From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f197.google.com (mail-pl1-f197.google.com [209.85.214.197]) (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 86A3C48BD39 for ; Fri, 14 Aug 2026 16:11:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786723900; cv=none; b=PtBoBUWpA1WdfUcbN3OketXcaCoLNGArwhbSIPqQH4p/mdilzdPxnT5l26eDpluxKbS6oGTe7dUtT69yLM2BMUi+7Et/2jA39R8ZzBJCgHjt0GaROYQ2XIrnQ3PVAMxhvHfu6YwrNw7k6nuwmytQUj1fQpnwTJeAguXB+uTRoC0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786723900; c=relaxed/simple; bh=jVDZ6RnPX9na/oXpRc2RUSVKCpg/b4zH+emyqfa+r6Q=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=VJTjuAml55P6xZ4llmbIbfWumk+bC5Cy3V3j7s2TmgeuqYV9DvGsjeL+ohRyWnOoeMowhXnMmY/NfvEjoa6BA3Xm54DBOGf7NbXHkWn9NeVfNrKM6LVbx7/BvB2K1pUMRV0SV4vObkDzl2HqDlfd3Bm/SSR3eZOmEWufUAssQYU= 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=Wag8JI8q; arc=none smtp.client-ip=209.85.214.197 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="Wag8JI8q" Received: by mail-pl1-f197.google.com with SMTP id d9443c01a7336-2cfc52ddc55so15800175ad.3 for ; Fri, 14 Aug 2026 09:11:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1786723894; x=1787328694; darn=lists.linux.dev; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:reply-to:from:to:cc:subject:date:message-id :reply-to:content-type; bh=npuY0OiAv0Qcgrb1+8fGuXoJuldQQTrhGouNj7zkH78=; b=Wag8JI8qpJCzuRHYY9fQx68zqeRoauGDKJV8/bhELoZjUmDuKDiTP32lwoY4IBB5DR QR1DVS+7NmmapU2du9JrtrGrY/2g1jMPa5pTHx5hM1TigDVLtLJI1oXS7Rz0cinbqJVJ rfEEHVcF5HcKpgMk1GADJ7JCIfIm+/kNKZ/3i7/rLGSaLlqC07PQHmt1u5Vg9Bwkw1rt WZnTNQ9sNaw7e7LUM96RfZc4fbSTSLnDYf2DBLBz/LEQZFOkBzIYNEGYjUCWvi55jBn9 zqKXtQL4JYCAQ6Vqc8auxytTCpv3eR7JX3kZh5yWZXJDUz20RNr0NZKLhNQ5sACvANqO rHXw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786723894; x=1787328694; h=content-type: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:content-type; bh=npuY0OiAv0Qcgrb1+8fGuXoJuldQQTrhGouNj7zkH78=; b=EfKolaiDnWi5Ei/lYH1MemBEVi8ycTsRgUJEchZWQ2UWrS2WTjgqQfgQSfG79Xs2H4 Snxu1XYdRa9iHcn06iSrPcaIBbKDh33FB41PuBsDe7gM0N5EMjK7v8s5PSpGGZRVGq1L OgK+g6Ua/gX4LmlyRt98yCqk5zuTu0fd31cqykxmYi9imj7C2QAcIv1Z7DFQTfphRwlt 0k3isljqTS2CunBciYjN4kSye5IvnteKukvu9+JY1iz0qX86vDzFePhJHhfFvv7Ts7q7 /+AKTOgBn9yCbEfxLuxHXXyin19AZzVdnhdfuE+AvVf9qDt6aJcD3cWgd/aKMrNvhVST t2GA== X-Forwarded-Encrypted: i=1; AHgh+RomN/tGsoYXbtIt3Lzsajw+vo4W/N8DGzKQE5QN//yt0aosBd13qr9zd0BcilAx9qvhvVT5zfDnRF95@lists.linux.dev X-Gm-Message-State: AOJu0Yzik0wuYtYOKLUjmYDVdC2M7GYrAS7KFZmUxPgM9Fnjod+Rq1Pm iLxCGUssJOpb9nF0yfzqYKkTslWR4CnmJ3BEd/tr7p1dqLQXlBFqGN+rHTJ0Qb+aRdXZDE05/kU 7jPYZ+g== X-Received: from plou15.prod.google.com ([2002:a17:903:1aef:b0:2d1:1cee:1618]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:ce86:b0:2c8:f34c:82c0 with SMTP id d9443c01a7336-2d3b0aeeb6cmr71992085ad.2.1786723893656; Fri, 14 Aug 2026 09:11:33 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 14 Aug 2026 09:11:28 -0700 In-Reply-To: <20260814161129.2177118-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260814161129.2177118-1-seanjc@google.com> X-Mailer: git-send-email 2.55.0.691.gc56d675ccc-goog Message-ID: <20260814161129.2177118-3-seanjc@google.com> Subject: [PATCH 2/3] KVM: VMX: Disallowing using to_vmx() in common VT code 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" Poison to_vmx() in main.c and posted_intr.c so that attempting to interpret the vCPU as a VMX vCPU will fail at compile time, as opposed to failing at runtime, or worse corrupting state without outright failing. Note, to_tdx() is buried in tdx.c, i.e. isn't broadly reachable, and so doesn't need the same treatment as to_vmx(). Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/main.c | 2 ++ arch/x86/kvm/vmx/posted_intr.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c index aa5b44bb212b..95d89d809c19 100644 --- a/arch/x86/kvm/vmx/main.c +++ b/arch/x86/kvm/vmx/main.c @@ -11,6 +11,8 @@ #include "tdx.h" #include "tdx_arch.h" +#pragma GCC poison to_vmx + #ifdef CONFIG_KVM_INTEL_TDX static_assert(offsetof(struct vcpu_vmx, vt) == offsetof(struct vcpu_tdx, vt)); diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c index 4a6d9a17da23..24221ba553be 100644 --- a/arch/x86/kvm/vmx/posted_intr.c +++ b/arch/x86/kvm/vmx/posted_intr.c @@ -14,6 +14,8 @@ #include "vmx.h" #include "tdx.h" +#pragma GCC poison to_vmx + /* * Maintain a per-CPU list of vCPUs that need to be awakened by wakeup_handler() * when a WAKEUP_VECTOR interrupted is posted. vCPUs are added to the list when -- 2.55.0.691.gc56d675ccc-goog