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[src/netbsd-8]: src/sys/arch/x86/acpi Pull up following revision(s) (requeste...
details: https://anonhg.NetBSD.org/src/rev/8e91b3678450
branches: netbsd-8
changeset: 434949:8e91b3678450
user: martin <martin%NetBSD.org@localhost>
date: Fri May 04 16:07:59 2018 +0000
description:
Pull up following revision(s) (requested by maya in ticket #784):
sys/arch/x86/acpi/acpi_wakeup.c: revision 1.46
Save and restore xcr0 when doing ACPI sleeps. Should fix PR/49174.
diffstat:
sys/arch/x86/acpi/acpi_wakeup.c | 24 ++++++++++++++++++++++--
1 files changed, 22 insertions(+), 2 deletions(-)
diffs (78 lines):
diff -r 7f0d88b7f35d -r 8e91b3678450 sys/arch/x86/acpi/acpi_wakeup.c
--- a/sys/arch/x86/acpi/acpi_wakeup.c Fri May 04 16:03:32 2018 +0000
+++ b/sys/arch/x86/acpi/acpi_wakeup.c Fri May 04 16:07:59 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi_wakeup.c,v 1.45 2016/10/20 16:05:04 maxv Exp $ */
+/* $NetBSD: acpi_wakeup.c,v 1.45.8.1 2018/05/04 16:07:59 martin Exp $ */
/*-
* Copyright (c) 2002, 2011 The NetBSD Foundation, Inc.
@@ -59,7 +59,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_wakeup.c,v 1.45 2016/10/20 16:05:04 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_wakeup.c,v 1.45.8.1 2018/05/04 16:07:59 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -250,6 +250,7 @@
void
acpi_cpu_sleep(struct cpu_info *ci)
{
+ uint64_t xcr0 = 0;
int s;
KASSERT(!CPU_IS_PRIMARY(ci));
@@ -259,12 +260,21 @@
fpusave_cpu(true);
x86_disable_intr();
+ /*
+ * XXX also need to save the PMCs, the dbregs, and probably a few
+ * MSRs too.
+ */
+ if (rcr4() & CR4_OSXSAVE)
+ xcr0 = rdxcr(0);
+
if (acpi_md_sleep_prepare(-1))
goto out;
/* Execute Wakeup */
cpu_init_msrs(ci, false);
fpuinit(ci);
+ if (rcr4() & CR4_OSXSAVE)
+ wrxcr(0, xcr0);
#if NLAPIC > 0
lapic_enable();
@@ -285,6 +295,7 @@
int
acpi_md_sleep(int state)
{
+ uint64_t xcr0 = 0;
int s, ret = 0;
#ifdef MULTIPROCESSOR
struct cpu_info *ci;
@@ -315,12 +326,21 @@
}
#endif
+ /*
+ * XXX also need to save the PMCs, the dbregs, and probably a few
+ * MSRs too.
+ */
+ if (rcr4() & CR4_OSXSAVE)
+ xcr0 = rdxcr(0);
+
if (acpi_md_sleep_prepare(state))
goto out;
/* Execute Wakeup */
cpu_init_msrs(&cpu_info_primary, false);
fpuinit(&cpu_info_primary);
+ if (rcr4() & CR4_OSXSAVE)
+ wrxcr(0, xcr0);
i8259_reinit();
#if NLAPIC > 0
lapic_enable();
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