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Merge branch 'linus' into perf/core, to pick up fixes

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Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2018-05-25 08:02:43 +02:00
commit bd9c67ad96
410 changed files with 5891 additions and 2141 deletions
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8
Documentation/ABI/testing/sysfs-class-cxl
View File

@ -244,3 +244,11 @@ Description: read only
Returns 1 if the psl timebase register is synchronized
with the core timebase register, 0 otherwise.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/tunneled_ops_supported
Date: May 2018
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Returns 1 if tunneled operations are supported in capi mode,
0 otherwise.
Users: https://github.com/ibm-capi/libcxl

1
Documentation/ABI/testing/sysfs-devices-system-cpu
View File

@ -478,6 +478,7 @@ What: /sys/devices/system/cpu/vulnerabilities
/sys/devices/system/cpu/vulnerabilities/meltdown
/sys/devices/system/cpu/vulnerabilities/spectre_v1
/sys/devices/system/cpu/vulnerabilities/spectre_v2
/sys/devices/system/cpu/vulnerabilities/spec_store_bypass
Date: January 2018
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description: Information about CPU vulnerabilities

45
Documentation/admin-guide/kernel-parameters.txt
View File

@ -2680,6 +2680,9 @@
allow data leaks with this option, which is equivalent
to spectre_v2=off.
nospec_store_bypass_disable
[HW] Disable all mitigations for the Speculative Store Bypass vulnerability
noxsave [BUGS=X86] Disables x86 extended register state save
and restore using xsave. The kernel will fallback to
enabling legacy floating-point and sse state.
@ -4025,6 +4028,48 @@
Not specifying this option is equivalent to
spectre_v2=auto.
spec_store_bypass_disable=
[HW] Control Speculative Store Bypass (SSB) Disable mitigation
(Speculative Store Bypass vulnerability)
Certain CPUs are vulnerable to an exploit against a
a common industry wide performance optimization known
as "Speculative Store Bypass" in which recent stores
to the same memory location may not be observed by
later loads during speculative execution. The idea
is that such stores are unlikely and that they can
be detected prior to instruction retirement at the
end of a particular speculation execution window.
In vulnerable processors, the speculatively forwarded
store can be used in a cache side channel attack, for
example to read memory to which the attacker does not
directly have access (e.g. inside sandboxed code).
This parameter controls whether the Speculative Store
Bypass optimization is used.
on - Unconditionally disable Speculative Store Bypass
off - Unconditionally enable Speculative Store Bypass
auto - Kernel detects whether the CPU model contains an
implementation of Speculative Store Bypass and
picks the most appropriate mitigation. If the
CPU is not vulnerable, "off" is selected. If the
CPU is vulnerable the default mitigation is
architecture and Kconfig dependent. See below.
prctl - Control Speculative Store Bypass per thread
via prctl. Speculative Store Bypass is enabled
for a process by default. The state of the control
is inherited on fork.
seccomp - Same as "prctl" above, but all seccomp threads
will disable SSB unless they explicitly opt out.
Not specifying this option is equivalent to
spec_store_bypass_disable=auto.
Default mitigations:
X86: If CONFIG_SECCOMP=y "seccomp", otherwise "prctl"
spia_io_base= [HW,MTD]
spia_fio_base=
spia_pedr=

9
Documentation/devicetree/bindings/net/marvell-pp2.txt
View File

@ -21,9 +21,10 @@ Required properties:
- main controller clock (for both armada-375-pp2 and armada-7k-pp2)
- GOP clock (for both armada-375-pp2 and armada-7k-pp2)
- MG clock (only for armada-7k-pp2)
- MG Core clock (only for armada-7k-pp2)
- AXI clock (only for armada-7k-pp2)
- clock-names: names of used clocks, must be "pp_clk", "gop_clk", "mg_clk"
and "axi_clk" (the 2 latter only for armada-7k-pp2).
- clock-names: names of used clocks, must be "pp_clk", "gop_clk", "mg_clk",
"mg_core_clk" and "axi_clk" (the 3 latter only for armada-7k-pp2).
The ethernet ports are represented by subnodes. At least one port is
required.
@ -80,8 +81,8 @@ cpm_ethernet: ethernet@0 {
compatible = "marvell,armada-7k-pp22";
reg = <0x0 0x100000>, <0x129000 0xb000>;
clocks = <&cpm_syscon0 1 3>, <&cpm_syscon0 1 9>,
<&cpm_syscon0 1 5>, <&cpm_syscon0 1 18>;
clock-names = "pp_clk", "gop_clk", "gp_clk", "axi_clk";
<&cpm_syscon0 1 5>, <&cpm_syscon0 1 6>, <&cpm_syscon0 1 18>;
clock-names = "pp_clk", "gop_clk", "mg_clk", "mg_core_clk", "axi_clk";
eth0: eth0 {
interrupts = <ICU_GRP_NSR 39 IRQ_TYPE_LEVEL_HIGH>,

7
Documentation/devicetree/bindings/net/micrel-ksz90x1.txt
View File

@ -57,6 +57,13 @@ KSZ9031:
- txd2-skew-ps : Skew control of TX data 2 pad
- txd3-skew-ps : Skew control of TX data 3 pad
- micrel,force-master:
Boolean, force phy to master mode. Only set this option if the phy
reference clock provided at CLK125_NDO pin is used as MAC reference
clock because the clock jitter in slave mode is to high (errata#2).
Attention: The link partner must be configurable as slave otherwise
no link will be established.
Examples:
mdio {

1
Documentation/userspace-api/index.rst
View File

@ -19,6 +19,7 @@ place where this information is gathered.
no_new_privs
seccomp_filter
unshare
spec_ctrl
.. only:: subproject and html

94
Documentation/userspace-api/spec_ctrl.rst Normal file
View File

@ -0,0 +1,94 @@
===================
Speculation Control
===================
Quite some CPUs have speculation-related misfeatures which are in
fact vulnerabilities causing data leaks in various forms even across
privilege domains.
The kernel provides mitigation for such vulnerabilities in various
forms. Some of these mitigations are compile-time configurable and some
can be supplied on the kernel command line.
There is also a class of mitigations which are very expensive, but they can
be restricted to a certain set of processes or tasks in controlled
environments. The mechanism to control these mitigations is via
:manpage:`prctl(2)`.
There are two prctl options which are related to this:
* PR_GET_SPECULATION_CTRL
* PR_SET_SPECULATION_CTRL
PR_GET_SPECULATION_CTRL
-----------------------
PR_GET_SPECULATION_CTRL returns the state of the speculation misfeature
which is selected with arg2 of prctl(2). The return value uses bits 0-3 with
the following meaning:
==== ===================== ===================================================
Bit Define Description
==== ===================== ===================================================
0 PR_SPEC_PRCTL Mitigation can be controlled per task by
PR_SET_SPECULATION_CTRL.
1 PR_SPEC_ENABLE The speculation feature is enabled, mitigation is
disabled.
2 PR_SPEC_DISABLE The speculation feature is disabled, mitigation is
enabled.
3 PR_SPEC_FORCE_DISABLE Same as PR_SPEC_DISABLE, but cannot be undone. A
subsequent prctl(..., PR_SPEC_ENABLE) will fail.
==== ===================== ===================================================
If all bits are 0 the CPU is not affected by the speculation misfeature.
If PR_SPEC_PRCTL is set, then the per-task control of the mitigation is
available. If not set, prctl(PR_SET_SPECULATION_CTRL) for the speculation
misfeature will fail.
PR_SET_SPECULATION_CTRL
-----------------------
PR_SET_SPECULATION_CTRL allows to control the speculation misfeature, which
is selected by arg2 of :manpage:`prctl(2)` per task. arg3 is used to hand
in the control value, i.e. either PR_SPEC_ENABLE or PR_SPEC_DISABLE or
PR_SPEC_FORCE_DISABLE.
Common error codes
------------------
======= =================================================================
Value Meaning
======= =================================================================
EINVAL The prctl is not implemented by the architecture or unused
prctl(2) arguments are not 0.
ENODEV arg2 is selecting a not supported speculation misfeature.
======= =================================================================
PR_SET_SPECULATION_CTRL error codes
-----------------------------------
======= =================================================================
Value Meaning
======= =================================================================
0 Success
ERANGE arg3 is incorrect, i.e. it's neither PR_SPEC_ENABLE nor
PR_SPEC_DISABLE nor PR_SPEC_FORCE_DISABLE.
ENXIO Control of the selected speculation misfeature is not possible.
See PR_GET_SPECULATION_CTRL.
EPERM Speculation was disabled with PR_SPEC_FORCE_DISABLE and caller
tried to enable it again.
======= =================================================================
Speculation misfeature controls
-------------------------------
- PR_SPEC_STORE_BYPASS: Speculative Store Bypass
Invocations:
* prctl(PR_GET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, 0, 0, 0);
* prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_ENABLE, 0, 0);
* prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_DISABLE, 0, 0);
* prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_FORCE_DISABLE, 0, 0);

6
Documentation/virtual/kvm/cpuid.txt
View File

@ -72,8 +72,8 @@ KVM_FEATURE_CLOCKSOURCE_STABLE_BIT || 24 || host will warn if no guest-side
flag || value || meaning
==================================================================================
KVM_HINTS_DEDICATED || 0 || guest checks this feature bit to
|| || determine if there is vCPU pinning
|| || and there is no vCPU over-commitment,
KVM_HINTS_REALTIME || 0 || guest checks this feature bit to
|| || determine that vCPUs are never
|| || preempted for an unlimited time,
|| || allowing optimizations
----------------------------------------------------------------------------------

17
MAINTAINERS
View File

@ -4309,7 +4309,7 @@ F: Documentation/driver-api/dma-buf.rst
T: git git://anongit.freedesktop.org/drm/drm-misc
DMA GENERIC OFFLOAD ENGINE SUBSYSTEM
M: Vinod Koul <vinod.koul@intel.com>
M: Vinod Koul <vkoul@kernel.org>
L: dmaengine@vger.kernel.org
Q: https://patchwork.kernel.org/project/linux-dmaengine/list/
S: Maintained
@ -5388,7 +5388,6 @@ S: Maintained
F: drivers/iommu/exynos-iommu.c
EZchip NPS platform support
M: Elad Kanfi <eladkan@mellanox.com>
M: Vineet Gupta <vgupta@synopsys.com>
S: Supported
F: arch/arc/plat-eznps
@ -7698,6 +7697,7 @@ KERNEL SELFTEST FRAMEWORK
M: Shuah Khan <shuah@kernel.org>
L: linux-kselftest@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git
Q: https://patchwork.kernel.org/project/linux-kselftest/list/
S: Maintained
F: tools/testing/selftests/
F: Documentation/dev-tools/kselftest*
@ -9020,7 +9020,6 @@ Q: http://patchwork.ozlabs.org/project/netdev/list/
F: drivers/net/ethernet/mellanox/mlx5/core/en_*
MELLANOX ETHERNET INNOVA DRIVER
M: Ilan Tayari <ilant@mellanox.com>
R: Boris Pismenny <borisp@mellanox.com>
L: netdev@vger.kernel.org
S: Supported
@ -9030,7 +9029,6 @@ F: drivers/net/ethernet/mellanox/mlx5/core/fpga/*
F: include/linux/mlx5/mlx5_ifc_fpga.h
MELLANOX ETHERNET INNOVA IPSEC DRIVER
M: Ilan Tayari <ilant@mellanox.com>
R: Boris Pismenny <borisp@mellanox.com>
L: netdev@vger.kernel.org
S: Supported
@ -9086,7 +9084,6 @@ F: include/uapi/rdma/mlx4-abi.h
MELLANOX MLX5 core VPI driver
M: Saeed Mahameed <saeedm@mellanox.com>
M: Matan Barak <matanb@mellanox.com>
M: Leon Romanovsky <leonro@mellanox.com>
L: netdev@vger.kernel.org
L: linux-rdma@vger.kernel.org
@ -9097,7 +9094,6 @@ F: drivers/net/ethernet/mellanox/mlx5/core/
F: include/linux/mlx5/
MELLANOX MLX5 IB driver
M: Matan Barak <matanb@mellanox.com>
M: Leon Romanovsky <leonro@mellanox.com>
L: linux-rdma@vger.kernel.org
W: http://www.mellanox.com
@ -9831,7 +9827,6 @@ F: net/netfilter/xt_CONNSECMARK.c
F: net/netfilter/xt_SECMARK.c
NETWORKING [TLS]
M: Ilya Lesokhin <ilyal@mellanox.com>
M: Aviad Yehezkel <aviadye@mellanox.com>
M: Dave Watson <davejwatson@fb.com>
L: netdev@vger.kernel.org
@ -12220,7 +12215,7 @@ F: Documentation/s390/vfio-ccw.txt
F: include/uapi/linux/vfio_ccw.h
S390 ZCRYPT DRIVER
M: Harald Freudenberger <freude@de.ibm.com>
M: Harald Freudenberger <freude@linux.ibm.com>
L: linux-s390@vger.kernel.org
W: http://www.ibm.com/developerworks/linux/linux390/
S: Supported
@ -13264,6 +13259,12 @@ M: Jan-Benedict Glaw <jbglaw@lug-owl.de>
S: Maintained
F: arch/alpha/kernel/srm_env.c
ST STM32 I2C/SMBUS DRIVER
M: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
L: linux-i2c@vger.kernel.org
S: Maintained
F: drivers/i2c/busses/i2c-stm32*
STABLE BRANCH
M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
L: stable@vger.kernel.org

2
Makefile
View File

@ -2,7 +2,7 @@
VERSION = 4
PATCHLEVEL = 17
SUBLEVEL = 0
EXTRAVERSION = -rc5
EXTRAVERSION = -rc6
NAME = Merciless Moray
# *DOCUMENTATION*

1
arch/alpha/Kconfig
View File

@ -211,6 +211,7 @@ config ALPHA_EIGER
config ALPHA_JENSEN
bool "Jensen"
depends on BROKEN
select DMA_DIRECT_OPS
help
DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
of the first-generation Alpha systems. A number of these systems

8
arch/alpha/include/asm/dma-mapping.h
View File

@ -2,11 +2,15 @@
#ifndef _ALPHA_DMA_MAPPING_H
#define _ALPHA_DMA_MAPPING_H
extern const struct dma_map_ops *dma_ops;
extern const struct dma_map_ops alpha_pci_ops;
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
return dma_ops;
#ifdef CONFIG_ALPHA_JENSEN
return &dma_direct_ops;
#else
return &alpha_pci_ops;
#endif
}
#endif /* _ALPHA_DMA_MAPPING_H */

14
arch/alpha/kernel/io.c
View File

@ -37,20 +37,20 @@ unsigned int ioread32(void __iomem *addr)
void iowrite8(u8 b, void __iomem *addr)
{
IO_CONCAT(__IO_PREFIX,iowrite8)(b, addr);
mb();
IO_CONCAT(__IO_PREFIX,iowrite8)(b, addr);
}
void iowrite16(u16 b, void __iomem *addr)
{
IO_CONCAT(__IO_PREFIX,iowrite16)(b, addr);
mb();
IO_CONCAT(__IO_PREFIX,iowrite16)(b, addr);
}
void iowrite32(u32 b, void __iomem *addr)
{
IO_CONCAT(__IO_PREFIX,iowrite32)(b, addr);
mb();
IO_CONCAT(__IO_PREFIX,iowrite32)(b, addr);
}
EXPORT_SYMBOL(ioread8);
@ -176,26 +176,26 @@ u64 readq(const volatile void __iomem *addr)
void writeb(u8 b, volatile void __iomem *addr)
{
__raw_writeb(b, addr);
mb();
__raw_writeb(b, addr);
}
void writew(u16 b, volatile void __iomem *addr)
{
__raw_writew(b, addr);
mb();
__raw_writew(b, addr);
}
void writel(u32 b, volatile void __iomem *addr)
{
__raw_writel(b, addr);
mb();
__raw_writel(b, addr);
}
void writeq(u64 b, volatile void __iomem *addr)
{
__raw_writeq(b, addr);
mb();
__raw_writeq(b, addr);
}
EXPORT_SYMBOL(readb);

33
arch/alpha/kernel/pci-noop.c
View File

@ -102,36 +102,3 @@ SYSCALL_DEFINE5(pciconfig_write, unsigned long, bus, unsigned long, dfn,
else
return -ENODEV;
}
static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp,
unsigned long attrs)
{
void *ret;
if (!dev || *dev->dma_mask >= 0xffffffffUL)
gfp &= ~GFP_DMA;
ret = (void *)__get_free_pages(gfp, get_order(size));
if (ret) {
memset(ret, 0, size);
*dma_handle = virt_to_phys(ret);
}
return ret;
}
static int alpha_noop_supported(struct device *dev, u64 mask)
{
return mask < 0x00ffffffUL ? 0 : 1;
}
const struct dma_map_ops alpha_noop_ops = {
.alloc = alpha_noop_alloc_coherent,
.free = dma_noop_free_coherent,
.map_page = dma_noop_map_page,
.map_sg = dma_noop_map_sg,
.mapping_error = dma_noop_mapping_error,
.dma_supported = alpha_noop_supported,
};
const struct dma_map_ops *dma_ops = &alpha_noop_ops;
EXPORT_SYMBOL(dma_ops);

4
arch/alpha/kernel/pci_iommu.c
View File

@ -950,6 +950,4 @@ const struct dma_map_ops alpha_pci_ops = {
.mapping_error = alpha_pci_mapping_error,
.dma_supported = alpha_pci_supported,
};
const struct dma_map_ops *dma_ops = &alpha_pci_ops;
EXPORT_SYMBOL(dma_ops);
EXPORT_SYMBOL(alpha_pci_ops);

8
arch/arm/boot/compressed/Makefile
View File

@ -117,11 +117,9 @@ ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
asflags-y := -DZIMAGE
# Supply kernel BSS size to the decompressor via a linker symbol.
KBSS_SZ = $(shell $(CROSS_COMPILE)nm $(obj)/../../../../vmlinux | \
perl -e 'while (<>) { \
$$bss_start=hex($$1) if /^([[:xdigit:]]+) B __bss_start$$/; \
$$bss_end=hex($$1) if /^([[:xdigit:]]+) B __bss_stop$$/; \
}; printf "%d\n", $$bss_end - $$bss_start;')
KBSS_SZ = $(shell echo $$(($$($(CROSS_COMPILE)nm $(obj)/../../../../vmlinux | \
sed -n -e 's/^\([^ ]*\) [AB] __bss_start$$/-0x\1/p' \
-e 's/^\([^ ]*\) [AB] __bss_stop$$/+0x\1/p') )) )
LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
# Supply ZRELADDR to the decompressor via a linker symbol.
ifneq ($(CONFIG_AUTO_ZRELADDR),y)

20
arch/arm/boot/compressed/head.S
View File

@ -29,19 +29,19 @@
#if defined(CONFIG_DEBUG_ICEDCC)
#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
.macro loadsp, rb, tmp
.macro loadsp, rb, tmp1, tmp2
.endm
.macro writeb, ch, rb
mcr p14, 0, \ch, c0, c5, 0
.endm
#elif defined(CONFIG_CPU_XSCALE)
.macro loadsp, rb, tmp
.macro loadsp, rb, tmp1, tmp2
.endm
.macro writeb, ch, rb
mcr p14, 0, \ch, c8, c0, 0
.endm
#else
.macro loadsp, rb, tmp
.macro loadsp, rb, tmp1, tmp2
.endm
.macro writeb, ch, rb
mcr p14, 0, \ch, c1, c0, 0
@ -57,7 +57,7 @@
.endm
#if defined(CONFIG_ARCH_SA1100)
.macro loadsp, rb, tmp
.macro loadsp, rb, tmp1, tmp2
mov \rb, #0x80000000 @ physical base address
#ifdef CONFIG_DEBUG_LL_SER3
add \rb, \rb, #0x00050000 @ Ser3
@ -66,8 +66,8 @@
#endif
.endm
#else
.macro loadsp, rb, tmp
addruart \rb, \tmp
.macro loadsp, rb, tmp1, tmp2
addruart \rb, \tmp1, \tmp2
.endm
#endif
#endif
@ -561,8 +561,6 @@ not_relocated: mov r0, #0
bl decompress_kernel
bl cache_clean_flush
bl cache_off
mov r1, r7 @ restore architecture number
mov r2, r8 @ restore atags pointer
#ifdef CONFIG_ARM_VIRT_EXT
mrs r0, spsr @ Get saved CPU boot mode
@ -1297,7 +1295,7 @@ phex: adr r3, phexbuf
b 1b
@ puts corrupts {r0, r1, r2, r3}
puts: loadsp r3, r1
puts: loadsp r3, r2, r1
1: ldrb r2, [r0], #1
teq r2, #0
moveq pc, lr
@ -1314,8 +1312,8 @@ puts: loadsp r3, r1
@ putc corrupts {r0, r1, r2, r3}
putc:
mov r2, r0
loadsp r3, r1, r0
mov r0, #0
loadsp r3, r1
b 2b
@ memdump corrupts {r0, r1, r2, r3, r10, r11, r12, lr}
@ -1365,6 +1363,8 @@ __hyp_reentry_vectors:
__enter_kernel:
mov r0, #0 @ must be 0
mov r1, r7 @ restore architecture number
mov r2, r8 @ restore atags pointer
ARM( mov pc, r4 ) @ call kernel
M_CLASS( add r4, r4, #1 ) @ enter in Thumb mode for M class
THUMB( bx r4 ) @ entry point is always ARM for A/R classes

2
arch/arm/boot/dts/bcm-cygnus.dtsi
View File

@ -69,7 +69,7 @@
timer@20200 {
compatible = "arm,cortex-a9-global-timer";
reg = <0x20200 0x100>;
interrupts = <GIC_PPI 11 IRQ_TYPE_LEVEL_HIGH>;
interrupts = <GIC_PPI 11 IRQ_TYPE_EDGE_RISING>;
clocks = <&periph_clk>;
};

4
arch/arm/boot/dts/da850-lcdk.dts
View File

@ -21,8 +21,8 @@
stdout-path = "serial2:115200n8";
};
memory {
device_type = "memory";
memory@c0000000 {
/* 128 MB DDR2 SDRAM @ 0xc0000000 */
reg = <0xc0000000 0x08000000>;
};

13
arch/arm/boot/dts/da850.dtsi
View File

@ -7,10 +7,19 @@
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include "skeleton.dtsi"
#include <dt-bindings/interrupt-controller/irq.h>
/ {
#address-cells = <1>;
#size-cells = <1>;
chosen { };
aliases { };
memory@c0000000 {
device_type = "memory";
reg = <0xc0000000 0x0>;
};
arm {
#address-cells = <1>;
#size-cells = <1>;
@ -46,8 +55,6 @@
pmx_core: pinmux@14120 {
compatible = "pinctrl-single";
reg = <0x14120 0x50>;
#address-cells = <1>;
#size-cells = <0>;
#pinctrl-cells = <2>;
pinctrl-single,bit-per-mux;
pinctrl-single,register-width = <32>;

2
arch/arm/boot/dts/dm8148-evm.dts
View File

@ -10,7 +10,7 @@
/ {
model = "DM8148 EVM";
compatible = "ti,dm8148-evm", "ti,dm8148";
compatible = "ti,dm8148-evm", "ti,dm8148", "ti,dm814";
memory@80000000 {
device_type = "memory";

2
arch/arm/boot/dts/dm8148-t410.dts
View File

@ -9,7 +9,7 @@
/ {
model = "HP t410 Smart Zero Client";
compatible = "hp,t410", "ti,dm8148";
compatible = "hp,t410", "ti,dm8148", "ti,dm814";
memory@80000000 {
device_type = "memory";

2
arch/arm/boot/dts/dm8168-evm.dts
View File

@ -10,7 +10,7 @@
/ {
model = "DM8168 EVM";
compatible = "ti,dm8168-evm", "ti,dm8168";
compatible = "ti,dm8168-evm", "ti,dm8168", "ti,dm816";
memory@80000000 {
device_type = "memory";

2
arch/arm/boot/dts/dra62x-j5eco-evm.dts
View File

@ -10,7 +10,7 @@
/ {
model = "DRA62x J5 Eco EVM";
compatible = "ti,dra62x-j5eco-evm", "ti,dra62x", "ti,dm8148";
compatible = "ti,dra62x-j5eco-evm", "ti,dra62x", "ti,dm8148", "ti,dm814";
memory@80000000 {
device_type = "memory";

6
arch/arm/boot/dts/imx51-zii-rdu1.dts
View File

@ -523,7 +523,7 @@
};
touchscreen@20 {
compatible = "syna,rmi4_i2c";
compatible = "syna,rmi4-i2c";
reg = <0x20>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ts>;
@ -541,8 +541,8 @@
rmi4-f11@11 {
reg = <0x11>;
touch-inverted-y;
touch-swapped-x-y;
touchscreen-inverted-y;
touchscreen-swapped-x-y;
syna,sensor-type = <1>;
};
};

1
arch/arm/boot/dts/imx7s.dtsi
View File

@ -868,6 +868,7 @@
crypto: caam@30900000 {
compatible = "fsl,sec-v4.0";
fsl,sec-era = <8>;
#address-cells = <1>;
#size-cells = <1>;
reg = <0x30900000 0x40000>;

11
arch/arm/boot/dts/logicpd-som-lv.dtsi
View File

@ -26,7 +26,7 @@
gpio = <&gpio1 3 0>; /* gpio_3 */
startup-delay-us = <70000>;
enable-active-high;
vin-supply = <&vmmc2>;
vin-supply = <&vaux3>;
};
/* HS USB Host PHY on PORT 1 */
@ -82,6 +82,7 @@
twl_audio: audio {
compatible = "ti,twl4030-audio";
codec {
ti,hs_extmute_gpio = <&gpio2 25 GPIO_ACTIVE_HIGH>;
};
};
};
@ -199,6 +200,7 @@
pinctrl-single,pins = <
OMAP3_CORE1_IOPAD(0x21ba, PIN_INPUT | MUX_MODE0) /* i2c1_scl.i2c1_scl */
OMAP3_CORE1_IOPAD(0x21bc, PIN_INPUT | MUX_MODE0) /* i2c1_sda.i2c1_sda */
OMAP3_CORE1_IOPAD(0x20ba, PIN_OUTPUT | MUX_MODE4) /* gpmc_ncs6.gpio_57 */
>;
};
};
@ -213,7 +215,7 @@
};
wl127x_gpio: pinmux_wl127x_gpio_pin {
pinctrl-single,pins = <
OMAP3_WKUP_IOPAD(0x2a0c, PIN_INPUT | MUX_MODE4) /* sys_boot0.gpio_2 */
OMAP3_WKUP_IOPAD(0x2a0a, PIN_INPUT | MUX_MODE4) /* sys_boot0.gpio_2 */
OMAP3_WKUP_IOPAD(0x2a0c, PIN_OUTPUT | MUX_MODE4) /* sys_boot1.gpio_3 */
>;
};
@ -260,6 +262,11 @@
#include "twl4030.dtsi"
#include "twl4030_omap3.dtsi"
&vaux3 {
regulator-min-microvolt = <2800000>;
regulator-max-microvolt = <2800000>;
};
&twl {
twl_power: power {
compatible = "ti,twl4030-power-idle-osc-off", "ti,twl4030-power-idle";

22
arch/arm/boot/dts/r8a7790-lager.dts
View File

@ -379,7 +379,7 @@
port@0 {
reg = <0>;
adv7511_in: endpoint {
remote-endpoint = <&du_out_lvds0>;
remote-endpoint = <&lvds0_out>;
};
};
@ -467,10 +467,8 @@
status = "okay";
clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 722>,
<&cpg CPG_MOD 726>, <&cpg CPG_MOD 725>,
<&x13_clk>, <&x2_clk>;
clock-names = "du.0", "du.1", "du.2", "lvds.0", "lvds.1",
"dclkin.0", "dclkin.1";
clock-names = "du.0", "du.1", "du.2", "dclkin.0", "dclkin.1";
ports {
port@0 {
@ -478,12 +476,26 @@
remote-endpoint = <&adv7123_in>;
};
};
};
};
&lvds0 {
status = "okay";
ports {
port@1 {
endpoint {
remote-endpoint = <&adv7511_in>;
};
};
port@2 {
};
};
&lvds1 {
status = "okay";
ports {
port@1 {
lvds_connector: endpoint {
};
};

65
arch/arm/boot/dts/r8a7790.dtsi
View File

@ -1627,18 +1627,13 @@
du: display@feb00000 {
compatible = "renesas,du-r8a7790";
reg = <0 0xfeb00000 0 0x70000>,
<0 0xfeb90000 0 0x1c>,
<0 0xfeb94000 0 0x1c>;
reg-names = "du", "lvds.0", "lvds.1";
reg = <0 0xfeb00000 0 0x70000>;
interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
<&cpg CPG_MOD 722>, <&cpg CPG_MOD 726>,
<&cpg CPG_MOD 725>;
clock-names = "du.0", "du.1", "du.2", "lvds.0",
"lvds.1";
<&cpg CPG_MOD 722>;
clock-names = "du.0", "du.1", "du.2";
status = "disabled";
ports {
@ -1653,11 +1648,65 @@
port@1 {
reg = <1>;
du_out_lvds0: endpoint {
remote-endpoint = <&lvds0_in>;
};
};
port@2 {
reg = <2>;
du_out_lvds1: endpoint {
remote-endpoint = <&lvds1_in>;
};
};
};
};
lvds0: lvds@feb90000 {
compatible = "renesas,r8a7790-lvds";
reg = <0 0xfeb90000 0 0x1c>;
clocks = <&cpg CPG_MOD 726>;
power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
resets = <&cpg 726>;
status = "disabled";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
lvds0_in: endpoint {
remote-endpoint = <&du_out_lvds0>;
};
};
port@1 {
reg = <1>;
lvds0_out: endpoint {
};
};
};
};
lvds1: lvds@feb94000 {
compatible = "renesas,r8a7790-lvds";
reg = <0 0xfeb94000 0 0x1c>;
clocks = <&cpg CPG_MOD 725>;
power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
resets = <&cpg 725>;
status = "disabled";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
lvds1_in: endpoint {
remote-endpoint = <&du_out_lvds1>;
};
};
port@1 {
reg = <1>;
lvds1_out: endpoint {
};
};
};

12
arch/arm/boot/dts/r8a7791-koelsch.dts
View File

@ -468,10 +468,9 @@
pinctrl-names = "default";
status = "okay";
clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
<&x13_clk>, <&x2_clk>;
clock-names = "du.0", "du.1", "lvds.0",
"dclkin.0", "dclkin.1";
clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
ports {
port@0 {
@ -479,6 +478,13 @@
remote-endpoint = <&adv7511_in>;
};
};
};
};
&lvds0 {
status = "okay";
ports {
port@1 {
lvds_connector: endpoint {
};

16
arch/arm/boot/dts/r8a7791-porter.dts
View File

@ -441,10 +441,9 @@
pinctrl-names = "default";
status = "okay";
clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
<&x3_clk>, <&x16_clk>;
clock-names = "du.0", "du.1", "lvds.0",
"dclkin.0", "dclkin.1";
clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
ports {
port@0 {
@ -455,6 +454,17 @@
};
};
&lvds0 {
status = "okay";
ports {
port@1 {
lvds_connector: endpoint {
};
};
};
};
&rcar_sound {
pinctrl-0 = <&ssi_pins &audio_clk_pins>;
pinctrl-names = "default";

36
arch/arm/boot/dts/r8a7791.dtsi
View File

@ -1633,15 +1633,12 @@
du: display@feb00000 {
compatible = "renesas,du-r8a7791";
reg = <0 0xfeb00000 0 0x40000>,
<0 0xfeb90000 0 0x1c>;
reg-names = "du", "lvds.0";
reg = <0 0xfeb00000 0 0x40000>;
interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&cpg CPG_MOD 724>,
<&cpg CPG_MOD 723>,
<&cpg CPG_MOD 726>;
clock-names = "du.0", "du.1", "lvds.0";
<&cpg CPG_MOD 723>;
clock-names = "du.0", "du.1";
status = "disabled";
ports {
@ -1656,6 +1653,33 @@
port@1 {
reg = <1>;
du_out_lvds0: endpoint {
remote-endpoint = <&lvds0_in>;
};
};
};
};
lvds0: lvds@feb90000 {
compatible = "renesas,r8a7791-lvds";
reg = <0 0xfeb90000 0 0x1c>;
clocks = <&cpg CPG_MOD 726>;
power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
resets = <&cpg 726>;
status = "disabled";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
lvds0_in: endpoint {
remote-endpoint = <&du_out_lvds0>;
};
};
port@1 {
reg = <1>;
lvds0_out: endpoint {
};
};
};

10
arch/arm/boot/dts/r8a7793-gose.dts
View File

@ -447,10 +447,9 @@
pinctrl-names = "default";
status = "okay";
clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
<&x13_clk>, <&x2_clk>;
clock-names = "du.0", "du.1", "lvds.0",
"dclkin.0", "dclkin.1";
clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
ports {
port@0 {
@ -458,6 +457,11 @@
remote-endpoint = <&adv7511_in>;
};
};
};
};
&lvds0 {
ports {
port@1 {
lvds_connector: endpoint {
};

37
arch/arm/boot/dts/r8a7793.dtsi
View File

@ -1292,15 +1292,12 @@
du: display@feb00000 {
compatible = "renesas,du-r8a7793";
reg = <0 0xfeb00000 0 0x40000>,
<0 0xfeb90000 0 0x1c>;
reg-names = "du", "lvds.0";
reg = <0 0xfeb00000 0 0x40000>;
interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&cpg CPG_MOD 724>,
<&cpg CPG_MOD 723>,
<&cpg CPG_MOD 726>;
clock-names = "du.0", "du.1", "lvds.0";
<&cpg CPG_MOD 723>;
clock-names = "du.0", "du.1";
status = "disabled";
ports {
@ -1315,6 +1312,34 @@
port@1 {
reg = <1>;
du_out_lvds0: endpoint {
remote-endpoint = <&lvds0_in>;
};
};
};
};
lvds0: lvds@feb90000 {
compatible = "renesas,r8a7793-lvds";
reg = <0 0xfeb90000 0 0x1c>;
clocks = <&cpg CPG_MOD 726>;
power-domains = <&sysc R8A7793_PD_ALWAYS_ON>;
resets = <&cpg 726>;
status = "disabled";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
lvds0_in: endpoint {
remote-endpoint = <&du_out_lvds0>;
};
};
port@1 {
reg = <1>;
lvds0_out: endpoint {
};
};
};

2
arch/arm/boot/dts/tegra20.dtsi
View File

@ -741,7 +741,7 @@
phy_type = "ulpi";
clocks = <&tegra_car TEGRA20_CLK_USB2>,
<&tegra_car TEGRA20_CLK_PLL_U>,
<&tegra_car TEGRA20_CLK_PLL_P_OUT4>;
<&tegra_car TEGRA20_CLK_CDEV2>;
clock-names = "reg", "pll_u", "ulpi-link";
resets = <&tegra_car 58>, <&tegra_car 22>;
reset-names = "usb", "utmi-pads";

10
arch/arm/include/asm/assembler.h
View File

@ -536,4 +536,14 @@ THUMB( orr \reg , \reg , #PSR_T_BIT )
#endif
.endm
#ifdef CONFIG_KPROBES
#define _ASM_NOKPROBE(entry) \
.pushsection "_kprobe_blacklist", "aw" ; \
.balign 4 ; \
.long entry; \
.popsection
#else
#define _ASM_NOKPROBE(entry)
#endif
#endif /* __ASM_ASSEMBLER_H__ */

16
arch/arm/include/asm/kvm_mmu.h
View File

@ -309,6 +309,22 @@ static inline unsigned int kvm_get_vmid_bits(void)
return 8;
}
/*
* We are not in the kvm->srcu critical section most of the time, so we take
* the SRCU read lock here. Since we copy the data from the user page, we
* can immediately drop the lock again.
*/
static inline int kvm_read_guest_lock(struct kvm *kvm,
gpa_t gpa, void *data, unsigned long len)
{
int srcu_idx = srcu_read_lock(&kvm->srcu);
int ret = kvm_read_guest(kvm, gpa, data, len);
srcu_read_unlock(&kvm->srcu, srcu_idx);
return ret;
}
static inline void *kvm_get_hyp_vector(void)
{
return kvm_ksym_ref(__kvm_hyp_vector);

13
arch/arm/include/uapi/asm/siginfo.h
View File

@ -1,13 +0,0 @@
#ifndef __ASM_SIGINFO_H
#define __ASM_SIGINFO_H
#include <asm-generic/siginfo.h>
/*
* SIGFPE si_codes
*/
#ifdef __KERNEL__
#define FPE_FIXME 0 /* Broken dup of SI_USER */
#endif /* __KERNEL__ */
#endif

36
arch/arm/kernel/machine_kexec.c
View File

@ -83,7 +83,7 @@ void machine_crash_nonpanic_core(void *unused)
{
struct pt_regs regs;
crash_setup_regs(&regs, NULL);
crash_setup_regs(&regs, get_irq_regs());
printk(KERN_DEBUG "CPU %u will stop doing anything useful since another CPU has crashed\n",
smp_processor_id());
crash_save_cpu(&regs, smp_processor_id());
@ -95,6 +95,27 @@ void machine_crash_nonpanic_core(void *unused)
cpu_relax();
}
void crash_smp_send_stop(void)
{
static int cpus_stopped;
unsigned long msecs;
if (cpus_stopped)
return;
atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
smp_call_function(machine_crash_nonpanic_core, NULL, false);
msecs = 1000; /* Wait at most a second for the other cpus to stop */
while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
mdelay(1);
msecs--;
}
if (atomic_read(&waiting_for_crash_ipi) > 0)
pr_warn("Non-crashing CPUs did not react to IPI\n");
cpus_stopped = 1;
}
static void machine_kexec_mask_interrupts(void)
{
unsigned int i;
@ -120,19 +141,8 @@ static void machine_kexec_mask_interrupts(void)
void machine_crash_shutdown(struct pt_regs *regs)
{
unsigned long msecs;
local_irq_disable();
atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
smp_call_function(machine_crash_nonpanic_core, NULL, false);
msecs = 1000; /* Wait at most a second for the other cpus to stop */
while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
mdelay(1);
msecs--;
}
if (atomic_read(&waiting_for_crash_ipi) > 0)
pr_warn("Non-crashing CPUs did not react to IPI\n");
crash_smp_send_stop();
crash_save_cpu(regs, smp_processor_id());
machine_kexec_mask_interrupts();

5
arch/arm/kernel/traps.c
View File

@ -19,6 +19,7 @@
#include <linux/uaccess.h>
#include <linux/hardirq.h>
#include <linux/kdebug.h>
#include <linux/kprobes.h>
#include <linux/module.h>
#include <linux/kexec.h>
#include <linux/bug.h>
@ -417,7 +418,8 @@ void unregister_undef_hook(struct undef_hook *hook)
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
static int call_undef_hook(struct pt_regs *regs, unsigned int instr)
static nokprobe_inline
int call_undef_hook(struct pt_regs *regs, unsigned int instr)
{
struct undef_hook *hook;
unsigned long flags;
@ -490,6 +492,7 @@ die_sig:
arm_notify_die("Oops - undefined instruction", regs, &info, 0, 6);
}
NOKPROBE_SYMBOL(do_undefinstr)
/*
* Handle FIQ similarly to NMI on x86 systems.

10
arch/arm/lib/getuser.S
View File

@ -38,6 +38,7 @@ ENTRY(__get_user_1)
mov r0, #0
ret lr
ENDPROC(__get_user_1)
_ASM_NOKPROBE(__get_user_1)
ENTRY(__get_user_2)
check_uaccess r0, 2, r1, r2, __get_user_bad
@ -58,6 +59,7 @@ rb .req r0
mov r0, #0
ret lr
ENDPROC(__get_user_2)
_ASM_NOKPROBE(__get_user_2)
ENTRY(__get_user_4)
check_uaccess r0, 4, r1, r2, __get_user_bad
@ -65,6 +67,7 @@ ENTRY(__get_user_4)
mov r0, #0
ret lr
ENDPROC(__get_user_4)
_ASM_NOKPROBE(__get_user_4)
ENTRY(__get_user_8)
check_uaccess r0, 8, r1, r2, __get_user_bad8
@ -78,6 +81,7 @@ ENTRY(__get_user_8)
mov r0, #0
ret lr
ENDPROC(__get_user_8)
_ASM_NOKPROBE(__get_user_8)
#ifdef __ARMEB__
ENTRY(__get_user_32t_8)
@ -91,6 +95,7 @@ ENTRY(__get_user_32t_8)
mov r0, #0
ret lr
ENDPROC(__get_user_32t_8)
_ASM_NOKPROBE(__get_user_32t_8)
ENTRY(__get_user_64t_1)
check_uaccess r0, 1, r1, r2, __get_user_bad8
@ -98,6 +103,7 @@ ENTRY(__get_user_64t_1)
mov r0, #0
ret lr
ENDPROC(__get_user_64t_1)
_ASM_NOKPROBE(__get_user_64t_1)
ENTRY(__get_user_64t_2)
check_uaccess r0, 2, r1, r2, __get_user_bad8
@ -114,6 +120,7 @@ rb .req r0
mov r0, #0
ret lr
ENDPROC(__get_user_64t_2)
_ASM_NOKPROBE(__get_user_64t_2)
ENTRY(__get_user_64t_4)
check_uaccess r0, 4, r1, r2, __get_user_bad8
@ -121,6 +128,7 @@ ENTRY(__get_user_64t_4)
mov r0, #0
ret lr
ENDPROC(__get_user_64t_4)
_ASM_NOKPROBE(__get_user_64t_4)
#endif
__get_user_bad8:
@ -131,6 +139,8 @@ __get_user_bad:
ret lr
ENDPROC(__get_user_bad)
ENDPROC(__get_user_bad8)
_ASM_NOKPROBE(__get_user_bad)
_ASM_NOKPROBE(__get_user_bad8)
.pushsection __ex_table, "a"
.long 1b, __get_user_bad

9
arch/arm/mach-davinci/board-da830-evm.c
View File

@ -205,12 +205,17 @@ static const short da830_evm_mmc_sd_pins[] = {
-1
};
#define DA830_MMCSD_WP_PIN GPIO_TO_PIN(2, 1)
#define DA830_MMCSD_CD_PIN GPIO_TO_PIN(2, 2)
static struct gpiod_lookup_table mmc_gpios_table = {
.dev_id = "da830-mmc.0",
.table = {
/* gpio chip 1 contains gpio range 32-63 */
GPIO_LOOKUP("davinci_gpio.1", 2, "cd", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.1", 1, "wp", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.0", DA830_MMCSD_CD_PIN, "cd",
GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.0", DA830_MMCSD_WP_PIN, "wp",
GPIO_ACTIVE_LOW),
},
};

9
arch/arm/mach-davinci/board-da850-evm.c
View File

@ -763,12 +763,17 @@ static const short da850_evm_mcasp_pins[] __initconst = {
-1
};
#define DA850_MMCSD_CD_PIN GPIO_TO_PIN(4, 0)
#define DA850_MMCSD_WP_PIN GPIO_TO_PIN(4, 1)
static struct gpiod_lookup_table mmc_gpios_table = {
.dev_id = "da830-mmc.0",
.table = {
/* gpio chip 2 contains gpio range 64-95 */
GPIO_LOOKUP("davinci_gpio.2", 0, "cd", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.2", 1, "wp", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.0", DA850_MMCSD_CD_PIN, "cd",
GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.0", DA850_MMCSD_WP_PIN, "wp",
GPIO_ACTIVE_LOW),
},
};

15
arch/arm/mach-davinci/board-dm355-evm.c
View File

@ -19,6 +19,7 @@
#include <linux/gpio.h>
#include <linux/gpio/machine.h>
#include <linux/clk.h>
#include <linux/dm9000.h>
#include <linux/videodev2.h>
#include <media/i2c/tvp514x.h>
#include <linux/spi/spi.h>
@ -109,12 +110,15 @@ static struct platform_device davinci_nand_device = {
},
};
#define DM355_I2C_SDA_PIN GPIO_TO_PIN(0, 15)
#define DM355_I2C_SCL_PIN GPIO_TO_PIN(0, 14)
static struct gpiod_lookup_table i2c_recovery_gpiod_table = {
.dev_id = "i2c_davinci",
.dev_id = "i2c_davinci.1",
.table = {
GPIO_LOOKUP("davinci_gpio", 15, "sda",
GPIO_LOOKUP("davinci_gpio.0", DM355_I2C_SDA_PIN, "sda",
GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
GPIO_LOOKUP("davinci_gpio", 14, "scl",
GPIO_LOOKUP("davinci_gpio.0", DM355_I2C_SCL_PIN, "scl",
GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
},
};
@ -179,11 +183,16 @@ static struct resource dm355evm_dm9000_rsrc[] = {
},
};
static struct dm9000_plat_data dm335evm_dm9000_platdata;
static struct platform_device dm355evm_dm9000 = {
.name = "dm9000",
.id = -1,
.resource = dm355evm_dm9000_rsrc,
.num_resources = ARRAY_SIZE(dm355evm_dm9000_rsrc),
.dev = {
.platform_data = &dm335evm_dm9000_platdata,
},
};
static struct tvp514x_platform_data tvp5146_pdata = {

10
arch/arm/mach-davinci/board-dm644x-evm.c
View File

@ -17,6 +17,7 @@
#include <linux/i2c.h>
#include <linux/platform_data/pcf857x.h>
#include <linux/platform_data/at24.h>
#include <linux/platform_data/gpio-davinci.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/rawnand.h>
#include <linux/mtd/partitions.h>
@ -596,12 +597,15 @@ static struct i2c_board_info __initdata i2c_info[] = {
},
};
#define DM644X_I2C_SDA_PIN GPIO_TO_PIN(2, 12)
#define DM644X_I2C_SCL_PIN GPIO_TO_PIN(2, 11)
static struct gpiod_lookup_table i2c_recovery_gpiod_table = {
.dev_id = "i2c_davinci",
.dev_id = "i2c_davinci.1",
.table = {
GPIO_LOOKUP("davinci_gpio", 44, "sda",
GPIO_LOOKUP("davinci_gpio.0", DM644X_I2C_SDA_PIN, "sda",
GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
GPIO_LOOKUP("davinci_gpio", 43, "scl",
GPIO_LOOKUP("davinci_gpio.0", DM644X_I2C_SCL_PIN, "scl",
GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
},
};

5
arch/arm/mach-davinci/board-dm646x-evm.c
View File

@ -532,11 +532,12 @@ static struct vpif_display_config dm646x_vpif_display_config = {
.set_clock = set_vpif_clock,
.subdevinfo = dm646x_vpif_subdev,
.subdev_count = ARRAY_SIZE(dm646x_vpif_subdev),
.i2c_adapter_id = 1,
.chan_config[0] = {
.outputs = dm6467_ch0_outputs,
.output_count = ARRAY_SIZE(dm6467_ch0_outputs),
},
.card_name = "DM646x EVM",
.card_name = "DM646x EVM Video Display",
};
/**
@ -674,6 +675,7 @@ static struct vpif_capture_config dm646x_vpif_capture_cfg = {
.setup_input_channel_mode = setup_vpif_input_channel_mode,
.subdev_info = vpif_capture_sdev_info,
.subdev_count = ARRAY_SIZE(vpif_capture_sdev_info),
.i2c_adapter_id = 1,
.chan_config[0] = {
.inputs = dm6467_ch0_inputs,
.input_count = ARRAY_SIZE(dm6467_ch0_inputs),
@ -694,6 +696,7 @@ static struct vpif_capture_config dm646x_vpif_capture_cfg = {
.fid_pol = 0,
},
},
.card_name = "DM646x EVM Video Capture",
};
static void __init evm_init_video(void)

10
arch/arm/mach-davinci/board-omapl138-hawk.c
View File

@ -123,12 +123,16 @@ static const short hawk_mmcsd0_pins[] = {
-1
};
#define DA850_HAWK_MMCSD_CD_PIN GPIO_TO_PIN(3, 12)
#define DA850_HAWK_MMCSD_WP_PIN GPIO_TO_PIN(3, 13)
static struct gpiod_lookup_table mmc_gpios_table = {
.dev_id = "da830-mmc.0",
.table = {
/* CD: gpio3_12: gpio60: chip 1 contains gpio range 32-63*/
GPIO_LOOKUP("davinci_gpio.0", 28, "cd", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.0", 29, "wp", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.0", DA850_HAWK_MMCSD_CD_PIN, "cd",
GPIO_ACTIVE_LOW),
GPIO_LOOKUP("davinci_gpio.0", DA850_HAWK_MMCSD_WP_PIN, "wp",
GPIO_ACTIVE_LOW),
},
};

3
arch/arm/mach-davinci/dm646x.c
View File

@ -488,7 +488,8 @@ static u8 dm646x_default_priorities[DAVINCI_N_AINTC_IRQ] = {
[IRQ_DM646X_MCASP0TXINT] = 7,
[IRQ_DM646X_MCASP0RXINT] = 7,
[IRQ_DM646X_RESERVED_3] = 7,
[IRQ_DM646X_MCASP1TXINT] = 7, /* clockevent */
[IRQ_DM646X_MCASP1TXINT] = 7,
[IRQ_TINT0_TINT12] = 7, /* clockevent */
[IRQ_TINT0_TINT34] = 7, /* clocksource */
[IRQ_TINT1_TINT12] = 7, /* DSP timer */
[IRQ_TINT1_TINT34] = 7, /* system tick */

1
arch/arm/mach-keystone/pm_domain.c
View File

@ -29,6 +29,7 @@ static struct dev_pm_domain keystone_pm_domain = {
static struct pm_clk_notifier_block platform_domain_notifier = {
.pm_domain = &keystone_pm_domain,
.con_ids = { NULL },
};
static const struct of_device_id of_keystone_table[] = {

26
arch/arm/mach-omap1/ams-delta-fiq.c
View File

@ -58,22 +58,24 @@ static irqreturn_t deferred_fiq(int irq, void *dev_id)
irq_num = gpio_to_irq(gpio);
fiq_count = fiq_buffer[FIQ_CNT_INT_00 + gpio];
while (irq_counter[gpio] < fiq_count) {
if (gpio != AMS_DELTA_GPIO_PIN_KEYBRD_CLK) {
struct irq_data *d = irq_get_irq_data(irq_num);
if (irq_counter[gpio] < fiq_count &&
gpio != AMS_DELTA_GPIO_PIN_KEYBRD_CLK) {
struct irq_data *d = irq_get_irq_data(irq_num);
/*
* It looks like handle_edge_irq() that
* OMAP GPIO edge interrupts default to,
* expects interrupt already unmasked.
*/
if (irq_chip && irq_chip->irq_unmask)
/*
* handle_simple_irq() that OMAP GPIO edge
* interrupts default to since commit 80ac93c27441
* requires interrupt already acked and unmasked.
*/
if (irq_chip) {
if (irq_chip->irq_ack)
irq_chip->irq_ack(d);
if (irq_chip->irq_unmask)
irq_chip->irq_unmask(d);
}
generic_handle_irq(irq_num);
irq_counter[gpio]++;
}
for (; irq_counter[gpio] < fiq_count; irq_counter[gpio]++)
generic_handle_irq(irq_num);
}
return IRQ_HANDLED;
}

4
arch/arm/mach-omap2/powerdomain.c
View File

@ -188,7 +188,7 @@ static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
((prev & OMAP_POWERSTATE_MASK) << 0));
trace_power_domain_target_rcuidle(pwrdm->name,
trace_state,
smp_processor_id());
raw_smp_processor_id());
}
break;
default:
@ -518,7 +518,7 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) {
/* Trace the pwrdm desired target state */
trace_power_domain_target_rcuidle(pwrdm->name, pwrst,
smp_processor_id());
raw_smp_processor_id());
/* Program the pwrdm desired target state */
ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst);
}

16
arch/arm/mm/dma-mapping.c
View File

@ -466,12 +466,6 @@ void __init dma_contiguous_early_fixup(phys_addr_t base, unsigned long size)
void __init dma_contiguous_remap(void)
{
int i;
if (!dma_mmu_remap_num)
return;
/* call flush_cache_all() since CMA area would be large enough */
flush_cache_all();
for (i = 0; i < dma_mmu_remap_num; i++) {
phys_addr_t start = dma_mmu_remap[i].base;
phys_addr_t end = start + dma_mmu_remap[i].size;
@ -504,15 +498,7 @@ void __init dma_contiguous_remap(void)
flush_tlb_kernel_range(__phys_to_virt(start),
__phys_to_virt(end));
/*
* All the memory in CMA region will be on ZONE_MOVABLE.
* If that zone is considered as highmem, the memory in CMA
* region is also considered as highmem even if it's
* physical address belong to lowmem. In this case,
* re-mapping isn't required.
*/
if (!is_highmem_idx(ZONE_MOVABLE))
iotable_init(&map, 1);
iotable_init(&map, 1);
}
}

4
arch/arm/probes/kprobes/opt-arm.c
View File

@ -165,13 +165,14 @@ optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs)
{
unsigned long flags;
struct kprobe *p = &op->kp;
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
struct kprobe_ctlblk *kcb;
/* Save skipped registers */
regs->ARM_pc = (unsigned long)op->kp.addr;
regs->ARM_ORIG_r0 = ~0UL;
local_irq_save(flags);
kcb = get_kprobe_ctlblk();
if (kprobe_running()) {
kprobes_inc_nmissed_count(&op->kp);
@ -191,6 +192,7 @@ optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs)
local_irq_restore(flags);
}
NOKPROBE_SYMBOL(optimized_callback)
int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, struct kprobe *orig)
{

2
arch/arm/vfp/vfpmodule.c
View File

@ -257,7 +257,7 @@ static void vfp_raise_exceptions(u32 exceptions, u32 inst, u32 fpscr, struct pt_
if (exceptions == VFP_EXCEPTION_ERROR) {
vfp_panic("unhandled bounce", inst);
vfp_raise_sigfpe(FPE_FIXME, regs);
vfp_raise_sigfpe(FPE_FLTINV, regs);
return;
}

2
arch/arm64/boot/dts/exynos/exynos5433.dtsi
View File

@ -1317,7 +1317,7 @@
reg = <0x14d60000 0x100>;
dmas = <&pdma0 31 &pdma0 30>;
dma-names = "tx", "rx";
interrupts = <GIC_SPI 435 IRQ_TYPE_NONE>;
interrupts = <GIC_SPI 435 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&cmu_peric CLK_PCLK_I2S1>,
<&cmu_peric CLK_PCLK_I2S1>,
<&cmu_peric CLK_SCLK_I2S1>;

7
arch/arm64/boot/dts/marvell/armada-cp110.dtsi
View File

@ -38,9 +38,10 @@
compatible = "marvell,armada-7k-pp22";
reg = <0x0 0x100000>, <0x129000 0xb000>;
clocks = <&CP110_LABEL(clk) 1 3>, <&CP110_LABEL(clk) 1 9>,
<&CP110_LABEL(clk) 1 5>, <&CP110_LABEL(clk) 1 18>;
<&CP110_LABEL(clk) 1 5>, <&CP110_LABEL(clk) 1 6>,
<&CP110_LABEL(clk) 1 18>;
clock-names = "pp_clk", "gop_clk",
"mg_clk", "axi_clk";
"mg_clk", "mg_core_clk", "axi_clk";
marvell,system-controller = <&CP110_LABEL(syscon0)>;
status = "disabled";
dma-coherent;
@ -141,6 +142,8 @@
#size-cells = <0>;
compatible = "marvell,xmdio";
reg = <0x12a600 0x10>;
clocks = <&CP110_LABEL(clk) 1 5>,
<&CP110_LABEL(clk) 1 6>, <&CP110_LABEL(clk) 1 18>;
status = "disabled";
};

2
arch/arm64/boot/dts/nvidia/tegra186-p3310.dtsi
View File

@ -46,7 +46,7 @@
compatible = "ethernet-phy-ieee802.3-c22";
reg = <0x0>;
interrupt-parent = <&gpio>;
interrupts = <TEGRA_MAIN_GPIO(M, 5) IRQ_TYPE_LEVEL_HIGH>;
interrupts = <TEGRA_MAIN_GPIO(M, 5) IRQ_TYPE_LEVEL_LOW>;
};
};
};

2
arch/arm64/boot/dts/socionext/uniphier-ld11.dtsi
View File

@ -414,7 +414,7 @@
mmc-ddr-1_8v;
mmc-hs200-1_8v;
mmc-pwrseq = <&emmc_pwrseq>;
cdns,phy-input-delay-legacy = <4>;
cdns,phy-input-delay-legacy = <9>;
cdns,phy-input-delay-mmc-highspeed = <2>;
cdns,phy-input-delay-mmc-ddr = <3>;
cdns,phy-dll-delay-sdclk = <21>;

8
arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts
View File

@ -67,3 +67,11 @@
reg = <0>;
};
};
&pinctrl_ether_rgmii {
tx {
pins = "RGMII_TXCLK", "RGMII_TXD0", "RGMII_TXD1",
"RGMII_TXD2", "RGMII_TXD3", "RGMII_TXCTL";
drive-strength = <9>;
};
};

2
arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi
View File

@ -519,7 +519,7 @@
mmc-ddr-1_8v;
mmc-hs200-1_8v;
mmc-pwrseq = <&emmc_pwrseq>;
cdns,phy-input-delay-legacy = <4>;
cdns,phy-input-delay-legacy = <9>;
cdns,phy-input-delay-mmc-highspeed = <2>;
cdns,phy-input-delay-mmc-ddr = <3>;
cdns,phy-dll-delay-sdclk = <21>;

2
arch/arm64/boot/dts/socionext/uniphier-pxs3.dtsi
View File

@ -334,7 +334,7 @@
mmc-ddr-1_8v;
mmc-hs200-1_8v;
mmc-pwrseq = <&emmc_pwrseq>;
cdns,phy-input-delay-legacy = <4>;
cdns,phy-input-delay-legacy = <9>;
cdns,phy-input-delay-mmc-highspeed = <2>;
cdns,phy-input-delay-mmc-ddr = <3>;
cdns,phy-dll-delay-sdclk = <21>;

16
arch/arm64/include/asm/kvm_mmu.h
View File

@ -360,6 +360,22 @@ static inline unsigned int kvm_get_vmid_bits(void)
return (cpuid_feature_extract_unsigned_field(reg, ID_AA64MMFR1_VMIDBITS_SHIFT) == 2) ? 16 : 8;
}
/*
* We are not in the kvm->srcu critical section most of the time, so we take
* the SRCU read lock here. Since we copy the data from the user page, we
* can immediately drop the lock again.
*/
static inline int kvm_read_guest_lock(struct kvm *kvm,
gpa_t gpa, void *data, unsigned long len)
{
int srcu_idx = srcu_read_lock(&kvm->srcu);
int ret = kvm_read_guest(kvm, gpa, data, len);
srcu_read_unlock(&kvm->srcu, srcu_idx);
return ret;
}
#ifdef CONFIG_KVM_INDIRECT_VECTORS
/*
* EL2 vectors can be mapped and rerouted in a number of ways,

6
arch/mips/boot/compressed/uart-16550.c
View File

@ -18,9 +18,9 @@
#define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
#endif
#if defined(CONFIG_MACH_JZ4740) || defined(CONFIG_MACH_JZ4780)
#include <asm/mach-jz4740/base.h>
#define PORT(offset) (CKSEG1ADDR(JZ4740_UART0_BASE_ADDR) + (4 * offset))
#ifdef CONFIG_MACH_INGENIC
#define INGENIC_UART0_BASE_ADDR 0x10030000
#define PORT(offset) (CKSEG1ADDR(INGENIC_UART0_BASE_ADDR) + (4 * offset))
#endif
#ifdef CONFIG_CPU_XLR

2
arch/mips/boot/dts/xilfpga/Makefile
View File

@ -1,4 +1,2 @@
# SPDX-License-Identifier: GPL-2.0
dtb-$(CONFIG_FIT_IMAGE_FDT_XILFPGA) += nexys4ddr.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))

1
arch/mips/generic/Platform
View File

@ -16,3 +16,4 @@ all-$(CONFIG_MIPS_GENERIC) := vmlinux.gz.itb
its-y := vmlinux.its.S
its-$(CONFIG_FIT_IMAGE_FDT_BOSTON) += board-boston.its.S
its-$(CONFIG_FIT_IMAGE_FDT_NI169445) += board-ni169445.its.S
its-$(CONFIG_FIT_IMAGE_FDT_XILFPGA) += board-xilfpga.its.S

22
arch/mips/kernel/ptrace.c
View File

@ -463,7 +463,7 @@ static int fpr_get_msa(struct task_struct *target,
/*
* Copy the floating-point context to the supplied NT_PRFPREG buffer.
* Choose the appropriate helper for general registers, and then copy
* the FCSR register separately.
* the FCSR and FIR registers separately.
*/
static int fpr_get(struct task_struct *target,
const struct user_regset *regset,
@ -471,6 +471,7 @@ static int fpr_get(struct task_struct *target,
void *kbuf, void __user *ubuf)
{
const int fcr31_pos = NUM_FPU_REGS * sizeof(elf_fpreg_t);
const int fir_pos = fcr31_pos + sizeof(u32);
int err;
if (sizeof(target->thread.fpu.fpr[0]) == sizeof(elf_fpreg_t))
@ -483,6 +484,12 @@ static int fpr_get(struct task_struct *target,
err = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.fpu.fcr31,
fcr31_pos, fcr31_pos + sizeof(u32));
if (err)
return err;
err = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&boot_cpu_data.fpu_id,
fir_pos, fir_pos + sizeof(u32));
return err;
}
@ -531,7 +538,8 @@ static int fpr_set_msa(struct task_struct *target,
/*
* Copy the supplied NT_PRFPREG buffer to the floating-point context.
* Choose the appropriate helper for general registers, and then copy
* the FCSR register separately.
* the FCSR register separately. Ignore the incoming FIR register
* contents though, as the register is read-only.
*
* We optimize for the case where `count % sizeof(elf_fpreg_t) == 0',
* which is supposed to have been guaranteed by the kernel before
@ -545,6 +553,7 @@ static int fpr_set(struct task_struct *target,
const void *kbuf, const void __user *ubuf)
{
const int fcr31_pos = NUM_FPU_REGS * sizeof(elf_fpreg_t);
const int fir_pos = fcr31_pos + sizeof(u32);
u32 fcr31;
int err;
@ -572,6 +581,11 @@ static int fpr_set(struct task_struct *target,
ptrace_setfcr31(target, fcr31);
}
if (count > 0)
err = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
fir_pos,
fir_pos + sizeof(u32));
return err;
}
@ -793,7 +807,7 @@ long arch_ptrace(struct task_struct *child, long request,
fregs = get_fpu_regs(child);
#ifdef CONFIG_32BIT
if (test_thread_flag(TIF_32BIT_FPREGS)) {
if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) {
/*
* The odd registers are actually the high
* order bits of the values stored in the even
@ -888,7 +902,7 @@ long arch_ptrace(struct task_struct *child, long request,
init_fp_ctx(child);
#ifdef CONFIG_32BIT
if (test_thread_flag(TIF_32BIT_FPREGS)) {
if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) {
/*
* The odd registers are actually the high
* order bits of the values stored in the even

4
arch/mips/kernel/ptrace32.c
View File

@ -99,7 +99,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
break;
}
fregs = get_fpu_regs(child);
if (test_thread_flag(TIF_32BIT_FPREGS)) {
if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) {
/*
* The odd registers are actually the high
* order bits of the values stored in the even
@ -212,7 +212,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
sizeof(child->thread.fpu));
child->thread.fpu.fcr31 = 0;
}
if (test_thread_flag(TIF_32BIT_FPREGS)) {
if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) {
/*
* The odd registers are actually the high
* order bits of the values stored in the even

2
arch/mips/kvm/mips.c
View File

@ -45,7 +45,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "cache", VCPU_STAT(cache_exits), KVM_STAT_VCPU },
{ "signal", VCPU_STAT(signal_exits), KVM_STAT_VCPU },
{ "interrupt", VCPU_STAT(int_exits), KVM_STAT_VCPU },
{ "cop_unsuable", VCPU_STAT(cop_unusable_exits), KVM_STAT_VCPU },
{ "cop_unusable", VCPU_STAT(cop_unusable_exits), KVM_STAT_VCPU },
{ "tlbmod", VCPU_STAT(tlbmod_exits), KVM_STAT_VCPU },
{ "tlbmiss_ld", VCPU_STAT(tlbmiss_ld_exits), KVM_STAT_VCPU },
{ "tlbmiss_st", VCPU_STAT(tlbmiss_st_exits), KVM_STAT_VCPU },

9
arch/mips/mm/c-r4k.c
View File

@ -851,9 +851,12 @@ static void r4k_dma_cache_wback_inv(unsigned long addr, unsigned long size)
/*
* Either no secondary cache or the available caches don't have the
* subset property so we have to flush the primary caches
* explicitly
* explicitly.
* If we would need IPI to perform an INDEX-type operation, then
* we have to use the HIT-type alternative as IPI cannot be used
* here due to interrupts possibly being disabled.
*/
if (size >= dcache_size) {
if (!r4k_op_needs_ipi(R4K_INDEX) && size >= dcache_size) {
r4k_blast_dcache();
} else {
R4600_HIT_CACHEOP_WAR_IMPL;
@ -890,7 +893,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
return;
}
if (size >= dcache_size) {
if (!r4k_op_needs_ipi(R4K_INDEX) && size >= dcache_size) {
r4k_blast_dcache();
} else {
R4600_HIT_CACHEOP_WAR_IMPL;

2
arch/parisc/kernel/drivers.c
View File

@ -268,7 +268,7 @@ static struct parisc_device *find_device_by_addr(unsigned long hpa)
* Walks up the device tree looking for a device of the specified type.
* If it finds it, it returns it. If not, it returns NULL.
*/
const struct parisc_device * __init
const struct parisc_device *
find_pa_parent_type(const struct parisc_device *padev, int type)
{
const struct device *dev = &padev->dev;

3
arch/parisc/kernel/smp.c
View File

@ -423,8 +423,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
}
#ifdef CONFIG_PROC_FS
int __init
setup_profiling_timer(unsigned int multiplier)
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}

29
arch/powerpc/include/asm/exception-64s.h
View File

@ -74,6 +74,27 @@
*/
#define EX_R3 EX_DAR
#define STF_ENTRY_BARRIER_SLOT \
STF_ENTRY_BARRIER_FIXUP_SECTION; \
nop; \
nop; \
nop
#define STF_EXIT_BARRIER_SLOT \
STF_EXIT_BARRIER_FIXUP_SECTION; \
nop; \
nop; \
nop; \
nop; \
nop; \
nop
/*
* r10 must be free to use, r13 must be paca
*/
#define INTERRUPT_TO_KERNEL \
STF_ENTRY_BARRIER_SLOT
/*
* Macros for annotating the expected destination of (h)rfid
*
@ -90,16 +111,19 @@
rfid
#define RFI_TO_USER \
STF_EXIT_BARRIER_SLOT; \
RFI_FLUSH_SLOT; \
rfid; \
b rfi_flush_fallback
#define RFI_TO_USER_OR_KERNEL \
STF_EXIT_BARRIER_SLOT; \
RFI_FLUSH_SLOT; \
rfid; \
b rfi_flush_fallback
#define RFI_TO_GUEST \
STF_EXIT_BARRIER_SLOT; \
RFI_FLUSH_SLOT; \
rfid; \
b rfi_flush_fallback
@ -108,21 +132,25 @@
hrfid
#define HRFI_TO_USER \
STF_EXIT_BARRIER_SLOT; \
RFI_FLUSH_SLOT; \
hrfid; \
b hrfi_flush_fallback
#define HRFI_TO_USER_OR_KERNEL \
STF_EXIT_BARRIER_SLOT; \
RFI_FLUSH_SLOT; \
hrfid; \
b hrfi_flush_fallback
#define HRFI_TO_GUEST \
STF_EXIT_BARRIER_SLOT; \
RFI_FLUSH_SLOT; \
hrfid; \
b hrfi_flush_fallback
#define HRFI_TO_UNKNOWN \
STF_EXIT_BARRIER_SLOT; \
RFI_FLUSH_SLOT; \
hrfid; \
b hrfi_flush_fallback
@ -254,6 +282,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
#define __EXCEPTION_PROLOG_1_PRE(area) \
OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \
OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \
INTERRUPT_TO_KERNEL; \
SAVE_CTR(r10, area); \
mfcr r9;

19
arch/powerpc/include/asm/feature-fixups.h
View File

@ -187,6 +187,22 @@ label##3: \
FTR_ENTRY_OFFSET label##1b-label##3b; \
.popsection;
#define STF_ENTRY_BARRIER_FIXUP_SECTION \
953: \
.pushsection __stf_entry_barrier_fixup,"a"; \
.align 2; \
954: \
FTR_ENTRY_OFFSET 953b-954b; \
.popsection;
#define STF_EXIT_BARRIER_FIXUP_SECTION \
955: \
.pushsection __stf_exit_barrier_fixup,"a"; \
.align 2; \
956: \
FTR_ENTRY_OFFSET 955b-956b; \
.popsection;
#define RFI_FLUSH_FIXUP_SECTION \
951: \
.pushsection __rfi_flush_fixup,"a"; \
@ -199,6 +215,9 @@ label##3: \
#ifndef __ASSEMBLY__
#include <linux/types.h>
extern long stf_barrier_fallback;
extern long __start___stf_entry_barrier_fixup, __stop___stf_entry_barrier_fixup;
extern long __start___stf_exit_barrier_fixup, __stop___stf_exit_barrier_fixup;
extern long __start___rfi_flush_fixup, __stop___rfi_flush_fixup;
void apply_feature_fixups(void);

11
arch/powerpc/include/asm/security_features.h
View File

@ -12,6 +12,17 @@
extern unsigned long powerpc_security_features;
extern bool rfi_flush;
/* These are bit flags */
enum stf_barrier_type {
STF_BARRIER_NONE = 0x1,
STF_BARRIER_FALLBACK = 0x2,
STF_BARRIER_EIEIO = 0x4,
STF_BARRIER_SYNC_ORI = 0x8,
};
void setup_stf_barrier(void);
void do_stf_barrier_fixups(enum stf_barrier_type types);
static inline void security_ftr_set(unsigned long feature)
{
powerpc_security_features |= feature;

19
arch/powerpc/kernel/exceptions-64s.S
View File

@ -885,7 +885,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_TM)
#endif
EXC_REAL_MASKABLE(decrementer, 0x900, 0x80, IRQS_DISABLED)
EXC_REAL_OOL_MASKABLE(decrementer, 0x900, 0x80, IRQS_DISABLED)
EXC_VIRT_MASKABLE(decrementer, 0x4900, 0x80, 0x900, IRQS_DISABLED)
TRAMP_KVM(PACA_EXGEN, 0x900)
EXC_COMMON_ASYNC(decrementer_common, 0x900, timer_interrupt)
@ -961,6 +961,7 @@ EXC_COMMON(trap_0b_common, 0xb00, unknown_exception)
mtctr r13; \
GET_PACA(r13); \
std r10,PACA_EXGEN+EX_R10(r13); \
INTERRUPT_TO_KERNEL; \
KVMTEST_PR(0xc00); /* uses r10, branch to do_kvm_0xc00_system_call */ \
HMT_MEDIUM; \
mfctr r9;
@ -969,7 +970,8 @@ EXC_COMMON(trap_0b_common, 0xb00, unknown_exception)
#define SYSCALL_KVMTEST \
HMT_MEDIUM; \
mr r9,r13; \
GET_PACA(r13);
GET_PACA(r13); \
INTERRUPT_TO_KERNEL;
#endif
#define LOAD_SYSCALL_HANDLER(reg) \
@ -1507,6 +1509,19 @@ masked_##_H##interrupt: \
b .; \
MASKED_DEC_HANDLER(_H)
TRAMP_REAL_BEGIN(stf_barrier_fallback)
std r9,PACA_EXRFI+EX_R9(r13)
std r10,PACA_EXRFI+EX_R10(r13)
sync
ld r9,PACA_EXRFI+EX_R9(r13)
ld r10,PACA_EXRFI+EX_R10(r13)
ori 31,31,0
.rept 14
b 1f
1:
.endr
blr
TRAMP_REAL_BEGIN(rfi_flush_fallback)
SET_SCRATCH0(r13);
GET_PACA(r13);

149
arch/powerpc/kernel/security.c
View File

@ -8,6 +8,7 @@
#include <linux/device.h>
#include <linux/seq_buf.h>
#include <asm/debugfs.h>
#include <asm/security_features.h>
@ -86,3 +87,151 @@ ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, c
return s.len;
}
/*
* Store-forwarding barrier support.
*/
static enum stf_barrier_type stf_enabled_flush_types;
static bool no_stf_barrier;
bool stf_barrier;
static int __init handle_no_stf_barrier(char *p)
{
pr_info("stf-barrier: disabled on command line.");
no_stf_barrier = true;
return 0;
}
early_param("no_stf_barrier", handle_no_stf_barrier);
/* This is the generic flag used by other architectures */
static int __init handle_ssbd(char *p)
{
if (!p || strncmp(p, "auto", 5) == 0 || strncmp(p, "on", 2) == 0 ) {
/* Until firmware tells us, we have the barrier with auto */
return 0;
} else if (strncmp(p, "off", 3) == 0) {
handle_no_stf_barrier(NULL);
return 0;
} else
return 1;
return 0;
}
early_param("spec_store_bypass_disable", handle_ssbd);
/* This is the generic flag used by other architectures */
static int __init handle_no_ssbd(char *p)
{
handle_no_stf_barrier(NULL);
return 0;
}
early_param("nospec_store_bypass_disable", handle_no_ssbd);
static void stf_barrier_enable(bool enable)
{
if (enable)
do_stf_barrier_fixups(stf_enabled_flush_types);
else
do_stf_barrier_fixups(STF_BARRIER_NONE);
stf_barrier = enable;
}
void setup_stf_barrier(void)
{
enum stf_barrier_type type;
bool enable, hv;
hv = cpu_has_feature(CPU_FTR_HVMODE);
/* Default to fallback in case fw-features are not available */
if (cpu_has_feature(CPU_FTR_ARCH_300))
type = STF_BARRIER_EIEIO;
else if (cpu_has_feature(CPU_FTR_ARCH_207S))
type = STF_BARRIER_SYNC_ORI;
else if (cpu_has_feature(CPU_FTR_ARCH_206))
type = STF_BARRIER_FALLBACK;
else
type = STF_BARRIER_NONE;
enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) &&
(security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR) ||
(security_ftr_enabled(SEC_FTR_L1D_FLUSH_HV) && hv));
if (type == STF_BARRIER_FALLBACK) {
pr_info("stf-barrier: fallback barrier available\n");
} else if (type == STF_BARRIER_SYNC_ORI) {
pr_info("stf-barrier: hwsync barrier available\n");
} else if (type == STF_BARRIER_EIEIO) {
pr_info("stf-barrier: eieio barrier available\n");
}
stf_enabled_flush_types = type;
if (!no_stf_barrier)
stf_barrier_enable(enable);
}
ssize_t cpu_show_spec_store_bypass(struct device *dev, struct device_attribute *attr, char *buf)
{
if (stf_barrier && stf_enabled_flush_types != STF_BARRIER_NONE) {
const char *type;
switch (stf_enabled_flush_types) {
case STF_BARRIER_EIEIO:
type = "eieio";
break;
case STF_BARRIER_SYNC_ORI:
type = "hwsync";
break;
case STF_BARRIER_FALLBACK:
type = "fallback";
break;
default:
type = "unknown";
}
return sprintf(buf, "Mitigation: Kernel entry/exit barrier (%s)\n", type);
}
if (!security_ftr_enabled(SEC_FTR_L1D_FLUSH_HV) &&
!security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR))
return sprintf(buf, "Not affected\n");
return sprintf(buf, "Vulnerable\n");
}
#ifdef CONFIG_DEBUG_FS
static int stf_barrier_set(void *data, u64 val)
{
bool enable;
if (val == 1)
enable = true;
else if (val == 0)
enable = false;
else
return -EINVAL;
/* Only do anything if we're changing state */
if (enable != stf_barrier)
stf_barrier_enable(enable);
return 0;
}
static int stf_barrier_get(void *data, u64 *val)
{
*val = stf_barrier ? 1 : 0;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(fops_stf_barrier, stf_barrier_get, stf_barrier_set, "%llu\n");
static __init int stf_barrier_debugfs_init(void)
{
debugfs_create_file("stf_barrier", 0600, powerpc_debugfs_root, NULL, &fops_stf_barrier);
return 0;
}
device_initcall(stf_barrier_debugfs_init);
#endif /* CONFIG_DEBUG_FS */

14
arch/powerpc/kernel/vmlinux.lds.S
View File

@ -133,6 +133,20 @@ SECTIONS
RO_DATA(PAGE_SIZE)
#ifdef CONFIG_PPC64
. = ALIGN(8);
__stf_entry_barrier_fixup : AT(ADDR(__stf_entry_barrier_fixup) - LOAD_OFFSET) {
__start___stf_entry_barrier_fixup = .;
*(__stf_entry_barrier_fixup)
__stop___stf_entry_barrier_fixup = .;
}
. = ALIGN(8);
__stf_exit_barrier_fixup : AT(ADDR(__stf_exit_barrier_fixup) - LOAD_OFFSET) {
__start___stf_exit_barrier_fixup = .;
*(__stf_exit_barrier_fixup)
__stop___stf_exit_barrier_fixup = .;
}
. = ALIGN(8);
__rfi_flush_fixup : AT(ADDR(__rfi_flush_fixup) - LOAD_OFFSET) {
__start___rfi_flush_fixup = .;

115
arch/powerpc/lib/feature-fixups.c
View File

@ -23,6 +23,7 @@
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/security_features.h>
#include <asm/firmware.h>
struct fixup_entry {
@ -117,6 +118,120 @@ void do_feature_fixups(unsigned long value, void *fixup_start, void *fixup_end)
}
#ifdef CONFIG_PPC_BOOK3S_64
void do_stf_entry_barrier_fixups(enum stf_barrier_type types)
{
unsigned int instrs[3], *dest;
long *start, *end;
int i;
start = PTRRELOC(&__start___stf_entry_barrier_fixup),
end = PTRRELOC(&__stop___stf_entry_barrier_fixup);
instrs[0] = 0x60000000; /* nop */
instrs[1] = 0x60000000; /* nop */
instrs[2] = 0x60000000; /* nop */
i = 0;
if (types & STF_BARRIER_FALLBACK) {
instrs[i++] = 0x7d4802a6; /* mflr r10 */
instrs[i++] = 0x60000000; /* branch patched below */
instrs[i++] = 0x7d4803a6; /* mtlr r10 */
} else if (types & STF_BARRIER_EIEIO) {
instrs[i++] = 0x7e0006ac; /* eieio + bit 6 hint */
} else if (types & STF_BARRIER_SYNC_ORI) {
instrs[i++] = 0x7c0004ac; /* hwsync */
instrs[i++] = 0xe94d0000; /* ld r10,0(r13) */
instrs[i++] = 0x63ff0000; /* ori 31,31,0 speculation barrier */
}
for (i = 0; start < end; start++, i++) {
dest = (void *)start + *start;
pr_devel("patching dest %lx\n", (unsigned long)dest);
patch_instruction(dest, instrs[0]);
if (types & STF_BARRIER_FALLBACK)
patch_branch(dest + 1, (unsigned long)&stf_barrier_fallback,
BRANCH_SET_LINK);
else
patch_instruction(dest + 1, instrs[1]);
patch_instruction(dest + 2, instrs[2]);
}
printk(KERN_DEBUG "stf-barrier: patched %d entry locations (%s barrier)\n", i,
(types == STF_BARRIER_NONE) ? "no" :
(types == STF_BARRIER_FALLBACK) ? "fallback" :
(types == STF_BARRIER_EIEIO) ? "eieio" :
(types == (STF_BARRIER_SYNC_ORI)) ? "hwsync"
: "unknown");
}
void do_stf_exit_barrier_fixups(enum stf_barrier_type types)
{
unsigned int instrs[6], *dest;
long *start, *end;
int i;
start = PTRRELOC(&__start___stf_exit_barrier_fixup),
end = PTRRELOC(&__stop___stf_exit_barrier_fixup);
instrs[0] = 0x60000000; /* nop */
instrs[1] = 0x60000000; /* nop */
instrs[2] = 0x60000000; /* nop */
instrs[3] = 0x60000000; /* nop */
instrs[4] = 0x60000000; /* nop */
instrs[5] = 0x60000000; /* nop */
i = 0;
if (types & STF_BARRIER_FALLBACK || types & STF_BARRIER_SYNC_ORI) {
if (cpu_has_feature(CPU_FTR_HVMODE)) {
instrs[i++] = 0x7db14ba6; /* mtspr 0x131, r13 (HSPRG1) */
instrs[i++] = 0x7db04aa6; /* mfspr r13, 0x130 (HSPRG0) */
} else {
instrs[i++] = 0x7db243a6; /* mtsprg 2,r13 */
instrs[i++] = 0x7db142a6; /* mfsprg r13,1 */
}
instrs[i++] = 0x7c0004ac; /* hwsync */
instrs[i++] = 0xe9ad0000; /* ld r13,0(r13) */
instrs[i++] = 0x63ff0000; /* ori 31,31,0 speculation barrier */
if (cpu_has_feature(CPU_FTR_HVMODE)) {
instrs[i++] = 0x7db14aa6; /* mfspr r13, 0x131 (HSPRG1) */
} else {
instrs[i++] = 0x7db242a6; /* mfsprg r13,2 */
}
} else if (types & STF_BARRIER_EIEIO) {
instrs[i++] = 0x7e0006ac; /* eieio + bit 6 hint */
}
for (i = 0; start < end; start++, i++) {
dest = (void *)start + *start;
pr_devel("patching dest %lx\n", (unsigned long)dest);
patch_instruction(dest, instrs[0]);
patch_instruction(dest + 1, instrs[1]);
patch_instruction(dest + 2, instrs[2]);
patch_instruction(dest + 3, instrs[3]);
patch_instruction(dest + 4, instrs[4]);
patch_instruction(dest + 5, instrs[5]);
}
printk(KERN_DEBUG "stf-barrier: patched %d exit locations (%s barrier)\n", i,
(types == STF_BARRIER_NONE) ? "no" :
(types == STF_BARRIER_FALLBACK) ? "fallback" :
(types == STF_BARRIER_EIEIO) ? "eieio" :
(types == (STF_BARRIER_SYNC_ORI)) ? "hwsync"
: "unknown");
}
void do_stf_barrier_fixups(enum stf_barrier_type types)
{
do_stf_entry_barrier_fixups(types);
do_stf_exit_barrier_fixups(types);
}
void do_rfi_flush_fixups(enum l1d_flush_type types)
{
unsigned int instrs[3], *dest;

14
arch/powerpc/platforms/powernv/opal-nvram.c
View File

@ -44,6 +44,10 @@ static ssize_t opal_nvram_read(char *buf, size_t count, loff_t *index)
return count;
}
/*
* This can be called in the panic path with interrupts off, so use
* mdelay in that case.
*/
static ssize_t opal_nvram_write(char *buf, size_t count, loff_t *index)
{
s64 rc = OPAL_BUSY;
@ -58,10 +62,16 @@ static ssize_t opal_nvram_write(char *buf, size_t count, loff_t *index)
while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
rc = opal_write_nvram(__pa(buf), count, off);
if (rc == OPAL_BUSY_EVENT) {
msleep(OPAL_BUSY_DELAY_MS);
if (in_interrupt() || irqs_disabled())
mdelay(OPAL_BUSY_DELAY_MS);
else
msleep(OPAL_BUSY_DELAY_MS);
opal_poll_events(NULL);
} else if (rc == OPAL_BUSY) {
msleep(OPAL_BUSY_DELAY_MS);
if (in_interrupt() || irqs_disabled())
mdelay(OPAL_BUSY_DELAY_MS);
else
msleep(OPAL_BUSY_DELAY_MS);
}
}

1
arch/powerpc/platforms/powernv/setup.c
View File

@ -131,6 +131,7 @@ static void __init pnv_setup_arch(void)
set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT);
pnv_setup_rfi_flush();
setup_stf_barrier();
/* Initialize SMP */
pnv_smp_init();

1
arch/powerpc/platforms/pseries/setup.c
View File

@ -710,6 +710,7 @@ static void __init pSeries_setup_arch(void)
fwnmi_init();
pseries_setup_rfi_flush();
setup_stf_barrier();
/* By default, only probe PCI (can be overridden by rtas_pci) */
pci_add_flags(PCI_PROBE_ONLY);

9
arch/s390/configs/debug_defconfig
View File

@ -261,9 +261,9 @@ CONFIG_IP_VS_NQ=m
CONFIG_IP_VS_FTP=m
CONFIG_IP_VS_PE_SIP=m
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_NF_TABLES_IPV4=m
CONFIG_NF_TABLES_IPV4=y
CONFIG_NFT_CHAIN_ROUTE_IPV4=m
CONFIG_NF_TABLES_ARP=m
CONFIG_NF_TABLES_ARP=y
CONFIG_NFT_CHAIN_NAT_IPV4=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_AH=m
@ -284,7 +284,7 @@ CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
CONFIG_NF_CONNTRACK_IPV6=m
CONFIG_NF_TABLES_IPV6=m
CONFIG_NF_TABLES_IPV6=y
CONFIG_NFT_CHAIN_ROUTE_IPV6=m
CONFIG_NFT_CHAIN_NAT_IPV6=m
CONFIG_IP6_NF_IPTABLES=m
@ -305,7 +305,7 @@ CONFIG_IP6_NF_RAW=m
CONFIG_IP6_NF_SECURITY=m
CONFIG_IP6_NF_NAT=m
CONFIG_IP6_NF_TARGET_MASQUERADE=m
CONFIG_NF_TABLES_BRIDGE=m
CONFIG_NF_TABLES_BRIDGE=y
CONFIG_RDS=m
CONFIG_RDS_RDMA=m
CONFIG_RDS_TCP=m
@ -604,7 +604,6 @@ CONFIG_DETECT_HUNG_TASK=y
CONFIG_WQ_WATCHDOG=y
CONFIG_PANIC_ON_OOPS=y
CONFIG_DEBUG_TIMEKEEPING=y
CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y
CONFIG_PROVE_LOCKING=y
CONFIG_LOCK_STAT=y
CONFIG_DEBUG_LOCKDEP=y

8
arch/s390/configs/performance_defconfig
View File

@ -259,9 +259,9 @@ CONFIG_IP_VS_NQ=m
CONFIG_IP_VS_FTP=m
CONFIG_IP_VS_PE_SIP=m
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_NF_TABLES_IPV4=m
CONFIG_NF_TABLES_IPV4=y
CONFIG_NFT_CHAIN_ROUTE_IPV4=m
CONFIG_NF_TABLES_ARP=m
CONFIG_NF_TABLES_ARP=y
CONFIG_NFT_CHAIN_NAT_IPV4=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_AH=m
@ -282,7 +282,7 @@ CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
CONFIG_NF_CONNTRACK_IPV6=m
CONFIG_NF_TABLES_IPV6=m
CONFIG_NF_TABLES_IPV6=y
CONFIG_NFT_CHAIN_ROUTE_IPV6=m
CONFIG_NFT_CHAIN_NAT_IPV6=m
CONFIG_IP6_NF_IPTABLES=m
@ -303,7 +303,7 @@ CONFIG_IP6_NF_RAW=m
CONFIG_IP6_NF_SECURITY=m
CONFIG_IP6_NF_NAT=m
CONFIG_IP6_NF_TARGET_MASQUERADE=m
CONFIG_NF_TABLES_BRIDGE=m
CONFIG_NF_TABLES_BRIDGE=y
CONFIG_RDS=m
CONFIG_RDS_RDMA=m
CONFIG_RDS_TCP=m

5
arch/s390/crypto/crc32be-vx.S
View File

@ -13,6 +13,7 @@
*/
#include <linux/linkage.h>
#include <asm/nospec-insn.h>
#include <asm/vx-insn.h>
/* Vector register range containing CRC-32 constants */
@ -67,6 +68,8 @@
.previous
GEN_BR_THUNK %r14
.text
/*
* The CRC-32 function(s) use these calling conventions:
@ -203,6 +206,6 @@ ENTRY(crc32_be_vgfm_16)
.Ldone:
VLGVF %r2,%v2,3
br %r14
BR_EX %r14
.previous

4
arch/s390/crypto/crc32le-vx.S
View File

@ -14,6 +14,7 @@
*/
#include <linux/linkage.h>
#include <asm/nospec-insn.h>
#include <asm/vx-insn.h>
/* Vector register range containing CRC-32 constants */
@ -76,6 +77,7 @@
.previous
GEN_BR_THUNK %r14
.text
@ -264,6 +266,6 @@ crc32_le_vgfm_generic:
.Ldone:
VLGVF %r2,%v2,2
br %r14
BR_EX %r14
.previous

196
arch/s390/include/asm/nospec-insn.h Normal file
View File

@ -0,0 +1,196 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_NOSPEC_ASM_H
#define _ASM_S390_NOSPEC_ASM_H
#include <asm/alternative-asm.h>
#include <asm/asm-offsets.h>
#include <asm/dwarf.h>
#ifdef __ASSEMBLY__
#ifdef CONFIG_EXPOLINE
_LC_BR_R1 = __LC_BR_R1
/*
* The expoline macros are used to create thunks in the same format
* as gcc generates them. The 'comdat' section flag makes sure that
* the various thunks are merged into a single copy.
*/
.macro __THUNK_PROLOG_NAME name
.pushsection .text.\name,"axG",@progbits,\name,comdat
.globl \name
.hidden \name
.type \name,@function
\name:
CFI_STARTPROC
.endm
.macro __THUNK_EPILOG
CFI_ENDPROC
.popsection
.endm
.macro __THUNK_PROLOG_BR r1,r2
__THUNK_PROLOG_NAME __s390x_indirect_jump_r\r2\()use_r\r1
.endm
.macro __THUNK_PROLOG_BC d0,r1,r2
__THUNK_PROLOG_NAME __s390x_indirect_branch_\d0\()_\r2\()use_\r1
.endm
.macro __THUNK_BR r1,r2
jg __s390x_indirect_jump_r\r2\()use_r\r1
.endm
.macro __THUNK_BC d0,r1,r2
jg __s390x_indirect_branch_\d0\()_\r2\()use_\r1
.endm
.macro __THUNK_BRASL r1,r2,r3
brasl \r1,__s390x_indirect_jump_r\r3\()use_r\r2
.endm
.macro __DECODE_RR expand,reg,ruse
.set __decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \reg,%r\r1
.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \ruse,%r\r2
\expand \r1,\r2
.set __decode_fail,0
.endif
.endr
.endif
.endr
.if __decode_fail == 1
.error "__DECODE_RR failed"
.endif
.endm
.macro __DECODE_RRR expand,rsave,rtarget,ruse
.set __decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \rsave,%r\r1
.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \rtarget,%r\r2
.irp r3,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \ruse,%r\r3
\expand \r1,\r2,\r3
.set __decode_fail,0
.endif
.endr
.endif
.endr
.endif
.endr
.if __decode_fail == 1
.error "__DECODE_RRR failed"
.endif
.endm
.macro __DECODE_DRR expand,disp,reg,ruse
.set __decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \reg,%r\r1
.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \ruse,%r\r2
\expand \disp,\r1,\r2
.set __decode_fail,0
.endif
.endr
.endif
.endr
.if __decode_fail == 1
.error "__DECODE_DRR failed"
.endif
.endm
.macro __THUNK_EX_BR reg,ruse
# Be very careful when adding instructions to this macro!
# The ALTERNATIVE replacement code has a .+10 which targets
# the "br \reg" after the code has been patched.
#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
exrl 0,555f
j .
#else
.ifc \reg,%r1
ALTERNATIVE "ex %r0,_LC_BR_R1", ".insn ril,0xc60000000000,0,.+10", 35
j .
.else
larl \ruse,555f
ex 0,0(\ruse)
j .
.endif
#endif
555: br \reg
.endm
.macro __THUNK_EX_BC disp,reg,ruse
#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
exrl 0,556f
j .
#else
larl \ruse,556f
ex 0,0(\ruse)
j .
#endif
556: b \disp(\reg)
.endm
.macro GEN_BR_THUNK reg,ruse=%r1
__DECODE_RR __THUNK_PROLOG_BR,\reg,\ruse
__THUNK_EX_BR \reg,\ruse
__THUNK_EPILOG
.endm
.macro GEN_B_THUNK disp,reg,ruse=%r1
__DECODE_DRR __THUNK_PROLOG_BC,\disp,\reg,\ruse
__THUNK_EX_BC \disp,\reg,\ruse
__THUNK_EPILOG
.endm
.macro BR_EX reg,ruse=%r1
557: __DECODE_RR __THUNK_BR,\reg,\ruse
.pushsection .s390_indirect_branches,"a",@progbits
.long 557b-.
.popsection
.endm
.macro B_EX disp,reg,ruse=%r1
558: __DECODE_DRR __THUNK_BC,\disp,\reg,\ruse
.pushsection .s390_indirect_branches,"a",@progbits
.long 558b-.
.popsection
.endm
.macro BASR_EX rsave,rtarget,ruse=%r1
559: __DECODE_RRR __THUNK_BRASL,\rsave,\rtarget,\ruse
.pushsection .s390_indirect_branches,"a",@progbits
.long 559b-.
.popsection
.endm
#else
.macro GEN_BR_THUNK reg,ruse=%r1
.endm
.macro GEN_B_THUNK disp,reg,ruse=%r1
.endm
.macro BR_EX reg,ruse=%r1
br \reg
.endm
.macro B_EX disp,reg,ruse=%r1
b \disp(\reg)
.endm
.macro BASR_EX rsave,rtarget,ruse=%r1
basr \rsave,\rtarget
.endm
#endif
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_NOSPEC_ASM_H */

6
arch/s390/include/asm/purgatory.h
View File

@ -13,5 +13,11 @@
int verify_sha256_digest(void);
extern u64 kernel_entry;
extern u64 kernel_type;
extern u64 crash_start;
extern u64 crash_size;
#endif /* __ASSEMBLY__ */
#endif /* _S390_PURGATORY_H_ */

1
arch/s390/kernel/Makefile
View File

@ -65,6 +65,7 @@ obj-y += nospec-branch.o
extra-y += head.o head64.o vmlinux.lds
obj-$(CONFIG_SYSFS) += nospec-sysfs.o
CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE)
obj-$(CONFIG_MODULES) += module.o

1
arch/s390/kernel/asm-offsets.c
View File

@ -181,6 +181,7 @@ int main(void)
OFFSET(__LC_MACHINE_FLAGS, lowcore, machine_flags);
OFFSET(__LC_PREEMPT_COUNT, lowcore, preempt_count);
OFFSET(__LC_GMAP, lowcore, gmap);
OFFSET(__LC_BR_R1, lowcore, br_r1_trampoline);
/* software defined ABI-relevant lowcore locations 0xe00 - 0xe20 */
OFFSET(__LC_DUMP_REIPL, lowcore, ipib);
/* hardware defined lowcore locations 0x1000 - 0x18ff */

24
arch/s390/kernel/base.S
View File

@ -9,18 +9,22 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/nospec-insn.h>
#include <asm/ptrace.h>
#include <asm/sigp.h>
GEN_BR_THUNK %r9
GEN_BR_THUNK %r14
ENTRY(s390_base_mcck_handler)
basr %r13,0
0: lg %r15,__LC_PANIC_STACK # load panic stack
aghi %r15,-STACK_FRAME_OVERHEAD
larl %r1,s390_base_mcck_handler_fn
lg %r1,0(%r1)
ltgr %r1,%r1
lg %r9,0(%r1)
ltgr %r9,%r9
jz 1f
basr %r14,%r1
BASR_EX %r14,%r9
1: la %r1,4095
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
lpswe __LC_MCK_OLD_PSW
@ -37,10 +41,10 @@ ENTRY(s390_base_ext_handler)
basr %r13,0
0: aghi %r15,-STACK_FRAME_OVERHEAD
larl %r1,s390_base_ext_handler_fn
lg %r1,0(%r1)
ltgr %r1,%r1
lg %r9,0(%r1)
ltgr %r9,%r9
jz 1f
basr %r14,%r1
BASR_EX %r14,%r9
1: lmg %r0,%r15,__LC_SAVE_AREA_ASYNC
ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
lpswe __LC_EXT_OLD_PSW
@ -57,10 +61,10 @@ ENTRY(s390_base_pgm_handler)
basr %r13,0
0: aghi %r15,-STACK_FRAME_OVERHEAD
larl %r1,s390_base_pgm_handler_fn
lg %r1,0(%r1)
ltgr %r1,%r1
lg %r9,0(%r1)
ltgr %r9,%r9
jz 1f
basr %r14,%r1
BASR_EX %r14,%r9
lmg %r0,%r15,__LC_SAVE_AREA_SYNC
lpswe __LC_PGM_OLD_PSW
1: lpswe disabled_wait_psw-0b(%r13)
@ -117,7 +121,7 @@ ENTRY(diag308_reset)
larl %r4,.Lcontinue_psw # Restore PSW flags
lpswe 0(%r4)
.Lcontinue:
br %r14
BR_EX %r14
.align 16
.Lrestart_psw:
.long 0x00080000,0x80000000 + .Lrestart_part2

105
arch/s390/kernel/entry.S
View File

@ -28,6 +28,7 @@
#include <asm/setup.h>
#include <asm/nmi.h>
#include <asm/export.h>
#include <asm/nospec-insn.h>
__PT_R0 = __PT_GPRS
__PT_R1 = __PT_GPRS + 8
@ -183,67 +184,9 @@ _LPP_OFFSET = __LC_LPP
"jnz .+8; .long 0xb2e8d000", 82
.endm
#ifdef CONFIG_EXPOLINE
.macro GEN_BR_THUNK name,reg,tmp
.section .text.\name,"axG",@progbits,\name,comdat
.globl \name
.hidden \name
.type \name,@function
\name:
CFI_STARTPROC
#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
exrl 0,0f
#else
larl \tmp,0f
ex 0,0(\tmp)
#endif
j .
0: br \reg
CFI_ENDPROC
.endm
GEN_BR_THUNK __s390x_indirect_jump_r1use_r9,%r9,%r1
GEN_BR_THUNK __s390x_indirect_jump_r1use_r14,%r14,%r1
GEN_BR_THUNK __s390x_indirect_jump_r11use_r14,%r14,%r11
.macro BASR_R14_R9
0: brasl %r14,__s390x_indirect_jump_r1use_r9
.pushsection .s390_indirect_branches,"a",@progbits
.long 0b-.
.popsection
.endm
.macro BR_R1USE_R14
0: jg __s390x_indirect_jump_r1use_r14
.pushsection .s390_indirect_branches,"a",@progbits
.long 0b-.
.popsection
.endm
.macro BR_R11USE_R14
0: jg __s390x_indirect_jump_r11use_r14
.pushsection .s390_indirect_branches,"a",@progbits
.long 0b-.
.popsection
.endm
#else /* CONFIG_EXPOLINE */
.macro BASR_R14_R9
basr %r14,%r9
.endm
.macro BR_R1USE_R14
br %r14
.endm
.macro BR_R11USE_R14
br %r14
.endm
#endif /* CONFIG_EXPOLINE */
GEN_BR_THUNK %r9
GEN_BR_THUNK %r14
GEN_BR_THUNK %r14,%r11
.section .kprobes.text, "ax"
.Ldummy:
@ -260,7 +203,7 @@ _LPP_OFFSET = __LC_LPP
ENTRY(__bpon)
.globl __bpon
BPON
BR_R1USE_R14
BR_EX %r14
/*
* Scheduler resume function, called by switch_to
@ -284,7 +227,7 @@ ENTRY(__switch_to)
mvc __LC_CURRENT_PID(4,%r0),0(%r3) # store pid of next
lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
ALTERNATIVE "", ".insn s,0xb2800000,_LPP_OFFSET", 40
BR_R1USE_R14
BR_EX %r14
.L__critical_start:
@ -351,7 +294,7 @@ sie_exit:
xgr %r5,%r5
lmg %r6,%r14,__SF_GPRS(%r15) # restore kernel registers
lg %r2,__SF_SIE_REASON(%r15) # return exit reason code
BR_R1USE_R14
BR_EX %r14
.Lsie_fault:
lghi %r14,-EFAULT
stg %r14,__SF_SIE_REASON(%r15) # set exit reason code
@ -410,7 +353,7 @@ ENTRY(system_call)
lgf %r9,0(%r8,%r10) # get system call add.
TSTMSK __TI_flags(%r12),_TIF_TRACE
jnz .Lsysc_tracesys
BASR_R14_R9 # call sys_xxxx
BASR_EX %r14,%r9 # call sys_xxxx
stg %r2,__PT_R2(%r11) # store return value
.Lsysc_return:
@ -595,7 +538,7 @@ ENTRY(system_call)
lmg %r3,%r7,__PT_R3(%r11)
stg %r7,STACK_FRAME_OVERHEAD(%r15)
lg %r2,__PT_ORIG_GPR2(%r11)
BASR_R14_R9 # call sys_xxx
BASR_EX %r14,%r9 # call sys_xxx
stg %r2,__PT_R2(%r11) # store return value
.Lsysc_tracenogo:
TSTMSK __TI_flags(%r12),_TIF_TRACE
@ -619,7 +562,7 @@ ENTRY(ret_from_fork)
lmg %r9,%r10,__PT_R9(%r11) # load gprs
ENTRY(kernel_thread_starter)
la %r2,0(%r10)
BASR_R14_R9
BASR_EX %r14,%r9
j .Lsysc_tracenogo
/*
@ -701,7 +644,7 @@ ENTRY(pgm_check_handler)
je .Lpgm_return
lgf %r9,0(%r10,%r1) # load address of handler routine
lgr %r2,%r11 # pass pointer to pt_regs
BASR_R14_R9 # branch to interrupt-handler
BASR_EX %r14,%r9 # branch to interrupt-handler
.Lpgm_return:
LOCKDEP_SYS_EXIT
tm __PT_PSW+1(%r11),0x01 # returning to user ?
@ -1019,7 +962,7 @@ ENTRY(psw_idle)
stpt __TIMER_IDLE_ENTER(%r2)
.Lpsw_idle_lpsw:
lpswe __SF_EMPTY(%r15)
BR_R1USE_R14
BR_EX %r14
.Lpsw_idle_end:
/*
@ -1061,7 +1004,7 @@ ENTRY(save_fpu_regs)
.Lsave_fpu_regs_done:
oi __LC_CPU_FLAGS+7,_CIF_FPU
.Lsave_fpu_regs_exit:
BR_R1USE_R14
BR_EX %r14
.Lsave_fpu_regs_end:
EXPORT_SYMBOL(save_fpu_regs)
@ -1107,7 +1050,7 @@ load_fpu_regs:
.Lload_fpu_regs_done:
ni __LC_CPU_FLAGS+7,255-_CIF_FPU
.Lload_fpu_regs_exit:
BR_R1USE_R14
BR_EX %r14
.Lload_fpu_regs_end:
.L__critical_end:
@ -1322,7 +1265,7 @@ cleanup_critical:
jl 0f
clg %r9,BASED(.Lcleanup_table+104) # .Lload_fpu_regs_end
jl .Lcleanup_load_fpu_regs
0: BR_R11USE_R14
0: BR_EX %r14
.align 8
.Lcleanup_table:
@ -1358,7 +1301,7 @@ cleanup_critical:
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
larl %r9,sie_exit # skip forward to sie_exit
BR_R11USE_R14
BR_EX %r14
#endif
.Lcleanup_system_call:
@ -1412,7 +1355,7 @@ cleanup_critical:
stg %r15,56(%r11) # r15 stack pointer
# set new psw address and exit
larl %r9,.Lsysc_do_svc
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_system_call_insn:
.quad system_call
.quad .Lsysc_stmg
@ -1424,7 +1367,7 @@ cleanup_critical:
.Lcleanup_sysc_tif:
larl %r9,.Lsysc_tif
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_sysc_restore:
# check if stpt has been executed
@ -1441,14 +1384,14 @@ cleanup_critical:
mvc 0(64,%r11),__PT_R8(%r9)
lmg %r0,%r7,__PT_R0(%r9)
1: lmg %r8,%r9,__LC_RETURN_PSW
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_sysc_restore_insn:
.quad .Lsysc_exit_timer
.quad .Lsysc_done - 4
.Lcleanup_io_tif:
larl %r9,.Lio_tif
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_io_restore:
# check if stpt has been executed
@ -1462,7 +1405,7 @@ cleanup_critical:
mvc 0(64,%r11),__PT_R8(%r9)
lmg %r0,%r7,__PT_R0(%r9)
1: lmg %r8,%r9,__LC_RETURN_PSW
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_io_restore_insn:
.quad .Lio_exit_timer
.quad .Lio_done - 4
@ -1515,17 +1458,17 @@ cleanup_critical:
# prepare return psw
nihh %r8,0xfcfd # clear irq & wait state bits
lg %r9,48(%r11) # return from psw_idle
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_idle_insn:
.quad .Lpsw_idle_lpsw
.Lcleanup_save_fpu_regs:
larl %r9,save_fpu_regs
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_load_fpu_regs:
larl %r9,load_fpu_regs
BR_R11USE_R14
BR_EX %r14,%r11
/*
* Integer constants

5
arch/s390/kernel/irq.c
View File

@ -176,10 +176,9 @@ void do_softirq_own_stack(void)
new -= STACK_FRAME_OVERHEAD;
((struct stack_frame *) new)->back_chain = old;
asm volatile(" la 15,0(%0)\n"
" basr 14,%2\n"
" brasl 14,__do_softirq\n"
" la 15,0(%1)\n"
: : "a" (new), "a" (old),
"a" (__do_softirq)
: : "a" (new), "a" (old)
: "0", "1", "2", "3", "4", "5", "14",
"cc", "memory" );
} else {

14
arch/s390/kernel/mcount.S
View File

@ -9,13 +9,17 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/ftrace.h>
#include <asm/nospec-insn.h>
#include <asm/ptrace.h>
#include <asm/export.h>
GEN_BR_THUNK %r1
GEN_BR_THUNK %r14
.section .kprobes.text, "ax"
ENTRY(ftrace_stub)
br %r14
BR_EX %r14
#define STACK_FRAME_SIZE (STACK_FRAME_OVERHEAD + __PT_SIZE)
#define STACK_PTREGS (STACK_FRAME_OVERHEAD)
@ -23,7 +27,7 @@ ENTRY(ftrace_stub)
#define STACK_PTREGS_PSW (STACK_PTREGS + __PT_PSW)
ENTRY(_mcount)
br %r14
BR_EX %r14
EXPORT_SYMBOL(_mcount)
@ -53,7 +57,7 @@ ENTRY(ftrace_caller)
#endif
lgr %r3,%r14
la %r5,STACK_PTREGS(%r15)
basr %r14,%r1
BASR_EX %r14,%r1
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
# The j instruction gets runtime patched to a nop instruction.
# See ftrace_enable_ftrace_graph_caller.
@ -68,7 +72,7 @@ ftrace_graph_caller_end:
#endif
lg %r1,(STACK_PTREGS_PSW+8)(%r15)
lmg %r2,%r15,(STACK_PTREGS_GPRS+2*8)(%r15)
br %r1
BR_EX %r1
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
@ -81,6 +85,6 @@ ENTRY(return_to_handler)
aghi %r15,STACK_FRAME_OVERHEAD
lgr %r14,%r2
lmg %r2,%r5,32(%r15)
br %r14
BR_EX %r14
#endif

44
arch/s390/kernel/nospec-branch.c
View File

@ -1,7 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/module.h>
#include <linux/device.h>
#include <linux/cpu.h>
#include <asm/nospec-branch.h>
static int __init nobp_setup_early(char *str)
@ -44,24 +43,6 @@ static int __init nospec_report(void)
}
arch_initcall(nospec_report);
#ifdef CONFIG_SYSFS
ssize_t cpu_show_spectre_v1(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "Mitigation: __user pointer sanitization\n");
}
ssize_t cpu_show_spectre_v2(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable)
return sprintf(buf, "Mitigation: execute trampolines\n");
if (__test_facility(82, S390_lowcore.alt_stfle_fac_list))
return sprintf(buf, "Mitigation: limited branch prediction.\n");
return sprintf(buf, "Vulnerable\n");
}
#endif
#ifdef CONFIG_EXPOLINE
int nospec_disable = IS_ENABLED(CONFIG_EXPOLINE_OFF);
@ -112,7 +93,6 @@ static void __init_or_module __nospec_revert(s32 *start, s32 *end)
s32 *epo;
/* Second part of the instruction replace is always a nop */
memcpy(insnbuf + 2, (char[]) { 0x47, 0x00, 0x00, 0x00 }, 4);
for (epo = start; epo < end; epo++) {
instr = (u8 *) epo + *epo;
if (instr[0] == 0xc0 && (instr[1] & 0x0f) == 0x04)
@ -133,18 +113,34 @@ static void __init_or_module __nospec_revert(s32 *start, s32 *end)
br = thunk + (*(int *)(thunk + 2)) * 2;
else
continue;
if (br[0] != 0x07 || (br[1] & 0xf0) != 0xf0)
/* Check for unconditional branch 0x07f? or 0x47f???? */
if ((br[0] & 0xbf) != 0x07 || (br[1] & 0xf0) != 0xf0)
continue;
memcpy(insnbuf + 2, (char[]) { 0x47, 0x00, 0x07, 0x00 }, 4);
switch (type) {
case BRCL_EXPOLINE:
/* brcl to thunk, replace with br + nop */
insnbuf[0] = br[0];
insnbuf[1] = (instr[1] & 0xf0) | (br[1] & 0x0f);
if (br[0] == 0x47) {
/* brcl to b, replace with bc + nopr */
insnbuf[2] = br[2];
insnbuf[3] = br[3];
} else {
/* brcl to br, replace with bcr + nop */
}
break;
case BRASL_EXPOLINE:
/* brasl to thunk, replace with basr + nop */
insnbuf[0] = 0x0d;
insnbuf[1] = (instr[1] & 0xf0) | (br[1] & 0x0f);
if (br[0] == 0x47) {
/* brasl to b, replace with bas + nopr */
insnbuf[0] = 0x4d;
insnbuf[2] = br[2];
insnbuf[3] = br[3];
} else {
/* brasl to br, replace with basr + nop */
insnbuf[0] = 0x0d;
}
break;
}

21
arch/s390/kernel/nospec-sysfs.c Normal file
View File

@ -0,0 +1,21 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/device.h>
#include <linux/cpu.h>
#include <asm/facility.h>
#include <asm/nospec-branch.h>
ssize_t cpu_show_spectre_v1(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "Mitigation: __user pointer sanitization\n");
}
ssize_t cpu_show_spectre_v2(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable)
return sprintf(buf, "Mitigation: execute trampolines\n");
if (__test_facility(82, S390_lowcore.alt_stfle_fac_list))
return sprintf(buf, "Mitigation: limited branch prediction\n");
return sprintf(buf, "Vulnerable\n");
}

4
arch/s390/kernel/perf_cpum_sf.c
View File

@ -753,6 +753,10 @@ static int __hw_perf_event_init(struct perf_event *event)
*/
rate = 0;
if (attr->freq) {
if (!attr->sample_freq) {
err = -EINVAL;
goto out;
}
rate = freq_to_sample_rate(&si, attr->sample_freq);
rate = hw_limit_rate(&si, rate);
attr->freq = 0;

7
arch/s390/kernel/reipl.S
View File

@ -7,8 +7,11 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/nospec-insn.h>
#include <asm/sigp.h>
GEN_BR_THUNK %r9
#
# Issue "store status" for the current CPU to its prefix page
# and call passed function afterwards
@ -67,9 +70,9 @@ ENTRY(store_status)
st %r4,0(%r1)
st %r5,4(%r1)
stg %r2,8(%r1)
lgr %r1,%r2
lgr %r9,%r2
lgr %r2,%r3
br %r1
BR_EX %r9
.section .bss
.align 8

10
arch/s390/kernel/swsusp.S
View File

@ -13,6 +13,7 @@
#include <asm/ptrace.h>
#include <asm/thread_info.h>
#include <asm/asm-offsets.h>
#include <asm/nospec-insn.h>
#include <asm/sigp.h>
/*
@ -24,6 +25,8 @@
* (see below) in the resume process.
* This function runs with disabled interrupts.
*/
GEN_BR_THUNK %r14
.section .text
ENTRY(swsusp_arch_suspend)
stmg %r6,%r15,__SF_GPRS(%r15)
@ -103,7 +106,7 @@ ENTRY(swsusp_arch_suspend)
spx 0x318(%r1)
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
lghi %r2,0
br %r14
BR_EX %r14
/*
* Restore saved memory image to correct place and restore register context.
@ -197,11 +200,10 @@ pgm_check_entry:
larl %r15,init_thread_union
ahi %r15,1<<(PAGE_SHIFT+THREAD_SIZE_ORDER)
larl %r2,.Lpanic_string
larl %r3,sclp_early_printk
lghi %r1,0
sam31
sigp %r1,%r0,SIGP_SET_ARCHITECTURE
basr %r14,%r3
brasl %r14,sclp_early_printk
larl %r3,.Ldisabled_wait_31
lpsw 0(%r3)
4:
@ -267,7 +269,7 @@ restore_registers:
/* Return 0 */
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
lghi %r2,0
br %r14
BR_EX %r14
.section .data..nosave,"aw",@progbits
.align 8

19
arch/s390/lib/mem.S
View File

@ -7,6 +7,9 @@
#include <linux/linkage.h>
#include <asm/export.h>
#include <asm/nospec-insn.h>
GEN_BR_THUNK %r14
/*
* void *memmove(void *dest, const void *src, size_t n)
@ -33,14 +36,14 @@ ENTRY(memmove)
.Lmemmove_forward_remainder:
larl %r5,.Lmemmove_mvc
ex %r4,0(%r5)
br %r14
BR_EX %r14
.Lmemmove_reverse:
ic %r0,0(%r4,%r3)
stc %r0,0(%r4,%r1)
brctg %r4,.Lmemmove_reverse
ic %r0,0(%r4,%r3)
stc %r0,0(%r4,%r1)
br %r14
BR_EX %r14
.Lmemmove_mvc:
mvc 0(1,%r1),0(%r3)
EXPORT_SYMBOL(memmove)
@ -77,7 +80,7 @@ ENTRY(memset)
.Lmemset_clear_remainder:
larl %r3,.Lmemset_xc
ex %r4,0(%r3)
br %r14
BR_EX %r14
.Lmemset_fill:
cghi %r4,1
lgr %r1,%r2
@ -95,10 +98,10 @@ ENTRY(memset)
stc %r3,0(%r1)
larl %r5,.Lmemset_mvc
ex %r4,0(%r5)
br %r14
BR_EX %r14
.Lmemset_fill_exit:
stc %r3,0(%r1)
br %r14
BR_EX %r14
.Lmemset_xc:
xc 0(1,%r1),0(%r1)
.Lmemset_mvc:
@ -121,7 +124,7 @@ ENTRY(memcpy)
.Lmemcpy_remainder:
larl %r5,.Lmemcpy_mvc
ex %r4,0(%r5)
br %r14
BR_EX %r14
.Lmemcpy_loop:
mvc 0(256,%r1),0(%r3)
la %r1,256(%r1)
@ -159,10 +162,10 @@ ENTRY(__memset\bits)
\insn %r3,0(%r1)
larl %r5,.L__memset_mvc\bits
ex %r4,0(%r5)
br %r14
BR_EX %r14
.L__memset_exit\bits:
\insn %r3,0(%r2)
br %r14
BR_EX %r14
.L__memset_mvc\bits:
mvc \bytes(1,%r1),0(%r1)
.endm

16
arch/s390/net/bpf_jit.S
View File

@ -9,6 +9,7 @@
*/
#include <linux/linkage.h>
#include <asm/nospec-insn.h>
#include "bpf_jit.h"
/*
@ -54,7 +55,7 @@ ENTRY(sk_load_##NAME##_pos); \
clg %r3,STK_OFF_HLEN(%r15); /* Offset + SIZE > hlen? */ \
jh sk_load_##NAME##_slow; \
LOAD %r14,-SIZE(%r3,%r12); /* Get data from skb */ \
b OFF_OK(%r6); /* Return */ \
B_EX OFF_OK,%r6; /* Return */ \
\
sk_load_##NAME##_slow:; \
lgr %r2,%r7; /* Arg1 = skb pointer */ \
@ -64,11 +65,14 @@ sk_load_##NAME##_slow:; \
brasl %r14,skb_copy_bits; /* Get data from skb */ \
LOAD %r14,STK_OFF_TMP(%r15); /* Load from temp bufffer */ \
ltgr %r2,%r2; /* Set cc to (%r2 != 0) */ \
br %r6; /* Return */
BR_EX %r6; /* Return */
sk_load_common(word, 4, llgf) /* r14 = *(u32 *) (skb->data+offset) */
sk_load_common(half, 2, llgh) /* r14 = *(u16 *) (skb->data+offset) */
GEN_BR_THUNK %r6
GEN_B_THUNK OFF_OK,%r6
/*
* Load 1 byte from SKB (optimized version)
*/
@ -80,7 +84,7 @@ ENTRY(sk_load_byte_pos)
clg %r3,STK_OFF_HLEN(%r15) # Offset >= hlen?
jnl sk_load_byte_slow
llgc %r14,0(%r3,%r12) # Get byte from skb
b OFF_OK(%r6) # Return OK
B_EX OFF_OK,%r6 # Return OK
sk_load_byte_slow:
lgr %r2,%r7 # Arg1 = skb pointer
@ -90,7 +94,7 @@ sk_load_byte_slow:
brasl %r14,skb_copy_bits # Get data from skb
llgc %r14,STK_OFF_TMP(%r15) # Load result from temp buffer
ltgr %r2,%r2 # Set cc to (%r2 != 0)
br %r6 # Return cc
BR_EX %r6 # Return cc
#define sk_negative_common(NAME, SIZE, LOAD) \
sk_load_##NAME##_slow_neg:; \
@ -104,7 +108,7 @@ sk_load_##NAME##_slow_neg:; \
jz bpf_error; \
LOAD %r14,0(%r2); /* Get data from pointer */ \
xr %r3,%r3; /* Set cc to zero */ \
br %r6; /* Return cc */
BR_EX %r6; /* Return cc */
sk_negative_common(word, 4, llgf)
sk_negative_common(half, 2, llgh)
@ -113,4 +117,4 @@ sk_negative_common(byte, 1, llgc)
bpf_error:
# force a return 0 from jit handler
ltgr %r15,%r15 # Set condition code
br %r6
BR_EX %r6

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