svn commit: r303923 - head/sys/arm64/arm64

[Ed Schouten]

Author: ed
Date: Wed Aug 10 15:45:25 2016
New Revision: 303923
URL: https://svnweb.freebsd.org/changeset/base/303923

Log:
  Make cpu_set_user_tls() work when called on the running thread.
  
  On all the other architectures, this function can also be called on the
  currently running thread. In this case, we shouldn't fix up the address
  in the PCB, but also patch up the register itself. Otherwise it will not
  become active and will simply become overwritten by the next switch.
  
  Reviewed by:	imp
  MFC after:	1 week
  Differential Revision:	https://reviews.freebsd.org/D7437

Modified:
  head/sys/arm64/arm64/vm_machdep.c

Modified: head/sys/arm64/arm64/vm_machdep.c
==============================================================================
--- head/sys/arm64/arm64/vm_machdep.c	Wed Aug 10 15:25:44 2016	(r303922)
+++ head/sys/arm64/arm64/vm_machdep.c	Wed Aug 10 15:45:25 2016	(r303923)
@@ -201,6 +201,8 @@ cpu_set_user_tls(struct thread *td, void
 
 	pcb = td->td_pcb;
 	pcb->pcb_tpidr_el0 = (register_t)tls_base;
+	if (td == curthread)
+		WRITE_SPECIALREG(tpidr_el0, tls_base);
 
 	return (0);
 }