linux/drivers/base
Linus Torvalds fa4bff1650 Merge branch 'x86-mds-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 MDS mitigations from Thomas Gleixner:
 "Microarchitectural Data Sampling (MDS) is a hardware vulnerability
  which allows unprivileged speculative access to data which is
  available in various CPU internal buffers. This new set of misfeatures
  has the following CVEs assigned:

     CVE-2018-12126  MSBDS  Microarchitectural Store Buffer Data Sampling
     CVE-2018-12130  MFBDS  Microarchitectural Fill Buffer Data Sampling
     CVE-2018-12127  MLPDS  Microarchitectural Load Port Data Sampling
     CVE-2019-11091  MDSUM  Microarchitectural Data Sampling Uncacheable Memory

  MDS attacks target microarchitectural buffers which speculatively
  forward data under certain conditions. Disclosure gadgets can expose
  this data via cache side channels.

  Contrary to other speculation based vulnerabilities the MDS
  vulnerability does not allow the attacker to control the memory target
  address. As a consequence the attacks are purely sampling based, but
  as demonstrated with the TLBleed attack samples can be postprocessed
  successfully.

  The mitigation is to flush the microarchitectural buffers on return to
  user space and before entering a VM. It's bolted on the VERW
  instruction and requires a microcode update. As some of the attacks
  exploit data structures shared between hyperthreads, full protection
  requires to disable hyperthreading. The kernel does not do that by
  default to avoid breaking unattended updates.

  The mitigation set comes with documentation for administrators and a
  deeper technical view"

* 'x86-mds-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  x86/speculation/mds: Fix documentation typo
  Documentation: Correct the possible MDS sysfs values
  x86/mds: Add MDSUM variant to the MDS documentation
  x86/speculation/mds: Add 'mitigations=' support for MDS
  x86/speculation/mds: Print SMT vulnerable on MSBDS with mitigations off
  x86/speculation/mds: Fix comment
  x86/speculation/mds: Add SMT warning message
  x86/speculation: Move arch_smt_update() call to after mitigation decisions
  x86/speculation/mds: Add mds=full,nosmt cmdline option
  Documentation: Add MDS vulnerability documentation
  Documentation: Move L1TF to separate directory
  x86/speculation/mds: Add mitigation mode VMWERV
  x86/speculation/mds: Add sysfs reporting for MDS
  x86/speculation/mds: Add mitigation control for MDS
  x86/speculation/mds: Conditionally clear CPU buffers on idle entry
  x86/kvm/vmx: Add MDS protection when L1D Flush is not active
  x86/speculation/mds: Clear CPU buffers on exit to user
  x86/speculation/mds: Add mds_clear_cpu_buffers()
  x86/kvm: Expose X86_FEATURE_MD_CLEAR to guests
  x86/speculation/mds: Add BUG_MSBDS_ONLY
  ...
2019-05-14 07:57:29 -07:00
..
firmware_loader firmware_loader: Fix a typo ("syfs" -> "sysfs") 2019-05-01 18:31:11 +02:00
power Driver core/kobject patches for 5.2-rc1 2019-05-07 13:01:40 -07:00
regmap Merge branch 'regmap-5.2' into regmap-next 2019-04-25 20:27:04 +01:00
test drivers: base: test: add proper SPDX identifier to Makefile 2019-04-04 20:03:40 +02:00
arch_topology.c arch_topology: Make cpu_capacity sysfs node as read-only 2019-04-04 18:41:21 +02:00
attribute_container.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
base.h driver core: Probe devices asynchronously instead of the driver 2019-01-31 14:20:53 +01:00
bus.c driver core: Probe devices asynchronously instead of the driver 2019-01-31 14:20:53 +01:00
cacheinfo.c cacheinfo: Keep the old value if of_property_read_u32 fails 2019-01-22 13:50:31 +01:00
class.c driver core: move device->knode_class to device_private 2019-01-18 16:55:48 +01:00
component.c drivers/component: kerneldoc polish 2019-02-19 13:20:35 +01:00
container.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
core.c driver core: Clarify which counterparts to use to device_add() 2019-04-25 19:34:54 +02:00
cpu.c Merge branch 'x86-mds-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-14 07:57:29 -07:00
dd.c driver core: Postpone DMA tear-down until after devres release for probe failure 2019-04-25 21:48:37 +02:00
devcon.c device connection: Find device connections also from device graphs 2019-02-14 10:52:25 +01:00
devcoredump.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
devres.c devres: Align data[] to ARCH_KMALLOC_MINALIGN 2018-11-11 11:40:04 -08:00
devtmpfs.c vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled 2018-12-20 16:32:56 +00:00
driver.c driver-core: return EINVAL error instead of BUG_ON() 2018-05-25 18:18:45 +02:00
firmware.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
hypervisor.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
init.c base: fix order of OF initialization 2018-07-07 17:54:29 +02:00
isa.c Merge 4.15-rc3 into driver-core-next 2017-12-11 08:50:05 +01:00
Kconfig Driver core/kobject patches for 5.2-rc1 2019-05-07 13:01:40 -07:00
Makefile drivers: base: Introducing software nodes to the firmware node framework 2018-11-26 18:19:11 +01:00
map.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
memory.c mm/memory_hotplug: Do not unlock when fails to take the device_hotplug_lock 2019-04-25 19:40:20 +02:00
module.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
node.c node: Add memory-side caching attributes 2019-04-04 18:41:21 +02:00
pinctrl.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
platform-msi.c platform-msi: Free descriptors in platform_msi_domain_free() 2018-12-13 09:35:31 +00:00
platform.c Revert "driver core: platform: Fix the usage of platform device name(pdev->name)" 2019-04-29 19:49:21 +02:00
property.c device property: Add fwnode_graph_get_endpoint_by_id() 2019-04-18 16:44:05 +02:00
soc.c base: soc: use put_device() instead of kfree() 2018-03-15 14:37:03 +01:00
swnode.c drivers: base: swnode: Make two functions static 2019-03-19 16:37:56 +01:00
syscore.c treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
topology.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
transport_class.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00