The branch main has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=6799dd5dc133bd53fd69324500fe10d28a30abff
commit 6799dd5dc133bd53fd69324500fe10d28a30abff
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2025-06-28 06:35:49 +0000
Commit: Konstantin Belousov <k...@freebsd.org>
CommitDate: 2025-07-14 22:03:28 +0000
amd64 pmap: for la57, copy whole kernel pml5 table to user pmap pm_pml5
table
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D51085
---
sys/amd64/amd64/pmap.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index c5f3176f8c37..7de5daafa9f7 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -4343,21 +4343,13 @@ void
pmap_pinit_pml5(vm_page_t pml5pg)
{
pml5_entry_t *pm_pml5;
+ int i;
pm_pml5 = (pml5_entry_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(pml5pg));
-
- /*
- * Add pml5 entry at top of KVA pointing to existing pml4 table,
- * entering all existing kernel mappings into level 5 table.
- */
- pm_pml5[pmap_pml5e_index(UPT_MAX_ADDRESS)] = KPML4phys | X86_PG_V |
- X86_PG_RW | X86_PG_A | X86_PG_M;
-
- /*
- * Install self-referential address mapping entry.
- */
- pm_pml5[PML5PML5I] = VM_PAGE_TO_PHYS(pml5pg) |
- X86_PG_RW | X86_PG_V | X86_PG_M | X86_PG_A;
+ for (i = 0; i < NPML5EPG / 2; i++)
+ pm_pml5[i] = 0;
+ for (; i < NPML5EPG; i++)
+ pm_pml5[i] = kernel_pmap->pm_pmltop[i];
}
static void
