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 --- drivers/accessibility/speakup/utils.h | 102 ++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 drivers/accessibility/speakup/utils.h (limited to 'drivers/accessibility/speakup/utils.h') diff --git a/drivers/accessibility/speakup/utils.h b/drivers/accessibility/speakup/utils.h new file mode 100644 index 000000000..db00c962f --- /dev/null +++ b/drivers/accessibility/speakup/utils.h @@ -0,0 +1,102 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* utils.h + * originally written by: Kirk Reiser. + * + ** Copyright (C) 2002 Kirk Reiser. + * Copyright (C) 2003 David Borowski. + */ + +#include + +#define MAXKEYS 512 +#define MAXKEYVAL 160 +#define HASHSIZE 101 +#define is_shift -3 +#define is_spk -2 +#define is_input -1 + +struct st_key { + char *name; + struct st_key *next; + int value, shift; +}; + +struct st_key key_table[MAXKEYS]; +struct st_key *extra_keys = key_table+HASHSIZE; +char *def_name, *def_val; +FILE *infile; +int lc; + +char filename[256]; + +static inline void open_input(const char *dir_name, const char *name) +{ + if (dir_name) + snprintf(filename, sizeof(filename), "%s/%s", dir_name, name); + else + snprintf(filename, sizeof(filename), "%s", name); + infile = fopen(filename, "r"); + if (!infile) { + fprintf(stderr, "can't open %s\n", filename); + exit(1); + } + lc = 0; +} + +static inline int oops(const char *msg, const char *info) +{ + if (info == NULL) + info = ""; + fprintf(stderr, "error: file %s line %d\n", filename, lc); + fprintf(stderr, "%s %s\n", msg, info); + exit(1); +} + +static inline struct st_key *hash_name(char *name) +{ + unsigned char *pn = (unsigned char *)name; + int hash = 0; + + while (*pn) { + hash = (hash * 17) & 0xfffffff; + if (isupper(*pn)) + *pn = tolower(*pn); + hash += (int)*pn; + pn++; + } + hash %= HASHSIZE; + return &key_table[hash]; +} + +static inline struct st_key *find_key(char *name) +{ + struct st_key *this = hash_name(name); + + while (this) { + if (this->name && !strcmp(name, this->name)) + return this; + this = this->next; + } + return this; +} + +static inline struct st_key *add_key(char *name, int value, int shift) +{ + struct st_key *this = hash_name(name); + + if (extra_keys-key_table >= MAXKEYS) + oops("out of key table space, enlarge MAXKEYS", NULL); + if (this->name != NULL) { + while (this->next) { + if (!strcmp(name, this->name)) + oops("attempt to add duplicate key", name); + this = this->next; + } + this->next = extra_keys++; + this = this->next; + } + this->name = strdup(name); + this->value = value; + this->shift = shift; + return this; +} -- cgit v1.3.1