linux-kernel - [PATCH v2 0/3] INVPCID support for the AMD guests

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Date:   Tue, 16 Jun 2020 17:03:29 -0500
From:   Babu Moger <babu.moger@....com>
To:     wanpengli@...cent.com, joro@...tes.org, x86@...nel.org,
        sean.j.christopherson@...el.com, mingo@...hat.com, bp@...en8.de,
        hpa@...or.com, pbonzini@...hat.com, vkuznets@...hat.com,
        tglx@...utronix.de, jmattson@...gle.com
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: [PATCH v2 0/3] INVPCID support for the AMD guests

The following series adds the support for PCID/INVPCID on AMD guests.

For the guests with nested page table (NPT) support, the INVPCID
feature works as running it natively. KVM does not need to do any
special handling in this case.

INVPCID interceptions are added only when the guest is running with
shadow page table enabled. In this case the hypervisor needs to
handle the tlbflush based on the type of invpcid instruction type.

AMD documentation for INVPCID feature is available at "AMD64
Architecture Programmer’s Manual Volume 2: System Programming,
Pub. 24593 Rev. 3.34(or later)"

The documentation can be obtained at the links below:
Link: https://www.amd.com/system/files/TechDocs/24593.pdf
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537
---
v2:
  - Taken care of few comments from Jim Mattson.
  - KVM interceptions added only when tdp is off. No interceptions
    when tdp is on.
  - Reverted the fault priority to original order.sed the 
  
v1:
  https://lore.kernel.org/lkml/159191202523.31436.11959784252237488867.stgit@bmoger-ubuntu/

Babu Moger (3):
      KVM: X86: Move handling of INVPCID types to x86
      KVM:SVM: Add extended intercept support
      KVM:SVM: Enable INVPCID feature on AMD


 arch/x86/include/asm/svm.h      |    7 +++
 arch/x86/include/uapi/asm/svm.h |    2 +
 arch/x86/kvm/svm/nested.c       |    6 ++-
 arch/x86/kvm/svm/svm.c          |   55 +++++++++++++++++++++++++++
 arch/x86/kvm/svm/svm.h          |   18 +++++++++
 arch/x86/kvm/trace.h            |   12 ++++--
 arch/x86/kvm/vmx/vmx.c          |   68 ----------------------------------
 arch/x86/kvm/x86.c              |   79 +++++++++++++++++++++++++++++++++++++++
 arch/x86/kvm/x86.h              |    3 +
 9 files changed, 176 insertions(+), 74 deletions(-)

--
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