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| author | Fuad Tabba <fuad.tabba@linux.dev> | 2026-09-22 19:14:30 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2026-09-23 12:34:30 +0000 |
| commit | 2bc6b218717b9d08f466f88209251d54bc09b207 (patch) | |
| tree | cb91c941eccb15f94cbec4e96aa3a9c8736b5d66 /include/dt-bindings/pinctrl/sppctl.h | |
| download | linux-stable-2bc6b218717b9d08f466f88209251d54bc09b207.tar.gz linux-stable-2bc6b218717b9d08f466f88209251d54bc09b207.zip | |
arm64/boot: Disable trapping of PMZR_EL0 writes to EL2grafted
__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 <fuad.tabba@linux.dev>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Oliver Upton <oupton@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'include/dt-bindings/pinctrl/sppctl.h')
| -rw-r--r-- | include/dt-bindings/pinctrl/sppctl.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/dt-bindings/pinctrl/sppctl.h b/include/dt-bindings/pinctrl/sppctl.h new file mode 100644 index 000000000..50557265d --- /dev/null +++ b/include/dt-bindings/pinctrl/sppctl.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/* + * Sunplus dt-bindings Pinctrl header file + * Copyright (C) Sunplus Tech / Tibbo Tech. + * Author: Dvorkin Dmitry <dvorkin@tibbo.com> + */ + +#ifndef __DT_BINDINGS_PINCTRL_SPPCTL_H__ +#define __DT_BINDINGS_PINCTRL_SPPCTL_H__ + +#define IOP_G_MASTE (0x01 << 0) +#define IOP_G_FIRST (0x01 << 1) + +#define SPPCTL_PCTL_G_PMUX (0x00 | IOP_G_MASTE) +#define SPPCTL_PCTL_G_GPIO (IOP_G_FIRST | IOP_G_MASTE) +#define SPPCTL_PCTL_G_IOPP (IOP_G_FIRST | 0x00) + +#define SPPCTL_PCTL_L_OUT (0x01 << 0) /* Output LOW */ +#define SPPCTL_PCTL_L_OU1 (0x01 << 1) /* Output HIGH */ +#define SPPCTL_PCTL_L_INV (0x01 << 2) /* Input Invert */ +#define SPPCTL_PCTL_L_ONV (0x01 << 3) /* Output Invert */ +#define SPPCTL_PCTL_L_ODR (0x01 << 4) /* Output Open Drain */ + +/* + * pack into 32-bit value: + * pin# (8bit), typ (8bit), function (8bit), flag (8bit) + */ +#define SPPCTL_IOPAD(pin, typ, fun, flg) (((pin) << 24) | ((typ) << 16) | \ + ((fun) << 8) | (flg)) + +#endif |