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Date:      Tue, 8 May 2018 10:56:06 +0000 (UTC)
From:      Konstantin Belousov <kib@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org
Subject:   svn commit: r333361 - in stable/11/sys/x86: acpica include
Message-ID:  <201805081056.w48Au6Tw045279@repo.freebsd.org>
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Author: kib
Date: Tue May  8 10:56:06 2018
New Revision: 333361
URL: https://svnweb.freebsd.org/changeset/base/333361

Log:
  MFC r333125:
  Turn off IBRS on suspend.
  
  Approved by:	re (marius)

Modified:
  stable/11/sys/x86/acpica/acpi_wakeup.c
  stable/11/sys/x86/include/x86_var.h
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/x86/acpica/acpi_wakeup.c
==============================================================================
--- stable/11/sys/x86/acpica/acpi_wakeup.c	Tue May  8 10:18:24 2018	(r333360)
+++ stable/11/sys/x86/acpica/acpi_wakeup.c	Tue May  8 10:56:06 2018	(r333361)
@@ -190,6 +190,10 @@ acpi_sleep_machdep(struct acpi_softc *sc, int state)
 {
 	ACPI_STATUS	status;
 	struct pcb	*pcb;
+#ifdef __amd64__
+	struct pcpu *pc;
+	int i;
+#endif
 
 	if (sc->acpi_wakeaddr == 0ul)
 		return (-1);	/* couldn't alloc wake memory */
@@ -217,6 +221,14 @@ acpi_sleep_machdep(struct acpi_softc *sc, int state)
 		if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
 			device_printf(sc->acpi_dev, "Failed to suspend APs\n");
 			return (0);	/* couldn't sleep */
+		}
+#endif
+#ifdef __amd64__
+		hw_ibrs_active = 0;
+		cpu_stdext_feature3 = 0;
+		CPU_FOREACH(i) {
+			pc = pcpu_find(i);
+			pc->pc_ibpb_set = 0;
 		}
 #endif
 

Modified: stable/11/sys/x86/include/x86_var.h
==============================================================================
--- stable/11/sys/x86/include/x86_var.h	Tue May  8 10:18:24 2018	(r333360)
+++ stable/11/sys/x86/include/x86_var.h	Tue May  8 10:56:06 2018	(r333361)
@@ -81,7 +81,8 @@ extern	int	_ufssel;
 extern	int	_ugssel;
 extern	int	use_xsave;
 extern	uint64_t xsave_mask;
-extern int	pti;
+extern	int	pti;
+extern	int	hw_ibrs_active;
 
 struct	pcb;
 struct	thread;

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