From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f69.google.com (mail-pj1-f69.google.com [209.85.216.69]) (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 73EC048C3F2 for ; Fri, 14 Aug 2026 16:11:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786723898; cv=none; b=q7EarnFoiRvR0zoqCZl0fwjQ3LNUOovQfInVbv88P4cMWWyjPnMecQQFho6h2xMWBC3c1HaIR47vvuwogDiMxaScj1fRm0nlrSbDRM6laID3wYYz93n9cSGQm2HeUey7M/09h1rHFmkM9XpmVhIVwgquCFSBVqNzL3/5CnzY018= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786723898; c=relaxed/simple; bh=Yjwp5sXg8hA+IFzilFQC+IgVznGjRjghxOVmLb6eHpE=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=jTx69DiHpI0BqPDjF+Rj7EODmwy9A9TA5+clbLPEUIWyfYbNLW524+l0mrESR/fCzXyAt+Y7UWx8o70f+os/Q3bDMMnhZGsgI1wPgj65fMl2865g9MCDMwmtLGt2P7g9w/aNttiaKglso/PqLhJsDd75PVB8YB7V17/Occ2QxI8= 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=Dd6KmCmJ; arc=none smtp.client-ip=209.85.216.69 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="Dd6KmCmJ" Received: by mail-pj1-f69.google.com with SMTP id 98e67ed59e1d1-38ce7fabf76so1644471a91.2 for ; Fri, 14 Aug 2026 09:11:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1786723892; x=1787328692; darn=lists.linux.dev; h=content-type:cc:to:from:subject:message-id:mime-version:date :reply-to:from:to:cc:subject:date:message-id:reply-to:content-type; bh=G1QOpGA/mOfm9r1jqGgG0mT+xGoxs+eURoQ2xm4eLKI=; b=Dd6KmCmJl56zKH88udMe3LLrwqdnhFodeIRTpTpYrNo5SFhvkpj/jvi6CPMK7k0c27 PlKwkHoHK0+OjS/cQUQGkGVAX5j/FQGCB2JxTpbeNga9GoLl1oW7sTlgToQO0mI8aFh1 VDrbDe0Xap6IgPi2eCygSU8TrkAha1VyUv+w+o8tiH4gV1KSiBvk0RZAcdWpUsBafDA+ hZBkPy59dvcPNX5YqQ7sQsHnQPQbaawRuB6rTWjI4Gg0qT/6APnZdJBXSxksO5K2EkEI xJBKhmnfAiEb9pas/06N3LgHXiGacf3EnxTx4c63RqaddTMb4k8etx3qofgZvUeIOyFE SdaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786723892; x=1787328692; h=content-type:cc:to:from:subject:message-id:mime-version:date :reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=G1QOpGA/mOfm9r1jqGgG0mT+xGoxs+eURoQ2xm4eLKI=; b=Nh5DX6By5oK0fHmqzUrzWHxuH7VNRkPVCjko7aM7OdT0gYo3pa+TqbA9ag3UKHdRjK 3Y2kI678q8/chlXxCr3OmgFvAUPQoVvqZRXNsdpqYF6sghKhqlx04KwIHdCTA2GNV8Eu U8tSRVtNVAhl9ImyDwMHLWbRa3GEjNZ9WREk6p/t2aa5DdknLC1vJ5atIV2zOidGi4y+ JmGgEwzKyYe39gHyxuP3nb1KpEdcJBjjMfsKyw38JPNy4urP9dorwgqctiymoYnQkxEj BC1hB/DsswsZlLvkWAuf/36M1CezqNXpArm98/CQMskXTvQWIxUCi0sWwTmTtx/JbQh1 2Bfg== X-Forwarded-Encrypted: i=1; AHgh+RrmTmrjLT00q+uJKdIktwuukjesN8mb6nHQJyzHoOnXyBQyQ7prxUKYtaqm5rf/2Rdh0KULQMNiuq8F@lists.linux.dev X-Gm-Message-State: AOJu0Yxby2LlJwgzG6iNnZJZm36CMZi7M8ViiuO3DaS2Oa6QredPuglU R8mMaM/k4bVomK8jSj2gd2dQWHfmRG/AjtC2Xe6qTelULAgyoaExlJ5DgiDeAXWGeX1RSEBYygY VQWnUKA== X-Received: from pjte4.prod.google.com ([2002:a17:90a:c204:b0:38f:749d:db46]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:384b:b0:37f:e1af:df22 with SMTP id 98e67ed59e1d1-3933ba90e38mr7162627a91.17.1786723891326; Fri, 14 Aug 2026 09:11:31 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 14 Aug 2026 09:11:26 -0700 Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.55.0.691.gc56d675ccc-goog Message-ID: <20260814161129.2177118-1-seanjc@google.com> Subject: [PATCH 0/3] KVM: VMX: Harden against interpreting TDX vCPU as vcpu_vmx From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini , Kiryl Shutsemau , Rick Edgecombe Cc: Dave Hansen , kvm@vger.kernel.org, x86@kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, Xiaoyao Li , Binbin Wu , Kai Huang , Yan Zhao Content-Type: text/plain; charset="UTF-8" Move vmx_handle_exit_irqoff() and all its helpers to main.c, and then poison to_vmx() for the common .c files to harden KVM against misinterpreting a TDX vCPU as a VMX vCPU, i.e. consuming to_vmx() on a TDX vCPU. Spotted when working through the bus lock series. TDX changes are compile-tested only (one of these days I'll track down a host that's fully TDX-capable). Sean Christopherson (3): KVM: VMX: Move the shared "IRQs off" exit handler(s) to common code KVM: VMX: Disallowing using to_vmx() in common VT code KVM: VMX: Rename posted interrupt prefixes from "vmx" to "vt" arch/x86/kvm/vmx/common.h | 6 +++ arch/x86/kvm/vmx/main.c | 75 +++++++++++++++++++++++++++++++- arch/x86/kvm/vmx/posted_intr.c | 18 ++++---- arch/x86/kvm/vmx/posted_intr.h | 8 ++-- arch/x86/kvm/vmx/tdx.c | 4 +- arch/x86/kvm/vmx/vmx.c | 78 +--------------------------------- arch/x86/kvm/vmx/x86_ops.h | 1 - 7 files changed, 97 insertions(+), 93 deletions(-) base-commit: 1b731e5ded480bd1e5546aed35584238661ce72e -- 2.55.0.691.gc56d675ccc-goog