The branch main has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=3a94bbfdcd09c655031e2a1ae343af6292d97d5d
commit 3a94bbfdcd09c655031e2a1ae343af6292d97d5d
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2025-05-30 21:58:33 +0000
Commit: Konstantin Belousov <k...@freebsd.org>
CommitDate: 2025-05-31 14:55:24 +0000
amd64: Add AMD64_DISABLE_TLSBASE
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
---
sys/amd64/amd64/sys_machdep.c | 6 ++++++
sys/x86/include/sysarch.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/sys/amd64/amd64/sys_machdep.c b/sys/amd64/amd64/sys_machdep.c
index 6deebba5babc..51f55687bbcf 100644
--- a/sys/amd64/amd64/sys_machdep.c
+++ b/sys/amd64/amd64/sys_machdep.c
@@ -208,6 +208,7 @@ sysarch(struct thread *td, struct sysarch_args *uap)
case AMD64_CLEAR_PKRU:
case AMD64_GET_TLSBASE:
case AMD64_SET_TLSBASE:
+ case AMD64_DISABLE_TLSBASE:
break;
case I386_SET_IOPERM:
@@ -395,6 +396,11 @@ sysarch(struct thread *td, struct sysarch_args *uap)
vm_map_unlock_read(map);
break;
+ case AMD64_DISABLE_TLSBASE:
+ clear_pcb_flags(pcb, PCB_TLSBASE);
+ update_pcb_bases(pcb);
+ break;
+
default:
error = EINVAL;
break;
diff --git a/sys/x86/include/sysarch.h b/sys/x86/include/sysarch.h
index a67e5c2265a3..cf7ee9ee5518 100644
--- a/sys/x86/include/sysarch.h
+++ b/sys/x86/include/sysarch.h
@@ -63,6 +63,7 @@
#define AMD64_CLEAR_PKRU 134
#define AMD64_GET_TLSBASE 135
#define AMD64_SET_TLSBASE 136
+#define AMD64_DISABLE_TLSBASE 137
/* Flags for AMD64_SET_PKRU */
#define AMD64_PKRU_EXCL 0x0001
