linux-kernel - [GIT PULL] Please pull powerpc/linux.git powerpc-4.17-7 tag

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Message-ID: <878t88q7u8.fsf@concordia.ellerman.id.au>
Date:   Fri, 25 May 2018 21:43:11 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        mikey@...ling.org
Subject: [GIT PULL] Please pull powerpc/linux.git powerpc-4.17-7 tag

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Hash: SHA256

Hi Linus,

Please pull one more powerpc fix for 4.17:

The following changes since commit c1d2a31397ec51f0370f6bd17b19b39152c263cb:

  powerpc/powernv: Fix NVRAM sleep in invalid context when crashing (2018-05-18 00:23:07 +1000)

are available in the git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git tags/powerpc-4.17-7

for you to fetch changes up to faf37c44a105f3608115785f17cbbf3500f8bc71:

  powerpc/64s: Clear PCR on boot (2018-05-18 16:05:15 +1000)

- ----------------------------------------------------------------
powerpc fixes for 4.17 #7

Just one fix, to make sure the PCR (Processor Compatibility Register) is reset
on boot. Otherwise if we're running in compat mode in a guest (eg. pretending a
Power9 is a Power8) and the host kernel oopses and kdumps then the kdump
kernel's userspace will be running in Power8 mode, and will SIGILL if it uses
Power9-only instructions.

Thanks to:
  Michael Neuling.

- ----------------------------------------------------------------
Michael Neuling (1):
      powerpc/64s: Clear PCR on boot

 arch/powerpc/kernel/cpu_setup_power.S | 6 ++++++
 arch/powerpc/kernel/dt_cpu_ftrs.c     | 1 +
 2 files changed, 7 insertions(+)
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