user/sven/linux.git/drivers/firmware/psci, branch v6.2.7

cpuidle: drivers: firmware: psci: Dont instrument suspend code

2023-03-10T08:29:06Z

[ Upstream commit 393e2ea30aec634b37004d401863428e120d5e1b ] The PSCI suspend code is currently instrumentable, which is not safe as instrumentation (e.g. ftrace) may try to make use of RCU during idle periods when RCU is not watching. To fix this we need to ensure that psci_suspend_finisher() and anything it calls are not instrumented. We can do this fairly simply by marking psci_suspend_finisher() and the psci*_cpu_suspend() functions as noinstr, and the underlying helper functions as __always_inline. When CONFIG_DEBUG_VIRTUAL=y, __pa_symbol() can expand to an out-of-line instrumented function, so we must use __pa_symbol_nodebug() within psci_suspend_finisher(). The raw SMCCC invocation functions are written in assembly, and are not subject to compiler instrumentation. Signed-off-by: Mark Rutland Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20230126151323.349423061@infradead.org Signed-off-by: Sasha Levin

firmware/psci: Don't register with debugfs if PSCI isn't available

2023-01-06T17:13:08Z

Contrary to popular belief, PSCI is not a universal property of an ARM/arm64 system. There is a garden variety of systems out there that don't (or even cannot) implement it. I'm the first one deplore such a situation, but hey... On such systems, a "cat /sys/kernel/debug/psci" results in fireworks, as no invocation callback is registered. Check for the invoke_psci_fn and psci_ops.get_version pointers before registering with the debugfs subsystem, avoiding the issue altogether. Fixes: 3137f2e60098 ("firmware/psci: Add debugfs support to ease debugging") Reported-by: Hector Martin Signed-off-by: Marc Zyngier Cc: Dmitry Baryshkov Cc: Mark Brown Cc: Ulf Hansson Cc: Arnd Bergmann Cc: Mark Rutland Cc: Lorenzo Pieralisi Reviewed-by: Hector Martin Acked-by: Dmitry Baryshkov Acked-by: Mark Rutland Link: https://lore.kernel.org/r/20230105090834.630238-1-maz@kernel.org Signed-off-by: Will Deacon

Merge tag 'arm-drivers-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2022-10-06T18:04:57Z

Pull ARM driver updates from Arnd Bergmann: "The drivers branch for 6.1 is a bit larger than for most releases. Most of the changes come from SoC maintainers for the drivers/soc subsystem: - A new driver for error handling on the NVIDIA Tegra 'control backbone' bus. - A new driver for Qualcomm LLCC/DDR bandwidth measurement - New Rockchip rv1126 and rk3588 power domain drivers - DT binding updates for memory controllers, older Rockchip SoCs, various Mediatek devices, Qualcomm SCM firmware - Minor updates to Hisilicon LPC bus, the Allwinner SRAM driver, the Apple rtkit firmware driver, Tegra firmware - Minor updates for SoC drivers (Samsung, Mediatek, Renesas, Tegra, Qualcomm, Broadcom, NXP, ...) There are also some separate subsystem with downstream maintainers that merge updates this way: - Various updates and new drivers in the memory controller subsystem for Mediatek and Broadcom SoCs - Small set of changes in preparation to add support for FF-A v1.1 specification later, in the Arm FF-A firmware subsystem - debugfs support in the PSCI firmware subsystem" * tag 'arm-drivers-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (149 commits) ARM: remove check for CONFIG_DEBUG_LL_SER3 firmware/psci: Add debugfs support to ease debugging firmware/psci: Print a warning if PSCI doesn't accept PC mode dt-bindings: memory: snps,dw-umctl2-ddrc: Extend schema with IRQs/resets/clocks props dt-bindings: memory: snps,dw-umctl2-ddrc: Replace opencoded numbers with macros dt-bindings: memory: snps,dw-umctl2-ddrc: Use more descriptive device name dt-bindings: memory: synopsys,ddrc-ecc: Detach Zynq DDRC controller support soc: sunxi: sram: Add support for the D1 system control soc: sunxi: sram: Export the LDO control register soc: sunxi: sram: Save a pointer to the OF match data soc: sunxi: sram: Return void from the release function soc: apple: rtkit: Add apple_rtkit_poll soc: imx: add i.MX93 media blk ctrl driver soc: imx: add i.MX93 SRC power domain driver soc: imx: imx8m-blk-ctrl: Use genpd_xlate_onecell soc: imx: imx8mp-blk-ctrl: handle PCIe PHY resets soc: imx: imx8m-blk-ctrl: add i.MX8MP VPU blk ctrl soc: imx: add i.MX8MP HDMI blk ctrl HDCP/HRV_MWR soc: imx: add icc paths for i.MX8MP hsio/hdmi blk ctrl soc: imx: add icc paths for i.MX8MP media blk ctrl ...

firmware/psci: Add debugfs support to ease debugging

2022-09-28T20:38:07Z

To ease debugging of PSCI supported features, add debugfs file called 'psci' describing PSCI and SMC CC versions, enabled features and options. Signed-off-by: Dmitry Baryshkov Reviewed-by: Mark Brown Reviewed-by: Ulf Hansson Link: https://lore.kernel.org/r/20220926110758.666922-1-dmitry.baryshkov@linaro.org' Signed-off-by: Arnd Bergmann

firmware/psci: Print a warning if PSCI doesn't accept PC mode

2022-09-28T20:37:55Z

The function psci_pd_try_set_osi_mode() will print an error if enabling OSI mode fails. To ease debugging PSCI issues print corresponding message if switching to PC mode fails too. Signed-off-by: Dmitry Baryshkov Reviewed-by: Sudeep Holla Reviewed-by: Ulf Hansson Acked-by: Mark Rutland Link: https://lore.kernel.org/r/20220926110249.666813-1-dmitry.baryshkov@linaro.org' Signed-off-by: Arnd Bergmann

treewide: Drop function_nocfi

2022-09-26T17:13:14Z

With -fsanitize=kcfi, we no longer need function_nocfi() as the compiler won't change function references to point to a jump table. Remove all implementations and uses of the macro. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Tested-by: Kees Cook Tested-by: Nathan Chancellor Acked-by: Peter Zijlstra (Intel) Tested-by: Peter Zijlstra (Intel) Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20220908215504.3686827-14-samitolvanen@google.com

psci: Fix the function type for psci_initcall_t

2022-09-26T17:13:13Z

Functions called through a psci_initcall_t pointer all have non-const arguments. Fix the type definition to avoid tripping indirect call checks with CFI_CLANG. Suggested-by: Mark Rutland Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Tested-by: Kees Cook Tested-by: Nathan Chancellor Acked-by: Peter Zijlstra (Intel) Tested-by: Peter Zijlstra (Intel) Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20220908215504.3686827-9-samitolvanen@google.com

firmware/psci: fix application of sizeof to pointer

2021-10-26T22:40:54Z

sizeof when applied to a pointer typed expression gives the size of the pointer. ./drivers/firmware/psci/psci_checker.c:158:41-47: ERROR application of sizeof to pointer This issue was detected with the help of Coccinelle. Fixes: 7401056de5f8 ("drivers/firmware: psci_checker: stash and use topology_core_cpumask for hotplug tests") Cc: stable@vger.kernel.org Reported-by: Zeal Robot Acked-by: Mark Rutland Reviewed-by: Gustavo A. R. Silva Signed-off-by: jing yangyang Signed-off-by: Gustavo A. R. Silva

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2021-07-06T18:52:58Z

Pull ARM development updates from Russell King: - Make it clear __swp_entry_to_pte() uses PTE_TYPE_FAULT - Updates for setting vmalloc size via command line to resolve an issue with the 8MiB hole not properly being accounted for, and clean up the code. - ftrace support for module PLTs - Spelling fixes - kbuild updates for removing generated files and pattern rules for generating files - Clang/llvm updates - Change the way the kernel is mapped, placing it in vmalloc space instead. - Remove arm_pm_restart from arm and aarch64. * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (29 commits) ARM: 9098/1: ftrace: MODULE_PLT: Fix build problem without DYNAMIC_FTRACE ARM: 9097/1: mmu: Declare section start/end correctly ARM: 9096/1: Remove arm_pm_restart() ARM: 9095/1: ARM64: Remove arm_pm_restart() ARM: 9094/1: Register with kernel restart handler ARM: 9093/1: drivers: firmwapsci: Register with kernel restart handler ARM: 9092/1: xen: Register with kernel restart handler ARM: 9091/1: Revert "mm: qsd8x50: Fix incorrect permission faults" ARM: 9090/1: Map the lowmem and kernel separately ARM: 9089/1: Define kernel physical section start and end ARM: 9088/1: Split KERNEL_OFFSET from PAGE_OFFSET ARM: 9087/1: kprobes: test-thumb: fix for LLVM_IAS=1 ARM: 9086/1: syscalls: use pattern rules to generate syscall headers ARM: 9085/1: remove unneeded abi parameter to syscallnr.sh ARM: 9084/1: simplify the build rule of mach-types.h ARM: 9083/1: uncompress: atags_to_fdt: Spelling s/REturn/Return/ ARM: 9082/1: [v2] mark prepare_page_table as __init ARM: 9079/1: ftrace: Add MODULE_PLTS support ARM: 9078/1: Add warn suppress parameter to arm_gen_branch_link() ARM: 9077/1: PLT: Move struct plt_entries definition to header ...

PSCI: Use cpuidle context helpers in psci_cpu_suspend_enter()

2021-06-17T17:00:39Z

The PSCI CPU suspend code isn't aware of the PMR vs DAIF game, resulting in a system that locks up if entering CPU suspend with GICv3 pNMI enabled. To save the day, teach the suspend code about our new cpuidle context helpers, which will do everything that's required just like the usual WFI cpuidle code. This fixes my Altra system, which would otherwise lock-up at boot time when booted with irqchip.gicv3_pseudo_nmi=1. Tested-by: Valentin Schneider Reviewed-by: Lorenzo Pieralisi Signed-off-by: Marc Zyngier Reviewed-by: Sudeep Holla Link: https://lore.kernel.org/r/20210615111227.2454465-4-maz@kernel.org Signed-off-by: Will Deacon