git: 15964f1cb393 - main - amd64 pmap: preset A and M bits for pmap_qenter() and pmap_kenter() mappings

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=15964f1cb3935b612c833b863219fef0a3932edf

commit 15964f1cb3935b612c833b863219fef0a3932edf
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2022-01-05 01:25:41 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2022-01-08 04:34:18 +0000

    amd64 pmap: preset A and M bits for pmap_qenter() and pmap_kenter() mappings
    
    This removes one or two atomic update of the pte on access. Also it
    makes the pte constant during its lifecycle.
    
    Reviewed by:    alc, markj
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D33778
---
 sys/amd64/amd64/pmap.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 8b5d58c2a540..5f72ff3acf08 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -3897,7 +3897,8 @@ pmap_kenter(vm_offset_t va, vm_paddr_t pa)
 	pt_entry_t *pte;
 
 	pte = vtopte(va);
-	pte_store(pte, pa | X86_PG_RW | X86_PG_V | pg_g | pg_nx);
+	pte_store(pte, pa | pg_g | pg_nx | X86_PG_A | X86_PG_M |
+	    X86_PG_RW | X86_PG_V);
 }
 
 static __inline void
@@ -3908,7 +3909,8 @@ pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, int mode)
 
 	pte = vtopte(va);
 	cache_bits = pmap_cache_bits(kernel_pmap, mode, 0);
-	pte_store(pte, pa | X86_PG_RW | X86_PG_V | pg_g | pg_nx | cache_bits);
+	pte_store(pte, pa | pg_g | pg_nx | X86_PG_A | X86_PG_M |
+	    X86_PG_RW | X86_PG_V | cache_bits);
 }
 
 /*
@@ -3967,7 +3969,8 @@ pmap_qenter(vm_offset_t sva, vm_page_t *ma, int count)
 		pa = VM_PAGE_TO_PHYS(m) | cache_bits;
 		if ((*pte & (PG_FRAME | X86_PG_PTE_CACHE)) != pa) {
 			oldpte |= *pte;
-			pte_store(pte, pa | pg_g | pg_nx | X86_PG_RW | X86_PG_V);
+			pte_store(pte, pa | pg_g | pg_nx | X86_PG_A |
+			    X86_PG_M | X86_PG_RW | X86_PG_V);
 		}
 		pte++;
 	}