[GIT PULL] arm64: Fixes for -rc4

[Will Deacon]

Hi Linus,

Please pull these arm64 fixes for -rc4. The main thing here is a
long-awaited workaround for a CPU erratum on ThunderX2 which we have
developed in conjunction with engineers from Cavium/Marvell. At the moment,
the workaround is unconditionally enabled for affected CPUs at runtime
but we may add a command-line option to disable it in future if performance
numbers show up indicating a significant cost for real workloads.

The other fixes are summarised in the tag.

Note that the workaround code ended up being based on -rc2, so I had a
bit of a faff trying to generate the right diffstat for this pull request
after merging that branch into our fixes branch based on -rc1. In the end
I had to emulate the pull locally because I couldn't figure out how to
drive request-pull correctly despite the shortlog being correct. I'd love
to know what I should've done instead.

Thanks,

Will

--->8

The following changes since commit 3e7c93bd04edfb0cae7dad1215544c9350254b8f:

  arm64: armv8_deprecated: Checking return value for memory allocation (2019-10-08 13:34:04 +0100)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git tags/arm64-fixes

for you to fetch changes up to 777d062e5bee0e3c0751cdcbce116a76ee2310ec:

  Merge branch 'errata/tx2-219' into for-next/fixes (2019-10-17 13:42:42 -0700)

----------------------------------------------------------------
arm64 fixes for -rc4

- Work around Cavium/Marvell ThunderX2 erratum #219

- Fix regression in mlock() ABI caused by sign-extension of TTBR1 addresses

- More fixes to the spurious kernel fault detection logic

- Fix pathological preemption race when enabling some CPU features at boot

- Drop broken kcore macros in favour of generic implementations

- Fix userspace view of ID_AA64ZFR0_EL1 when SVE is disabled

- Avoid NULL dereference on allocation failure during hibernation

----------------------------------------------------------------
Chris von Recklinghausen (1):
      arm64: Fix kcore macros after 52-bit virtual addressing fallout

Julien Grall (1):
      arm64: cpufeature: Treat ID_AA64ZFR0_EL1 as RAZ when SVE is not enabled

Julien Thierry (1):
      arm64: entry.S: Do not preempt from IRQ before all cpufeatures are enabled

Marc Zyngier (4):
      arm64: KVM: Trap VM ops when ARM64_WORKAROUND_CAVIUM_TX2_219_TVM is set
      arm64: Enable workaround for Cavium TX2 erratum 219 when running SMT
      arm64: Avoid Cavium TX2 erratum 219 when switching TTBR
      arm64: Allow CAVIUM_TX2_ERRATUM_219 to be selected

Mark Rutland (1):
      arm64: mm: fix inverted PAR_EL1.F check

Pavel Tatashin (1):
      arm64: hibernate: check pgd table allocation

Will Deacon (2):
      arm64: tags: Preserve tags for addresses translated via TTBR1
      Merge branch 'errata/tx2-219' into for-next/fixes

Yang Yingliang (1):
      arm64: sysreg: fix incorrect definition of SYS_PAR_EL1_F

 Documentation/arm64/silicon-errata.rst |  2 +
 arch/arm64/Kconfig                     | 17 +++++++++
 arch/arm64/include/asm/asm-uaccess.h   |  7 ++--
 arch/arm64/include/asm/cpucaps.h       |  4 +-
 arch/arm64/include/asm/memory.h        | 10 ++++-
 arch/arm64/include/asm/pgtable.h       |  3 --
 arch/arm64/include/asm/sysreg.h        |  2 +-
 arch/arm64/kernel/cpu_errata.c         | 38 +++++++++++++++++++
 arch/arm64/kernel/cpufeature.c         | 15 +++++---
 arch/arm64/kernel/entry.S              |  8 ++--
 arch/arm64/kernel/hibernate.c          |  9 ++++-
 arch/arm64/kernel/process.c            | 18 +++++++++
 arch/arm64/kvm/hyp/switch.c            | 69 +++++++++++++++++++++++++++++++++-
 arch/arm64/mm/fault.c                  |  6 ++-
 include/linux/sched.h                  |  1 +
 15 files changed, 186 insertions(+), 23 deletions(-)