linux-kernel - [PATCH v3 0/4] KVM: SVM: Add initial GHCB protocol version 2 support

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Date:   Mon, 13 Sep 2021 16:13:41 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, x86@...nel.org,
        Brijesh Singh <brijesh.singh@....com>,
        Tom Lendacky <thomas.lendacky@....com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Joerg Roedel <jroedel@...e.de>
Subject: [PATCH v3 0/4] KVM: SVM: Add initial GHCB protocol version 2 support

From: Joerg Roedel <jroedel@...e.de>

Hi,

here is a small set of patches which I took from the pending SEV-SNP
patch-sets to enable basic support for GHCB protocol version 2.

When SEV-SNP is not supported, only two new MSR protocol VMGEXIT calls
need to be supported:

	- MSR-based AP-reset-hold
	- MSR-based HV-feature-request

These calls are implemented here and then the protocol is lifted to
version 2.

This is submitted separately because the MSR-based AP-reset-hold call
is required to support kexec/kdump in SEV-ES guests.

Regards,

	Joerg

Changes v2->v3:

	- Rebased to v5.15-rc1

	- Reworked GHCB_MSR access interfaces as suggested by Sean
	  Christopherson.

Brijesh Singh (2):
  KVM: SVM: Add support for Hypervisor Feature support MSR protocol
  KVM: SVM: Increase supported GHCB protocol version

Joerg Roedel (1):
  KVM: SVM: Get rid of set_ghcb_msr() and *ghcb_msr_bits() functions

Tom Lendacky (1):
  KVM: SVM: Add support to handle AP reset MSR protocol

 arch/x86/include/asm/kvm_host.h   |  10 ++-
 arch/x86/include/asm/sev-common.h |   9 +++
 arch/x86/include/uapi/asm/svm.h   |   1 +
 arch/x86/kvm/svm/sev.c            | 115 +++++++++++++++++++-----------
 arch/x86/kvm/svm/svm.h            |   3 +-
 arch/x86/kvm/x86.c                |   5 +-
 6 files changed, 98 insertions(+), 45 deletions(-)


base-commit: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f
-- 
2.33.0