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 9037F155757 for ; Fri, 16 Jan 2026 00:21:16 +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=1768522877; cv=none; b=XyLda2Pv6G988exbbXZAxADyvy3iw+fNgu7DQF7qXGz7AeSHJtD6u+3TDqgU3pgfOBvPXXBd7TJzIRX1dpjr7HDP7/y3Ho5BdfjBbmicx1gtKJIKnv4tMRhYDNElYIkbiEbsq/8LNhRKmH2ObelldH4BvM37fKfS2S2+mRHHKvw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768522877; c=relaxed/simple; bh=t4vsBeuu0m/0sbK6tArmtIoE1Hem9tL9dmkzDdMchEU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=RAq2BWuFrBzhsGforAMCXrBYdBLBifbiRDCaznfAYXdwtBC9ai4YZzM5WCarCddVuLildh4hXI6bg5pCCVlmOs9UQl9SnDlY5mh8OqL580xlmNDBGLSCFAQlgYKaAzh/k/lBTO++Wtd2ASbgyNMfMR+ChH0o/tq8sGNip7YKxLI= 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=PeoYJwlJ; 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="PeoYJwlJ" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-34c7d0c5ed2so1179510a91.0 for ; Thu, 15 Jan 2026 16:21:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1768522876; x=1769127676; 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=cZIgcvFFF0bBT+nPZ8VSIoYP9P3jFPcW3NBuTLRkaDI=; b=PeoYJwlJpNM01A3zvHDiN4jdPIjZ44TUunJ7YaKae1tUL9SVTs7QyLokMRtHPNIf2Z y32xn1oA0QzS1rnU7TF+6qo7VyVl27EzGBHHVV4dfmOiTEMg1JJ/QPWgdF6KPHsANZYm G5gS3Fce+gM3+l819d+AlK4soxzOIP+X+VqwyhGmJ66E9AKX3IGJIrm9TZ3Ig0ygXBNz namyM2nwwSqIRd0Yxsi7mFyENzMSrXYDwFIIA7W/Y/FXVXPuqlbwmXEy7rv9Y7Qdkn5z OBU+4FysTHl1bdhyk/xnj6aM4EVfWw827GaN05Y+lHeK5tjWq1C5+RIdtYfAXhkqUxN3 9UJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768522876; x=1769127676; 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=cZIgcvFFF0bBT+nPZ8VSIoYP9P3jFPcW3NBuTLRkaDI=; b=p09uwMGs3YXkE1K6mv6FawwkS/jw7k4AOysSdV/i6bgtDPrxKAI1j9MIdfiSJdmh5l WsUH++dPYUmiaG/4jfD0nK6lXaitYD5CoIaRQZ8LlLmjPgSLRlADfjTAeuXQKUQK64j3 kIunazkUTIDj7EKD7TZx5wLpeqzi60eT253xCqn26UxdjJkES2otiuG3Q60+B4PPXiIr wz2eMJUGUZdL67e6NQ0y7KtSqzS24k5Sov+fZlaXe2ztWw1H5SUqCL0IP7r2QHiyvpn+ dIuO5ZrvyYUFqLraCUazaHrGKJTWsXXDId651W0O7ycWvbiHdZDCxIQzViSGJMeFdFAm SRLQ== X-Forwarded-Encrypted: i=1; AJvYcCXGZqqrTknrS3reyH16T+AWXMvvXt06ROcUUNODKQcKpgDBf8Evl45ndMyv81P7HBQ96/LAnPXa4CWOQ/w=@vger.kernel.org X-Gm-Message-State: AOJu0YymEdtcNTuKGukx+RsMGmw25g/Dll2wUTMGT9vnzvDeKABpkmLy rLgb1BeK1YT2n18M+DfSX4dog3gLuf0kQyLOnNSaKVa5Nmtz9yg1F8tW428lXlIfwKR61I6A4t0 up84WWw== X-Received: from pjyu16.prod.google.com ([2002:a17:90a:e010:b0:340:6b70:821e]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3fc8:b0:340:4abf:391d with SMTP id 98e67ed59e1d1-35272ef5bcdmr995754a91.16.1768522875863; Thu, 15 Jan 2026 16:21:15 -0800 (PST) Date: Thu, 15 Jan 2026 16:21:14 -0800 In-Reply-To: <20260106102222.25160-1-yan.y.zhao@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260106101646.24809-1-yan.y.zhao@intel.com> <20260106102222.25160-1-yan.y.zhao@intel.com> Message-ID: Subject: Re: [PATCH v3 14/24] KVM: Change the return type of gfn_handler_t() from bool to int From: Sean Christopherson To: Yan Zhao Cc: pbonzini@redhat.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, x86@kernel.org, rick.p.edgecombe@intel.com, dave.hansen@intel.com, kas@kernel.org, tabba@google.com, ackerleytng@google.com, michael.roth@amd.com, david@kernel.org, vannapurve@google.com, sagis@google.com, vbabka@suse.cz, thomas.lendacky@amd.com, nik.borisov@suse.com, pgonda@google.com, fan.du@intel.com, jun.miao@intel.com, francescolavra.fl@gmail.com, jgross@suse.com, ira.weiny@intel.com, isaku.yamahata@intel.com, xiaoyao.li@intel.com, kai.huang@intel.com, binbin.wu@linux.intel.com, chao.p.peng@intel.com, chao.gao@intel.com Content-Type: text/plain; charset="us-ascii" On Tue, Jan 06, 2026, Yan Zhao wrote: > Modify the return type of gfn_handler_t() from bool to int. A negative > return value indicates failure, while a return value of 1 signifies success > with a flush required, and 0 denotes success without a flush required. > > This adjustment prepares for a later change that will enable > kvm_pre_set_memory_attributes() to fail. No, just don't support S-EPT hugepages with per-VM memory attributes. This type of complexity isn't worth carrying for a feature we want to deprecate.