Comment 3 for bug 1828495

List of commits needed to enable ARCH_CAPABILITIES:

Kernel:
commit 2bdb76c015df7125783d8394d6339d181cb5bc30
Author: Xiaoyao Li <email address hidden>
Date: Fri Mar 8 15:57:20 2019 +0800
    kvm/x86: Move MSR_IA32_ARCH_CAPABILITIES to array emulated_msrs

QEMU:

commit 014018e19b3c54dd1bf5072bc912ceffea40abe8
Author: Eduardo Habkost <email address hidden>
Date: Fri Jan 25 20:06:06 2019 -0200
   i386: Make arch_capabilities migratable

commit 485b1d256bcb0874bcde0223727c159b6837e6f8
Author: Eduardo Habkost <email address hidden>
Date: Fri Jan 25 20:06:05 2019 -0200
   i386: kvm: Disable arch_capabilities if MSR can't be set

commit b0a1980384fc265d91de7e09aa5fe531a69e6288
Author: Tao Xu <email address hidden>
Date: Thu Dec 27 10:43:03 2018 +0800
   i386: Update stepping of Cascadelake-Server

commit aec5e9c3a94cf8b7920f59bef69a6f426092c4a0
Author: Bandan Das <email address hidden>
Date: Sun Nov 25 23:17:28 2018 -0500
   kvm: Use KVM_GET_MSR_INDEX_LIST for MSR_IA32_ARCH_CAPABILITIES support

commit 07585923485952bf4cb7da563c9f91fecc85d09c
Author: Robert Hoo <email address hidden>
Date: Mon Oct 15 12:47:24 2018 +0800
   x86: Data structure changes to support MSR based features

commit f57bceb6ab5163ddd6c41ff4344ab8cf28a9c63d
Author: Robert Hoo <email address hidden>
Date: Mon Oct 15 12:47:23 2018 +0800
   kvm: Add support to KVM_GET_MSR_FEATURE_INDEX_LIST and KVM_GET_MSRS system ioctl

commit d86f963694df27f11b3681ffd225c9362de1b634
Author: Robert Hoo <email address hidden>
Date: Mon Oct 15 12:47:25 2018 +0800
   x86: define a new MSR based feature word – FEATURE_WORDS_ARCH_CAPABILITIES

commit c7a88b52f62b30c04158eeb07f73e3f72221b6a8
Author: Tao Xu <email address hidden>
Date: Wed Sep 19 11:11:22 2018 +0800
   i386: Add new model of Cascadelake-Server

commit 3fc7c73139d2d38ae80c3b0bc963b1ac1555924c
Author: Robert Hoo <email address hidden>
Date: Thu Jul 5 17:09:55 2018 +0800
   i386: Add CPUID bit and feature words for IA32_ARCH_CAPABILITIES MSR

commit 8a11c62da9146dd89aee98947e6bd831e65a970d
Author: Robert Hoo <email address hidden>
Date: Thu Jul 5 17:09:58 2018 +0800
   i386: Add new CPU model Icelake-{Server,Client}

commit 8c80c99fcceabd0708a5a83f08577e778c9419f5
Author: Robert Hoo <email address hidden>
Date: Thu Jul 5 17:09:54 2018 +0800
   i386: Add new MSR indices for IA32_PRED_CMD and IA32_ARCH_CAPABILITIES