ACK/cmt: [SRU][Zesty][PATCH 0/3] Fixes for LP:1721070

[Colin Ian King]

On 06/10/17 18:36, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1721070
> 
> == SRU Justification ==
> POWER9 DD2.1 and earlier has an issue where some cache inhibited
> vector load will return bad data. The fix is two part, one
> firmware/microcode part triggers HMI interrupts when hitting such
> loads, the other part is commit 5080332c2c89 from linux-next which then
> emulates the instructions in Linux.
> 
> The affected instructions are limited to lxvd2x, lxvw4x, lxvb16x and
> lxvh8x.
> 
> Commits a3d96f70c147 and ccd3cd361341 are needed as prereqs.
> Commit 5080332c2c89 is still in linux-next. 
> 
> An SRU request as also sent for Artful, but it did not need a3d96f70c147.
> 
> == Fixes ==
> a3d96f70c147 ("powerpc/64s: Fix system reset vs general interrupt reentrancy")
> ccd3cd361341 ("powerpc/mce: Move 64-bit machine check code into mce.c")
> 5080332c2c89 ("powerpc/64s: Add workaround for P9 vector CI load issue")
> 
> == Regression Potential ==
> These commits are specific to powerpc.  They required some back porting but
>  have been tested by IBM.
> 
> == Test Case ==
> A test kernel was built with these patches and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.
> 
> 
> 
> Michael Ellerman (1):
>   powerpc/mce: Move 64-bit machine check code into mce.c
> 
> Michael Neuling (1):
>   powerpc/64s: Add workaround for P9 vector CI load issue
> 
> Nicholas Piggin (1):
>   powerpc/64s: Fix system reset vs general interrupt reentrancy
> 
>  arch/powerpc/include/asm/emulated_ops.h  |   4 +
>  arch/powerpc/include/asm/exception-64s.h |  14 +-
>  arch/powerpc/include/asm/paca.h          |   9 +-
>  arch/powerpc/include/asm/reg.h           |   1 +
>  arch/powerpc/include/asm/uaccess.h       |  17 +++
>  arch/powerpc/kernel/asm-offsets.c        |   1 +
>  arch/powerpc/kernel/exceptions-64s.S     |  25 +++-
>  arch/powerpc/kernel/mce.c                |  61 ++++++++
>  arch/powerpc/kernel/traps.c              | 236 ++++++++++++++++++++++++++-----
>  arch/powerpc/platforms/powernv/smp.c     |   7 +
>  10 files changed, 324 insertions(+), 51 deletions(-)
> 
These patches are a little hairy to say the least; the third one being
from linux-next too.  The back ports look good though and it it seems to
fix the problem with positive test results.  Since this touches one
specific architecture and we have positive test results and the
backports look OK, I'll ACK these.

Acked-by: Colin Ian King <colin.king at canonical.com>

Acked-by: Colin