From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f197.google.com (mail-pf1-f197.google.com [209.85.210.197]) (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 9B7B042BC25 for ; Thu, 23 Jul 2026 20:33:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784838836; cv=none; b=nuXG9xfq3D4BY/zwC2cV2aisTCwA2C9O8koeA/E45Kcs8uy/6fy3PLIqZ6F/QZ6WC6GQUOavgudWvsg74cTPmWhj71biDITbrbVY4QI1erVs77lZvmyUbpCFu6ahUyK7q1t9ATjgpn+FIMfu/cCe/u7zyX75cmfVpVEwHPn/xlI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784838836; c=relaxed/simple; bh=MIy0cVHbfb3m460BkKV/HHfdrajWUPYwhwhBF4VgWG4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=KfTzM9WMIX+D7VxMKoq7ZX1Vx+EaDUo3s0MXfzX95TAlUJ3M+e2Y3KckUlWgg1m4lsNHeMy5kT+EpCG2OyB52fIC7/POtncdcbEA3P5V1UfRwGI3BtYYBQI1SlsQGSylwk2kASr81LfxBE1FZMD0vbbcweBFIAJk4knFuSaMe4g= 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=L7rWYJsK; arc=none smtp.client-ip=209.85.210.197 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="L7rWYJsK" Received: by mail-pf1-f197.google.com with SMTP id d2e1a72fcca58-84870e7f498so1072844b3a.3 for ; Thu, 23 Jul 2026 13:33:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1784838824; x=1785443624; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=xw/oMPXNQ0C5svpcPeCBdR9OoRbIlMVpDTMX8FwewrY=; b=L7rWYJsKP8XfnIXJQ0I5bdDVV+MUjvez8dIYIKcK+BEljP/cqZOJ8YSgg6422u5vvd jrhwd0aKTQErIMge2fNEntqZMqXMuDTEoJNEf1dqtx1jdx6qKOv+QQeJUYW9gqpHjDT5 PWPEinWwrY9/SR79hYkHM7mEwyE+LgeJe7/xSeBiz3c6EvFaM9Zm8r/QO7EShpDnv1Av 4aPzWd+LZdy3YQGCRE5VMu4KT14Uq/CahDNi8J1rqqNB2dlWp3kg+ojS5LLJ2VwGphZt qXZmfndZQuctg92BkamSiMdmba4jwORBH4UTEVGwqfCmWrl4NuDN0oe3bKCPLSuyZPUT CqHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784838824; x=1785443624; h=content-type: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:content-type; bh=xw/oMPXNQ0C5svpcPeCBdR9OoRbIlMVpDTMX8FwewrY=; b=SddPMGjtqLhCcOR+scgOz01efMKy1HbGqb3NBozCMzBIX1CQ+XR8c5oVp7Ti166Ck7 ZYsf9mV0mn3zJ4O3wW3hJEwF+4V9wfdpcQiguE47iLRH155hA/u5Wp0cHk1vmIR5jxTM T2qy2xW3IBqA8+2D3I3HANJEX/gke7fVnMzLnIH72hEEf4p+SlXmdFsKGvCPi/z2DAFg yC8ppCreYbTn8JIVzjKA/JjDPpRIjAanp+VouFdGOdNRNjMTKBJOZ1euPGuwxMVpIX6v rSc86XXhZPA0WJ99h3BryFPDVCk0tQLlI8SC98eaABFtBkWCXIHAOGTP+PyuzudKS5pb w27w== X-Forwarded-Encrypted: i=1; AHgh+RojC9ndrYxNzzIzj71hXkgAv4H2rPIonG6VigH/o0cNiCdfPNOn2hLUMK8WUnVe413i4zZHrRFhPfnzha4=@vger.kernel.org X-Gm-Message-State: AOJu0YwLBsEnt8eRLeiAcMVo066Eh7h4IWBzWjS8kekz+fRrhZ1HH/kM YGPJb+wi30sKiKNfx3T/HQtO9NXac9Gy+uqLmiR3qM8Zjzv8H8ywp6ORXCOg50NyvULhSwDke8c 8mwrxkw== X-Received: from pgbct6.prod.google.com ([2002:a05:6a02:2106:b0:cb5:f989:9b3e]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:2a03:b0:848:5b1e:aec2 with SMTP id d2e1a72fcca58-84e2bba3677mr5125027b3a.54.1784838823450; Thu, 23 Jul 2026 13:33:43 -0700 (PDT) Date: Thu, 23 Jul 2026 13:33:42 -0700 In-Reply-To: <6c560199-1461-443a-b68e-e0297398c731@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260714231015.3337831-1-seanjc@google.com> <20260714231015.3337831-8-seanjc@google.com> <36036850-2d73-4c0f-84bc-64ba542ba425@intel.com> <6c560199-1461-443a-b68e-e0297398c731@intel.com> Message-ID: Subject: Re: [PATCH v5 7/7] KVM: guest_memfd: Rework PREPARE config and hook into a more generic CONVERT From: Sean Christopherson To: Xiaoyao Li Cc: Ackerley Tng , Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Fuad Tabba Content-Type: text/plain; charset="us-ascii" On Wed, Jul 22, 2026, Xiaoyao Li wrote: > On 7/22/2026 12:24 AM, Sean Christopherson wrote: > > I.e. have this at the end of this prep work: > > > > static bool kvm_gmem_is_private_mem(struct inode *inode, pgoff_t index) > > { > > return kvm_arch_has_private_mem(kvm) && > > !(GMEM_I(inode)->flags & GUEST_MEMFD_FLAG_INIT_SHARED); > > } > > I'm wondering if we really need to check kvm_arch_has_private_mem() here. It > looks checking GUEST_MEMFD_FLAG_INIT_SHARED is sufficient. Ya, I came to the same conclusion and ended up dropping that line so that the patch would be a guaranteed "No functional change intended".