- Extract clock information from EP108
- Sort GPIO node
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iEYEABECAAYFAlbO/SIACgkQykllyylKDCEL9QCfdcFczSmk3OWvubtp1/d7YoMs
MhoAn33UBIqTGcmYgpRljfhWWStW1eRE
=wlZ0
-----END PGP SIGNATURE-----
Merge tag 'zynqmp-dt-for-4.6' of https://github.com/Xilinx/linux-xlnx into next/dt64
Merge "ARM: Xilinx ZynqMP dt patches for v4.6" from Michal Simek:
- Extract clock information from EP108
- Sort GPIO node
* tag 'zynqmp-dt-for-4.6' of https://github.com/Xilinx/linux-xlnx:
ARM64: zynqmp: Extract clock information from EP108
ARM64: zynqmp: Keep gpio node alphabetically sorted
Device tree part of the Armada 3700 support:
- binding for the Armada 3700 SoCs
- device tree files for the SoCs and a board
- tidy up the Marvell related files
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iEYEABECAAYFAlbEltYACgkQCwYYjhRyO9UZxACgi1NcAIrem831BSMOHVRBphAB
qT8An3bCV/tPx2QYz0kKYmGfyb7VtTzo
=IdEY
-----END PGP SIGNATURE-----
Merge tag 'mvebu-dt64-4.6-1' of git://git.infradead.org/linux-mvebu into next/dt64
mvebu dt64 for 4.6 (part 1)
Device tree part of the Armada 3700 support:
- binding for the Armada 3700 SoCs
- device tree files for the SoCs and a board
- tidy up the Marvell related files
* tag 'mvebu-dt64-4.6-1' of git://git.infradead.org/linux-mvebu:
arm64: dts: add the Marvell Armada 3700 family and a development board
devicetree: bindings: add DT binding for the Marvell Armada 3700 SoC family
Documentation: dt: Tidy up the Marvell related files
Documentation: dt-bindings: Add a new compatible for the Armada 3700
Signed-off-by: Olof Johansson <olof@lixom.net>
This is a fix-up patch based on the review comment from
Arnd regarding:
* fix ccn504 address in the node name
* remove kcs interrupt-name
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
gpio-key,wakeup to the more generic wakeup-source property.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABCAAGBQJWuwVbAAoJEPOmecmc0R2B5b4H/j869d1n99jqv+we15c0B87e
bYjNk9UKW4me+rrpU4PLBVyj15KYj+otAS/aB9S5Z+GckRWHLIB4FppE+cCyqAvb
jmLle+vrMcni23AfbVB9nBzcx/PpE+G0NB9s/PDo07B4MxpeShvYDCW/x3u7ak2r
VotY8hqp3SI7JVXskknmiJtaxA9RI+CpVPucBJ6SZL5CYFgLSYqo0JiW7ArRWoeb
/vdbmMN+9CwbYAaWPzkVgPvCTNqsKJeP3K05u+zxOqV++YIva8H2Ml59euxC3CsY
0IssrCVb0iwlBEF+Lxya/tJJe7lZ5iTcjfE/NMI4lmxvFTUFNMKt8v79kLIKEx0=
=+Sh9
-----END PGP SIGNATURE-----
Merge tag 'v4.6-rockchip-dts64-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into next/dt64
Define the tuning-related mmc clocks and move from
gpio-key,wakeup to the more generic wakeup-source property.
* tag 'v4.6-rockchip-dts64-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
arm64: dts: rockchip: replace gpio-key,wakeup with wakeup-source property
arm64: dts: rockchip: add rk3368 tuning clk for emmc and sdmmc
Signed-off-by: Olof Johansson <olof@lixom.net>
MT8173 E1 chip has one bug that if turn off USB power domain, vcore
power will also be off, thus cause modules using vcore power domain
fail, like MMC. The E1 chip only found on MT8173-evb board and this
board only has E1 chip, so implement this as a board specific
workaround.
Pwrapper use vcore power, so add pwrapper using USB power domain to
keep USB power domain not to zero and disabled.
Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Add initial dtsi files to support Marvell Armada 3700 SoC with Cortex-A53
CPUs. There are two members in this family: the Armada 3710 (Single CPU)
and the Armada 3720 (Dual CPUs).
It also adds a dts file for the Marvell Armada 3720 DB board.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Keyboard driver for GPIO buttons(gpio-keys) checks for the legacy
"gpio-key,wakeup" boolean property to enable gpio buttons as wakeup
source.
Few dts files assign value "1" to gpio-key,wakeup and in one instance a
value "0" is assigned probably assuming it won't be enabled as a wakeup
source. Since the presence of the boolean property indicates it is
enabled, value of "0" have no value.
This patch replaces the legacy "gpio-key,wakeup" with the unified
"wakeup-source" property which inturn fixes the above mentioned issue.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Add device tree file for AMD/Linaro 96Boards Enterprise Edition Server
(Husky) Board. This is based on the AMD Seattle Rev.B0 system
Signed-off-by: Leo Duran <leo.duran@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Add device tree files for AMD Overdrive boards which comes with
AMD Seattle Revision B0 and B1 SOCs.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Add AMD XGBE device tree file, which is available in AMD Seattle RevB.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Add new GPIO device nodes and fix clock on gpio0.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Add new SATA1 device node, and fix the register range size of SATA0.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Add new i2c1 device node, and fix the incorrect clock frequency.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Fix DMA ranges of smb0 and pcie0 nodes in AMD Seattle SOC.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This patch fixes incorrect sizes of the GICv2 device tree node.
This has triggered error message when booting Xen hypervisor.
Signed-off-by: Brijesh Singh <brijeshkumar.singh@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
The first real batch of fixes for this release cycle, so there are a few more
than usual.
Most of these are fixes and tweaks to board support (DT bugfixes, etc). I've
also picked up a couple of small cleanups that seemed innocent enough that
there was little reason to wait (const/__initconst and Kconfig deps).
Quite a bit of the changes on OMAP were due to fixes to no longer write to
rodata from assembly when ARM_KERNMEM_PERMS was enabled, but there were also
other fixes.
Kirkwood had a bunch of gpio fixes for some boards. OMAP had RTC fixes
on OMAP5, and Nomadik had changes to MMC parameters in DT.
All in all, mostly the usual mix of various fixes.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=1iBu
-----END PGP SIGNATURE-----
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"The first real batch of fixes for this release cycle, so there are a
few more than usual.
Most of these are fixes and tweaks to board support (DT bugfixes,
etc). I've also picked up a couple of small cleanups that seemed
innocent enough that there was little reason to wait (const/
__initconst and Kconfig deps).
Quite a bit of the changes on OMAP were due to fixes to no longer
write to rodata from assembly when ARM_KERNMEM_PERMS was enabled, but
there were also other fixes.
Kirkwood had a bunch of gpio fixes for some boards. OMAP had RTC
fixes on OMAP5, and Nomadik had changes to MMC parameters in DT.
All in all, mostly the usual mix of various fixes"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (46 commits)
ARM: multi_v7_defconfig: enable DW_WATCHDOG
ARM: nomadik: fix up SD/MMC DT settings
ARM64: tegra: Add chosen node for tegra132 norrin
ARM: realview: use "depends on" instead of "if" after prompt
ARM: tango: use "depends on" instead of "if" after prompt
ARM: tango: use const and __initconst for smp_operations
ARM: realview: use const and __initconst for smp_operations
bus: uniphier-system-bus: revive tristate prompt
arm64: dts: Add missing DMA Abort interrupt to Juno
bus: vexpress-config: Add missing of_node_put
ARM: dts: am57xx: sbc-am57x: correct Eth PHY settings
ARM: dts: am57xx: cl-som-am57x: fix CPSW EMAC pinmux
ARM: dts: am57xx: sbc-am57x: fix UART3 pinmux
ARM: dts: am57xx: cl-som-am57x: update SPI Flash frequency
ARM: dts: am57xx: cl-som-am57x: set HOST mode for USB2
ARM: dts: am57xx: sbc-am57x: fix SB-SOM EEPROM I2C address
ARM: dts: LogicPD Torpedo: Revert Duplicative Entries
ARM: dts: am437x: pixcir_tangoc: use correct flags for irq types
ARM: dts: am4372: fix irq type for arm twd and global timer
ARM: dts: at91: sama5d4 xplained: fix phy0 IRQ type
...
- Add missing PAN toggling in the futex code
- Fix missing #include that briefly caused issues in -next
- Allow changing of vmalloc permissions with set_memory_* (used by bpf)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABCgAGBQJWs2KkAAoJELescNyEwWM0kn4H+gIGvX7Dk792AJlLj8u1hIb6
m+Z4hgLcNIFZCWEGEEWOjHAJ1n2+SgRPdJgDmhN4KP+5Oh9+Qkqhj3wDy7RB05Bf
q3B/dZzr/rASRpycOyNL4CoyqScS7YsP9+X+7tNC8dAMr8UeYahvVKYVwzMlXfDh
4hh3gZkhBQ/hIUse02VtE+OR6lbZAwMYahrM2T9YHslNKanQkpezqBVD4Ic0J5ic
Jkpep8tBdTBLrFm4WERoO6vv8YCrXDP+6DutAO/nOmvHTr07LgkRwiOn+HmoCxiv
Ir5j01SV2SNlr7AfLBWBLN/NluoRByzmQ6SeEsQ3thN35fIsVndStKcAQAAu1nU=
=pr2h
-----END PGP SIGNATURE-----
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"Nothing particularly interesting here, but all important fixes
nonetheless:
- Add missing PAN toggling in the futex code
- Fix missing #include that briefly caused issues in -next
- Allow changing of vmalloc permissions with set_memory_* (used by
bpf)"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: asm: Explicitly include linux/personality.h in asm/page.h
arm64: futex.h: Add missing PAN toggling
arm64: allow vmalloc regions to be set with set_memory_*
asm/page.h uses READ_IMPLIES_EXEC from linux/personality.h but does not
explicitly include it causing build failures in -next where whatever was
causing it to be implicitly included has changed to remove that
inclusion. Add an explicit inclusion to fix this.
Signed-off-by: Mark Brown <broonie@kernel.org>
[will: moved #include inside #ifndef __ASSEMBLY__ block]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Add and enable the external crystal for the SCIF_CLK and its pinctrl, to
be used by the Baud Rate Generator for External Clock (BRG) on (H)SCIF.
This increases the range and accuracy of supported baud rates:
- SCIF:
- Supports now 50, 230400, 460800, 500000, and 921600 bps,
- Perfect match for standard 50-460800, and 9216000 bps.
- HSCIF:
- Supports now 50, 75, and 110 bps,
- Perfect match for standard 50-460800, and 9216000 bps.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Add the device node for the external SCIF_CLK.
The presence of the SCIF_CLK crystal and its clock frequency depend on
the actual board.
Add the two optional clock sources (S3D1 and SCIF_CLK for the internal
resp. external clock) for the Baud Rate Generator for External Clock
(BRG) to all SCIF and HSCIF device nodes.
This increases the range and accuracy of supported baud rates on
(H)SCIF.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
The clock is really the device functional clock, not the interface
clock. Rename it.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
futex.h's futex_atomic_cmpxchg_inatomic() does not use the
__futex_atomic_op() macro and needs its own PAN toggling. This was missed
when the feature was implemented.
Fixes: 338d4f49d6 ("arm64: kernel: Add support for Privileged Access Never")
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
The range of set_memory_* is currently restricted to the module address
range because of difficulties in breaking down larger block sizes.
vmalloc maps PAGE_SIZE pages so it is safe to use as well. Update the
function ranges and add a comment explaining why the range is restricted
the way it is.
Suggested-by: Laura Abbott <labbott@fedoraproject.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Pull networking fixes from David Miller:
"This looks like a lot but it's a mixture of regression fixes as well
as fixes for longer standing issues.
1) Fix on-channel cancellation in mac80211, from Johannes Berg.
2) Handle CHECKSUM_COMPLETE properly in xt_TCPMSS netfilter xtables
module, from Eric Dumazet.
3) Avoid infinite loop in UDP SO_REUSEPORT logic, also from Eric
Dumazet.
4) Avoid a NULL deref if we try to set SO_REUSEPORT after a socket is
bound, from Craig Gallek.
5) GRO key comparisons don't take lightweight tunnels into account,
from Jesse Gross.
6) Fix struct pid leak via SCM credentials in AF_UNIX, from Eric
Dumazet.
7) We need to set the rtnl_link_ops of ipv6 SIT tunnels before we
register them, otherwise the NEWLINK netlink message is missing
the proper attributes. From Thadeu Lima de Souza Cascardo.
8) Several Spectrum chip bug fixes for mlxsw switch driver, from Ido
Schimmel
9) Handle fragments properly in ipv4 easly socket demux, from Eric
Dumazet.
10) Don't ignore the ifindex key specifier on ipv6 output route
lookups, from Paolo Abeni"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (128 commits)
tcp: avoid cwnd undo after receiving ECN
irda: fix a potential use-after-free in ircomm_param_request
net: tg3: avoid uninitialized variable warning
net: nb8800: avoid uninitialized variable warning
net: vxge: avoid unused function warnings
net: bgmac: clarify CONFIG_BCMA dependency
net: hp100: remove unnecessary #ifdefs
net: davinci_cpdma: use dma_addr_t for DMA address
ipv6/udp: use sticky pktinfo egress ifindex on connect()
ipv6: enforce flowi6_oif usage in ip6_dst_lookup_tail()
netlink: not trim skb for mmaped socket when dump
vxlan: fix a out of bounds access in __vxlan_find_mac
net: dsa: mv88e6xxx: fix port VLAN maps
fib_trie: Fix shift by 32 in fib_table_lookup
net: moxart: use correct accessors for DMA memory
ipv4: ipconfig: avoid unused ic_proto_used symbol
bnxt_en: Fix crash in bnxt_free_tx_skbs() during tx timeout.
bnxt_en: Exclude rx_drop_pkts hw counter from the stack's rx_dropped counter.
bnxt_en: Ring free response from close path should use completion ring
net_sched: drr: check for NULL pointer in drr_dequeue
...
The NVIDIA bootloader, nvtboot, expects the "chosen" node to be present
in the device-tree blob and if it is not then it fails to boot the kernel.
Add the chosen node so we can boot the kernel on Tegra132 Norrin with the
nvtboot bootloader.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
The DMA-330 has an "irq_abort" interrupt line on which it signals faults
separately from the "irq[n:0]" channel interrupts. On Juno, this is
wired up to SPI 92; add it to the DT so that DMAC faults are correctly
reported for the driver to reset the thing, rather than leaving it
locked up and waiting to time out.
CC: Liviu Dudau <liviu.dudau@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
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>
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>
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: df057cc7b4 ("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>
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>
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>
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>
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: 60792ad349 ("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>
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>
Commit e8f3010f73 ("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>
