This is the start of the stable review cycle for the 5.15.48 release.
There are 11 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 Thu, 16 Jun 2022 18:37:02 +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/v5.x/stable-review/patch-5.15.48-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-5.15.y
and the diffstat can be found below.

thanks,

greg k-h

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

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Linux 5.15.48-rc1

Josh Poimboeuf <jpoimboe@kernel.org>
    x86/speculation/mmio: Print SMT warning

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    KVM: x86/speculation: Disable Fill buffer clear within guests

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/speculation/mmio: Reuse SRBDS mitigation for SBDS

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/speculation/srbds: Update SRBDS mitigation selection

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/speculation/mmio: Enable CPU Fill buffer clearing on idle

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/bugs: Group MDS, TAA & Processor MMIO Stale Data mitigations

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/speculation/mmio: Add mitigation for Processor MMIO Stale Data

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/speculation: Add a common function for MD_CLEAR mitigation update

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/speculation/mmio: Enumerate Processor MMIO Stale Data bug

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    Documentation: Add documentation for Processor MMIO Stale Data


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

Diffstat:

 Documentation/ABI/testing/sysfs-devices-system-cpu |   1 +
 Documentation/admin-guide/hw-vuln/index.rst        |   1 +
 .../hw-vuln/processor_mmio_stale_data.rst          | 246 +++++++++++++++++++++
 Documentation/admin-guide/kernel-parameters.txt    |  36 +++
 Makefile                                           |   4 +-
 arch/x86/include/asm/cpufeatures.h                 |   1 +
 arch/x86/include/asm/msr-index.h                   |  25 +++
 arch/x86/include/asm/nospec-branch.h               |   2 +
 arch/x86/kernel/cpu/bugs.c                         | 235 +++++++++++++++++---
 arch/x86/kernel/cpu/common.c                       |  52 ++++-
 arch/x86/kvm/vmx/vmx.c                             |  72 ++++++
 arch/x86/kvm/vmx/vmx.h                             |   2 +
 arch/x86/kvm/x86.c                                 |   3 +
 drivers/base/cpu.c                                 |   8 +
 include/linux/cpu.h                                |   3 +
 tools/arch/x86/include/asm/cpufeatures.h           |   1 +
 tools/arch/x86/include/asm/msr-index.h             |  25 +++
 17 files changed, 676 insertions(+), 41 deletions(-)

On 14/06/2022 19:40, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +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/v5.x/stable-review/patch-5.15.48-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-5.15.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

No new regressions for Tegra ...

Test results for stable-v5.15:
     10 builds:	10 pass, 0 fail
     28 boots:	28 pass, 0 fail
     114 tests:	113 pass, 1 fail

Linux version:	5.15.48-rc1-g2e65f63d5e2c
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                 tegra194-p2972-0000, tegra194-p3509-0000+p3668-0000,
                 tegra20-ventana, tegra210-p2371-2180,
                 tegra210-p3450-0000, tegra30-cardhu-a04

Test failures:	tegra194-p2972-0000: boot.py

Tested-by: Jon Hunter <jonathanh@nvidia.com>

Jon
-- 
nvpublic

On 2022-06-14 20:40:29, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +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/v5.x/stable-review/patch-5.15.48-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-5.15.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

Hi Greg - I successfully tested this release candidate in x86_64 Hyper-V
Azure VMs with speculation controls both enabled and disabled.
Speculation controls are passed through to the guest and, of particular
interest for this release candidate, set the FB_CLEAR bit in the
IA32_ARCH_CAPABILITIES MSR.

The FB_CLEAR bit's presence is accurately conveyed in the kernel log
messages during boot and in the
/sys/devices/system/cpu/vulnerabilities/mmio_stale_data file.

I did a full LTP run in both scenarios (the results were the same) and
also compared the results to a previous run against the v5.15.45 release
(there were no regressions).

Tested-by: Tyler Hicks <tyhicks@linux.microsoft.com>

Tyler

On Tue, Jun 14, 2022 at 08:40:29PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +0000.
> Anything received after that time might be too late.
> 

Build results:
	total: 159 pass: 159 fail: 0
Qemu test results:
	total: 488 pass: 488 fail: 0

Tested-by: Guenter Roeck <linux@roeck-us.net>

Guenter

On Wed, 15 Jun 2022 at 00:15, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +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/v5.x/stable-review/patch-5.15.48-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-5.15.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro’s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>

## Build
* kernel: 5.15.48-rc1
* git: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc
* git branch: linux-5.15.y
* git commit: 2e65f63d5e2c817d883c4c8df2010aa23bd07ea4
* git describe: v5.15.47-12-g2e65f63d5e2c
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-5.15.y/build/v5.15.47-12-g2e65f63d5e2c

## Test Regressions (compared to v5.15.40-103-g293cfb310f44)
No test regressions found.

## Metric Regressions (compared to v5.15.40-103-g293cfb310f44)
No metric regressions found.

## Test Fixes (compared to v5.15.40-103-g293cfb310f44)
No test fixes found.

## Metric Fixes (compared to v5.15.40-103-g293cfb310f44)
No metric fixes found.

## Test result summary
total: 127914, pass: 114505, fail: 268, skip: 12412, xfail: 729

## Build Summary
* arc: 10 total, 10 passed, 0 failed
* arm: 319 total, 316 passed, 3 failed
* arm64: 64 total, 64 passed, 0 failed
* i386: 57 total, 50 passed, 7 failed
* mips: 41 total, 38 passed, 3 failed
* parisc: 14 total, 14 passed, 0 failed
* powerpc: 59 total, 56 passed, 3 failed
* riscv: 27 total, 27 passed, 0 failed
* s390: 26 total, 23 passed, 3 failed
* sh: 26 total, 24 passed, 2 failed
* sparc: 14 total, 14 passed, 0 failed
* x86_64: 62 total, 61 passed, 1 failed

## Test suites summary
* fwts
* igt-gpu-tools
* kunit
* kvm-unit-tests
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-test
* ltp-cap_bounds
* ltp-cap_bounds-tests
* ltp-commands
* ltp-commands-tests
* ltp-containers
* ltp-containers-tests
* ltp-controllers
* ltp-controllers-tests
* ltp-cpuhotplug-tests
* ltp-crypto
* ltp-crypto-tests
* ltp-cve-tests
* ltp-dio-tests
* ltp-fcntl-locktests
* ltp-fcntl-locktests-tests
* ltp-filecaps
* ltp-filecaps-tests
* ltp-fs
* ltp-fs-tests
* ltp-fs_bind
* ltp-fs_bind-tests
* ltp-fs_perms_simple
* ltp-fs_perms_simple-tests
* ltp-fsx
* ltp-fsx-tests
* ltp-hugetlb
* ltp-hugetlb-tests
* ltp-io
* ltp-io-tests
* ltp-ipc
* ltp-ipc-tests
* ltp-math-tests
* ltp-mm-tests
* ltp-nptl
* ltp-nptl-tests
* ltp-open-posix-tests
* ltp-pty
* ltp-pty-tests
* ltp-sched-tests
* ltp-securebits
* ltp-securebits-tests
* ltp-smoke
* ltp-syscalls-tests
* ltp-tracing-tests
* network-basic-tests
* packetdrill
* perf
* perf/Zstd-perf.data-compression
* rcutorture
* ssuite
* v4l2-compliance
* vdso

--
Linaro LKFT
https://lkft.linaro.org

On 6/14/22 11:40 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +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/v5.x/stable-review/patch-5.15.48-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-5.15.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <re@w6rz.net>

Hi Greg,

On Tue, Jun 14, 2022 at 08:40:29PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +0000.
> Anything received after that time might be too late.

Build test (gcc version 11.3.1 20220612):
mips: 62 configs -> no failure
arm: 99 configs -> no failure
arm64: 3 configs -> no failure
x86_64: 4 configs -> no failure
alpha allmodconfig -> no failure
csky allmodconfig -> no failure
powerpc allmodconfig -> no failure
riscv allmodconfig -> no failure
s390 allmodconfig -> no failure
xtensa allmodconfig -> no failure

Boot test:
x86_64: Booted on my test laptop. No regression.
x86_64: Booted on qemu. No regression. [1]
arm64: Booted on rpi4b (4GB model). No regression. [2]
mips: Booted on ci20 board. No regression. [3]

[1]. https://openqa.qa.codethink.co.uk/tests/1334
[2]. https://openqa.qa.codethink.co.uk/tests/1342
[3]. https://openqa.qa.codethink.co.uk/tests/1341

Tested-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>

--
Regards
Sudip

> > This is the start of the stable review cycle for the 5.15.48 release.
> > There are 11 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 Thu, 16 Jun 2022 18:37:02 +0000.
> > Anything received after that time might be too late.
>

Compiled and booted on x86 & arm64 test systems. No dmesg regressions.

Tested-by: Allen Pais <apais@linux.microsoft.com>

Thanks.

On Tue, Jun 14, 2022 at 08:40:29PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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.

Successfully cross-compiled for arm (multi_v7_defconfig, GCC 12.1.0,
ARMv7 with neon FPU) and arm64 (bcm2711_defconfig, GCC 12.1.0).

Tested-by: Bagas Sanjaya <bagasdotme@gmail.com>

-- 
An old man doll... just what I always wanted! - Clara

On 6/14/22 12:40 PM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +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/v5.x/stable-review/patch-5.15.48-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-5.15.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

Compiled and booted on my test system. No dmesg regressions.

Tested-by: Shuah Khan <skhan@linuxfoundation.org>

thanks,
-- Shuah

On Tue, 14 Jun 2022 20:40:29 +0200, Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +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/v5.x/stable-review/patch-5.15.48-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-5.15.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

5.15.48-rc1 Successfully Compiled and booted on my Raspberry PI 4b (8g) (bcm2711)
                
Tested-by: Fox Chen <foxhlchen@gmail.com>

On 6/14/22 11:40, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.48 release.
> There are 11 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 Thu, 16 Jun 2022 18:37:02 +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/v5.x/stable-review/patch-5.15.48-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-5.15.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

On ARCH_BRCMSTB using 32-bit and 64-bit ARM kernels:

Tested-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian