diff options
| author | Andrew Turner <andrew@FreeBSD.org> | 2026-05-18 09:01:19 +0000 |
|---|---|---|
| committer | Andrew Turner <andrew@FreeBSD.org> | 2026-05-27 15:22:25 +0000 |
| commit | d63a62fb3504df36457cac5718073a12d10e6cdc (patch) | |
| tree | 3e6cc65d71f54fbad2ad67473bd606feeac435db | |
| parent | 5cb511e62763621cf7672db4294002411c3e897d (diff) | |
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
| -rw-r--r-- | sys/arm64/arm64/pmap.c | 1 | ||||
| -rw-r--r-- | sys/arm64/include/pmap.h | 3 |
2 files changed, 3 insertions, 1 deletions
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 { |