linux-kernel - [PATCH v4 0/5] KVM: SVM: Add initial GHCB protocol version 2 support

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Date:   Wed, 29 Sep 2021 17:53:25 +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 v4 0/5] 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.

The previous version can be found here:

	https://lore.kernel.org/kvm/20210913141345.27175-1-joro@8bytes.org/

Regards,

	Joerg

Changes v3->v4:

	- Rebased to kvm/queue
	- Addressed Sean's review comments on v3

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

Sean Christopherson (1):
  KVM: SVM: Add helper to generate GHCB MSR version info, and drop macro

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 |  14 ++--
 arch/x86/include/uapi/asm/svm.h   |   1 +
 arch/x86/kvm/svm/sev.c            | 131 ++++++++++++++++++++----------
 arch/x86/kvm/svm/svm.h            |   5 --
 arch/x86/kvm/x86.c                |   5 +-
 6 files changed, 112 insertions(+), 54 deletions(-)


base-commit: 8960bc57dfb78f5de088af800576d9096282dca2
-- 
2.33.0