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/sdca_regmap.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 include/sound/sdca_regmap.h (limited to 'include/sound/sdca_regmap.h') diff --git a/include/sound/sdca_regmap.h b/include/sound/sdca_regmap.h new file mode 100644 index 000000000..792540a53 --- /dev/null +++ b/include/sound/sdca_regmap.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * The MIPI SDCA specification is available for public downloads at + * https://www.mipi.org/mipi-sdca-v1-0-download + * + * Copyright (C) 2025 Cirrus Logic, Inc. and + * Cirrus Logic International Semiconductor Ltd. + */ + +#ifndef __SDCA_REGMAP_H__ +#define __SDCA_REGMAP_H__ + +struct device; +struct sdca_function_data; +struct regmap; +struct reg_default; + +bool sdca_regmap_readable(struct sdca_function_data *function, unsigned int reg); +bool sdca_regmap_writeable(struct sdca_function_data *function, unsigned int reg); +bool sdca_regmap_volatile(struct sdca_function_data *function, unsigned int reg); +bool sdca_regmap_deferrable(struct sdca_function_data *function, unsigned int reg); +int sdca_regmap_mbq_size(struct sdca_function_data *function, unsigned int reg); + +int sdca_regmap_count_constants(struct device *dev, struct sdca_function_data *function); +int sdca_regmap_populate_constants(struct device *dev, struct sdca_function_data *function, + struct reg_default *consts); + +int sdca_regmap_write_defaults(struct device *dev, struct regmap *regmap, + struct sdca_function_data *function); +int sdca_regmap_write_init(struct device *dev, struct regmap *regmap, + struct sdca_function_data *function); + +#endif // __SDCA_REGMAP_H__ -- cgit v1.3.1