From nobody Wed Apr 8 04:39:43 2026 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9EEA83F164B for ; Tue, 10 Mar 2026 23:48:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773186537; cv=none; b=SIpeVQtQhigpgo7W5B0HjPPvl5krEZWt/2AOUzofL/Zh5gSKdsY8xpC5czl9MwoeizX8B+iFzlrnka+mbUVsq+SpME3cxPSzjFA+tILRLdmhLPk+AjQFplHICtKvbFxqncFJrAPPc26Ezhnq4jExB5Lk9MG9d0rP4vOf43rGCVc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773186537; c=relaxed/simple; bh=ijcut67xN4CRBOz4C3fEZ3fWCluP+xATTUXzB3lsp0k=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ZuMzBtB6CpCKPbO4FEz2preG8jGnSHjRPDdWnHZegQhtnNv6pzeV0g2DvHtXwpbRMOJFPs9C2tnzk7JRmLqMK9D2sNqODX8C22taDN5rw6idwxRBII4EZ/eUHZkwlLMeuQcmVrOYR/mIK8kbZ45I4H6ljHzPvchA6JL5g1l7fak= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=OsUl+jc1; arc=none smtp.client-ip=209.85.214.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="OsUl+jc1" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-2ae50463c39so96049055ad.1 for ; Tue, 10 Mar 2026 16:48:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1773186536; x=1773791336; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=IkZbacKi2/io3/Px84Zc7YCbNlt1jj22ioCAhRfNNK4=; b=OsUl+jc1/bmL4GSWMnpdiG7pqpbEIyDU/BsSouSfwt0EhWZM2Lhp2RkMt7dn9MfDPR REi8TkKYBo2LLGWxOiHQx8QrsaWrDsZX6KhsowRcqLMyHtlwORVyF/Coseh4FbaBvZOY QErk8s8TTFEoTVRLrXaN+JaqCn3376e8L72PTBfP9r3MINAveyqT7hbv61APfcyj0Xaa fNtRbWelIgO4TYAYzJUjZxLhDW6xbwBie2il62v07LB3jb6fynJEuEYTxyz+DLtncKov dPNK5DBe4h61FhKpL4ygHQEwK2p10P3Hl8Zroyl3Ymj9TAAS10ettnswIegemhuT9m95 Xk9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1773186536; x=1773791336; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=IkZbacKi2/io3/Px84Zc7YCbNlt1jj22ioCAhRfNNK4=; b=MX6NkPviyZUPmNnt6O6UywqpwauxzUYQmWUJC2rpbhQAWikQ7RpVYNle++oyefwuCP lr9jSHLhsHM/zYcxq53uwYRPrFUCRWw04M+q22eUc4MCAz6+Kv5D7MRyVELLHJxSN5Md deEZn701co5zxdctWKtLb9bom/nDdNfQwYm3herwPCoi5OC4rufHrDeWbnPCRG8TPnMe jxSP1t13Iw2Hs8yYB9RsvsiSlvIHwS+cmc0NrNw8Fgv71DN64yIkccVgpvjvbwIWtcZv 1Wb9GS76Hhw6mpk8cgSb3y2UkWbKXhkVWrvzQeil0gYTgNqW8cmcm9cABc2bFUq/FiH9 vmhA== X-Forwarded-Encrypted: i=1; AJvYcCWFTMOGKyoYZ0aAsvKp07y03f0JQgwCc/yQ2p/YlSR+g7LgcVec+sgypv6vruUKwbxn521Yfood1Ru5WDc=@vger.kernel.org X-Gm-Message-State: AOJu0YxN0QA19IV1AJ79N5Pzrcsqz4KC087ZshJD4wV5V++hAzyUstWv tcN2YtYVKWzggziwFC3ryJTR4ritMnpBmCjY0xQ3J/H20MarZcjO4pptomKJu7NhWkJdUyd2phK OIpPhuA== X-Received: from plbv8.prod.google.com ([2002:a17:903:44c8:b0:2ae:aa88:59dd]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:d488:b0:2ae:5b64:12da with SMTP id d9443c01a7336-2aeae90b632mr4856785ad.45.1773186536084; Tue, 10 Mar 2026 16:48:56 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 10 Mar 2026 16:48:20 -0700 In-Reply-To: <20260310234829.2608037-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260310234829.2608037-1-seanjc@google.com> X-Mailer: git-send-email 2.53.0.473.g4a7958ca14-goog Message-ID: <20260310234829.2608037-13-seanjc@google.com> Subject: [PATCH 12/21] KVM: SEV: WARN on unhandled VM type when initializing VM From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Jethro Beekman , Alexander Potapenko , "=?UTF-8?q?Carlos=20L=C3=B3pez?=" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" WARN if KVM encounters an unhandled VM type when setting up flags for SEV+ VMs, e.g. to guard against adding a new flavor of SEV without adding proper recognition in sev_vm_init(). Practically speaking, no functional change intended (the new "default" case should be unreachable). Signed-off-by: Sean Christopherson --- arch/x86/kvm/svm/sev.c | 29 ++++++++++++++++++----------- 1 file changed, 18 insertions(+), 11 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index e5dae76d2986..9a907bc057d0 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2930,17 +2930,24 @@ static int snp_decommission_context(struct kvm *kvm) =20 void sev_vm_init(struct kvm *kvm) { - int type =3D kvm->arch.vm_type; - - if (type =3D=3D KVM_X86_DEFAULT_VM || type =3D=3D KVM_X86_SW_PROTECTED_VM) - return; - - kvm->arch.has_protected_state =3D (type =3D=3D KVM_X86_SEV_ES_VM || - type =3D=3D KVM_X86_SNP_VM); - to_kvm_sev_info(kvm)->need_init =3D true; - - kvm->arch.has_private_mem =3D (type =3D=3D KVM_X86_SNP_VM); - kvm->arch.pre_fault_allowed =3D !kvm->arch.has_private_mem; + switch (kvm->arch.vm_type) { + case KVM_X86_DEFAULT_VM: + case KVM_X86_SW_PROTECTED_VM: + break; + case KVM_X86_SNP_VM: + kvm->arch.has_private_mem =3D true; + fallthrough; + case KVM_X86_SEV_ES_VM: + kvm->arch.has_protected_state =3D true; + fallthrough; + case KVM_X86_SEV_VM: + kvm->arch.pre_fault_allowed =3D !kvm->arch.has_private_mem; + to_kvm_sev_info(kvm)->need_init =3D true; + break; + default: + WARN_ONCE(1, "Unsupported VM type %lu", kvm->arch.vm_type); + break; + } } =20 void sev_vm_destroy(struct kvm *kvm) --=20 2.53.0.473.g4a7958ca14-goog