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/usb/dwc2/debug.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 drivers/usb/dwc2/debug.h (limited to 'drivers/usb/dwc2/debug.h') diff --git a/drivers/usb/dwc2/debug.h b/drivers/usb/dwc2/debug.h new file mode 100644 index 000000000..47252c56d --- /dev/null +++ b/drivers/usb/dwc2/debug.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * debug.h - Designware USB2 DRD controller debug header + * + * Copyright (C) 2015 Intel Corporation + * Mian Yousaf Kaukab + */ + +#include "core.h" + +#ifdef CONFIG_DEBUG_FS +int dwc2_debugfs_init(struct dwc2_hsotg *hsotg); +void dwc2_debugfs_exit(struct dwc2_hsotg *hsotg); +#else +static inline int dwc2_debugfs_init(struct dwc2_hsotg *hsotg) +{ return 0; } +static inline void dwc2_debugfs_exit(struct dwc2_hsotg *hsotg) +{ } +#endif -- cgit v1.3.1