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/video/omapvrfb.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 include/video/omapvrfb.h (limited to 'include/video/omapvrfb.h') diff --git a/include/video/omapvrfb.h b/include/video/omapvrfb.h new file mode 100644 index 000000000..9741e77f1 --- /dev/null +++ b/include/video/omapvrfb.h @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * VRFB Rotation Engine + * + * Copyright (C) 2009 Nokia Corporation + * Author: Tomi Valkeinen + */ + +#ifndef __OMAP_VRFB_H__ +#define __OMAP_VRFB_H__ + +#define OMAP_VRFB_LINE_LEN 2048 + +struct vrfb { + u8 context; + void __iomem *vaddr[4]; + unsigned long paddr[4]; + u16 xres; + u16 yres; + u16 xoffset; + u16 yoffset; + u8 bytespp; + bool yuv_mode; +}; + +#ifdef CONFIG_OMAP2_VRFB +extern bool omap_vrfb_supported(void); +extern int omap_vrfb_request_ctx(struct vrfb *vrfb); +extern void omap_vrfb_release_ctx(struct vrfb *vrfb); +extern void omap_vrfb_adjust_size(u16 *width, u16 *height, + u8 bytespp); +extern u32 omap_vrfb_min_phys_size(u16 width, u16 height, u8 bytespp); +extern u16 omap_vrfb_max_height(u32 phys_size, u16 width, u8 bytespp); +extern void omap_vrfb_setup(struct vrfb *vrfb, unsigned long paddr, + u16 width, u16 height, + unsigned bytespp, bool yuv_mode); +extern int omap_vrfb_map_angle(struct vrfb *vrfb, u16 height, u8 rot); +extern void omap_vrfb_restore_context(void); + +#else +static inline bool omap_vrfb_supported(void) { return false; } +static inline int omap_vrfb_request_ctx(struct vrfb *vrfb) { return 0; } +static inline void omap_vrfb_release_ctx(struct vrfb *vrfb) {} +static inline void omap_vrfb_adjust_size(u16 *width, u16 *height, + u8 bytespp) {} +static inline u32 omap_vrfb_min_phys_size(u16 width, u16 height, u8 bytespp) + { return 0; } +static inline u16 omap_vrfb_max_height(u32 phys_size, u16 width, u8 bytespp) + { return 0; } +static inline void omap_vrfb_setup(struct vrfb *vrfb, unsigned long paddr, + u16 width, u16 height, unsigned bytespp, bool yuv_mode) {} +static inline int omap_vrfb_map_angle(struct vrfb *vrfb, u16 height, u8 rot) + { return 0; } +static inline void omap_vrfb_restore_context(void) {} +#endif +#endif /* __VRFB_H */ -- cgit v1.3.1