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

Joerg Roedel
2021-10-20T12:44:38Z

From: Joerg Roedel <jroedel@suse.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