From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 4898433C53F for ; Wed, 22 Oct 2025 15:06:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761145586; cv=none; b=kQX1HTf0PpjVn95bgx3J4kcbXxBO0HTKro5yW1a50Jd6fjlcXwk0gKKoeVnKV+sZSEpbczuJBGNpz0lqzdBO80EtJcbMde0QgeFXjDesSaoSrpgXUZ5d0Umm0GVacAplfZyk6sZ33Ovr5p3d1gWSN6s0lxvz/9qrF13kaKLJlQI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761145586; c=relaxed/simple; bh=WpipEQJXVYcFkpkRLqzSzEcCHbasdGEjiXt0RvDq5AE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=YMoUfdDw/gsXbj5jOugFWqQDFiLzuGZh+TBvqlS5PJ6Lh3yx2EXf2Ap8JJ/Ih2K9Q104xUF++8znAbCAR8pRWudV9aUCZdtYBICBWrj9TQkO/r4O+wxZf5WWyfT9hWvsdLvSciBGFw7nDkZOyBSpNTtS0ub5Qc31FFKHqBpJT14= 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=dH8wWI07; arc=none smtp.client-ip=209.85.216.73 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="dH8wWI07" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-33428befbbaso7971806a91.0 for ; Wed, 22 Oct 2025 08:06:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1761145585; x=1761750385; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=mbNHPrOmzWNWm5K2/uwLb5lW4ecWkzdO5AE+PIr0iHg=; b=dH8wWI07a3QClUYQRV/CZqdw7NpMtH+hAJHjx2P9A6aHE66ZKfmB6SI+22/VuELdPP ZqeTRTyL7HV4YZQeOEOKHh+LcVKuyEImzydslsU3rMWMYbMobwf/JejqW4ogubHUWX+b 3eMXTIAP/q7wBmlElGCKp7CAboigQA5Q4x//uuW/GHPEZH435seEChVnWD+4ELq7YpTt HeZ6740eQO0GIJxm21zJ9sR86aWPI6FCIYCz4QZPsWRwmJbp5Tp75chCP2SXElIybSX3 +Ut6d5QhWtigr7vY0ZT/M8/yCq1g87x82We17jdbBPRNWMdV7tHzqqJZnfiozY8U9b5u NS1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1761145585; x=1761750385; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=mbNHPrOmzWNWm5K2/uwLb5lW4ecWkzdO5AE+PIr0iHg=; b=tb1lYf0aVg14qDaV4nX11Cz8QpUDTn97yvViFWVqFBoKYPxaAtk0x/cXCa2rkN8o/g GuFmDH9YqvKnETWtir/n3tqtUqloCR4+djsev2xxXmZmyaKLpc+ZCPC7rTNxNArRQm/n csO5pMqkooNs/OtuckL/ZQoiGPJbI30KObsg0arAZYDNU+YtUS8fd1m4aSPLsuxzdgpF dy4zmBp1BBQn0eBs6vT1tobAd5i6jTTcTB3LRUiXL6t8MIPXDhTeMJnNkDlw4ZyH6FXt mBBB8CEq8Mk1JNAlTu7RihMrydQC5ZNLGtw6FvDAVcnkzb2/aIyFN0jHZ9qyOuzabDIK vM1A== X-Forwarded-Encrypted: i=1; AJvYcCUoT3Ulh2cvg/gSe2AuynlmqJH2iMAimxVnlg9Y5zG3v5q4BOiQZFD4LpDaqVZa82UD7+8Wxd4G3tGu2f0=@vger.kernel.org X-Gm-Message-State: AOJu0YwjlwTAdBoDOJMK70tTid2s7PRRB4y6L/blWFm9pad2cxf378UN Ho3cpGTMyHtA3+g0YDlYjGxcL9mls/DuTWcjt5pZGa9jufWLg3+TA/cNydg3jARHOpjARaQK/EX OeziHaQ== X-Google-Smtp-Source: AGHT+IGz5vCeuL6eg8BiHl+RDaAcDo1Jpgx/peM1TaCMEc8yk3bL7cPCwEmOI+HAuhAgN2IA8jgg5UzY0pE= X-Received: from pjbbk16.prod.google.com ([2002:a17:90b:810:b0:32d:a4d4:bb17]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2403:b0:33e:2d0f:4793 with SMTP id 98e67ed59e1d1-33e2d0f5972mr2232790a91.11.1761145584675; Wed, 22 Oct 2025 08:06:24 -0700 (PDT) Date: Wed, 22 Oct 2025 08:06:23 -0700 In-Reply-To: <20251022013657.n2he5yabfgunm5vb@desk> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251016200417.97003-1-seanjc@google.com> <20251016200417.97003-4-seanjc@google.com> <20251022013657.n2he5yabfgunm5vb@desk> Message-ID: Subject: Re: [PATCH v3 3/4] KVM: VMX: Disable L1TF L1 data cache flush if CONFIG_CPU_MITIGATIONS=n From: Sean Christopherson To: Pawan Gupta Cc: Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Brendan Jackman Content-Type: text/plain; charset="us-ascii" On Tue, Oct 21, 2025, Pawan Gupta wrote: > On Thu, Oct 16, 2025 at 01:04:16PM -0700, Sean Christopherson wrote: > > @@ -302,6 +303,16 @@ static int vmx_setup_l1d_flush(enum vmx_l1d_flush_state l1tf) > > return 0; > > } > > > > +static int vmx_setup_l1d_flush(void) > > +{ > > + /* > > + * Hand the parameter mitigation value in which was stored in the pre > > + * module init parser. If no parameter was given, it will contain > > + * 'auto' which will be turned into the default 'cond' mitigation mode. > > + */ > > + return vmx_setup_l1d_flush(vmentry_l1d_flush_param); > > A likely typo here, it should be: > > return __vmx_setup_l1d_flush(vmentry_l1d_flush_param); Argh, I have a feeling I clobbered my branch with a --force push, as I remember fixing this exact problem. Or maybe I saw Brendan's struggles and thought, "hold my beer!" :-D