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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 10:43:19 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 07:58:36 -0700 |
| commit | 6668ed271eaefaa63e686bdfbedaeb7b8e492722 (patch) | |
| tree | 58e8288fead484f6755ad0815fc74c3742663761 /sound/soc/codecs/max98373-sdw.h | |
| download | linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.tar.gz linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.zip | |
selftests/bpf: Reject graph kptr use after RCU unlockgrafted
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 <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'sound/soc/codecs/max98373-sdw.h')
| -rw-r--r-- | sound/soc/codecs/max98373-sdw.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98373-sdw.h b/sound/soc/codecs/max98373-sdw.h new file mode 100644 index 000000000..2d8033515 --- /dev/null +++ b/sound/soc/codecs/max98373-sdw.h @@ -0,0 +1,72 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (c) 2020 Maxim Integrated */ + +#ifndef _MAX98373_SDW_H +#define _MAX98373_SDW_H + +#include "max98373.h" + +/* SoundWire Slave Control Port (SCP) */ +#define MAX98373_R0040_SCP_INIT_STAT_1 0x0040 +#define MAX98373_R0041_SCP_INIT_MASK_1 0x0041 +#define MAX98373_R0042_SCP_INIT_STAT_2 0x0042 +#define MAX98373_R0044_SCP_CTRL 0x0044 +#define MAX98373_R0045_SCP_SYSTEM_CTRL 0x0045 +#define MAX98373_R0046_SCP_DEV_NUMBER 0x0046 +#define MAX98373_R0050_SCP_DEV_ID_0 0x0050 +#define MAX98373_R0051_SCP_DEV_ID_1 0x0051 +#define MAX98373_R0052_SCP_DEV_ID_2 0x0052 +#define MAX98373_R0053_SCP_DEV_ID_3 0x0053 +#define MAX98373_R0054_SCP_DEV_ID_4 0x0054 +#define MAX98373_R0055_SCP_DEV_ID_5 0x0055 +#define MAX98373_R0060_SCP_FRAME_CTLR 0x0060 +#define MAX98373_R0070_SCP_FRAME_CTLR 0x0070 + +/* SoundWire Device Data Port (DP) */ +/* Data Port 1 Registers */ +#define MAX98373_R0100_DP1_INIT_STAT 0x0100 +#define MAX98373_R0101_DP1_INIT_MASK 0x0101 +#define MAX98373_R0102_DP1_PORT_CTRL 0x0102 +#define MAX98373_R0103_DP1_BLOCK_CTRL_1 0x0103 +#define MAX98373_R0104_DP1_PREPARE_STATUS 0x0104 +#define MAX98373_R0105_DP1_PREPARE_CTRL 0x0105 +/* Data Port 1 Bank 0 Registers */ +#define MAX98373_R0120_DP1_CHANNEL_EN 0x0120 +#define MAX98373_R0122_DP1_SAMPLE_CTRL1 0x0122 +#define MAX98373_R0123_DP1_SAMPLE_CTRL2 0x0123 +#define MAX98373_R0124_DP1_OFFSET_CTRL1 0x0124 +#define MAX98373_R0125_DP1_OFFSET_CTRL2 0x0125 +#define MAX98373_R0126_DP1_HCTRL 0x0126 +#define MAX98373_R0127_DP1_BLOCK_CTRL3 0x0127 +/* Data Port 1 Bank 1 Registers */ +#define MAX98373_R0130_DP1_CHANNEL_EN 0x0130 +#define MAX98373_R0132_DP1_SAMPLE_CTRL1 0x0132 +#define MAX98373_R0133_DP1_SAMPLE_CTRL2 0x0133 +#define MAX98373_R0134_DP1_OFFSET_CTRL1 0x0134 +#define MAX98373_R0135_DP1_OFFSET_CTRL2 0x0135 +#define MAX98373_R0136_DP1_HCTRL 0x0136 +#define MAX98373_R0137_DP1_BLOCK_CTRL3 0x0137 +/* Data Port 3 Registers */ +#define MAX98373_R0300_DP3_INIT_STAT 0x0300 +#define MAX98373_R0301_DP3_INIT_MASK 0x0301 +#define MAX98373_R0302_DP3_PORT_CTRL 0x0302 +#define MAX98373_R0303_DP3_BLOCK_CTRL_1 0x0303 +#define MAX98373_R0304_DP3_PREPARE_STATUS 0x0304 +#define MAX98373_R0305_DP3_PREPARE_CTRL 0x0305 +/* Data Port 3 Bank 0 Registers */ +#define MAX98373_R0320_DP3_CHANNEL_EN 0x0320 +#define MAX98373_R0322_DP3_SAMPLE_CTRL1 0x0322 +#define MAX98373_R0323_DP3_SAMPLE_CTRL2 0x0323 +#define MAX98373_R0324_DP3_OFFSET_CTRL1 0x0324 +#define MAX98373_R0325_DP3_OFFSET_CTRL2 0x0325 +#define MAX98373_R0326_DP3_HCTRL 0x0326 +#define MAX98373_R0327_DP3_BLOCK_CTRL3 0x0327 +/* Data Port 3 Bank 1 Registers */ +#define MAX98373_R0330_DP3_CHANNEL_EN 0x0330 +#define MAX98373_R0332_DP3_SAMPLE_CTRL1 0x0332 +#define MAX98373_R0333_DP3_SAMPLE_CTRL2 0x0333 +#define MAX98373_R0334_DP3_OFFSET_CTRL1 0x0334 +#define MAX98373_R0335_DP3_OFFSET_CTRL2 0x0335 +#define MAX98373_R0336_DP3_HCTRL 0x0336 +#define MAX98373_R0337_DP3_BLOCK_CTRL3 0x0337 +#endif |