Mitchell Horne ccbe9a9f73 riscv: T-HEAD PBMT support ... T-HEAD CPUs provide a spec-violating implementation of page-based memory types, using PTE bits [63:59]. Add basic support for this "errata", referred to in some places as an "extension". Note that this change is not enough on its own, but a workaround is needed for the bootstrap (locore) page tables as well. Reviewed by: jhb Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D45472		2024-11-25 17:08:04 -04:00
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thead.c