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/util_mem.h | 51 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 include/sound/util_mem.h (limited to 'include/sound/util_mem.h') diff --git a/include/sound/util_mem.h b/include/sound/util_mem.h new file mode 100644 index 000000000..01310e089 --- /dev/null +++ b/include/sound/util_mem.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __SOUND_UTIL_MEM_H +#define __SOUND_UTIL_MEM_H + +#include +/* + * Copyright (C) 2000 Takashi Iwai + * + * Generic memory management routines for soundcard memory allocation + */ + +/* + * memory block + */ +struct snd_util_memblk { + unsigned int size; /* size of this block */ + unsigned int offset; /* zero-offset of this block */ + struct list_head list; /* link */ +}; + +#define snd_util_memblk_argptr(blk) (void*)((char*)(blk) + sizeof(struct snd_util_memblk)) + +/* + * memory management information + */ +struct snd_util_memhdr { + unsigned int size; /* size of whole data */ + struct list_head block; /* block linked-list header */ + int nblocks; /* # of allocated blocks */ + unsigned int used; /* used memory size */ + int block_extra_size; /* extra data size of chunk */ + struct mutex block_mutex; /* lock */ +}; + +/* + * prototypes + */ +struct snd_util_memhdr *snd_util_memhdr_new(int memsize); +void snd_util_memhdr_free(struct snd_util_memhdr *hdr); +struct snd_util_memblk *snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size); +int snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk); +int snd_util_mem_avail(struct snd_util_memhdr *hdr); + +/* functions without mutex */ +struct snd_util_memblk *__snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size); +void __snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk); +struct snd_util_memblk *__snd_util_memblk_new(struct snd_util_memhdr *hdr, + unsigned int units, + struct list_head *prev); + +#endif /* __SOUND_UTIL_MEM_H */ -- cgit v1.3.1