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/scsi/scsi_ioctl.h | 55 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 include/scsi/scsi_ioctl.h (limited to 'include/scsi/scsi_ioctl.h') diff --git a/include/scsi/scsi_ioctl.h b/include/scsi/scsi_ioctl.h new file mode 100644 index 000000000..a207c07da --- /dev/null +++ b/include/scsi/scsi_ioctl.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _SCSI_IOCTL_H +#define _SCSI_IOCTL_H + +#define SCSI_IOCTL_SEND_COMMAND 1 +#define SCSI_IOCTL_TEST_UNIT_READY 2 +#define SCSI_IOCTL_BENCHMARK_COMMAND 3 +#define SCSI_IOCTL_SYNC 4 /* Request synchronous parameters */ +#define SCSI_IOCTL_START_UNIT 5 +#define SCSI_IOCTL_STOP_UNIT 6 +/* The door lock/unlock constants are compatible with Sun constants for + the cdrom */ +#define SCSI_IOCTL_DOORLOCK 0x5380 /* lock the eject mechanism */ +#define SCSI_IOCTL_DOORUNLOCK 0x5381 /* unlock the mechanism */ + +#define SCSI_REMOVAL_PREVENT 1 +#define SCSI_REMOVAL_ALLOW 0 + +#ifdef __KERNEL__ + +struct gendisk; +struct scsi_device; +struct sg_io_hdr; + +/* + * Structures used for scsi_ioctl et al. + */ + +typedef struct scsi_ioctl_command { + unsigned int inlen; + unsigned int outlen; + unsigned char data[]; +} Scsi_Ioctl_Command; + +typedef struct scsi_idlun { + __u32 dev_id; + __u32 host_unique_id; +} Scsi_Idlun; + +/* Fibre Channel WWN, port_id struct */ +typedef struct scsi_fctargaddress { + __u32 host_port_id; + unsigned char host_wwn[8]; // include NULL term. +} Scsi_FCTargAddress; + +int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev, + int cmd, bool ndelay); +int scsi_ioctl(struct scsi_device *sdev, bool open_for_write, int cmd, + void __user *arg); +int get_sg_io_hdr(struct sg_io_hdr *hdr, const void __user *argp); +int put_sg_io_hdr(const struct sg_io_hdr *hdr, void __user *argp); +bool scsi_cmd_allowed(unsigned char *cmd, bool open_for_write); + +#endif /* __KERNEL__ */ +#endif /* _SCSI_IOCTL_H */ -- cgit v1.3.1