git: 678bc2281c37 - main - la57: do not set global bit for PML5 entry
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Date: Mon, 16 Sep 2024 08:15:11 UTC
The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=678bc2281c3727e920604545240d9115de3d1bd3 commit 678bc2281c3727e920604545240d9115de3d1bd3 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2024-09-14 17:15:51 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2024-09-16 08:13:51 +0000 la57: do not set global bit for PML5 entry The bit is reserved for PLM5, causing #PF on KVA access on real hardware, unlike QEMU. Sponsored by: Advanced Micro Devices (AMD) Sponsored by: The FreeBSD Foundation MFC after: 1 week --- sys/amd64/amd64/pmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index b513c0c9c957..eadcb726b6c2 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -2226,7 +2226,7 @@ pmap_bootstrap_la57(void *arg __unused) * entering all existing kernel mappings into level 5 table. */ v_pml5[pmap_pml5e_index(UPT_MAX_ADDRESS)] = KPML4phys | X86_PG_V | - X86_PG_RW | X86_PG_A | X86_PG_M | pg_g; + X86_PG_RW | X86_PG_A | X86_PG_M; /* * Add pml5 entry for 1:1 trampoline mapping after LA57 is turned on.