From 2bc6b218717b9d08f466f88209251d54bc09b207 Mon Sep 17 00:00:00 2001 From: Fuad Tabba Date: Tue, 22 Sep 2026 19:14:30 +0100 Subject: arm64/boot: Disable trapping of PMZR_EL0 writes to EL2 __init_el2_fgt2() writes one mask to both HDFGRTR2_EL2 and HDFGWTR2_EL2. PMZR_EL0 is write-only, so its trap bit, nPMZR_EL0, exists only in HDFGWTR2_EL2 and is therefore never set: a PMZR_EL0 write from the host traps to EL2, where the nVHE hypervisor has no handler and BUG()s. The kernel never writes PMZR_EL0, but kernel.perf_user_access=1 has the PMU driver set PMUSERENR_EL0.UEN for a task with a user-read event, so a write from EL0 reaches the trap and takes the host down without a panic message. Accumulate the HDFGWTR2_EL2 bits separately, as __init_el2_fgt() already does for HDFGWTR_EL2, and set nPMZR_EL0 with the other FEAT_PMUv3p9 bits. Fixes: 858c7bfcb35e1 ("arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9") Cc: stable@vger.kernel.org Signed-off-by: Fuad Tabba Reviewed-by: Anshuman Khandual Reviewed-by: Oliver Upton Signed-off-by: Will Deacon --- include/sound/i2c.h | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 include/sound/i2c.h (limited to 'include/sound/i2c.h') diff --git a/include/sound/i2c.h b/include/sound/i2c.h new file mode 100644 index 000000000..6f0162ae9 --- /dev/null +++ b/include/sound/i2c.h @@ -0,0 +1,88 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __SOUND_I2C_H +#define __SOUND_I2C_H + +/* + */ + +#define SND_I2C_DEVICE_ADDRTEN (1<<0) /* 10-bit I2C address */ + +struct snd_i2c_device { + struct list_head list; + struct snd_i2c_bus *bus; /* I2C bus */ + char name[32]; /* some useful device name */ + unsigned short flags; /* device flags */ + unsigned short addr; /* device address (might be 10-bit) */ + unsigned long private_value; + void *private_data; + void (*private_free)(struct snd_i2c_device *device); +}; + +#define snd_i2c_device(n) list_entry(n, struct snd_i2c_device, list) + +struct snd_i2c_bit_ops { + void (*start)(struct snd_i2c_bus *bus); /* transfer start */ + void (*stop)(struct snd_i2c_bus *bus); /* transfer stop */ + void (*direction)(struct snd_i2c_bus *bus, int clock, int data); /* set line direction (0 = write, 1 = read) */ + void (*setlines)(struct snd_i2c_bus *bus, int clock, int data); + int (*getclock)(struct snd_i2c_bus *bus); + int (*getdata)(struct snd_i2c_bus *bus, int ack); +}; + +struct snd_i2c_ops { + int (*sendbytes)(struct snd_i2c_device *device, unsigned char *bytes, int count); + int (*readbytes)(struct snd_i2c_device *device, unsigned char *bytes, int count); + int (*probeaddr)(struct snd_i2c_bus *bus, unsigned short addr); +}; + +struct snd_i2c_bus { + struct snd_card *card; /* card which I2C belongs to */ + char name[32]; /* some useful label */ + + struct mutex lock_mutex; + + struct snd_i2c_bus *master; /* master bus when SCK/SCL is shared */ + struct list_head buses; /* master: slave buses sharing SCK/SCL, slave: link list */ + + struct list_head devices; /* attached devices to this bus */ + + union { + struct snd_i2c_bit_ops *bit; + void *ops; + } hw_ops; /* lowlevel operations */ + const struct snd_i2c_ops *ops; /* midlevel operations */ + + unsigned long private_value; + void *private_data; + void (*private_free)(struct snd_i2c_bus *bus); +}; + +#define snd_i2c_slave_bus(n) list_entry(n, struct snd_i2c_bus, buses) + +int snd_i2c_bus_create(struct snd_card *card, const char *name, + struct snd_i2c_bus *master, struct snd_i2c_bus **ri2c); +int snd_i2c_device_create(struct snd_i2c_bus *bus, const char *name, + unsigned char addr, struct snd_i2c_device **rdevice); +int snd_i2c_device_free(struct snd_i2c_device *device); + +static inline void snd_i2c_lock(struct snd_i2c_bus *bus) +{ + if (bus->master) + mutex_lock(&bus->master->lock_mutex); + else + mutex_lock(&bus->lock_mutex); +} + +static inline void snd_i2c_unlock(struct snd_i2c_bus *bus) +{ + if (bus->master) + mutex_unlock(&bus->master->lock_mutex); + else + mutex_unlock(&bus->lock_mutex); +} + +int snd_i2c_sendbytes(struct snd_i2c_device *device, unsigned char *bytes, int count); +int snd_i2c_readbytes(struct snd_i2c_device *device, unsigned char *bytes, int count); +int snd_i2c_probeaddr(struct snd_i2c_bus *bus, unsigned short addr); + +#endif /* __SOUND_I2C_H */ -- cgit v1.3.1