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[src/netbsd-8]: src Pull up following revision(s) (requested by mrg in ticket...
details: https://anonhg.NetBSD.org/src/rev/4f7260df53d4
branches: netbsd-8
changeset: 851612:4f7260df53d4
user: martin <martin%NetBSD.org@localhost>
date: Wed Apr 11 14:23:30 2018 +0000
description:
Pull up following revision(s) (requested by mrg in ticket #731):
sys/arch/i386/conf/files.i386: revision 1.392
sys/arch/i386/conf/GENERIC: revision 1.1175
sys/arch/i386/conf/GENERIC: revision 1.1176
sys/arch/amd64/conf/files.amd64: revision 1.102
sys/arch/i386/conf/GENERIC: revision 1.1177
share/man/man4/options.4: revision 1.485 (patch)
sys/arch/i386/conf/Makefile.i386: revision 1.190
sys/arch/amd64/conf/GENERIC: revision 1.487
sys/arch/amd64/conf/ALL: revision 1.85
sys/arch/amd64/conf/GENERIC: revision 1.488
sys/arch/amd64/conf/GENERIC: revision 1.489
sys/arch/amd64/conf/Makefile.amd64: revision 1.67
sys/arch/i386/conf/ALL: revision 1.437
add an SPECTRE_V2_GCC_MITIGATION option to x86 kernels, that turns
on the GCC spectre v2 mitigation options.
XXX: pullup-8.
XXX: turn on in all kernels.
actually do what the previous change said:
don't turn on the new 'SPECTRE_V2_GCC_MITIGATION' option yet.
turn on GCC spectre v2 mitigation options.
XXX: amd64 ALL doesn't build for me right now
diffstat:
share/man/man4/options.4 | 15 ++++++++++++++-
sys/arch/amd64/conf/ALL | 6 ++++--
sys/arch/amd64/conf/GENERIC | 6 ++++--
sys/arch/amd64/conf/Makefile.amd64 | 7 ++++++-
sys/arch/amd64/conf/files.amd64 | 5 ++++-
sys/arch/i386/conf/ALL | 6 ++++--
sys/arch/i386/conf/GENERIC | 6 ++++--
sys/arch/i386/conf/Makefile.i386 | 7 ++++++-
sys/arch/i386/conf/files.i386 | 5 ++++-
9 files changed, 50 insertions(+), 13 deletions(-)
diffs (231 lines):
diff -r 0f0daede1bba -r 4f7260df53d4 share/man/man4/options.4
--- a/share/man/man4/options.4 Wed Apr 11 14:15:45 2018 +0000
+++ b/share/man/man4/options.4 Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: options.4,v 1.466 2017/05/19 14:18:41 abhinav Exp $
+.\" $NetBSD: options.4,v 1.466.2.1 2018/04/11 14:23:30 martin Exp $
.\"
.\" Copyright (c) 1996
.\" Perry E. Metzger. All rights reserved.
@@ -31,6 +31,7 @@
.\"
.\"
.Dd March 9, 2017
+.Dd April 5, 2018
.Dt OPTIONS 4
.Os
.Sh NAME
@@ -2549,6 +2550,17 @@
This is correct behavior, and you should not use the
.Em REALBASEMEM
option to access this memory).
+.It Cd options SPECTRE_V2_GCC_MITIGATION=1
+Enable GCC-specific Spectre variant 2 mitigations.
+For 32-bit kernels this means these options:
+.Bd -literal -offset indent
+-mindirect-branch=thunk -mindirect-branch-register
+.Ed
+.Pp
+For 64-bit kernels this means these options:
+.Bd -literal -offset indent
+-mindirect-branch=thunk-inline -mindirect-branch-register
+.Ed
.It Cd options REALEXTMEM=integer
Overrides the extended memory size passed in from the boot block.
(Value given in kilobytes.
@@ -2786,6 +2798,7 @@
.\" .Sh EXAMPLES
.Sh SEE ALSO
.Xr config 1 ,
+.Xr gcc 1 ,
.Xr gdb 1 ,
.Xr ktrace 1 ,
.Xr pmc 1 ,
diff -r 0f0daede1bba -r 4f7260df53d4 sys/arch/amd64/conf/ALL
--- a/sys/arch/amd64/conf/ALL Wed Apr 11 14:15:45 2018 +0000
+++ b/sys/arch/amd64/conf/ALL Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: ALL,v 1.59.2.4 2018/04/09 12:49:32 bouyer Exp $
+# $NetBSD: ALL,v 1.59.2.5 2018/04/11 14:23:30 martin Exp $
# From NetBSD: GENERIC,v 1.787 2006/10/01 18:37:54 bouyer Exp
#
# ALL machine description file
@@ -17,7 +17,7 @@
options INCLUDE_CONFIG_FILE # embed config file in kernel binary
-#ident "ALL-$Revision: 1.59.2.4 $"
+#ident "ALL-$Revision: 1.59.2.5 $"
maxusers 64 # estimated number of users
@@ -28,6 +28,8 @@
#options USER_LDT # user-settable LDT; used by WINE
options X86EMU # 386 Real Mode emulator
#options PAE # PAE mode (36 bits physical addressing)
+makeoptions SPECTRE_V2_GCC_MITIGATION=1 # GCC Spectre variant 2
+ # migitation
# CPU features
acpicpu* at cpu? # ACPI CPU (including frequency scaling)
diff -r 0f0daede1bba -r 4f7260df53d4 sys/arch/amd64/conf/GENERIC
--- a/sys/arch/amd64/conf/GENERIC Wed Apr 11 14:15:45 2018 +0000
+++ b/sys/arch/amd64/conf/GENERIC Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: GENERIC,v 1.459.2.7 2018/04/04 16:25:23 martin Exp $
+# $NetBSD: GENERIC,v 1.459.2.8 2018/04/11 14:23:30 martin Exp $
#
# GENERIC machine description file
#
@@ -22,7 +22,7 @@
options INCLUDE_CONFIG_FILE # embed config file in kernel binary
-#ident "GENERIC-$Revision: 1.459.2.7 $"
+#ident "GENERIC-$Revision: 1.459.2.8 $"
maxusers 64 # estimated number of users
@@ -75,6 +75,8 @@
# CPU-related options
options SVS # Separate Virtual Space
+makeoptions SPECTRE_V2_GCC_MITIGATION=1 # GCC Spectre variant 2
+ # migitation
# CPU features
acpicpu* at cpu? # ACPI CPU (including frequency scaling)
diff -r 0f0daede1bba -r 4f7260df53d4 sys/arch/amd64/conf/Makefile.amd64
--- a/sys/arch/amd64/conf/Makefile.amd64 Wed Apr 11 14:15:45 2018 +0000
+++ b/sys/arch/amd64/conf/Makefile.amd64 Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.amd64,v 1.57 2017/02/11 16:02:11 maxv Exp $
+# $NetBSD: Makefile.amd64,v 1.57.6.1 2018/04/11 14:23:30 martin Exp $
# Makefile for NetBSD
#
@@ -43,6 +43,11 @@
# For gcc we might need this, but other compilers barf
# CFLAGS+= -mno-fp-ret-in-387
+.if !empty(SPECTRE_V2_GCC_MITIGATION) && ${HAVE_GCC:U0} > 0
+CFLAGS+= -mindirect-branch=thunk-inline
+CFLAGS+= -mindirect-branch-register
+.endif
+
##
## (3) libkern and compat
##
diff -r 0f0daede1bba -r 4f7260df53d4 sys/arch/amd64/conf/files.amd64
--- a/sys/arch/amd64/conf/files.amd64 Wed Apr 11 14:15:45 2018 +0000
+++ b/sys/arch/amd64/conf/files.amd64 Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.amd64,v 1.88.8.2 2018/03/07 14:50:57 martin Exp $
+# $NetBSD: files.amd64,v 1.88.8.3 2018/04/11 14:23:30 martin Exp $
#
# new style config file for amd64 architecture
#
@@ -19,6 +19,9 @@
# The PHYSMEM_MAX_{SIZE,ADDR} optionms
defparam opt_physmem.h PHYSMEM_MAX_ADDR PHYSMEM_MAX_SIZE
+# Enable GCC spectre V2 mitigation options
+defflag opt_spectre.h SPECTRE_V2_GCC_MITIGATION
+
#
# XXX these are just here at the moment so that we can share files
# with the i386 (they include the opt_*.h for these)
diff -r 0f0daede1bba -r 4f7260df53d4 sys/arch/i386/conf/ALL
--- a/sys/arch/i386/conf/ALL Wed Apr 11 14:15:45 2018 +0000
+++ b/sys/arch/i386/conf/ALL Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: ALL,v 1.419.2.2 2017/09/09 17:29:40 snj Exp $
+# $NetBSD: ALL,v 1.419.2.3 2018/04/11 14:23:30 martin Exp $
# From NetBSD: GENERIC,v 1.787 2006/10/01 18:37:54 bouyer Exp
#
# ALL machine description file
@@ -17,7 +17,7 @@
options INCLUDE_CONFIG_FILE # embed config file in kernel binary
-#ident "ALL-$Revision: 1.419.2.2 $"
+#ident "ALL-$Revision: 1.419.2.3 $"
maxusers 64 # estimated number of users
@@ -28,6 +28,8 @@
options USER_LDT # user-settable LDT; used by WINE
options X86EMU # 386 Real Mode emulator
options PAE # PAE mode (36 bits physical addressing)
+makeoptions SPECTRE_V2_GCC_MITIGATION=1 # GCC Spectre variant 2
+ # migitation
# CPU features
acpicpu* at cpu? # ACPI CPU (including frequency scaling)
diff -r 0f0daede1bba -r 4f7260df53d4 sys/arch/i386/conf/GENERIC
--- a/sys/arch/i386/conf/GENERIC Wed Apr 11 14:15:45 2018 +0000
+++ b/sys/arch/i386/conf/GENERIC Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: GENERIC,v 1.1156.2.7 2017/12/04 19:47:05 snj Exp $
+# $NetBSD: GENERIC,v 1.1156.2.8 2018/04/11 14:23:30 martin Exp $
#
# GENERIC machine description file
#
@@ -22,7 +22,7 @@
options INCLUDE_CONFIG_FILE # embed config file in kernel binary
-#ident "GENERIC-$Revision: 1.1156.2.7 $"
+#ident "GENERIC-$Revision: 1.1156.2.8 $"
maxusers 64 # estimated number of users
@@ -30,6 +30,8 @@
#options VM86 # virtual 8086 emulation
options USER_LDT # user-settable LDT; used by WINE
#options PAE # PAE mode (36 bits physical addressing)
+makeoptions SPECTRE_V2_GCC_MITIGATION=1 # GCC Spectre variant 2
+ # migitation
# CPU features
acpicpu* at cpu? # ACPI CPU (including frequency scaling)
diff -r 0f0daede1bba -r 4f7260df53d4 sys/arch/i386/conf/Makefile.i386
--- a/sys/arch/i386/conf/Makefile.i386 Wed Apr 11 14:15:45 2018 +0000
+++ b/sys/arch/i386/conf/Makefile.i386 Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.i386,v 1.185 2015/08/24 14:04:24 uebayasi Exp $
+# $NetBSD: Makefile.i386,v 1.185.10.1 2018/04/11 14:23:30 martin Exp $
# Makefile for NetBSD
#
@@ -39,6 +39,11 @@
## no-sse implies no-sse2 but not no-avx
CFLAGS+= -mno-mmx -mno-sse -mno-avx
+.if !empty(SPECTRE_V2_GCC_MITIGATION) && ${HAVE_GCC:U0} > 0
+CFLAGS+= -mindirect-branch=thunk
+CFLAGS+= -mindirect-branch-register
+.endif
+
##
## (3) libkern and compat
##
diff -r 0f0daede1bba -r 4f7260df53d4 sys/arch/i386/conf/files.i386
--- a/sys/arch/i386/conf/files.i386 Wed Apr 11 14:15:45 2018 +0000
+++ b/sys/arch/i386/conf/files.i386 Wed Apr 11 14:23:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.i386,v 1.378.6.1 2017/08/01 23:18:30 snj Exp $
+# $NetBSD: files.i386,v 1.378.6.2 2018/04/11 14:23:30 martin Exp $
#
# new style config file for i386 architecture
#
@@ -46,6 +46,9 @@
# splraise()/spllower() debug
defflag opt_spldebug.h SPLDEBUG
+# Enable GCC spectre V2 mitigation options
+defflag opt_spectre.h SPECTRE_V2_GCC_MITIGATION
+
# Beep on halt
defflag opt_beep.h BEEP_ONHALT
defparam opt_beep.h BEEP_ONHALT_COUNT=3
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