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/hid/hid-sunplus.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 drivers/hid/hid-sunplus.c (limited to 'drivers/hid/hid-sunplus.c') diff --git a/drivers/hid/hid-sunplus.c b/drivers/hid/hid-sunplus.c new file mode 100644 index 000000000..64e4cff8c --- /dev/null +++ b/drivers/hid/hid-sunplus.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * HID driver for some sunplus "special" devices + * + * Copyright (c) 1999 Andreas Gal + * Copyright (c) 2000-2005 Vojtech Pavlik + * Copyright (c) 2005 Michael Haboustak for Concept2, Inc + * Copyright (c) 2006-2007 Jiri Kosina + * Copyright (c) 2008 Jiri Slaby + */ + +/* + */ + +#include +#include +#include + +#include "hid-ids.h" + +static const __u8 *sp_report_fixup(struct hid_device *hdev, __u8 *rdesc, + unsigned int *rsize) +{ + if (*rsize >= 112 && rdesc[104] == 0x26 && rdesc[105] == 0x80 && + rdesc[106] == 0x03) { + hid_info(hdev, "fixing up Sunplus Wireless Desktop report descriptor\n"); + rdesc[105] = rdesc[110] = 0x03; + rdesc[106] = rdesc[111] = 0x21; + } + return rdesc; +} + +#define sp_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ + EV_KEY, (c)) +static int sp_input_mapping(struct hid_device *hdev, struct hid_input *hi, + struct hid_field *field, struct hid_usage *usage, + unsigned long **bit, int *max) +{ + if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) + return 0; + + switch (usage->hid & HID_USAGE) { + case 0x2003: sp_map_key_clear(KEY_ZOOMIN); break; + case 0x2103: sp_map_key_clear(KEY_ZOOMOUT); break; + default: + return 0; + } + return 1; +} + +static const struct hid_device_id sp_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) }, + { } +}; +MODULE_DEVICE_TABLE(hid, sp_devices); + +static struct hid_driver sp_driver = { + .name = "sunplus", + .id_table = sp_devices, + .report_fixup = sp_report_fixup, + .input_mapping = sp_input_mapping, +}; +module_hid_driver(sp_driver); + +MODULE_DESCRIPTION("HID driver for some sunplus \"special\" devices"); +MODULE_LICENSE("GPL"); -- cgit v1.3.1