From: Kim Phillips <kim.phillips@amd.com>
To: <kvm@vger.kernel.org>, <linux-coco@lists.linux.dev>,
<linux-kernel@vger.kernel.org>, <x86@kernel.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>,
Michael Roth <michael.roth@amd.com>,
Ashish Kalra <ashish.kalra@amd.com>,
"Nikunj A . Dadhania" <nikunj@amd.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Sean Christopherson <seanjc@google.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH v2 0/2] KVM: SEV: Add support for the ALLOWED_SEV_FEATURES feature
Date: Thu, 22 Aug 2024 17:19:36 -0500 [thread overview]
Message-ID: <20240822221938.2192109-1-kim.phillips@amd.com> (raw)
AMD EPYC 5th generation processors have introduced a feature that allows
the hypervisor to control the SEV_FEATURES that are set for, or by, a
guest. ALLOWED_SEV_FEATURES can be used by the hypervisor to enforce
that SEV-ES and SEV-SNP guests cannot enable features that the
hypervisor does not want to be enabled.
Patch 1/2 adds support to detect the feature.
Patch 2/2 configures the ALLOWED_SEV_FEATURES field in the VMCB
according to the features the hypervisor supports.
Based on tip/master commit a2767e7f31ad ("Merge branch into tip/master: 'x86/timers'")
v2:
- Added some SEV_FEATURES require to be explicitly allowed by
ALLOWED_SEV_FEATURES wording (Sean).
- Added Nikunj's Reviewed-by.
v1:
https://lore.kernel.org/lkml/20240802015732.3192877-1-kim.phillips@amd.com/
Kim Phillips (2):
x86/cpufeatures: Add "Allowed SEV Features" Feature
KVM: SEV: Configure "ALLOWED_SEV_FEATURES" VMCB Field
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/include/asm/svm.h | 6 +++++-
arch/x86/kvm/svm/sev.c | 5 +++++
3 files changed, 11 insertions(+), 1 deletion(-)
--
2.34.1
next reply other threads:[~2024-08-22 22:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-22 22:19 Kim Phillips [this message]
2024-08-22 22:19 ` [PATCH v2 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature Kim Phillips
2024-08-25 12:35 ` Thomas Gleixner
2024-08-22 22:19 ` [PATCH v2 2/2] KVM: SEV: Configure "ALLOWED_SEV_FEATURES" VMCB Field Kim Phillips
2024-08-22 23:31 ` Sean Christopherson
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