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Merge tag 'kvm-x86-svm-6.17' of https://github.com/kvm-x86/linux into HEAD

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KVM SVM changes for 6.17

Drop KVM's rejection of SNP's SMT and single-socket policy restrictions, and
instead rely on firmware to verify that the policy can actually be supported.
Don't bother checking that requested policy(s) can actually be satisfied, as
an incompatible policy doesn't put the kernel at risk in any way, and providing
guarantees with respect to the physical topology is outside of KVM's purview.
This commit is contained in:
Paolo Bonzini
2025-07-28 11:37:05 -04:00
parent b4733cd5be 24be2b7956
commit 0097f9df99
1 changed files with 1 additions and 5 deletions
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6
arch/x86/kvm/svm/sev.c
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@@ -2135,11 +2135,7 @@ static int snp_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
return -EINVAL;
/* Check for policy bits that must be set */
if (!(params.policy & SNP_POLICY_MASK_RSVD_MBO) ||
!(params.policy & SNP_POLICY_MASK_SMT))
return -EINVAL;
if (params.policy & SNP_POLICY_MASK_SINGLE_SOCKET)
if (!(params.policy & SNP_POLICY_MASK_RSVD_MBO))
return -EINVAL;
sev->policy = params.policy;