From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) (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 50BD244E671 for ; Wed, 26 Aug 2026 17:12:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787764386; cv=none; b=uQJ/2Dt58YQ+Oev3Utvaw9BSOxNakc1m0BQLa9aUztGMT9V7RWNMzwyRdf4Adhiac+d3NA5DHI7bC0fYH7KldJmeZmoZTP/akVN9kHHDNJxJH6G41lc1QqZ8+ohFlxBhCZRwUWur+heXml+N0Y08jMNVuLj2HRRH5xt9VB6rV4s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787764386; c=relaxed/simple; bh=q6FCE71hqOdUh5ccpzRzeUldvCJyHXHPMQ9uptiqErI=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=MxsrgyMqUai2KCSDIi9zgo/q9EHgzBItShX3hnNLFl3wEzSE3mkKCQShXuShViSEZi25/UMMce+aYUlvWLEnVJLVkJ85sokHTGHShY6pCxBb1xW7+UK8xPn0EXrGEMfeb+SWqYWduuAKSkoYtECH/lq/K89eJV1PRgsn0WZyyZg= 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=kM0NPocJ; arc=none smtp.client-ip=209.85.215.198 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="kM0NPocJ" Received: by mail-pg1-f198.google.com with SMTP id 41be03b00d2f7-cc1cdfb337eso708321a12.0 for ; Wed, 26 Aug 2026 10:12:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1787764369; x=1788369169; darn=vger.kernel.org; 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=BXkEMVsh2+8xb0uflNe1dR/nClI4LJ04DIhwi5akXZo=; b=kM0NPocJ1cvFHYU3RsTe/oi7vgx+FeZ1a4Omkxc49j6sB/0NSCDOT56SqY6SQ4AJwT 0JcQw/0q+f/ixwdWS57ZOwnaIxc4cmhZY8f//G30U3slVWxwKLXv3++lkswUZvcLDZzd CZTLyMhuQNJfN2MSaonqDWkMkb4Tni8zCiCaouBMuM2650JhpUMIoamnqL/kCA5uwT2y 7mnEof/yo4eoRwTZU71i8Sl3c9gzvSuEpbbfbo3wH3J3kSu0sbHFGVpR1FBFmCZHcQi9 xnW0/RKrx3mBElHn2pU3USLjj+W54dQaWL2Q5OPwHHFDl67IxRvqNfjgwgJxjvMLm3e4 tH8g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787764369; x=1788369169; 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=BXkEMVsh2+8xb0uflNe1dR/nClI4LJ04DIhwi5akXZo=; b=RfVQyqp9LsXZFEIlHLhWIuFULj8q1yoSOQdRHPNJOlYfeSzgyQpIy7ccL68H5jhP3Z vNUgadK/qbtv/1gpfjR6UvouLP0AZLpVTlyOthk/Y5WParpDD7mw+3NMQ0nMuLW364Jb WnQmVFlUl+JHk6RT5mDEn/mRasUFrIjsyOdUSeRpKObbiaUkUyFHPQRYFMi1DsOsT9kc I1MvOsYkYlMZSGlhk1bunzJInCD1nKl9XrSen/P/f7AH+ev7gZ0vFOxQ06HAghGqUmFp aKRgiSmrtKke3Pq6q4Me17Rk66hcwhn7WwFzLOz/vg/Fl8aM3wZDU2GYd76P4BKdk08D FbIA== X-Forwarded-Encrypted: i=1; AHgh+RrNdjGeb+TPSZveG7/dVdOFzk3zIm+XjDA8pHO86AF0u122EPZp1dup3Le3ReDaOMQYKPDML3K2Y9mj15w=@vger.kernel.org X-Gm-Message-State: AFuF++kvTaoz7QZppl/nPmFHQ+M4vhDhhcICgEEjArgBv/0y5pIFkshZ 3Zok0m1rqXwQV0KaKr+u7yYAx1KtebE5xawfa842BnDIWXZYXMEQ7h9aU+okvqyofGU2nvs9g9q ZnhM4mw== X-Received: from pgcga15.prod.google.com ([2002:a05:6a02:668f:b0:c8b:2b50:846b]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6300:4047:b0:3d0:cc29:ff64 with SMTP id adf61e73a8af0-3d0cc2a0565mr4203700637.15.1787764368706; Wed, 26 Aug 2026 10:12:48 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 26 Aug 2026 10:12:38 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.55.0.887.g758fc8c411-goog Message-ID: <20260826171246.777729-1-seanjc@google.com> Subject: [PATCH v2 0/8] KVM: VMX: Harden against interpreting TDX vCPU as vcpu_vmx From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Rick Edgecombe , Xiaoyao Li , Binbin Wu , Kai Huang , Yan Zhao Content-Type: text/plain; charset="UTF-8" Move and rename "all" (read: everything I could find) common helpers out of vmx.c and/or replace their vmx_ prefix with vt_, and then poison to_vmx() for all 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. As with v1, the TDX changes are compile-tested only. v2: - Complete my train of though in patch 1's changelog. [Binbin] - Rename vmx_handle_exit_irqoff() => vt_handle_exit_irqoff. [Binbin, Sashiko] - Collect a review. [Binbin] - Move and rename everything I could find, using a dummy "struct vcpu_vmx_tdx" to allow relocating common inline helpers from vmx.h to common.h. v1: https://lore.kernel.org/all/20260814161129.2177118-1-seanjc@google.com Sean Christopherson (8): KVM: VMX: Move the shared "IRQs off" exit handler(s) to common code KVM: VMX: Move the shared NMI handler/trampoline to common code KVM: VMX: Disallowing using to_vmx() in common VT code KVM: VMX: Rename posted interrupt prefixes from "vmx" to "vt" KVM: VMX: Rename EPT violation handler prefix from "vmx" to "vt" KVM: VMX: Use dummy pseudo-overlay struct for to_vt() and vt_to_vcpu() KVM: VMX: Move common VT getters/converters to common.h KVM: VMX: Rename common exit info getters prefixes from "vmx" to "vt" arch/x86/kvm/vmx/common.h | 60 +++++++++++-- arch/x86/kvm/vmx/main.c | 92 ++++++++++++++++++- arch/x86/kvm/vmx/nested.c | 36 ++++---- arch/x86/kvm/vmx/posted_intr.c | 20 +++-- arch/x86/kvm/vmx/posted_intr.h | 8 +- arch/x86/kvm/vmx/tdx.c | 32 +++---- arch/x86/kvm/vmx/vmx.c | 155 ++++++++------------------------- arch/x86/kvm/vmx/vmx.h | 37 -------- arch/x86/kvm/vmx/x86_ops.h | 1 - 9 files changed, 227 insertions(+), 214 deletions(-) base-commit: 76671054f9a1ff6abb976583cd8da37650acdc97 -- 2.55.0.887.g758fc8c411-goog