From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f198.google.com (mail-pl1-f198.google.com [209.85.214.198]) (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 695C748B383 for ; Fri, 14 Aug 2026 16:11:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786723902; cv=none; b=NxVw4Q5z75gFT1+gFrkh7qFXkgn6lB94CIdOmDeHo0NxRS24KRvvJ9e+ztPrJRyFwKOJTWLCuWMdScFnOGTXXGxtAxEK2mAR/wtTfR6YYIjdSXuYxEmXT8HDUDIvMNvnhJ9K58OGVA0anco4vJlk87E4Vk4z7sjkxLqn69LE+MA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786723902; 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=UdPGMuh/Q6Qh/Nt4wza/Kjiozl4asfkBeDkxy+p6G5c7yP8uAzS3rvfUxxm5pplkQSfIecyIo1IM9gGBMSQ4+TIYP/WQ/b+h0bZnL+r/5OtiedW1XwLC2YR6GmIFjjR4Rdf+ty5+9FXvKaiVMBRDJljskB0OgO8AyesJhx/8rkY= 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=WGJtYjT/; arc=none smtp.client-ip=209.85.214.198 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="WGJtYjT/" Received: by mail-pl1-f198.google.com with SMTP id d9443c01a7336-2cfc52ddc55so15800185ad.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=vger.kernel.org; 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=WGJtYjT/1WAVWPtP7VwUJYF99H4zegvdZoXUWtc6LP+H41erJtTIAsfjmIqmYXPgmw 1ZrrneyH1UawgZx1ppU4sJOhdE8T2j8nPAWheXg3Sh5Gux+p1qK9a/jItHq4MSMxk2x8 NqPACZJWUbrb4vb5Bn+nEGmVG6u3Q46cFyjbMLeDky0G3+8RhpSjUtJGF0UUvFoc3vpw OcINpCRMdtD7Zpx+4JFMlhPPcxUpQmeQ4nuydjG9uZyeQC2QhVWc6SGBm0yO28ydrtbD hi5Ir4qyMa7ixIQ3IU2vgQ8idNTw6CsdOCNID9+7S3OBAE96mHEtaYAzaKWFPWYHx7sk UD+A== 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=sCWUmPEhKrksGU8L8TuQJ+CWeE+Ns9ZMLGN03sQ9KM/vxVvEXrjvlU51GKAPtxSRCE 7P8tMHfsvgsBKL77tO1aWjHV4/A+K5lsnT0joo3+qijLm4lmFNSiLUmx9Ei7ilSJrf2H BANk2utigveXG63vnjCpJGGfN4VzCUdOlbCFddVbHMxWFrzTnz7+77/T7IiDN2BhyVWX 4aS0hWf31O6Zfb/plD+t/dvro42E0u+oGbs0XbSuGFG8EYFDS+qJgP+Pl80sOW05ICyl 6+xW+fHGFWRxPSPRf05UXhSjPgZcKkSkfwP1sLWXChhrFvtIo/74hviz9aF7mIo9vSyw o6fQ== X-Forwarded-Encrypted: i=1; AHgh+RqOdkLOV5HRVN/+OlgIpz1J8DZ8kvyz6KDzMRlq2n52L4pc4TdMON7PHIuRfoYz9H2Eo3hVGWOAeMrn+Bg=@vger.kernel.org X-Gm-Message-State: AOJu0YxqcqXJzklO8uPt8rsd0PP4akcxG4IMPo9k9ZVx3O028xzChqRq FMElCUOXiuHXdk3k/Qx0+RWYt8p9yuu++z0kQu+/5pT/gk4l4h5fDd2DcSn8YLNGAcO1Tz+64Sz IR8I1tg== 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-kernel@vger.kernel.org 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