linux-kernel - [PATCH v5 0/6] KVM: SVM: Add initial GHCB protocol version 2 support

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Message-Id: <20211020124416.24523-1-joro@8bytes.org>
Date:   Wed, 20 Oct 2021 14:44:10 +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 v5 0/6] 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
are required:

	- 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/lkml/20210929155330.5597-1-joro@8bytes.org/

Regards,

	Joerg

Changes v4->v5:

	- Removed stable SoB from patch 1
	- Moved kvm_emulate_ap_reset_hold() and all related code in
	  later patches to SVM specific code, as suggested by Sean.

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

Joerg Roedel (2):
  KVM: SVM: Get rid of set_ghcb_msr() and *ghcb_msr_bits() functions
  KVM: SVM: Move kvm_emulate_ap_reset_hold() to AMD specific code

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

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

 arch/x86/include/asm/kvm_host.h   |   3 +-
 arch/x86/include/asm/sev-common.h |  14 +--
 arch/x86/include/uapi/asm/svm.h   |   1 +
 arch/x86/kvm/svm/sev.c            | 141 +++++++++++++++++++++---------
 arch/x86/kvm/svm/svm.h            |  13 +--
 arch/x86/kvm/x86.c                |  11 +--
 6 files changed, 120 insertions(+), 63 deletions(-)


base-commit: 73f122c4f06f650ddf7f7410d8510db1a92a16a0
-- 
2.33.1