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Peter Zijlstra 716c06c719 x86/speculation: Add eIBRS + Retpoline options 
commit 1e19da8522 upstream.

Thanks to the chaps at VUsec it is now clear that eIBRS is not
sufficient, therefore allow enabling of retpolines along with eIBRS.

Add spectre_v2=eibrs, spectre_v2=eibrs,lfence and
spectre_v2=eibrs,retpoline options to explicitly pick your preferred
means of mitigation.

Since there's new mitigations there's also user visible changes in
/sys/devices/system/cpu/vulnerabilities/spectre_v2 to reflect these
new mitigations.

  [ bp: Massage commit message, trim error messages,
    do more precise eIBRS mode checking. ]

Co-developed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Patrick Colp <patrick.colp@oracle.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
[fllinden@amazon.com: backported to 4.14 (no Hygon)]
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-03-11 10:13:28 +01:00
arch x86/speculation: Add eIBRS + Retpoline options 2022-03-11 10:13:28 +01:00
block block: bio-integrity: Advance seed correctly for larger interval sizes 2022-02-08 18:16:28 +01:00
certs certs: Trigger creation of RSA module signing key if it's not an RSA key 2021-09-22 11:45:19 +02:00
crypto crypto: pcrypt - Delay write to padata->info 2021-11-26 11:40:32 +01:00
Documentation bpf: Add kconfig knob for disabling unpriv bpf by default 2022-02-16 12:44:50 +01:00
drivers hamradio: fix macro redefine warning 2022-03-08 19:01:59 +01:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:20:30 +01:00
fs cifs: fix double free race when mount fails in cifs_get_root() 2022-03-08 19:01:55 +01:00
include HID: add mapping for KEY_ALL_APPLICATIONS 2022-03-08 19:01:58 +01:00
init bpf: Add kconfig knob for disabling unpriv bpf by default 2022-02-16 12:44:50 +01:00
ipc ipc: WARN if trying to remove ipc object which is absent 2021-12-08 08:46:53 +01:00
kernel cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug 2022-03-02 11:33:52 +01:00
lib lib/iov_iter: initialize "flags" in new pipe_buffer 2022-02-23 11:57:35 +01:00
mm memfd: fix F_SEAL_WRITE after shmem huge page allocated 2022-03-08 19:01:58 +01:00
net net: dcb: disable softirqs in dcbnl_flush_dev() 2022-03-08 19:01:58 +01:00
samples samples/kretprobes: Fix return value if register_kretprobe() failed 2021-11-26 11:40:31 +01:00
scripts Makefile.extrawarn: Move -Wunaligned-access to W=1 2022-02-23 11:57:32 +01:00
security ima: Allow template selection with ima_template[_fmt]= after ima_hash= 2022-02-16 12:44:49 +01:00
sound ASoC: ops: Shift tested values in snd_soc_put_volsw() by +min 2022-03-08 19:01:56 +01:00
tools x86/speculation: Rename RETPOLINE_AMD to RETPOLINE_LFENCE 2022-03-11 10:13:28 +01:00
usr initramfs: restore default compression behavior 2020-04-13 10:34:19 +02:00
virt KVM: Use kvm_pfn_t for local PFN variable in hva_to_pfn_remapped() 2021-08-08 08:53:29 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: rpm-pkg: keep spec file until make mrproper 2018-02-13 10:19:46 +01:00
.mailmap .mailmap: Add Maciej W. Rozycki's Imagination e-mail address 2017-11-10 12:16:15 -08:00
COPYING
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS MAINTAINERS: Update drm/i915 bug filing URL 2020-02-28 16:36:12 +01:00
Makefile Linux 4.14.270 2022-03-08 19:01:59 +01:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.