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[v2,0/4] KVM: SVM: Add initial GHCB protocol version 2 support

Message ID 20210722115245.16084-1-joro@8bytes.org (mailing list archive)
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Series KVM: SVM: Add initial GHCB protocol version 2 support | expand


Joerg Roedel July 22, 2021, 11:52 a.m. UTC
From: Joerg Roedel <jroedel@suse.de>


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 by 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.



Changes v1->v2:

	- Rebased to v5.14-rc2
	- Addressed Sean's review comments from the SNP patch-set.

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 *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 |  14 ++++
 arch/x86/include/asm/svm.h        |   1 -
 arch/x86/include/uapi/asm/svm.h   |   1 +
 arch/x86/kvm/svm/sev.c            | 107 ++++++++++++++++++++----------
 arch/x86/kvm/svm/svm.h            |   3 +-
 arch/x86/kvm/x86.c                |   5 +-
 7 files changed, 103 insertions(+), 38 deletions(-)

base-commit: 2734d6c1b1a089fb593ef6a23d4b70903526fe0c