BMC/Intel-BMC/linux.git/drivers/char/hw_random, branch dev-5.15-intel

hwrng: nomadik - Change clk_disable to clk_disable_unprepare

2022-04-08T12:23:09+00:00

[ Upstream commit 7f0f1f3ef62ed7a40e30aff28115bd94c4211d1d ] The corresponding API for clk_prepare_enable is clk_disable_unprepare, other than clk_disable_unprepare. Fix this by changing clk_disable to clk_disable_unprepare. Fixes: beca35d05cc2 ("hwrng: nomadik - use clk_prepare_enable()") Signed-off-by: Miaoqian Lin Reviewed-by: Linus Walleij Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin

hwrng: atmel - disable trng on failure path

2022-04-08T12:23:08+00:00

[ Upstream commit a223ea9f89ab960eb254ba78429efd42eaf845eb ] Call atmel_trng_disable() on failure path of probe. Fixes: a1fa98d8116f ("hwrng: atmel - disable TRNG during suspend") Signed-off-by: Claudiu Beznea Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin

hwrng: cavium - HW_RANDOM_CAVIUM should depend on ARCH_THUNDER

2022-04-08T12:23:05+00:00

[ Upstream commit ab7d88549e2f7ae116afd303f32e1950cb790a1d ] The Cavium ThunderX Random Number Generator is only present on Cavium ThunderX SoCs, and not available as an independent PCIe endpoint. Hence add a dependency on ARCH_THUNDER, to prevent asking the user about this driver when configuring a kernel without Cavium Thunder SoC support. Fixes: cc2f1908c6b8f625 ("hwrng: cavium - Add Cavium HWRNG driver for ThunderX SoC.") Signed-off-by: Geert Uytterhoeven Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin

hwrng: cavium - Check health status while reading random data

2022-04-08T12:23:05+00:00

[ Upstream commit 680efb33546be8960ccbb2f4e0e43034d9c93b30 ] This RNG device is present on Marvell OcteonTx2 silicons as well and also provides entropy health status. HW continuously checks health condition of entropy and reports faults. Fault is in terms of co-processor cycles since last fault detected. This doesn't get cleared and only updated when new fault is detected. Also there are chances of detecting false positives. So to detect a entropy failure SW has to check if failures are persistent ie cycles elapsed is frequently updated by HW. This patch adds support to detect health failures using below algo. 1. Consider any fault detected before 10ms as a false positive and ignore. 10ms is chosen randomly, no significance. 2. Upon first failure detection make a note of cycles elapsed and when this error happened in realtime (cntvct). 3. Upon subsequent failure, check if this is new or a old one by comparing current cycles with the ones since last failure. cycles or time since last failure is calculated using cycles and time info captured at (2). HEALTH_CHECK status register is not available to VF, hence had to map PF registers. Also since cycles are in terms of co-processor cycles, had to retrieve co-processor clock rate from RST device. Signed-off-by: Sunil Goutham Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin

hwrng: mtk - Force runtime pm ops for sleep ops

2021-11-18T18:16:31+00:00

[ Upstream commit b6f5f0c8f72d348b2d07b20d7b680ef13a7ffe98 ] Currently mtk_rng_runtime_suspend/resume is called for both runtime pm and system sleep operations. This is wrong as these should only be runtime ops as the name already suggests. Currently freezing the system will lead to a call to mtk_rng_runtime_suspend even if the device currently isn't active. This leads to a clock warning because it is disabled/unprepared although it isn't enabled/prepared currently. This patch fixes this by only setting the runtime pm ops and forces to call the runtime pm ops from the system sleep ops as well if active but not otherwise. Fixes: 81d2b34508c6 ("hwrng: mtk - add runtime PM support") Signed-off-by: Markus Schneider-Pargmann Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin

hwrng: Add Arm SMCCC TRNG based driver

2021-08-06T11:45:26+00:00

The "Arm True Random Number Generator Firmware Interface"[1] provides an SMCCC based interface to a true hardware random number generator. So far we are using that in arch_get_random_seed(), but it might be useful to expose the entropy through the /dev/hwrng device as well. This allows to assess the quality of the implementation, by using "rngtest" from the rng-tools package, for example. Add a simple platform driver implementing the hw_random interface. The corresponding platform device is created by the SMCCC core code, we just match it here by name and provide a module alias. Since the firmware takes care about serialisation, this can happily coexist with the arch_get_random_seed() bits. [1] https://developer.arm.com/documentation/den0098/latest/ Signed-off-by: Andre Przywara Reviewed-by: Ard Biesheuvel Reviewed-by: Mark Brown Signed-off-by: Herbert Xu

hwrng: rename 'mod_init' & 'mod_exit' functions to be module-specific

2021-07-16T07:49:36+00:00

Rename module_init & module_exit functions that are named "mod_init" and "mod_exit" so that they are unique in both the System.map file and in initcall_debug output instead of showing up as almost anonymous "mod_init". This is helpful for debugging and in determining how long certain module_init calls take to execute. Signed-off-by: Randy Dunlap Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Cc: Andres Salomon Cc: linux-geode@lists.infradead.org Cc: Matt Mackall Cc: Herbert Xu Cc: "David S. Miller" Cc: linux-crypto@vger.kernel.org Cc: Jason A. Donenfeld Signed-off-by: Herbert Xu

Merge tag 'arm-soc-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2021-07-10T16:22:44+00:00

Pull ARM SoC updates from Olof Johansson: "A few SoC (code) changes have queued up this cycle, mostly for minor changes and some refactoring and cleanup of legacy platforms. This branch also contains a few of the fixes that weren't sent in by the end of the release (all fairly minor). - Adding an additional maintainer for the TEE subsystem (Sumit Garg) - Quite a significant modernization of the IXP4xx platforms by Linus Walleij, revisiting with a new PCI host driver/binding, removing legacy mach/* include dependencies and moving platform detection/config to drivers/soc. Also some updates/cleanup of platform data. - Core power domain support for Tegra platforms, and some improvements in build test coverage by adding stubs for compile test targets. - A handful of updates to i.MX platforms, adding legacy (non-PSCI) SMP support on i.MX7D, SoC ID setup for i.MX50, removal of platform data and board fixups for iMX6/7. ... and a few smaller changes and fixes for Samsung, OMAP, Allwinner, Rockchip" * tag 'arm-soc-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (53 commits) MAINTAINERS: Add myself as TEE subsystem reviewer ixp4xx: fix spelling mistake in Kconfig "Devce" -> "Device" hw_random: ixp4xx: Add OF support hw_random: ixp4xx: Add DT bindings hw_random: ixp4xx: Turn into a module hw_random: ixp4xx: Use SPDX license tag hw_random: ixp4xx: enable compile-testing pata: ixp4xx: split platform data to its own header soc: ixp4xx: move cpu detection to linux/soc/ixp4xx/cpu.h PCI: ixp4xx: Add a new driver for IXP4xx PCI: ixp4xx: Add device tree bindings for IXP4xx ARM/ixp4xx: Make NEED_MACH_IO_H optional ARM/ixp4xx: Move the virtual IObases MAINTAINERS: ARM/MStar/Sigmastar SoCs: Add a link to the MStar tree ARM: debug: add UART early console support for MSTAR SoCs ARM: dts: ux500: Fix LED probing ARM: imx: add smp support for imx7d ARM: imx6q: drop of_platform_default_populate() from init_machine arm64: dts: rockchip: Update RK3399 PCI host bridge window to 32-bit address memory soc/tegra: fuse: Fix Tegra234-only builds ...

Merge tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2021-07-05T20:42:16+00:00

Pull char / misc driver updates from Greg KH: "Here is the big set of char / misc and other driver subsystem updates for 5.14-rc1. Included in here are: - habanalabs driver updates - fsl-mc driver updates - comedi driver updates - fpga driver updates - extcon driver updates - interconnect driver updates - mei driver updates - nvmem driver updates - phy driver updates - pnp driver updates - soundwire driver updates - lots of other tiny driver updates for char and misc drivers This is looking more and more like the "various driver subsystems mushed together" tree... All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (292 commits) mcb: Use DEFINE_RES_MEM() helper macro and fix the end address PNP: moved EXPORT_SYMBOL so that it immediately followed its function/variable bus: mhi: pci-generic: Add missing 'pci_disable_pcie_error_reporting()' calls bus: mhi: Wait for M2 state during system resume bus: mhi: core: Fix power down latency intel_th: Wait until port is in reset before programming it intel_th: msu: Make contiguous buffers uncached intel_th: Remove an unused exit point from intel_th_remove() stm class: Spelling fix nitro_enclaves: Set Bus Master for the NE PCI device misc: ibmasm: Modify matricies to matrices misc: vmw_vmci: return the correct errno code siox: Simplify error handling via dev_err_probe() fpga: machxo2-spi: Address warning about unused variable lkdtm/heap: Add init_on_alloc tests selftests/lkdtm: Enable various testable CONFIGs lkdtm: Add CONFIG hints in errors where possible lkdtm: Enable DOUBLE_FAULT on all architectures lkdtm/heap: Add vmalloc linear overflow test lkdtm/bugs: XFAIL UNALIGNED_LOAD_STORE_WRITE ...

hw_random: ixp4xx: Add OF support

2021-06-17T13:31:05+00:00

This makes the hardware random number generator found in the IXP46x SoCs probe from the device tree. Cc: Deepak Saxena Acked-by: Herbert Xu Signed-off-by: Linus Walleij