From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 AA5852BAF7 for ; Thu, 30 Oct 2025 00:18:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761783503; cv=none; b=SrmkszD29Uph96MLZbyGC+L+sazf5fy9KngTAkp1TVxDzWJlaXoKTKKF2D+adpmAF6N1pPqr3GIC7xTduPnZYQlXCLcF4AuX8jND8MvGRBHhv7wzTVV7sMOrc2oM4g8TbL8K8AWSpWUH8pyw4pPyAYxXD1cVP4s23gmn+YbtfWg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761783503; c=relaxed/simple; bh=JB2LEI4A5f74efQFX9e5urcPJQDPxTpuN3kVdrHIaT0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=G53nObXuyCOnl7UTMo1WV5kcRGgnIw3gNeXadwRlOGoOSNOyVvTTeCdSoISAwDop2vqqdL94Sl4TKiSA5jyffIeVqPPr9ZLGGnbChuo8hieskGwgh9d662HnfaiuKnVCDz7mvn/SlQ1Dtk9ZcOh+6EO6+8Ih1xlkvsYsTzStS0I= 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=U1tQa/lU; arc=none smtp.client-ip=209.85.216.74 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="U1tQa/lU" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-33da21394adso453003a91.1 for ; Wed, 29 Oct 2025 17:18:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1761783501; x=1762388301; 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=/APfDoAjvMMG72cPIAEX8+eFsFzG2tjZbjY4ARPdXLk=; b=U1tQa/lUxRET/55TrDwLmrrNvr9F3S3XMubLthBkpb2ZVAYLBQOCwH42i+swheWPsn K+9IM79yaiW1SshvqUOj3Gv7CSszZphZ5rtr3urSrTUZrDuMjhKTrZkIN/KrWKzVXVm2 BdvJK8q/D0unbnJQu82djqqZmMr8JzIbctJogNwm6Rj8xWfOk/Sfe04XA7/4CLxVcqce N3r+DBdQaX4YI/vdjzMwl2q5uSi9ef+SpQAfV6PSga6RXpYutCR32U3g7V5TNzMF0zgY i5+FZxJNd0VCzXjMrhwFtwz/9R1QYWeDlqbbb6ZNOGpwOa6wZzVt59lNdqSk074d7FCi rRRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1761783501; x=1762388301; 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=/APfDoAjvMMG72cPIAEX8+eFsFzG2tjZbjY4ARPdXLk=; b=o/ql7XNZ686uM+Z5HkPc5koJHOTQTmh3U8gK72mV3JZNirujOZtkCG5JhOkz23zKv5 x20Kt/Ke7W//Zeb+rL1PMDLijaa/ncP2ZOlb4O06mo9NYk+yuF0PKmEXIezL449Avc0+ Uy8sSQY3KFn9nBi98GPfsGC+C6Z9VM8kA/l0UjB9/NFZji2+hQBJ3NevvJMFCzw9vb+h qCpxV+vIePTevyx18p0XKGUqk2kh/8cInDwy8RS5CeFH401k1wJnW4KiRyMc/2m9/B0k omgbPpiWj/PbFExmKFJtWPiDI1Nnt+yry17NLvwhbq/LRSRVosz+G7T8QYvuj/kGENkV 2dWw== X-Forwarded-Encrypted: i=1; AJvYcCU1porbUKOZwxLLWNkbNMaktigdioKs1Bktm9380b7lxzfIDBsr+yaO5lkfh61il+XKkP24xW923K/vLSw=@vger.kernel.org X-Gm-Message-State: AOJu0YzWEm9FrVlc7KMGCPhtzT2+kKYm3BDzTV3v60xi3hoaes1YcJPh Dfl3JVvWPANtMMdwRA6+3F1/WQGkWc9+bmPJw42e/NcG3eYyN2Ll4uZPsW5kqihhj1k6/OcH1RG Kj80+6g== X-Google-Smtp-Source: AGHT+IGgocyQQIi5AG23kjZirIFz98FRrrSK1VO35VHRCnkojOzL21/TedfvF0EX8P2/KGVYsS95rTUFxFY= X-Received: from pjsj7.prod.google.com ([2002:a17:90a:7347:b0:33d:61e3:893]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3912:b0:340:299f:e244 with SMTP id 98e67ed59e1d1-3404c41b811mr1502709a91.12.1761783500906; Wed, 29 Oct 2025 17:18:20 -0700 (PDT) Date: Wed, 29 Oct 2025 17:18:19 -0700 In-Reply-To: <20251029-verw-vm-v1-2-babf9b961519@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251029-verw-vm-v1-0-babf9b961519@linux.intel.com> <20251029-verw-vm-v1-2-babf9b961519@linux.intel.com> Message-ID: Subject: Re: [PATCH 2/3] x86/mmio: Rename cpu_buf_vm_clear to cpu_buf_vm_clear_mmio_only From: Sean Christopherson To: Pawan Gupta Cc: Thomas Gleixner , Borislav Petkov , Peter Zijlstra , Josh Poimboeuf , Ingo Molnar , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Paolo Bonzini , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Tao Zhang , Jim Mattson , Brendan Jackman Content-Type: text/plain; charset="us-ascii" On Wed, Oct 29, 2025, Pawan Gupta wrote: > cpu_buf_vm_clear static key is only used by the MMIO Stale Data mitigation. > Rename it to avoid mixing it up with X86_FEATURE_CLEAR_CPU_BUF_VM. > > Signed-off-by: Pawan Gupta > --- ... > diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c > index f87c216d976d7d344c924aa4cc18fe1bf8f9b731..451be757b3d1b2fec6b2b79157f26dd43bc368b8 100644 > --- a/arch/x86/kvm/vmx/vmx.c > +++ b/arch/x86/kvm/vmx/vmx.c > @@ -903,7 +903,7 @@ unsigned int __vmx_vcpu_run_flags(struct vcpu_vmx *vmx) > if (!msr_write_intercepted(vmx, MSR_IA32_SPEC_CTRL)) > flags |= VMX_RUN_SAVE_SPEC_CTRL; > > - if (static_branch_unlikely(&cpu_buf_vm_clear) && > + if (static_branch_unlikely(&cpu_buf_vm_clear_mmio_only) && > kvm_vcpu_can_access_host_mmio(&vmx->vcpu)) > flags |= VMX_RUN_CLEAR_CPU_BUFFERS_FOR_MMIO; The use in vmx_vcpu_enter_exit() needs to be renamed as well. The code gets dropped in patch 3, but intermediate builds will fail.