From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock Add a sleepable verifier test that loads a graph-node local kptr in an explicit RCU read-side critical section, then passes its node to bpf_rbtree_remove() after the section ends. Before the verifier fix, the stale NON_OWN_REF flag makes the node look like a live borrowed reference and the program is accepted. After the fix, the pointer is demoted without NON_OWN_REF and the graph kfunc argument is rejected. Also exercise a graph kptr loaded while a spin lock provides implicit RCU protection. The pointer must be invalidated when the lock is released, which guards the required ordering between non-owning-reference invalidation and RCU demotion. Update the existing fault-protected load test state description. The post-unlock pointer no longer carries NON_OWN_REF, but remains readable because the load is rewritten to use BPF_PROBE_MEM. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/soc/mediatek/Kconfig | 92 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 drivers/soc/mediatek/Kconfig (limited to 'drivers/soc/mediatek/Kconfig') diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig new file mode 100644 index 000000000..d7293977f --- /dev/null +++ b/drivers/soc/mediatek/Kconfig @@ -0,0 +1,92 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# MediaTek SoC drivers +# +menu "MediaTek SoC drivers" + depends on ARCH_MEDIATEK || COMPILE_TEST + +config MTK_CMDQ + tristate "MediaTek CMDQ Support" + depends on ARCH_MEDIATEK || COMPILE_TEST + select MAILBOX + select MTK_CMDQ_MBOX + select MTK_INFRACFG + help + Say yes here to add support for the MediaTek Command Queue (CMDQ) + driver. The CMDQ is used to help read/write registers with critical + time limitation, such as updating display configuration during the + vblank. + +config MTK_DEVAPC + tristate "Mediatek Device APC Support" + help + Say yes here to enable support for Mediatek Device APC driver. + This driver is mainly used to handle the violation which catches + unexpected transaction. + The violation information is logged for further analysis or + countermeasures. + +config MTK_DVFSRC + tristate "MediaTek DVFSRC Support" + depends on ARCH_MEDIATEK + help + Say yes here to add support for the MediaTek Dynamic Voltage + and Frequency Scaling Resource Collector (DVFSRC): a HW + IP found on many MediaTek SoCs, which is responsible for + collecting DVFS requests from various SoC IPs, other than + software, and performing bandwidth scaling to provide the + best achievable performance-per-watt. + +config MTK_INFRACFG + bool "MediaTek INFRACFG Support" + select REGMAP + help + Say yes here to add support for the MediaTek INFRACFG controller. The + INFRACFG controller contains various infrastructure registers not + directly associated to any device. + +config MTK_PMIC_WRAP + tristate "MediaTek PMIC Wrapper Support" + depends on RESET_CONTROLLER + depends on OF + select REGMAP + help + Say yes here to add support for MediaTek PMIC Wrapper found + on different MediaTek SoCs. The PMIC wrapper is a proprietary + hardware to connect the PMIC. + +config MTK_REGULATOR_COUPLER + bool "MediaTek SoC Regulator Coupler" if COMPILE_TEST + default ARCH_MEDIATEK + depends on REGULATOR + +config MTK_MMSYS + tristate "MediaTek MMSYS Support" + default ARCH_MEDIATEK + depends on HAS_IOMEM + depends on MTK_CMDQ || MTK_CMDQ=n + help + Say yes here to add support for the MediaTek Multimedia + Subsystem (MMSYS). + +config MTK_SVS + tristate "MediaTek Smart Voltage Scaling(SVS)" + depends on NVMEM_MTK_EFUSE && NVMEM + help + The Smart Voltage Scaling(SVS) engine is a piece of hardware + which has several controllers(banks) for calculating suitable + voltage to different power domains(CPU/GPU/CCI) according to + chip process corner, temperatures and other factors. Then DVFS + driver could apply SVS bank voltage to PMIC/Buck. + +config MTK_SOCINFO + tristate "MediaTek SoC Information" + default y + depends on NVMEM_MTK_EFUSE + select SOC_BUS + help + The MediaTek SoC Information (mtk-socinfo) driver provides + information about the SoC to the userspace including the + manufacturer name, marketing name and soc name. + +endmenu -- cgit v1.3.1