Important: Unbreakable Enterprise kernel security update (Oracle Linux 7)

[4.1.12-61.63.1]
- Revert 'kernel.spec: Require the new microcode_ctl.' (Brian Maly)
- x86: Clean up IBRS functionality resident in common code (Kanth Ghatraju) [Orabug: 27439198]
- x86: Display correct settings for the SPECTRE_V2 bug (Kanth Ghatraju) [Orabug: 27439198]
- Set CONFIG_GENERIC_CPU_VULNERABILITIES flag (Kanth Ghatraju) [Orabug: 27439198]
- x86/cpu: Implement CPU vulnerabilites sysfs functions (Thomas Gleixner) [Orabug: 27439198]
- sysfs/cpu: Fix typos in vulnerability documentation (David Woodhouse) [Orabug: 27439198]
- sysfs/cpu: Add vulnerability folder (Thomas Gleixner) [Orabug: 27439198]
- x86/cpufeatures: Add X86_BUG_SPECTRE_V[12] (David Woodhouse) [Orabug: 27439198]
- x86/cpufeatures: Add X86_BUG_CPU_MELTDOWN (Kanth Ghatraju) [Orabug: 27439198]
- KVM: x86: Add memory barrier on vmcs field lookup (Andrew Honig) {CVE-2017-5753}
- KVM: VMX: remove I/O port 0x80 bypass on Intel hosts (Andrew Honig) [Orabug: 27439182] {CVE-2017-1000407} {CVE-2017-1000407}

[4.1.12-61.62.1]
- xen-blkback: add pending_req allocation stats (Ankur Arora) [Orabug: 27386891]
- xen-blkback: move indirect req allocation out-of-line (Ankur Arora) [Orabug: 27386891]
- xen-blkback: pull nseg validation out in a function (Ankur Arora) [Orabug: 27386891]
- xen-blkback: make struct pending_req less monolithic (Ankur Arora) [Orabug: 27386891]

[4.1.12-61.61.1]
- x86/pti/efi: broken conversion from efi to kernel page table (Pavel Tatashin) [Orabug: 27378519] [Orabug: 27352353] {CVE-2017-5754}
- x86/spec: Always set IBRS to guest value on VMENTER and host on VMEXIT (redux) (Konrad Rzeszutek Wilk) [Orabug: 27378474]
- x86/IBRS: Make sure we restore MSR_IA32_SPEC_CTRL to a valid value (Boris Ostrovsky) [Orabug: 27378115]
- x86/IBRS/IBPB: Set sysctl_ibrs/ibpb_enabled properly (Boris Ostrovsky) [Orabug: 27382622]
- x86/spec_ctrl: Add missing 'lfence' when IBRS is not supported. (Konrad Rzeszutek Wilk) [Orabug: 27345850] {CVE-2017-5715}
- x86/entry_64: TRACE_IRQS_OFF before re-enabling. (Jamie Iles) [Orabug: 27345850] {CVE-2017-5715}
- ptrace: remove unlocked RCU dereference. (Jamie Iles) [Orabug: 27345850] {CVE-2017-5715}
- x86/ia32: Adds code hygiene for 32bit SYSCALL instruction entry. (Konrad Rzeszutek Wilk) [Orabug: 27345850] {CVE-2017-5715}
- x86/ia32: dont save registers on audit call (Konrad Rzeszutek Wilk) [Orabug: 27345850] {CVE-2017-5715}
- x86/spec/ia32: Sprinkle IBRS and RSB at the 32-bit SYSCALL (Konrad Rzeszutek Wilk) [Orabug: 27345850] {CVE-2017-5715}
- x86/ia32: Move STUFF_RSB And ENABLE_IBRS (Konrad Rzeszutek Wilk) [Orabug: 27345850] {CVE-2017-5715}
- x86/spec: Always set IBRS to guest value on VMENTER and host on VMEXIT. (Konrad Rzeszutek Wilk) [Orabug: 27365614] {CVE-2017-5715}
- x86/ia32: save and clear registers on syscall. (Jamie Iles) [Orabug: 27371760] {CVE-2017-5754}
- x86/IBRS: Save current status of MSR_IA32_SPEC_CTRL (Boris Ostrovsky) [Orabug: 27371757]
- pti: Rename X86_FEATURE_KAISER to X86_FEATURE_PTI (Pavel Tatashin) [Orabug: 27371653] {CVE-2017-5754}
- x86/spec_ctrl: Add missing IBRS_DISABLE (Konrad Rzeszutek Wilk)
- Make use of ibrs_inuse consistent. (Jun Nakajima)
- x86/kvm: Set IBRS on VMEXIT if guest disabled it. (Konrad Rzeszutek Wilk)
- Re-introduce clearing of r12-15, rbp, rbx (Kris Van Hees) [Orabug: 27345850] {CVE-2017-5715}
- x86: more ibrs/pti fixes (Pavel Tatashin) [Orabug: 27371653] {CVE-2017-5754}
- x86/spec: Actually do the check for in_use on ENABLE_IBRS (Konrad Rzeszutek Wilk) {CVE-2017-5715}
- kvm: svm: Expose the CPUID.0x80000008 ebx flag. (Konrad Rzeszutek Wilk) {CVE-2017-5715}
- x86/spec_ctrl: Provide the sysfs version of the ibrs_enabled (Konrad Rzeszutek Wilk) {CVE-2017-5715}
- x86: Use better #define for FEATURE_ENABLE_IBRS and 0 (Konrad Rzeszutek Wilk) {CVE-2017-5715}
- x86: Instead of 0x2, 0x4, and 0x1 use #defines. (Konrad Rzeszutek Wilk) {CVE-2017-5715}
- kpti: Disable when running under Xen PV (Konrad Rzeszutek Wilk) [Orabug: 27371653] {CVE-2017-5754}
- x86: Dont ENABLE_IBRS in nmi when we are still running on user cr3 (Konrad Rzeszutek Wilk) {CVE-2017-5715}
- x86/enter: Use IBRS on syscall and interrupts - fix ia32 path (Konrad Rzeszutek Wilk) {CVE-2017-5715}
- x86: Fix spectre/kpti integration (Konrad Rzeszutek Wilk) [Orabug: 27371653] {CVE-2017-5754}
- PTI: unbreak EFI old_memmap (Jiri Kosina) [Orabug: 27371653] {CVE-2017-5754}
- KAISER KABI tweaks. (Martin K. Petersen) [Orabug: 27371653] {CVE-2017-5754}
- x86/ldt: fix crash in ldt freeing. (Jamie Iles) [Orabug: 27371653] {CVE-2017-5754}
- x86/entry: Define 'cpu_current_top_of_stack' for 64-bit code (Denys Vlasenko) [Orabug: 27371653] {CVE-2017-5754}
- x86/entry: Remove unused 'kernel_stack' per-cpu variable (Denys Vlasenko) [Orabug: 27371653] {CVE-2017-5754}
- x86/entry: Stop using PER_CPU_VAR(kernel_stack) (Denys Vlasenko) [Orabug: 27371653] {CVE-2017-5754}
- kaiser: Set _PAGE_NX only if supported (Guenter Roeck) [Orabug: 27371653] {CVE-2017-5754}
- x86/vdso: Get pvclock data from the vvar VMA instead of the fixmap (Andy Lutomirski) [Orabug: 27371653] {CVE-2017-5754}
- KPTI: Report when enabled (Kees Cook) [Orabug: 27371653] {CVE-2017-5754}
- KPTI: Rename to PAGE_TABLE_ISOLATION (Kees Cook) [Orabug: 27371653] {CVE-2017-5754}
- x86/kaiser: Move feature detection up (Borislav Petkov) [Orabug: 27371653] {CVE-2017-5754}
- x86/kaiser: Reenable PARAVIRT (Borislav Petkov) [Orabug: 27371653] {CVE-2017-5754}
- x86/paravirt: Dont patch flush_tlb_single (Thomas Gleixner) [Orabug: 27371653] {CVE-2017-5754}
- kaiser: kaiser_flush_tlb_on_return_to_user() check PCID (Hugh Dickins) [Orabug: 27371653] {CVE-2017-5754}
- kaiser: asm/tlbflush.h handle noPGE at lower level (Hugh Dickins) [Orabug: 27371653] {CVE-2017-5754}
- kaiser: drop is_atomic arg to kaiser_pagetable_walk() (Hugh Dickins) [Orabug: 27371653] {CVE-2017-5754}
- kaiser: use ALTERNATIVE instead of x86_cr3_pcid_noflush (Hugh Dickins) [Orabug: 27371653] {CVE-2017-5754}
- x86/kaiser: Check boottime cmdline params (Borislav Petkov) [Ora