[PATCH 4.9 00/24] 4.9.306-rc1 review

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This is the start of the stable review cycle for the 4.9.306 release.
There are 24 patches in this series, all will be posted as a response
to this one.  If anyone has any issues with these being applied, please
let me know.

Responses should be made by Fri, 11 Mar 2022 15:58:48 +0000.
Anything received after that time might be too late.

The whole patch series can be found in one patch at:
	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.9.306-rc1.gz
or in the git tree and branch at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.9.y
and the diffstat can be found below.

thanks,

greg k-h

-------------
Pseudo-Shortlog of commits:

Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Linux 4.9.306-rc1

Emmanuel Gil Peyrot <linkmauve@xxxxxxxxxxxx>
    ARM: fix build error when BPF_SYSCALL is disabled

Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
    ARM: include unprivileged BPF status in Spectre V2 reporting

Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
    ARM: Spectre-BHB workaround

Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
    ARM: use LOADADDR() to get load address of sections

Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
    ARM: early traps initialisation

Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
    ARM: report Spectre v2 status through sysfs

Mark Rutland <mark.rutland@xxxxxxx>
    arm/arm64: smccc/psci: add arm_smccc_1_1_get_conduit()

Steven Price <steven.price@xxxxxxx>
    arm/arm64: Provide a wrapper for SMCCC 1.1 calls

Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
    x86/speculation: Warn about eIBRS + LFENCE + Unprivileged eBPF + SMT

Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
    x86/speculation: Warn about Spectre v2 LFENCE mitigation

Kim Phillips <kim.phillips@xxxxxxx>
    x86/speculation: Update link to AMD speculation whitepaper

Kim Phillips <kim.phillips@xxxxxxx>
    x86/speculation: Use generic retpoline by default on AMD

Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
    x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting

Peter Zijlstra <peterz@xxxxxxxxxxxxx>
    Documentation/hw-vuln: Update spectre doc

Peter Zijlstra <peterz@xxxxxxxxxxxxx>
    x86/speculation: Add eIBRS + Retpoline options

Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
    x86/speculation: Rename RETPOLINE_AMD to RETPOLINE_LFENCE

Peter Zijlstra <peterz@xxxxxxxxxxxxx>
    x86,bugs: Unconditionally allow spectre_v2=retpoline,amd

Borislav Petkov <bp@xxxxxxx>
    x86/speculation: Merge one test in spectre_v2_user_select_mitigation()

Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
    Documentation: refer to config RANDOMIZE_BASE for kernel address-space randomization

Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
    Documentation: Add swapgs description to the Spectre v1 documentation

Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
    Documentation: Add section about CPU vulnerabilities for Spectre

Zhenzhong Duan <zhenzhong.duan@xxxxxxxxxx>
    x86/retpoline: Remove minimal retpoline support

Zhenzhong Duan <zhenzhong.duan@xxxxxxxxxx>
    x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support

Zhenzhong Duan <zhenzhong.duan@xxxxxxxxxx>
    x86/speculation: Add RETPOLINE_AMD support to the inline asm CALL_NOSPEC variant


-------------

Diffstat:

 Documentation/hw-vuln/index.rst          |   1 +
 Documentation/hw-vuln/spectre.rst        | 785 +++++++++++++++++++++++++++++++
 Documentation/kernel-parameters.txt      |   8 +-
 Makefile                                 |   4 +-
 arch/arm/include/asm/assembler.h         |  10 +
 arch/arm/include/asm/spectre.h           |  32 ++
 arch/arm/kernel/Makefile                 |   2 +
 arch/arm/kernel/entry-armv.S             |  79 +++-
 arch/arm/kernel/entry-common.S           |  24 +
 arch/arm/kernel/spectre.c                |  71 +++
 arch/arm/kernel/traps.c                  |  65 ++-
 arch/arm/kernel/vmlinux-xip.lds.S        |  37 +-
 arch/arm/kernel/vmlinux.lds.S            |  37 +-
 arch/arm/mm/Kconfig                      |  11 +
 arch/arm/mm/proc-v7-bugs.c               | 198 ++++++--
 arch/x86/Kconfig                         |   4 -
 arch/x86/Makefile                        |   5 +-
 arch/x86/include/asm/cpufeatures.h       |   2 +-
 arch/x86/include/asm/nospec-branch.h     |  41 +-
 arch/x86/kernel/cpu/bugs.c               | 223 ++++++---
 drivers/firmware/psci.c                  |  15 +
 include/linux/arm-smccc.h                |  74 +++
 include/linux/bpf.h                      |  11 +
 kernel/sysctl.c                          |   8 +
 tools/arch/x86/include/asm/cpufeatures.h |   2 +-
 25 files changed, 1596 insertions(+), 153 deletions(-)





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