From nobody Sun Feb 8 16:31:34 2026 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (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 7DAF1233711 for ; Thu, 16 Oct 2025 18:21:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760638917; cv=none; b=C+jUwgh78avHziQid/wLnl7RIWB7wcekSj7QST8fpG7rQxGyVLeqdQa9BcXAqOp3WbYhgsgCzqzkCKo+3PGyjYTDsR4EBrS7WkavADYc6hPgcEXvRFBLt8KA3D5DkJKyquBDdc8AeAkUpar+ZtWjspjRXMTkIGpjQcwiWzPife8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760638917; c=relaxed/simple; bh=5E0C6i+nRm6fQLpXNiWJmnym7Onqera4NouEl8JYjVs=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=HuFjnzSs5xGizfRQR/1u3xfx/xx/cM2gGMwQ11LWs08IQdtMXPznsn2f575f6JAIetE3tHDqkupuYcoltVaka7xBH15iI4P44QnTGyA70KCNUKRNOWMyfu6fSvE6qbaj4eJ4UtshzyCK0ghqtW/NLiwtPkBukkdaZeUqf18nY2Q= 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=DDFPWLE9; arc=none smtp.client-ip=209.85.214.201 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="DDFPWLE9" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-27ee41e062cso15728455ad.1 for ; Thu, 16 Oct 2025 11:21:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1760638915; x=1761243715; 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=dg+uTAFM7lbsn7WFz9CbnP/ajLiTUmOm0LwLzXdzdtE=; b=DDFPWLE9P74ecLSNE7DSPHOzLGwTdoG80kdDtSY3D5uWDVUFjkJmVnMaNg7HrF0766 4q10AakPEociADNv0hiMCfjYN4oYbuHRVXFC/l9a87qYlq7JphgCx5a2gBkQgVQ0hLP/ WezqzjE795hTpmlgJIMA+3SmvmqBKLmC98nkdyKusdP+Bp0MdZ3QFt++Q7AmJKNhzrni t3fhAI/E1TYYL4sMJwHlsVJjdhTLMK6bBbe8flDYjZUVY6sQUILdPsTkES/H061gksON oufwemDb0tgnchUsKY+QkmgZaHRQwf0hJ/nOw4hQe/bPmYA6orEfLzu7mrqiaLqocK4d U2AQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760638915; x=1761243715; 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=dg+uTAFM7lbsn7WFz9CbnP/ajLiTUmOm0LwLzXdzdtE=; b=oq2RYsraltQj/OJsSGvicS8ocAEQiV0Jn1FEgVdeDGHXRFyXTUSZHK2Jy9oGORMFam EfG6hWqD1cd6DhO36IDBlv5nqIAdO3jNmCtXXcYLP0Th1riv1zTRPOCzxwsSYSTCfcJ7 I0Xxt6hsMGqyFGc2HyA5s2/xq2NZhS1xM5EWAFi8HDlUHvP/f/nY6T2q8AarwE2ujka9 oyPYeiDWQNRdMqZaSpNa9nWih3yv4oRU99Km40/JVm4tUN8Xyp4/3mjD+oE++gsJKz2h hy4wIGLaM7ZdK6cX9VmuOWAE2F0jGqOu7m+N1rJ1McyxmZ5I13aQ8hpqL7cQQVDlpLOT XSrQ== X-Forwarded-Encrypted: i=1; AJvYcCVg+xpqVCBglreoQO4hnpPLgS8UrfVcq8P5cf4fOzHQ6A29PjCZWrCVQ30ftv+npDP+I3mg64TDWTv+7JM=@vger.kernel.org X-Gm-Message-State: AOJu0Yze8OIi9zDjD3lOuqH7eMdF40yivHWHxvBF37O2KbTf4b/8megF M5BGxZD95+2iGkAvISnYg9oIi19xLXeOEPivb8q9Ky87O0huYl2Ba2vF1BAQrcCLETtBhA2CVMf Fw6PxwQ== X-Google-Smtp-Source: AGHT+IHLX+JIJP/xpi0UAaW6TGcXgazhRaRJEBLzAroZBMicx8wFXjI+9H930mLGqANzA7DPXew0mwyUPZE= X-Received: from plbmo5.prod.google.com ([2002:a17:903:a85:b0:290:b136:4f08]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:eccb:b0:276:842a:f9a7 with SMTP id d9443c01a7336-290cba4db6emr10000875ad.57.1760638914703; Thu, 16 Oct 2025 11:21:54 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 16 Oct 2025 11:21:48 -0700 In-Reply-To: <20251016182148.69085-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251016182148.69085-1-seanjc@google.com> X-Mailer: git-send-email 2.51.0.858.gf9c4a03a3a-goog Message-ID: <20251016182148.69085-3-seanjc@google.com> Subject: [PATCH v2 2/2] KVM: TDX: WARN if a SEAMCALL VM-Exit makes its way out to KVM From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Kai Huang , Xiaoyao Li , Rick Edgecombe , Dan Williams , Binbin Wu Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" WARN if KVM observes a SEAMCALL VM-Exit while running a TD guest, as the TDX-Module is supposed to inject a #UD, per the "Unconditionally Blocked Instructions" section of the TDX-Module base specification. Reported-by: Xiaoyao Li Signed-off-by: Sean Christopherson Reviewed-by: Binbin Wu Reviewed-by: Xiaoyao Li --- arch/x86/kvm/vmx/tdx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 097304bf1e1d..ffcfe95f224f 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -2148,6 +2148,9 @@ int tdx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t= fastpath) * - If it's not an MSMI, no need to do anything here. */ return 1; + case EXIT_REASON_SEAMCALL: + WARN_ON_ONCE(1); + break; default: break; } --=20 2.51.0.858.gf9c4a03a3a-goog