev/mem restrictions: Add an option to treat all
io-memory as IORESOURCE_EXCLUSIVE, i.e. disable /dev/mem access
while a driver is actively using an address range. This behavior
is controlled via the new CONFIG_IO_STRICT_DEVMEM option and can be
overridden by the existing "iomem=relaxed" kernel command line
option.
- Miscellaneous fixes include a 'pfn'-device huge page alignment fix,
block device shutdown crash fix, and other small libnvdimm fixes"
* tag 'libnvdimm-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (32 commits)
block: kill disk_{check|set|clear|alloc}_badblocks
libnvdimm, pmem: nvdimm_read_bytes() badblocks support
pmem, dax: disable dax in the presence of bad blocks
pmem: fail io-requests to known bad blocks
libnvdimm: convert to statically allocated badblocks
libnvdimm: don't fail init for full badblocks list
block, badblocks: introduce devm_init_badblocks
block: clarify badblocks lifetime
badblocks: rename badblocks_free to badblocks_exit
libnvdimm, pmem: move definition of nvdimm_namespace_add_poison to nd.h
libnvdimm: Add a poison list and export badblocks
nfit_test: Enable DSMs for all test NFITs
md: convert to use the generic badblocks code
block: Add badblock management for gendisks
badblocks: Add core badblock management code
block: fix del_gendisk() vs blkdev_ioctl crash
block: enable dax for raw block devices
block: introduce bdev_file_inode()
restrict /dev/mem to idle io memory ranges
arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug
...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB updates from Greg KH:
"Here is the big USB drivers update for 4.5-rc1.
Lots of gadget driver updates and fixes, like usual, and a mix of
other USB driver updates as well. Full details in the shortlog. All
of these have been in linux-next for a while"
* tag 'usb-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (191 commits)
MAINTAINERS: change my email address
USB: usbmon: remove assignment from IS_ERR argument
USB: mxu11x0: drop redundant function name from error messages
USB: mxu11x0: fix debug-message typos
USB: mxu11x0: rename usb-serial driver
USB: mxu11x0: fix modem-control handling on B0-transitions
USB: mxu11x0: fix memory leak on firmware download
USB: mxu11x0: fix memory leak in port-probe error path
USB: serial: add Moxa UPORT 11x0 driver
USB: cp210x: add ID for ELV Marble Sound Board 1
usb: chipidea: otg: use usb autosuspend to suspend bus for HNP
usb: chipidea: host: set host to be null after hcd is freed
usb: chipidea: removing of_find_property
usb: chipidea: implement platform shutdown callback
usb: chipidea: clean up CONFIG_USB_CHIPIDEA_DEBUG reference
usb: chipidea: delete static debug support
usb: chipidea: support debugfs without CONFIG_USB_CHIPIDEA_DEBUG
usb: chipidea: udc: improve error handling on _hardware_enqueue
usb: chipidea: udc: _ep_queue and _hw_queue cleanup
usb: dwc3: of-simple: fix build warning on !PM
...
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Pull networking updates from Davic Miller:
1) Support busy polling generically, for all NAPI drivers. From Eric
Dumazet.
2) Add byte/packet counter support to nft_ct, from Floriani Westphal.
3) Add RSS/XPS support to mvneta driver, from Gregory Clement.
4) Implement IPV6_HDRINCL socket option for raw sockets, from Hannes
Frederic Sowa.
5) Add support for T6 adapter to cxgb4 driver, from Hariprasad Shenai.
6) Add support for VLAN device bridging to mlxsw switch driver, from
Ido Schimmel.
7) Add driver for Netronome NFP4000/NFP6000, from Jakub Kicinski.
8) Provide hwmon interface to mlxsw switch driver, from Jiri Pirko.
9) Reorganize wireless drivers into per-vendor directories just like we
do for ethernet drivers. From Kalle Valo.
10) Provide a way for administrators "destroy" connected sockets via the
SOCK_DESTROY socket netlink diag operation. From Lorenzo Colitti.
11) Add support to add/remove multicast routes via netlink, from Nikolay
Aleksandrov.
12) Make TCP keepalive settings per-namespace, from Nikolay Borisov.
13) Add forwarding and packet duplication facilities to nf_tables, from
Pablo Neira Ayuso.
14) Dead route support in MPLS, from Roopa Prabhu.
15) TSO support for thunderx chips, from Sunil Goutham.
16) Add driver for IBM's System i/p VNIC protocol, from Thomas Falcon.
17) Rationalize, consolidate, and more completely document the checksum
offloading facilities in the networking stack. From Tom Herbert.
18) Support aborting an ongoing scan in mac80211/cfg80211, from
Vidyullatha Kanchanapally.
19) Use per-bucket spinlock for bpf hash facility, from Tom Leiming.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1375 commits)
net: bnxt: always return values from _bnxt_get_max_rings
net: bpf: reject invalid shifts
phonet: properly unshare skbs in phonet_rcv()
dwc_eth_qos: Fix dma address for multi-fragment skbs
phy: remove an unneeded condition
mdio: remove an unneed condition
mdio_bus: NULL dereference on allocation error
net: Fix typo in netdev_intersect_features
net: freescale: mac-fec: Fix build error from phy_device API change
net: freescale: ucc_geth: Fix build error from phy_device API change
bonding: Prevent IPv6 link local address on enslaved devices
IB/mlx5: Add flow steering support
net/mlx5_core: Export flow steering API
net/mlx5_core: Make ipv4/ipv6 location more clear
net/mlx5_core: Enable flow steering support for the IB driver
net/mlx5_core: Initialize namespaces only when supported by device
net/mlx5_core: Set priority attributes
net/mlx5_core: Connect flow tables
net/mlx5_core: Introduce modify flow table command
net/mlx5_core: Managing root flow table
...
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|
Pull KVM updates from Paolo Bonzini:
"PPC changes will come next week.
- s390: Support for runtime instrumentation within guests, support of
248 VCPUs.
- ARM: rewrite of the arm64 world switch in C, support for 16-bit VM
identifiers. Performance counter virtualization missed the boat.
- x86: Support for more Hyper-V features (synthetic interrupt
controller), MMU cleanups"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (115 commits)
kvm: x86: Fix vmwrite to SECONDARY_VM_EXEC_CONTROL
kvm/x86: Hyper-V SynIC timers tracepoints
kvm/x86: Hyper-V SynIC tracepoints
kvm/x86: Update SynIC timers on guest entry only
kvm/x86: Skip SynIC vector check for QEMU side
kvm/x86: Hyper-V fix SynIC timer disabling condition
kvm/x86: Reorg stimer_expiration() to better control timer restart
kvm/x86: Hyper-V unify stimer_start() and stimer_restart()
kvm/x86: Drop stimer_stop() function
kvm/x86: Hyper-V timers fix incorrect logical operation
KVM: move architecture-dependent requests to arch/
KVM: renumber vcpu->request bits
KVM: document which architecture uses each request bit
KVM: Remove unused KVM_REQ_KICK to save a bit in vcpu->requests
kvm: x86: Check kvm_write_guest return value in kvm_write_wall_clock
KVM: s390: implement the RI support of guest
kvm/s390: drop unpaired smp_mb
kvm: x86: fix comment about {mmu,nested_mmu}.gva_to_gpa
KVM: x86: MMU: Use clear_page() instead of init_shadow_page_table()
arm/arm64: KVM: Detect vGIC presence at runtime
...
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from David Vrabel:
"Xen features and fixes for 4.5-rc0:
- Stolen ticks and PV wallclock support for arm/arm64
- Add grant copy ioctl to gntdev device"
* tag 'for-linus-4.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/gntdev: add ioctl for grant copy
x86/xen: don't reset vcpu_info on a cancelled suspend
xen/gntdev: constify mmu_notifier_ops structures
xen/grant-table: constify gnttab_ops structure
xen/time: use READ_ONCE
xen/x86: convert remaining timespec to timespec64 in xen_pvclock_gtod_notify
xen/x86: support XENPF_settime64
xen/arm: set the system time in Xen via the XENPF_settime64 hypercall
xen/arm: introduce xen_read_wallclock
arm: extend pvclock_wall_clock with sec_hi
xen: introduce XENPF_settime64
xen/arm: introduce HYPERVISOR_platform_op on arm and arm64
xen: rename dom0_op to platform_op
xen/arm: account for stolen ticks
arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops
arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops
missing include asm/paravirt.h in cputime.c
xen: move xen_setup_runstate_info and get_runstate_snapshot to drivers/xen/time.c
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Pull ARM updates from Russell King:
- UEFI boot and runtime services support for ARM from Ard Biesheuvel
and Roy Franz.
- DT compatibility with old atags booting protocol for Nokia N900
devices from Ivaylo Dimitrov.
- PSCI firmware interface using new arm-smc calling convention from
Jens Wiklander.
- Runtime patching for udiv/sdiv instructions for ARMv7 CPUs that
support these instructions from Nicolas Pitre.
- L2x0 cache updates from Dirk B and Linus Walleij.
- Randconfig fixes from Arnd Bergmann.
- ARMv7M (nommu) updates from Ezequiel Garcia
* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (34 commits)
ARM: 8481/2: drivers: psci: replace psci firmware calls
ARM: 8480/2: arm64: add implementation for arm-smccc
ARM: 8479/2: add implementation for arm-smccc
ARM: 8478/2: arm/arm64: add arm-smccc
ARM: 8494/1: mm: Enable PXN when running non-LPAE kernel on LPAE processor
ARM: 8496/1: OMAP: RX51: save ATAGS data in the early boot stage
ARM: 8495/1: ATAGS: move save_atags() to arch/arm/include/asm/setup.h
ARM: 8452/3: PJ4: make coprocessor access sequences buildable in Thumb2 mode
ARM: 8482/1: l2x0: make it possible to disable outer sync from DT
ARM: 8488/1: Make IPI_CPU_BACKTRACE a "non-secure" SGI
ARM: 8487/1: Remove IPI_CALL_FUNC_SINGLE
ARM: 8485/1: cpuidle: remove cpu parameter from the cpuidle_ops suspend hook
ARM: 8484/1: Documentation: l2c2x0: Mention separate controllers explicitly
ARM: 8483/1: Documentation: l2c: Rename l2cc to l2c2x0
ARM: 8477/1: runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()
ARM: 8476/1: VDSO: use PTR_ERR_OR_ZERO for vma check
ARM: 8453/2: proc-v7.S: don't locate temporary stack space in .text section
ARM: add UEFI stub support
ARM: wire up UEFI init and runtime support
ARM: only consider memblocks with NOMAP cleared for linear mapping
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm[64] perf updates from Will Deacon:
"In the past, I have funnelled perf updates through the respective
architecture trees, but now that the arm/arm64 perf driver has been
largely consolidated under drivers/perf/, it makes more sense to send
a separate pull, particularly as I'm listed as maintainer for all the
files involved. I offered the branch to arm-soc, but Arnd suggested
that I just send it to you directly.
So, here is the arm/arm64 perf queue for 4.5. The main features are
described below, but the most useful change is from Drew, which
advertises our architected event mapping in sysfs so that the perf
tool is a lot more user friendly and no longer requires the use of
magic hex constants for profiling common events.
- Support for the CPU PMU in Cortex-A72
- Add sysfs entries to describe the architected events and their
mappings for PMUv{1-3}"
* tag 'arm64-perf' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: perf: add support for Cortex-A72
arm64: perf: add format entry to describe event -> config mapping
ARM: perf: add format entry to describe event -> config mapping
arm64: kernel: enforce pmuserenr_el0 initialization and restore
arm64: perf: Correct Cortex-A53/A57 compatible values
arm64: perf: Add event descriptions
arm64: perf: Convert event enums to #defines
arm: perf: Add event descriptions
arm: perf: Convert event enums to #defines
drivers/perf: kill armpmu_register
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"Here is the core arm64 queue for 4.5. As you might expect, the
Christmas break resulted in a number of patches not making the final
cut, so 4.6 is likely to be larger than usual. There's still some
useful stuff here, however, and it's detailed below.
The EFI changes have been Reviewed-by Matt and the memblock change got
an "OK" from akpm.
Summary:
- Support for a separate IRQ stack, although we haven't reduced the
size of our thread stack just yet since we don't have enough data
to determine a safe value
- Refactoring of our EFI initialisation and runtime code into
drivers/firmware/efi/ so that it can be reused by arch/arm/.
- Ftrace improvements when unwinding in the function graph tracer
- Document our silicon errata handling process
- Cache flushing optimisation when mapping executable pages
- Support for hugetlb mappings using the contiguous hint in the pte"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (45 commits)
arm64: head.S: use memset to clear BSS
efi: stub: define DISABLE_BRANCH_PROFILING for all architectures
arm64: entry: remove pointless SPSR mode check
arm64: mm: move pgd_cache initialisation to pgtable_cache_init
arm64: module: avoid undefined shift behavior in reloc_data()
arm64: module: fix relocation of movz instruction with negative immediate
arm64: traps: address fallout from printk -> pr_* conversion
arm64: ftrace: fix a stack tracer's output under function graph tracer
arm64: pass a task parameter to unwind_frame()
arm64: ftrace: modify a stack frame in a safe way
arm64: remove irq_count and do_softirq_own_stack()
arm64: hugetlb: add support for PTE contiguous bit
arm64: Use PoU cache instr for I/D coherency
arm64: Defer dcache flush in __cpu_copy_user_page
arm64: reduce stack use in irq_handler
arm64: mm: ensure that the zero page is visible to the page table walker
arm64: Documentation: add list of software workarounds for errata
arm64: mm: place __cpu_setup in .text
arm64: cmpxchg: Don't incldue linux/mmdebug.h
arm64: mm: fold alternatives into .init
...
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This defines __smp_xxx barriers for arm64,
for use by virtualization.
smp_xxx barriers are removed as they are
defined correctly by asm-generic/barriers.h
Note: arm64 does not support !SMP config,
so smp_xxx and __smp_xxx are always equivalent.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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On arm64 nop, read_barrier_depends, smp_read_barrier_depends
smp_store_mb(), smp_mb__before_atomic and smp_mb__after_atomic match the
asm-generic variants exactly. Drop the local definitions and pull in
asm-generic/barrier.h instead.
This is in preparation to refactoring this code area.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into late/tegra
ARM: tegra: Devicetree changes for v4.5-rc1
This adds support for the Tegra132 Norrin and various Tegra210-based
reference designs. There is also an initial device tree for the Jetson
TX1 development kit.
* tag 'tegra-for-4.5-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
arm64: tegra: Add NVIDIA Jetson TX1 Developer Kit support
arm64: tegra: Add NVIDIA P2597 I/O board support
arm64: tegra: Add NVIDIA Jetson TX1 support
arm64: tegra: Add NVIDIA P2571 board support
arm64: tegra: Add NVIDIA P2371 board support
arm64: tegra: Add NVIDIA P2595 I/O board support
arm64: tegra: Add NVIDIA P2530 main board support
arm64: tegra: Add Tegra210 support
arm64: tegra: Add NVIDIA Tegra132 Norrin support
arm64: tegra: Add Tegra132 support
clk: tegra: Add Tegra210 device tree binding
Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into late/tegra
ARM: tegra: Core SoC changes for v4.5-rc1
The big thing here is Tegra210 support, which is really only the Kconfig
symbol. Other than that there's a few miscellaneous fixes.
* tag 'tegra-for-4.5-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
ARM: tegra: select USB_ULPI from EHCI rather than platform
ARM: tegra: Ensure entire dcache is flushed on entering LP0/1
amba: Hide TEGRA_AHB symbol
soc/tegra: Add Tegra210 support
soc/tegra: Provide per-SoC Kconfig symbols
Signed-off-by: Olof Johansson <olof@lixom.net>
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Let all the archs that implement devmem_is_allowed() opt-in to a common
definition of CONFIG_STRICT_DEVM in lib/Kconfig.debug.
Cc: Kees Cook <keescook@chromium.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
[heiko: drop 'default y' for s390]
Acked-by: Ingo Molnar <mingo@redhat.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Currently we use an open-coded memzero to clear the BSS. As it is a
trivial implementation, it is sub-optimal.
Our optimised memset doesn't use the stack, is position-independent, and
for the memzero case can use of DC ZVA to clear large blocks
efficiently. In __mmap_switched the MMU is on and there are no live
caller-saved registers, so we can safely call an uninstrumented memset.
This patch changes __mmap_switched to use memset when clearing the BSS.
We use the __pi_memset alias so as to avoid any instrumentation in all
kernel configurations.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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In work_pending, we may skip work if the stacked SPSR value represents
anything other than an EL0 context. We then immediately invoke the
kernel_exit 0 macro as part of ret_to_user, assuming a return to EL0.
This is somewhat confusing.
We use work_pending as part of the ret_to_user/ret_fast_syscall state
machine. We only use ret_fast_syscall in the return from an SVC issued
from EL0. We use ret_to_user for return from EL0 exception handlers and
also for return from ret_from_fork in the case the task was not a kernel
thread (i.e. it is a user task).
Thus in all cases the stacked SPSR value must represent an EL0 context,
and the check is redundant. This patch removes it, along with the now
unused no_work_pending label.
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Initialising the suppport for EFI runtime services requires us to
allocate a pgd off the back of an early_initcall. On systems where the
PGD_SIZE is smaller than PAGE_SIZE (e.g. 64k pages and 48-bit VA), the
pgd_cache isn't initialised at this stage, and we panic with a NULL
dereference during boot:
Unable to handle kernel NULL pointer dereference at virtual address 00000000
__create_mapping.isra.5+0x84/0x350
create_pgd_mapping+0x20/0x28
efi_create_mapping+0x5c/0x6c
arm_enable_runtime_services+0x154/0x1e4
do_one_initcall+0x8c/0x190
kernel_init_freeable+0x84/0x1ec
kernel_init+0x10/0xe0
ret_from_fork+0x10/0x50
This patch fixes the problem by initialising the pgd_cache earlier, in
the pgtable_cache_init callback, which sounds suspiciously like what it
was intended for.
Reported-by: Dennis Chen <dennis.chen@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Compilers may engage the improbability drive when encountering shifts
by a distance that is a multiple of the size of the operand type. Since
the required bounds check is very simple here, we can get rid of all the
fuzzy masking, shifting and comparing, and use the documented bounds
directly.
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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The test whether a movz instruction with a signed immediate should be
turned into a movn instruction (i.e., when the immediate is negative)
is flawed, since the value of imm is always positive. Also, the
subsequent bounds check is incorrect since the limit update never
executes, due to the fact that the imm_type comparison will always be
false for negative signed immediates.
Let's fix this by performing the sign test on sval directly, and
replacing the bounds check with a simple comparison against U16_MAX.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[will: tidied up use of sval, renamed MOVK enum value to MOVKZ]
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Switch to use a generic interface for issuing SMC/HVC based on ARM SMC
Calling Convention. Removes now the now unused psci-call.S.
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.linaro.org/people/ard.biesheuvel/linux-arm into devel-stable
This implements UEFI kernel support for 32-bit ARM, based on the existing
arm64 support and existing generic early ioremap support. It is based on
commit f7d924894265 ("arm64/efi: refactor EFI init and runtime code for
reuse by 32-bit ARM"), which was pulled from the arm64 repo [1] as branch
'aarch64/efi'
[1] git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
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https://github.com/AppliedMicro/xgene-next into next/dt64
Merge "Fixes for X-Gene DTS for v4.5" from Duc Dang:
This patch set fixes the node names of X-Gene I2C, GPIO
controller DT nodes; and also removes I2C clock nodes as
the same clock is shared between 2 I2C controllers
on X-Gene SoC.
* tag 'xgene-dts-fixes-for-v4.5' of https://github.com/AppliedMicro/xgene-next:
arm64: dts: X-Gene v2: I2C1 clock is always on
arm64: dts: X-Gene v1: I2C0 clock is always on
arm64: dts: Fix to use standard DT node names for X-Gene 1 and X-Gene 2 platforms
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