The branch main has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=21fc6a2a10cf6fbd294decbb0001473693ec1618
commit 21fc6a2a10cf6fbd294decbb0001473693ec1618
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2021-04-16 18:28:08 +0000
Commit: Konstantin Belousov <k...@freebsd.org>
CommitDate: 2021-04-30 14:43:45 +0000
amd64: invalidate TLB between page table update and access
When setting up trampoline mapping for LA57 switcher, it is possible
that TLB still has some random mapping at that address.
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
---
sys/amd64/amd64/pmap.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 66617bffa8df..5a6a1cee8b8c 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -2168,6 +2168,7 @@ pmap_bootstrap_la57(void *arg __unused)
*(u_long *)(v_code + 2 + (la57_trampoline_gdt_desc - la57_trampoline)) =
la57_trampoline_gdt - la57_trampoline + VM_PAGE_TO_PHYS(m_code);
la57_tramp = (void (*)(uint64_t))VM_PAGE_TO_PHYS(m_code);
+ invlpg((vm_offset_t)la57_tramp);
la57_tramp(KPML5phys);
/*
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