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 --- sound/soc/codecs/rt1318-sdw.h | 96 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 sound/soc/codecs/rt1318-sdw.h (limited to 'sound/soc/codecs/rt1318-sdw.h') diff --git a/sound/soc/codecs/rt1318-sdw.h b/sound/soc/codecs/rt1318-sdw.h new file mode 100644 index 000000000..86e83d63a --- /dev/null +++ b/sound/soc/codecs/rt1318-sdw.h @@ -0,0 +1,96 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * rt1318-sdw.h -- RT1318 SDCA ALSA SoC audio driver header + * + * Copyright(c) 2022 Realtek Semiconductor Corp. + */ + +#ifndef __RT1318_SDW_H__ +#define __RT1318_SDW_H__ + +#include +#include +#include +#include +#include + +/* imp-defined registers */ +#define RT1318_SAPU_SM 0x3203 + +#define R1318_TCON 0xc203 +#define R1318_TCON_RELATED_1 0xc206 + +#define R1318_SPK_TEMPERATRUE_PROTECTION_0 0xdb00 +#define R1318_SPK_TEMPERATRUE_PROTECTION_L_4 0xdb08 +#define R1318_SPK_TEMPERATRUE_PROTECTION_R_4 0xdd08 + +#define R1318_SPK_TEMPERATRUE_PROTECTION_L_6 0xdb12 +#define R1318_SPK_TEMPERATRUE_PROTECTION_R_6 0xdd12 + +#define RT1318_INIT_RECIPROCAL_REG_L_24 0xdbb5 +#define RT1318_INIT_RECIPROCAL_REG_L_23_16 0xdbb6 +#define RT1318_INIT_RECIPROCAL_REG_L_15_8 0xdbb7 +#define RT1318_INIT_RECIPROCAL_REG_L_7_0 0xdbb8 +#define RT1318_INIT_RECIPROCAL_REG_R_24 0xddb5 +#define RT1318_INIT_RECIPROCAL_REG_R_23_16 0xddb6 +#define RT1318_INIT_RECIPROCAL_REG_R_15_8 0xddb7 +#define RT1318_INIT_RECIPROCAL_REG_R_7_0 0xddb8 + +#define RT1318_INIT_R0_RECIPROCAL_SYN_L_24 0xdbc5 +#define RT1318_INIT_R0_RECIPROCAL_SYN_L_23_16 0xdbc6 +#define RT1318_INIT_R0_RECIPROCAL_SYN_L_15_8 0xdbc7 +#define RT1318_INIT_R0_RECIPROCAL_SYN_L_7_0 0xdbc8 +#define RT1318_INIT_R0_RECIPROCAL_SYN_R_24 0xddc5 +#define RT1318_INIT_R0_RECIPROCAL_SYN_R_23_16 0xddc6 +#define RT1318_INIT_R0_RECIPROCAL_SYN_R_15_8 0xddc7 +#define RT1318_INIT_R0_RECIPROCAL_SYN_R_7_0 0xddc8 + +#define RT1318_R0_COMPARE_FLAG_L 0xdb35 +#define RT1318_R0_COMPARE_FLAG_R 0xdd35 + +#define RT1318_STP_INITIAL_RS_TEMP_H 0xdd93 +#define RT1318_STP_INITIAL_RS_TEMP_L 0xdd94 + +/* RT1318 SDCA Control - function number */ +#define FUNC_NUM_SMART_AMP 0x04 + +/* RT1318 SDCA entity */ +#define RT1318_SDCA_ENT_PDE23 0x31 +#define RT1318_SDCA_ENT_XU24 0x24 +#define RT1318_SDCA_ENT_FU21 0x03 +#define RT1318_SDCA_ENT_UDMPU21 0x02 +#define RT1318_SDCA_ENT_CS21 0x21 +#define RT1318_SDCA_ENT_SAPU 0x29 + +/* RT1318 SDCA control */ +#define RT1318_SDCA_CTL_SAMPLE_FREQ_INDEX 0x10 +#define RT1318_SDCA_CTL_REQ_POWER_STATE 0x01 +#define RT1318_SDCA_CTL_FU_MUTE 0x01 +#define RT1318_SDCA_CTL_FU_VOLUME 0x02 +#define RT1318_SDCA_CTL_UDMPU_CLUSTER 0x10 +#define RT1318_SDCA_CTL_SAPU_PROTECTION_MODE 0x10 +#define RT1318_SDCA_CTL_SAPU_PROTECTION_STATUS 0x11 + +/* RT1318 SDCA channel */ +#define CH_L 0x01 +#define CH_R 0x02 + +/* sample frequency index */ +#define RT1318_SDCA_RATE_16000HZ 0x04 +#define RT1318_SDCA_RATE_32000HZ 0x07 +#define RT1318_SDCA_RATE_44100HZ 0x08 +#define RT1318_SDCA_RATE_48000HZ 0x09 +#define RT1318_SDCA_RATE_96000HZ 0x0b +#define RT1318_SDCA_RATE_192000HZ 0x0d + + +struct rt1318_sdw_priv { + struct snd_soc_component *component; + struct regmap *regmap; + struct sdw_slave *sdw_slave; + struct sdw_bus_params params; + bool hw_init; + bool first_hw_init; +}; + +#endif /* __RT1318_SDW_H__ */ -- cgit v1.3.1