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2021-10-29mailbox: pcc: Drop handling invalid bit-width in {read,write}_registerSudeep Holla
pcc_chan_reg_init now checks if the register bit width is within the list [8, 16, 32, 64] and flags error if that is not the case. Therefore there is no need to handling invalid bit-width in both read_register and write_register. We can drop that along with the return values for these 2 functions. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Avoid accessing PCCT table in pcc_send_data and pcc_mbox_irqSudeep Holla
Now that the con_priv is availvale solely for PCC mailbox controller driver, let us use the same to save the channel specific information in it so that we can it whenever required instead of parsing the PCCT table entries every time in both pcc_send_data and pcc_mbox_irq. We can now use the newly introduces PCC register bundle to simplify both saving of channel specific information and accessing them without repeated checks for the subspace type. Reviewed-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Add PCC register bundle and associated accessor functionsSudeep Holla
Extended PCC subspaces introduces more registers into the PCCT. In order to consolidate access to these registers and to keep all the details contained in one place, let us introduce PCC register bundle that holds the ACPI Generic Address Structure as well as the virtual address for the same if it is mapped in the OS. It also contains the various masks used to access the register and the associated read, write and read-modify-write accessors. We can also clean up the initialisations by having a helper function for the same. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Rename doorbell ack to platform interrupt ack registerSudeep Holla
The specification refers this register and associated bitmask as platform interrupt acknowledge register. Let us rename it so that it is easier to map and understand. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Use PCC mailbox channel pointer instead of standardSudeep Holla
Now that we have all the shared memory region information populated in the pcc_mbox_chan, let us propagate the pointer to the same as the return value to pcc_mbox_request channel. This eliminates the need for the individual users of PCC mailbox to parse the PCCT subspace entries and fetch the shmem information. This also eliminates the need for PCC mailbox controller to set con_priv to PCCT subspace entries. This is required as con_priv is private to the controller driver to attach private data associated with the channel and not meant to be used by the mailbox client/users. Let us convert all the users of pcc_mbox_{request,free}_channel to use new interface. Cc: Jean Delvare <jdelvare@suse.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Wolfram Sang <wsa@kernel.org> Acked-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Add pcc_mbox_chan structure to hold shared memory region infoSudeep Holla
Currently PCC mailbox controller sets con_priv in each channel to hold the pointer to pcct subspace entry it corresponds to. The mailbox user will then fetch this pointer from the channel descriptor they get when they request for the channel. Using that pointer they then parse the pcct entry again to fetch all the information about shared memory region. In order to remove individual users of PCC mailbox parsing the PCCT subspace entries to fetch same information, let us consolidate the same in pcc mailbox controller by parsing all the shared memory region information into a structure that can also hold the mbox_chan pointer it represent. This can then be used as main PCC mailbox channel pointer that we can return as part of pcc_mbox_request_channel instead of standard mailbox channel pointer. Reviewed-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Consolidate subspace doorbell register parsingSudeep Holla
Extended PCC subspaces(Type 3 and 4) differ from generic(Type 0) and HW-Reduced Communication(Type 1 and 2) subspace structures. However some fields share same offsets and same type of structure can be use to extract the fields. In order to simplify that, let us move all the doorbell register parsing into pcc_parse_subspace_db_reg and consolidate there. It will be easier to extend it if required within the same. Reviewed-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Consolidate subspace interrupt information parsingSudeep Holla
Extended PCC subspaces(Type 3 and 4) differ from generic(Type 0) and HW-Reduced Communication(Type 1 and 2) subspace structures. However some fields share same offsets and same type of structure can be use to extract the fields. In order to simplify that, let us move all the IRQ related information parsing into pcc_parse_subspace_irq and consolidate there. It will be easier to extend it if required within the same. Reviewed-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Refactor all PCC channel information into a structureSudeep Holla
Currently all the PCC channel specific information are stored/maintained in global individual arrays for each of those information. It is not scalable and not clean if we have to stash more channel specific information. Couple of reasons to stash more information are to extend the support to Type 3/4 PCCT subspace and also to avoid accessing the PCCT table entries themselves each time we need the information. This patch moves all those PCC channel specific information into a separate structure pcc_chan_info. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: pcc: Fix kernel doc warningsSudeep Holla
Kernel doc validation script is unhappy and complains with the below set of warnings. | drivers/mailbox/pcc.c:179: warning: Function parameter or member 'irq' | not described in 'pcc_mbox_irq' | drivers/mailbox/pcc.c:179: warning: Function parameter or member 'p' | not described in 'pcc_mbox_irq' | drivers/mailbox/pcc.c:378: warning: expecting prototype for | parse_pcc_subspaces(). Prototype was for parse_pcc_subspace() instead Fix it. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29mailbox: apple: Add driver for Apple mailboxesSven Peter
Apple SoCs such as the M1 come with various co-processors. Mailboxes are used to communicate with those. This driver adds support for two variants of those mailboxes. Signed-off-by: Sven Peter <sven@svenpeter.dev> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29dt-bindings: mailbox: Add Apple mailbox bindingsSven Peter
Apple mailbox controller are found on the M1 and are used for communication with various co-processors. Reviewed-by: Mark Kettenis <kettenis@openbsd.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Sven Peter <sven@svenpeter.dev> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-29MAINTAINERS: Add Apple mailbox filesSven Peter
Add Apple mailbox files under the ARM/APPLE MACHINE SUPPORT entry. Signed-off-by: Sven Peter <sven@svenpeter.dev> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-19mailbox: mtk-cmdq: Fix local clock ID usageFei Shao
In the probe function, the clock IDs were pointed to local variables which should only be used in the same code block, and any access to them after the probing stage becomes an use-after-free case. Since there are only limited variants of the gce clock names so far, we can just declare them as static constants to fix the issue. Fixes: 85dfdbfc13ea ("mailbox: cmdq: add multi-gce clocks support for mt8195") Signed-off-by: Fei Shao <fshao@chromium.org> Reviewed-by: Tzung-Bi Shih <tzungbi@google.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-19mailbox: mtk-cmdq: Validate alias_id on probeFei Shao
of_alias_get_id() may return -ENODEV which leads to illegal access to the cmdq->clocks array. Adding a check over alias_id to prevent the unexpected behavior. Fixes: 85dfdbfc13ea ("mailbox: cmdq: add multi-gce clocks support for mt8195") Signed-off-by: Fei Shao <fshao@chromium.org> Reviewed-by: Tzung-Bi Shih <tzungbi@google.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: Remove WARN_ON for async_cb.cb in cmdq_exec_donejason-jh.lin
Because mtk_drm_crtc_update_config is not using cmdq_pkt_flush_async, it won't have pkt->async_cb.cb anymore. So remove the WARN_ON check of pkt->async_cb.cb at cmdq_exec_done. Fixes: 1b6b0ce2240e ("mailbox: mtk-cmdq: Use mailbox rx_callback") Signed-off-by: jason-jh.lin <jason-jh.lin@mediatek.com> Reviewed-by: Chun-Kuang Hu <chunkuang.hu@kernel.org> Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16MAINTAINERS: Update Mun Yew Tham as Altera Mailbox Driver maintainerMun Yew Tham
Update Altera Mailbox Driver maintainer's email from <joyce.ooi@intel.com> to <mun.yew.tham@intel.com> Signed-off-by: Mun Yew Tham <mun.yew.tham@intel.com> Acked-by: Joyce Ooi <joyce.ooi@intel.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16dt-bindings: mailbox: Update maintainer email for qcom apcs-kpssShawn Guo
Sivaprakash's codeaurora.org email address bounces. Before he comes back with his new email, fill Jassi's address in there. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: qcom-apcs-ipc: Add QCM2290 APCS IPC supportShawn Guo
Enable QCM2290 APCS IPC support by adding the compatible. It reuses msm8994_apcs_data. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16dt-bindings: mailbox: qcom: Add QCM2290 APCS compatibleShawn Guo
Add compatible for the Qualcomm QCM2290 APCS block. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: qcom-apcs-ipc: Consolidate msm8994 type apcs_dataShawn Guo
The msm8994 type of apcs_data is defined multiple times with different SoC name encoded. Consolidate them on msm8994 and remove the data duplication. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: xgene-slimpro: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: sun6i: Make use of the helper function devm_platform_ioremap_resource()Cai Huoqing
Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: stm32-ipcc: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: sti: Make use of the helper function devm_platform_ioremap_resource()Cai Huoqing
Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: qcom-apcs-ipc: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: platform-mhu: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: omap: Make use of the helper function devm_platform_ioremap_resource()Cai Huoqing
Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: mtk-cmdq: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: hi6220: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: hi3660: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: bcm2835: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16mailbox: altera: Make use of the helper function ↵Cai Huoqing
devm_platform_ioremap_resource() Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2021-10-16Merge tag 'clk-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux Pull clk driver fixes from Stephen Boyd: "Clk driver fixes for critical issues found in the past few weeks: - Select gdsc config so qcom sm6350 driver probes - Fix a register offset in qcom gcc-sm6115 so the correct clk is controlled - Fix inverted logic in Renesas RZ/G2L .is_enabled() - Mark some more clks critical in Renesas clk driver - Remove a duplicate clk in the agilex driver" * tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: clk: qcom: add select QCOM_GDSC for SM6350 clk: qcom: gcc-sm6115: Fix offset for hlos1_vote_turing_mmu_tbu0_gdsc clk: socfpga: agilex: fix duplicate s2f_user0_clk clk: renesas: rzg2l: Fix clk status function clk: renesas: r9a07g044: Mark IA55_CLK and DMAC_ACLK critical
2021-10-16Merge tag 'for-5.15/dm-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fixes from Mike Snitzer: - Fix DM verity target to skip redundant processing on I/O errors. - Fix request-based DM so that it doesn't queue request to blk-mq when DM device is suspended. - Fix DM core mempool NULL pointer race when completing IO. - Make DM clone target's 'descs' array static. * tag 'for-5.15/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm: fix mempool NULL pointer race when completing IO dm rq: don't queue request to blk-mq during DM suspend dm clone: make array 'descs' static dm verity: skip redundant verity_handle_err() on I/O errors
2021-10-16Merge tag 's390-5.15-6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Vasily Gorbik: - Maintainers and reviewers changes: * Cornelia decided to free up her time and step down from vfio-ccw maintainer and s390 kvm reviewer duties * Add Alexander Gordeev as s390 arch code reviewer - Fix broken strrchr implementation * tag 's390-5.15-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390: add Alexander Gordeev as reviewer s390: fix strrchr() implementation vfio-ccw: step down as maintainer KVM: s390: remove myself as reviewer
2021-10-16Merge tag 'csky-for-linus-5.15-rc6' of git://github.com/c-sky/csky-linuxLinus Torvalds
Pull csky fixes from Guo Ren: "Only 5 fixups: - Make HAVE_TCM depend on !COMPILE_TEST - bitops: Remove duplicate __clear_bit define - Select ARCH_WANT_FRAME_POINTERS only if compiler supports it - Fixup regs.sr broken in ptrace - don't let sigreturn play with priveleged bits of status register" * tag 'csky-for-linus-5.15-rc6' of git://github.com/c-sky/csky-linux: csky: Make HAVE_TCM depend on !COMPILE_TEST csky: bitops: Remove duplicate __clear_bit define csky: Select ARCH_WANT_FRAME_POINTERS only if compiler supports it csky: Fixup regs.sr broken in ptrace csky: don't let sigreturn play with priveleged bits of status register
2021-10-16Merge tag 'arc-5.15-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fix from Vineet Gupta: "Small fixlet for ARC" * tag 'arc-5.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: fix potential build snafu
2021-10-16Merge tag 'arm-soc-fixes-5.15-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC fixes from Arnd Bergmann: "A small number fixes this time, mostly touching actual code: - Add platform device for i.MX System Reset Controller (SRC) to fix a regression caused by fw_devlink change - A fixup for a boot regression caused by my own rework for the Qualcomm SCM driver - Multiple bugfixes for the Arm FFA and optee firmware drivers, addressing problems when they are built as a loadable module - Four dts bugfixes for the Broadcom SoC used in Raspberry pi, addressing VEC (video encoder), MDIO bus controller #address-cells/#size-cells, SDIO voltage and PCIe host bridge dtc warnings" * tag 'arm-soc-fixes-5.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: ARM: imx: register reset controller from a platform driver iommu/arm: fix ARM_SMMU_QCOM compilation ARM: dts: bcm2711-rpi-4-b: Fix usb's unit address ARM: dts: bcm2711-rpi-4-b: Fix pcie0's unit address formatting tee: optee: Fix missing devices unregister during optee_remove ARM: dts: bcm2711-rpi-4-b: fix sd_io_1v8_reg regulator states ARM: dts: bcm2711: fix MDIO #address- and #size-cells ARM: dts: bcm283x: Fix VEC address for BCM2711 firmware: arm_ffa: Fix __ffa_devices_unregister firmware: arm_ffa: Add missing remove callback to ffa_bus_type
2021-10-16Merge tag 'pci-v5.15-fixes-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull pci fix from Bjorn Helgaas: - Don't save msi_populate_sysfs() error code as dev->msi_irq_groups so we don't dereference the error code as a pointer (Wang Hai) * tag 'pci-v5.15-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: PCI/MSI: Handle msi_populate_sysfs() errors correctly
2021-10-16Merge tag 'acpi-5.15-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI fix from Rafael Wysocki: "Add a missing device ID to a quirk list in the suspend-to-idle support code" * tag 'acpi-5.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: PM: Include alternate AMDI0005 id in special behaviour
2021-10-15ARC: fix potential build snafuVineet Gupta
In the big pgtable header split, I inadvertently introduced a couple of duplicate symbols. Fixes: fe6cb7b043b69cd9 ("ARC: mm: disintegrate pgtable.h into levels and flags") Signed-off-by: Vineet Gupta <vgupta@kernel.org>
2021-10-16csky: Make HAVE_TCM depend on !COMPILE_TESTGuenter Roeck
Building csky:allmodconfig results in the following build errors. arch/csky/mm/tcm.c:9:2: error: #error "You should define ITCM_RAM_BASE" 9 | #error "You should define ITCM_RAM_BASE" | ^~~~~ arch/csky/mm/tcm.c:14:2: error: #error "You should define DTCM_RAM_BASE" 14 | #error "You should define DTCM_RAM_BASE" | ^~~~~ arch/csky/mm/tcm.c:18:2: error: #error "You should define correct DTCM_RAM_BASE" 18 | #error "You should define correct DTCM_RAM_BASE" This is seen with compile tests since those enable HAVE_TCM, but do not provide useful default values for ITCM_RAM_BASE or DTCM_RAM_BASE. Disable HAVE_TCM for commpile tests to avoid the error. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guo Ren <guoren@kernel.org>
2021-10-16csky: bitops: Remove duplicate __clear_bit defineGuenter Roeck
Building csky:allmodconfig results in the following build error. In file included from ./include/linux/bitops.h:33, from ./include/linux/log2.h:12, from kernel/bounds.c:13: ./arch/csky/include/asm/bitops.h:77: error: "__clear_bit" redefined Since commit 9248e52fec95 ("locking/atomic: simplify non-atomic wrappers"), __clear_bit is defined in include/asm-generic/bitops/non-atomic.h, and the define in the csky include file is no longer necessary or useful. Remove it. Fixes: 9248e52fec95 ("locking/atomic: simplify non-atomic wrappers") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guo Ren <guoren@kernel.org>
2021-10-16csky: Select ARCH_WANT_FRAME_POINTERS only if compiler supports itGuenter Roeck
Compiling csky:allmodconfig with an upstream C compiler results in the following error. csky-linux-gcc: error: unrecognized command-line option '-mbacktrace'; did you mean '-fbacktrace'? Select ARCH_WANT_FRAME_POINTERS only if gcc supports it to avoid the error. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guo Ren <guoren@kernel.org>
2021-10-16csky: Fixup regs.sr broken in ptraceGuo Ren
gpr_get() return the entire pt_regs (include sr) to userspace, if we don't restore the C bit in gpr_set, it may break the ALU result in that context. So the C flag bit is part of gpr context, that's why riscv totally remove the C bit in the ISA. That makes sr reg clear from userspace to supervisor privilege. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@vger.kernel.org
2021-10-16csky: don't let sigreturn play with priveleged bits of status registerAl Viro
csky restore_sigcontext() blindly overwrites regs->sr with the value it finds in sigcontext. Attacker can store whatever they want in there, which includes things like S-bit. Userland shouldn't be able to set that, or anything other than C flag (bit 0). Do the same thing other architectures with protected bits in flags register do - preserve everything that shouldn't be settable in user mode, picking the rest from the value saved is sigcontext. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Guo Ren <guoren@kernel.org> Cc: stable@vger.kernel.org
2021-10-15Merge tag 'imx-fixes-5.15-3' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes i.MX fixes for 5.15, round 3: - Add platform device for i.MX System Reset Controller (SRC) to fix a regression caused by fw_devlink change. * tag 'imx-fixes-5.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: ARM: imx: register reset controller from a platform driver Link: https://lore.kernel.org/r/20211015070017.GI22881@dragon Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-10-15Merge tag 'gpio-fixes-for-v5.15-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux Pull gpio fixes from Bartosz Golaszewski: - fix module autoloading on gpio-74x164 after a revert of OF modaliases - fix problems with the bias setting in gpio-pca953x - fix a use-after-free bug in gpio-mockup by using software nodes * tag 'gpio-fixes-for-v5.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: gpio: mockup: Convert to use software nodes gpio: pca953x: Improve bias setting gpio: 74x164: Add SPI device ID table
2021-10-15Merge tag 'spi-fix-v5.15-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi fixes from Mark Brown: "A few small fixes. Mostly driver specific but there's one in the core which fixes a deadlock when adding devices on spi-mux that's triggered because spi-mux is a SPI device which is itself a SPI controller and so can instantiate devices when registered. We were using a global lock to protect against reusing chip selects but they're a per controller thing so moving the lock per controller resolves that" * tag 'spi-fix-v5.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: spi-mux: Fix false-positive lockdep splats spi: Fix deadlock when adding SPI controllers on SPI buses spi: bcm-qspi: clear MSPI spifie interrupt during probe spi: spi-nxp-fspi: don't depend on a specific node name erratum workaround spi: mediatek: skip delays if they are 0 spi: atmel: Fix PDC transfer setup bug spi: spidev: Add SPI ID table spi: Use 'flash' node name instead of 'spi-flash' in example
generated by cgit (git 2.34.1) at 2025-07-16 02:42:25 +0000