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The commit 82ea7d411d43 ("arm64: dts: qcom: sc7180: Base dynamic CPU
power coefficients in reality") and the commit be0416a3f917 ("arm64:
dts: qcom: Add sc7180-trogdor-homestar") passed each other in the
tubes that make up the Internet. Despite the fact the patches didn't
cause a merge conflict, they need to account for each other. Do that.
Fixes: 82ea7d411d43 ("arm64: dts: qcom: sc7180: Base dynamic CPU power coefficients in reality")
Fixes: be0416a3f917 ("arm64: dts: qcom: Add sc7180-trogdor-homestar")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210923081352.1.I2a2ee0ac428a63927324d65022929565aa7d8361@changeid
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All smartphones of this platform are equipped with a WCD9335 audio
codec, getting its MCLK from PM8998 gpio13: add this clock to DT.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-7-angelogioacchino.delregno@somainline.org
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All of the machines of the Sony Yoshino platform are equipped with
two cameras, sharing the same regulators configuration.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-6-angelogioacchino.delregno@somainline.org
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Add configuration for the LAB and IBB regulators (in boost mode):
this platform has smartphones with three different display sizes,
hence different displays requiring different voltage.
The common configuration parameters have been put in the common
device-tree, while specific voltage specs and soft-start-us are
variant specific, so they have been put into the machine specific
dts file.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-5-angelogioacchino.delregno@somainline.org
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All smartphones in the Sony Yoshino platforms have got a simple
vibrator hooked to a GPIO: add support for that and add its own
pin configuration.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-4-angelogioacchino.delregno@somainline.org
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This platform uses the WCN3990 Bluetooth chip, reachable on UART-3.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-3-angelogioacchino.delregno@somainline.org
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All of the devices in the Sony Yoshino platform are using a Synaptics
RMI4-compatible touch IC with identical pins and supplies: enable the
I2C-5 bus and add the rmi4-i2c node along with the required pin
configurations.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-2-angelogioacchino.delregno@somainline.org
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This commit introduces support for the Sony Yoshino platform, using
the MSM8998 SoC, including:
- Sony Xperia XZ1 (codename Poplar),
- Sony Xperia XZ1 Compact (codename Lilac),
- Sony Xperia XZ Premium (codename Maple).
All of the three aforementioned smartphones are sharing a 99%
equal board configuration, with very small differences between
each other, which is the reason for the introduction of a common
msm8998-sony-xperia-yoshino DT.
This base configuration includes regulators and project-wide pin
configurations and it's made to boot to a serial console.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-1-angelogioacchino.delregno@somainline.org
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If X2TLB=y (CPU_SHX2=y or CPU_SHX3=y, e.g. migor_defconfig), pgd_t.pgd
is "unsigned long long", causing:
In file included from arch/sh/include/asm/pgtable.h:13,
from include/linux/pgtable.h:6,
from include/linux/mm.h:33,
from arch/sh/kernel/asm-offsets.c:14:
arch/sh/include/asm/pgtable-3level.h: In function `pud_pgtable':
arch/sh/include/asm/pgtable-3level.h:37:9: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
37 | return (pmd_t *)pud_val(pud);
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Fix this by adding an intermediate cast to "unsigned long", which is
basically what the old code did before.
Link: https://lkml.kernel.org/r/2c2eef3c9a2f57e5609100a4864715ccf253d30f.1631713483.git.geert+renesas@glider.be
Fixes: 9cf6fa2458443118 ("mm: rename pud_page_vaddr to pud_pgtable and make it return pmd_t *")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Daniel Palmer <daniel@thingy.jp>
Acked-by: Rob Landley <rob@landley.net>
Cc: Yoshinori Sato <ysato@users.osdn.me>
Cc: Rich Felker <dalias@libc.org>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It turns out that the pm660 PON is a GEN2 device. Update the compatible
to "qcom,pm8998-pon" and add reboot mode support, so that devices can be
rebooted into bootloader and recovery mode. Tested on Xiaomi Redmi Note
7 phone.
While at it, drop the unnecessary newline between 'compatible' and 'reg'
property.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210824021918.17271-1-shawn.guo@linaro.org
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Add aliases for i2c and spi for sc7280 soc.
Signed-off-by: Rajesh Patil <rajpat@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1632399378-12229-9-git-send-email-rajpat@codeaurora.org
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Add QUPv3 wrapper_1 DT nodes for SC7280 SoC.
Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
Signed-off-by: Rajesh Patil <rajpat@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1632399378-12229-8-git-send-email-rajpat@codeaurora.org
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Add bluetooth uart pin configuration for sc7280-idp.
Signed-off-by: Rajesh Patil <rajpat@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1632399378-12229-7-git-send-email-rajpat@codeaurora.org
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Uart5 is treated as dedicated debug uart.Change the
compatible as "qcom,geni-uart" in SoC DT to make it generic
and later update it as "qcom,geni-debug-uart" in sc7280-idp
Add interconnects and power-domains. Split the pinctrl
functions and correct the gpio pins.
Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
Signed-off-by: Rajesh Patil <rajpat@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1632399378-12229-6-git-send-email-rajpat@codeaurora.org
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Add QUPv3 wrapper_0 DT nodes for SC7280 SoC.
Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
Signed-off-by: Rajesh Patil <rajpat@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1632399378-12229-5-git-send-email-rajpat@codeaurora.org
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Add spi-nor flash node and pinctrl configurations for the SC7280 IDP.
Signed-off-by: Rajesh Patil <rajpat@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1632399378-12229-4-git-send-email-rajpat@codeaurora.org
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Add QSPI DT node and qspi_opp_table for SC7280 SoC.
Move qspi_opp_table to / because SPI nodes assume
any child node is a spi device and so we can't put the
table underneath the spi controller.
Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
Signed-off-by: Rajesh Patil <rajpat@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1632399378-12229-3-git-send-email-rajpat@codeaurora.org
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Pull ACPI fix from Rafael Wysocki:
"Revert a recent commit related to memory management that turned out to
be problematic (Jia He)"
* tag 'acpi-5.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "ACPI: Add memory semantics to acpi_os_map_memory()"
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Pull arm64 fixes from Catalin Marinas:
- It turns out that the optimised string routines merged in 5.14 are
not safe with in-kernel MTE (KASAN_HW_TAGS) because of reading beyond
the end of a string (strcmp, strncmp). Such reading may go across a
16 byte tag granule and cause a tag check fault. When KASAN_HW_TAGS
is enabled, use the generic strcmp/strncmp C implementation.
- An errata workaround for ThunderX relied on the CPU capabilities
being enabled in a specific order. This disappeared with the
automatic generation of the cpucaps.h file (sorted alphabetically).
Fix it by checking the current CPU only rather than the system-wide
capability.
- Add system_supports_mte() checks on the kernel entry/exit path and
thread switching to avoid unnecessary barriers and function calls on
systems where MTE is not supported.
- kselftests: skip arm64 tests if the required features are missing.
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Restore forced disabling of KPTI on ThunderX
kselftest/arm64: signal: Skip tests if required features are missing
arm64: Mitigate MTE issues with str{n}cmp()
arm64: add MTE supported check to thread switching and syscall entry/exit
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It adds the missing a2noc clocks required for QoS registers programming
per downstream kernel[1].
[1] https://source.codeaurora.org/quic/la/kernel/msm-4.4/tree/arch/arm/boot/dts/qcom/sdm660-bus.dtsi?h=LA.UM.8.2.r1-04800-sdm660.0#n43
Fixes: 045547a02252 ("arm64: dts: qcom: sdm630: Add interconnect provider nodes")
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Georgi Djakov <djakov@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210824043435.23190-4-shawn.guo@linaro.org
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Inspired by commit b8928c2b5dba ("arm64: tegra: Consolidate audio card
names"). Based on this update HDA card name on Jetson TX2 NX platform.
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Enable support for audio-graph based sound card on Jetson TX2 NX.
Following I/O interfaces are enabled.
* I2S1 and I2S3
* DMIC1 and DMIC2
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Enable powerkey and resin nodes to let the board handle POWER and
Volume- keys properly.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210916151341.1797512-3-dmitry.baryshkov@linaro.org
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Specify recovery and bootloader magic values to be programmed by the
qcom-pon driver. This allows the bootloader to handle
reboot-to-bootloader functionality.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210916151341.1797512-2-dmitry.baryshkov@linaro.org
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Change pm8150 to use the qcom,pm8998-pon compatible string for the pon
in order to pass reboot mode properly.
Fixes: 5101f22a5c37 ("arm64: dts: qcom: pm8150: Add base dts file")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210916151341.1797512-1-dmitry.baryshkov@linaro.org
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Tegra194 supports 8 entries per GPIO controller. This change adds the
missing interrupt entires for all GPIO controllers.
Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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SERIAL_CORE_CONSOLE depends on TTY so EARLY_PRINTK should also
depend on TTY so that it does not select SERIAL_CORE_CONSOLE
inadvertently.
WARNING: unmet direct dependencies detected for SERIAL_CORE_CONSOLE
Depends on [n]: TTY [=n] && HAS_IOMEM [=y]
Selected by [y]:
- EARLY_PRINTK [=y]
Fixes: e8bf5bc776ed ("nios2: add early printk support")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
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Enable sound driver support for Renesas RZ/G2L based platforms.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20210920093905.10878-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Enable DMAC driver support for Renesas RZ/G2L based platforms.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20210920093605.8906-1-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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For better build and test coverage.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20210915153143.25184-1-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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RZ/G2L SoC supports USBPHY control,so enable it in ARM64 defconfig.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210812151808.7916-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Enable RIIC driver support for Renesas RZ/G2L based platforms.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210611165624.30749-6-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Enable CANFD on RZ/G2L SMARC platform.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20210924102338.11595-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Enable the ADC which is present on RZ/G2L SMARC SOM.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20210922212049.19851-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Move extal and memory nodes to SOM DTSI.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20210922212049.19851-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Add support for SW47, SW48 and SW49 via "gpio-keys" on the R-Car V3U
Falcon board.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Link: https://lore.kernel.org/r/20210922201314.3205674-1-kieran.bingham@ideasonboard.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Add audio routing for Mic with bias to reduce noise when doing
audio capture.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210921084605.16250-5-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Enable audio on RZ/G2L SMARC EVK by linking SSI0 with WM8978
audio CODEC.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210921084605.16250-4-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Add WM8978 sound codec node to RZ/G2L SMARC EVK.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210921084605.16250-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Add dmac phandles to SSI nodes to support DMA operation.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210921084605.16250-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Enable I2C{0,1,3} support on RZ/G2L SMARC EVK.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210920182955.13445-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Enable USB2.0 Host/Device support on RZ/G2L SMARC EVK.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210920182955.13445-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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This code works, but it is cleaner to use a semicolon at the end of a
statement instead of a comma.
Extracted from a big anonymous patch by Julia Lawall
<julia.lawall@inria.fr>.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20210914073155.3883532-1-geert@linux-m68k.org
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Add a m68k-only set_fc helper to set the SFC and DFC registers for the
few places that need to override it for special MM operations, but
disconnect that from the deprecated kernel-wide set_fs() API.
Note that the SFC/DFC registers are context switched, so there is no need
to disable preemption.
Partially based on an earlier patch from
Linus Torvalds <torvalds@linux-foundation.org>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-7-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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Allow non-faulting access to kernel addresses without overriding the
address space. Implemented by passing the instruction name to the
low-level assembly macros as an argument, and force the use of the
normal move instructions for kernel access.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-6-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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Add new helpers for doing the grunt work of the 8-byte {get,put}_user
routines to allow for better reuse.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-5-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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Simplify the handling a bit by using the common helper instead of
referencing undefined symbols.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-4-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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The 030 case in virt_to_phys_slow can't ever be reached, so remove it.
Suggested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-3-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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Document that access_ok is completely broken for coldfire and friends at
the moment.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-2-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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sigreturn has to deal with an unpleasant problem - exception stack frames
have different sizes, depending upon the exception (and processor model, as
well) and variable-sized part of exception frame may contain information
needed for instruction restart. So when signal handler terminates and calls
sigreturn to resume the execution at the place where we'd been when we caught
the signal, it has to rearrange the frame at the bottom of kernel stack.
Worse, it might need to open a gap in the kernel stack, shifting pt_regs
towards lower addresses.
Doing that from C is insane - we'd need to shift stack frames (return addresses,
local variables, etc.) of C call chain, right under the nose of compiler and
hope it won't fall apart horribly. What had been actually done is only slightly
less insane - an inline asm in mangle_kernel_stack() moved the stuff around,
then reset stack pointer and jumped to label in asm glue.
However, we can avoid all that mess if the asm wrapper we have to use anyway
would reserve some space on the stack between switch_stack and the C stack
frame of do_{rt_,}sigreturn(). Then C part can simply memmove() pt_regs +
switch_stack, memcpy() the variable part of exception frame into the opened
gap - all of that without inline asm, buggering C call chain, magical jumps
to asm labels, etc.
Asm wrapper would need to know where the moved switch_stack has ended up -
it might have been shifted into the gap we'd reserved before do_rt_sigreturn()
call. That's where it needs to set the stack pointer to. So let the C part
return just that and be done with that.
While we are at it, the call of berr_040cleanup() we need to do when
returning via 68040 bus error exception frame can be moved into C part
as well.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Finn Thain <fthain@linux-m68k.org>
Link: https://lore.kernel.org/r/YP2dTQPm1wGPWFgD@zeniv-ca.linux.org.uk
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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Douglas Anderson
AngeloGioacchino Del Regno
Geert Uytterhoeven
Shawn Guo
Rajesh Patil
Roja Rani Yarubandi
Linus Torvalds
Sameer Pujar
Dmitry Baryshkov
pshete
Randy Dunlap
Biju Das
Wolfram Sang
Lad Prabhakar
Kieran Bingham
Geert Uytterhoeven
Christoph Hellwig
Al Viro