From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: [PATCH 4.4 22/50] s390: move nobp parameter functions to nospec-branch.c
Date: Fri, 27 Apr 2018 15:58:24 +0200 [thread overview]
Message-ID: <20180427135657.034170807@linuxfoundation.org> (raw)
In-Reply-To: <20180427135655.623669681@linuxfoundation.org>
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
[ Upstream commit b2e2f43a01bace1a25bdbae04c9f9846882b727a ]
Keep the code for the nobp parameter handling with the code for
expolines. Both are related to the spectre v2 mitigation.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/s390/kernel/Makefile | 4 ++--
arch/s390/kernel/alternative.c | 23 -----------------------
arch/s390/kernel/nospec-branch.c | 27 +++++++++++++++++++++++++++
3 files changed, 29 insertions(+), 25 deletions(-)
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -45,11 +45,11 @@ obj-y += debug.o irq.o ipl.o dis.o diag.
obj-y += sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o
obj-y += runtime_instr.o cache.o dumpstack.o
obj-y += entry.o reipl.o relocate_kernel.o alternative.o
+obj-y += nospec-branch.o
extra-y += head.o head64.o vmlinux.lds
-obj-$(CONFIG_EXPOLINE) += nospec-branch.o
-CFLAGS_REMOVE_expoline.o += $(CC_FLAGS_EXPOLINE)
+CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE)
obj-$(CONFIG_MODULES) += s390_ksyms.o module.o
obj-$(CONFIG_SMP) += smp.o
--- a/arch/s390/kernel/alternative.c
+++ b/arch/s390/kernel/alternative.c
@@ -14,29 +14,6 @@ static int __init disable_alternative_in
early_param("noaltinstr", disable_alternative_instructions);
-static int __init nobp_setup_early(char *str)
-{
- bool enabled;
- int rc;
-
- rc = kstrtobool(str, &enabled);
- if (rc)
- return rc;
- if (enabled && test_facility(82))
- __set_facility(82, S390_lowcore.alt_stfle_fac_list);
- else
- __clear_facility(82, S390_lowcore.alt_stfle_fac_list);
- return 0;
-}
-early_param("nobp", nobp_setup_early);
-
-static int __init nospec_setup_early(char *str)
-{
- __clear_facility(82, S390_lowcore.alt_stfle_fac_list);
- return 0;
-}
-early_param("nospec", nospec_setup_early);
-
struct brcl_insn {
u16 opc;
s32 disp;
--- a/arch/s390/kernel/nospec-branch.c
+++ b/arch/s390/kernel/nospec-branch.c
@@ -3,6 +3,31 @@
#include <asm/facility.h>
#include <asm/nospec-branch.h>
+static int __init nobp_setup_early(char *str)
+{
+ bool enabled;
+ int rc;
+
+ rc = kstrtobool(str, &enabled);
+ if (rc)
+ return rc;
+ if (enabled && test_facility(82))
+ __set_facility(82, S390_lowcore.alt_stfle_fac_list);
+ else
+ __clear_facility(82, S390_lowcore.alt_stfle_fac_list);
+ return 0;
+}
+early_param("nobp", nobp_setup_early);
+
+static int __init nospec_setup_early(char *str)
+{
+ __clear_facility(82, S390_lowcore.alt_stfle_fac_list);
+ return 0;
+}
+early_param("nospec", nospec_setup_early);
+
+#ifdef CONFIG_EXPOLINE
+
int nospec_call_disable = IS_ENABLED(CONFIG_EXPOLINE_OFF);
int nospec_return_disable = !IS_ENABLED(CONFIG_EXPOLINE_FULL);
@@ -99,3 +124,5 @@ void __init nospec_init_branches(void)
nospec_call_revert(__nospec_call_start, __nospec_call_end);
nospec_return_revert(__nospec_return_start, __nospec_return_end);
}
+
+#endif /* CONFIG_EXPOLINE */
next prev parent reply other threads:[~2018-04-27 13:58 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-27 13:58 [PATCH 4.4 00/50] 4.4.130-stable review Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 01/50] cifs: do not allow creating sockets except with SMB1 posix exensions Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 02/50] x86/tsc: Prevent 32bit truncation in calc_hpet_ref() Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 03/50] perf: Return proper values for user stack errors Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 04/50] staging: ion : Donnot wakeup kswapd in ion system alloc Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 05/50] r8152: add Linksys USB3GIGV1 id Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 06/50] Input: drv260x - fix initializing overdrive voltage Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 07/50] ath9k_hw: check if the chip failed to wake up Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 08/50] jbd2: fix use after free in kjournald2() Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 09/50] Revert "ath10k: send (re)assoc peer command when NSS changed" Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 10/50] s390: introduce CPU alternatives Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 11/50] s390: enable CPU alternatives unconditionally Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 12/50] KVM: s390: wire up bpb feature Greg Kroah-Hartman
2018-04-27 15:10 ` Christian Borntraeger
2018-04-27 15:17 ` Greg Kroah-Hartman
2018-04-27 15:46 ` Greg Kroah-Hartman
2018-04-27 15:53 ` Christian Borntraeger
2018-04-29 7:51 ` Martin Schwidefsky
2018-04-30 18:17 ` Greg Kroah-Hartman
2018-04-30 18:30 ` Christian Borntraeger
2018-04-27 13:58 ` [PATCH 4.4 13/50] s390: scrub registers on kernel entry and KVM exit Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 14/50] s390: add optimized array_index_mask_nospec Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 15/50] s390/alternative: use a copy of the facility bit mask Greg Kroah-Hartman
2018-05-04 7:37 ` Jiri Slaby
2018-05-04 7:41 ` Jiri Slaby
2018-05-04 22:18 ` Greg Kroah-Hartman
2018-05-07 6:07 ` Martin Schwidefsky
2018-05-08 7:20 ` Greg Kroah-Hartman
2018-05-12 19:44 ` Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 16/50] s390: add options to change branch prediction behaviour for the kernel Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 17/50] s390: run user space and KVM guests with modified branch prediction Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 18/50] s390: introduce execute-trampolines for branches Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 19/50] s390: Replace IS_ENABLED(EXPOLINE_*) with IS_ENABLED(CONFIG_EXPOLINE_*) Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 20/50] s390: do not bypass BPENTER for interrupt system calls Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 21/50] s390/entry.S: fix spurious zeroing of r0 Greg Kroah-Hartman
2018-04-27 13:58 ` Greg Kroah-Hartman [this message]
2018-04-27 13:58 ` [PATCH 4.4 23/50] s390: add automatic detection of the spectre defense Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 24/50] s390: report spectre mitigation via syslog Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 25/50] s390: add sysfs attributes for spectre Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 26/50] s390: correct nospec auto detection init order Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 27/50] s390: correct module section names for expoline code revert Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 28/50] bonding: do not set slave_dev npinfo before slave_enable_netpoll in bond_enslave Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 29/50] KEYS: DNS: limit the length of option strings Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 30/50] l2tp: check sockaddr length in pppol2tp_connect() Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 31/50] net: validate attribute sizes in neigh_dump_table() Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 32/50] llc: delete timers synchronously in llc_sk_free() Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 33/50] tcp: dont read out-of-bounds opsize Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 34/50] team: avoid adding twice the same option to the event list Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 35/50] team: fix netconsole setup over team Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 36/50] packet: fix bitfield update race Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 37/50] pppoe: check sockaddr length in pppoe_connect() Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 38/50] vlan: Fix reading memory beyond skb->tail in skb_vlan_tagged_multi Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 39/50] sctp: do not check port in sctp_inet6_cmp_addr Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 40/50] llc: hold llc_sap before release_sock() Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 41/50] llc: fix NULL pointer deref for SOCK_ZAPPED Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 42/50] tipc: add policy for TIPC_NLA_NET_ADDR Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 43/50] net: fix deadlock while clearing neighbor proxy table Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 44/50] tcp: md5: reject TCP_MD5SIG or TCP_MD5SIG_EXT on established sockets Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 45/50] net: af_packet: fix race in PACKET_{R|T}X_RING Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 46/50] ipv6: add RTA_TABLE and RTA_PREFSRC to rtm_ipv6_policy Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 47/50] scsi: mptsas: Disable WRITE SAME Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 48/50] cdrom: information leak in cdrom_ioctl_media_changed() Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 49/50] s390/cio: update chpid descriptor after resource accessibility event Greg Kroah-Hartman
2018-04-27 13:58 ` [PATCH 4.4 50/50] s390/uprobes: implement arch_uretprobe_is_alive() Greg Kroah-Hartman
2018-04-27 18:15 ` [PATCH 4.4 00/50] 4.4.130-stable review Shuah Khan
2018-04-27 18:57 ` Nathan Chancellor
2018-04-27 19:43 ` kernelci.org bot
2018-04-27 20:31 ` Dan Rue
2018-04-28 14:25 ` Guenter Roeck
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