[SRU][Xenial][PULL] x86/kvm: Backport fixup and missing commits (LP: #1811646)

[Juerg Haefliger]

== SRU Justification ==

The update to stable 4.4.168 contains a couple of x86/kvm related commits that have later fixup commits in upstream. Also, there are a couple of commits in stable 4.4. that we're missing.

== Fix ==

Cherry-pick or backport the relevant commits.

== Regression Potential ==

Low. The relevant commits have been in upstream for quite a while.

== Test Case ==

Not available. It's unclear what the impact is of not having those fixups but it's clear from upstream's commit messages that they fix real issues.

Compile-tested all architectres. Ran release regression tests (locally).

Signed-off-by: Juerg Haefliger <juergh at canonical.com>
---

The following changes since commit 6aea40b78942cf00d2c8a9e2e204e7950f988a10:

  Linux 4.4.170 (2019-01-14 09:43:46 +0100)

are available in the Git repository at:

  git://git.launchpad.net/~juergh/+git/xenial-linux lp1811646

for you to fetch changes up to 04474027f01c02570ab512b0a127ad1e377e220d:

  UBUNTU: SAUCE: KVM: Move code fragments, cleanup and re-indent (2019-01-14 13:07:48 +0100)

----------------------------------------------------------------
Jim Mattson (4):
      kvm: nVMX: VMCLEAR an active shadow VMCS after last use
      kvm: x86: IA32_ARCH_CAPABILITIES is always supported
      kvm: svm: Ensure an IBPB on all affected CPUs when freeing a vmcb
      kvm: vmx: Scrub hardware GPRs at VM-exit

Juerg Haefliger (2):
      UBUNTU: SAUCE: [Fix] x86/KVM/VMX: Add L1D flush logic
      UBUNTU: SAUCE: KVM: Move code fragments, cleanup and re-indent

KarimAllah Ahmed (1):
      X86/nVMX: Properly set spec_ctrl and pred_cmd before merging MSRs

Paolo Bonzini (3):
      KVM: x86: avoid vmalloc(0) in the KVM_SET_CPUID
      KVM/VMX: Optimize vmx_vcpu_run() and svm_vcpu_run() by marking the RDMSR path as unlikely()
      KVM: VMX: fixes for vmentry_l1d_flush module parameter

Thomas Gleixner (1):
      KVM: x86: SVM: Call x86_spec_ctrl_set_guest/host() with interrupts disabled

Tom Lendacky (1):
      KVM: SVM: Add MSR-based feature support for serializing LFENCE

Wanpeng Li (1):
      KVM: X86: Allow userspace to define the microcode version

 arch/x86/include/asm/kvm_host.h |  1 +
 arch/x86/kvm/cpuid.c            | 27 +++++++-----
 arch/x86/kvm/cpuid.h            | 44 ++++++++++----------
 arch/x86/kvm/svm.c              | 91 ++++++++++++++++++++++++++++++++++-------
 arch/x86/kvm/vmx.c              | 78 +++++++++++++++++++++++------------
 arch/x86/kvm/x86.c              | 12 +++++-
 6 files changed, 179 insertions(+), 74 deletions(-)