linux-kernel - [PATCH v6 0/7] KVM: SVM: Add initial GHCB protocol version 2 support

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Message-Id: <20220125141626.16008-1-joro@8bytes.org>
Date:   Tue, 25 Jan 2022 15:16:19 +0100
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 v6 0/7] 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 originally took from the
pending SEV-SNP patch-sets to enable basic support for GHCB protocol
version 2. Meanwhile a couple of other patches from Sean
Christopherson have been added.

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/kvm/20211020124416.24523-1-joro@8bytes.org/

Regards,

	Joerg

Changes v5->v6:

	- Rebased to v5.17-rc1
	- Added changes requested 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 (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 (2):
  KVM: SVM: Add helper to generate GHCB MSR verson info, and drop macro
  KVM: SVM: Set "released" on INIT-SIPI iff SEV-ES vCPU was in AP reset
    hold

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

 arch/x86/include/asm/kvm_host.h   |   2 +-
 arch/x86/include/asm/sev-common.h |  18 ++--
 arch/x86/include/uapi/asm/svm.h   |   1 +
 arch/x86/kvm/svm/sev.c            | 169 ++++++++++++++++++++----------
 arch/x86/kvm/svm/svm.c            |  13 ++-
 arch/x86/kvm/svm/svm.h            |  10 +-
 arch/x86/kvm/x86.c                |  12 +--
 7 files changed, 137 insertions(+), 88 deletions(-)


base-commit: e783362eb54cd99b2cac8b3a9aeac942e6f6ac07
-- 
2.34.1