diff options
| author | Sean Christopherson <seanjc@google.com> | 2026-03-11 02:48:14 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-04-09 02:04:23 +0300 |
| commit | 8075360f3b9648abe58bcedcb7a27d83d9bf210d (patch) | |
| tree | b668c70f81277648cc07cd03fd32eea4c3656efd | |
| parent | cb923ee6a80f4e604e6242a4702b59251e61a380 (diff) | |
| download | linux-8075360f3b9648abe58bcedcb7a27d83d9bf210d.tar.xz | |
KVM: SEV: Lock all vCPUs for the duration of SEV-ES VMSA synchronization
Lock and unlock all vCPUs in a single batch when synchronizing SEV-ES VMSAs
during launch finish, partly to dedup the code by a tiny amount, but mostly
so that sev_launch_update_vmsa() uses the same logic/flow as all other SEV
ioctls that lock all vCPUs.
Link: https://patch.msgid.link/20260310234829.2608037-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | arch/x86/kvm/svm/sev.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 709e611188c1..15086ffe6143 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -1037,19 +1037,18 @@ static int sev_launch_update_vmsa(struct kvm *kvm, struct kvm_sev_cmd *argp) if (kvm_is_vcpu_creation_in_progress(kvm)) return -EBUSY; - kvm_for_each_vcpu(i, vcpu, kvm) { - ret = mutex_lock_killable(&vcpu->mutex); - if (ret) - return ret; + ret = kvm_lock_all_vcpus(kvm); + if (ret) + return ret; + kvm_for_each_vcpu(i, vcpu, kvm) { ret = __sev_launch_update_vmsa(kvm, vcpu, &argp->error); - - mutex_unlock(&vcpu->mutex); if (ret) - return ret; + break; } - return 0; + kvm_unlock_all_vcpus(kvm); + return ret; } static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp) |