The branch main has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=d63a62fb3504df36457cac5718073a12d10e6cdc
commit d63a62fb3504df36457cac5718073a12d10e6cdc Author: Andrew Turner <[email protected]> AuthorDate: 2026-05-18 09:01:19 +0000 Commit: Andrew Turner <[email protected]> CommitDate: 2026-05-27 15:22:25 +0000 arm64: Add support for per-page flags We need to store some extra information about a page, e.g. the state of the MTE tags. Add a MD flags field to each page. Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D55953 --- sys/arm64/arm64/pmap.c | 1 + sys/arm64/include/pmap.h | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c index fd4232711697..0aa1ee8d5801 100644 --- a/sys/arm64/arm64/pmap.c +++ b/sys/arm64/arm64/pmap.c @@ -1587,6 +1587,7 @@ pmap_page_init(vm_page_t m) TAILQ_INIT(&m->md.pv_list); m->md.pv_memattr = VM_MEMATTR_WRITE_BACK; + m->md.pv_flags = 0; } static void diff --git a/sys/arm64/include/pmap.h b/sys/arm64/include/pmap.h index 1d90e8d472f2..69ae8e5c80b7 100644 --- a/sys/arm64/include/pmap.h +++ b/sys/arm64/include/pmap.h @@ -70,7 +70,8 @@ struct md_page { TAILQ_HEAD(,pv_entry) pv_list; int pv_gen; vm_memattr_t pv_memattr; - uint8_t pv_reserve[3]; + uint8_t pv_flags; + uint8_t pv_reserve[2]; }; enum pmap_stage {
