From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E7B02D5B87A for ; Tue, 16 Dec 2025 00:20:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 605A16B0088; Mon, 15 Dec 2025 19:20:16 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5BC5F6B008A; Mon, 15 Dec 2025 19:20:16 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4DC566B0092; Mon, 15 Dec 2025 19:20:16 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 319F76B0088 for ; Mon, 15 Dec 2025 19:20:16 -0500 (EST) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id DCCF914040B for ; Tue, 16 Dec 2025 00:20:15 +0000 (UTC) X-FDA: 84223427190.12.6647A0A Received: from mail-pl1-f182.google.com (mail-pl1-f182.google.com [209.85.214.182]) by imf03.hostedemail.com (Postfix) with ESMTP id D200E20003 for ; Tue, 16 Dec 2025 00:20:13 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=google.com header.s=20230601 header.b=is2QP7IU; dmarc=pass (policy=reject) header.from=google.com; arc=pass ("google.com:s=arc-20240605:i=1"); spf=pass (imf03.hostedemail.com: domain of vannapurve@google.com designates 209.85.214.182 as permitted sender) smtp.mailfrom=vannapurve@google.com ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1765844413; a=rsa-sha256; cv=pass; b=0sIx1fp4MGjutf4NoFTFEAN6qWtZpA260SelF0C98V4jwMpuBUrDSB3Ux/Ty9d0sRmO6WC lzhppLM62bIvHlidmrq2GDVKdzClMn13YPjQEsKvkWPRBclfz172r1hPdMQbU0DtbfwvFG DbGUkSNk4wzBAb3eFux5W1gwmdfLvUI= ARC-Authentication-Results: i=2; imf03.hostedemail.com; dkim=pass header.d=google.com header.s=20230601 header.b=is2QP7IU; dmarc=pass (policy=reject) header.from=google.com; arc=pass ("google.com:s=arc-20240605:i=1"); spf=pass (imf03.hostedemail.com: domain of vannapurve@google.com designates 209.85.214.182 as permitted sender) smtp.mailfrom=vannapurve@google.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1765844413; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=I/xSO2loElEQu4qJwQAmc4hWblw65frcVfwyqUV19Yo=; b=ifvL/i74Z100QTLwqwFCDnTRsEaRX4bjTfvWZ4DtDpCswDTwRHpTFYMRc1kFoNcc26mX6v q4VfKtatblJhskQpy1pOmcUj29gzJ3W4jSh907cewjTQxjP3ZQ1syyJX2PX0bCiPYFRStB 4eZ8L3qI5ilS/ZnicTTJAS8rXmg7B54= Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-2a0d06cfa93so14105ad.1 for ; Mon, 15 Dec 2025 16:20:13 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1765844412; cv=none; d=google.com; s=arc-20240605; b=ZhAM3zGMOgi8RnpzHn66rde9PyAkCshae/FPjCJaXKU/bZj/Rq5/BCVgaOlxRUZrvy qHF3vdJRmDyj+CSO+QtQrdvEx0bCgb5DaNX/eOu0IVfnQLFYSkfkXFCcsEOFTZjuln1B MtZAqkhc/G72PH8kBlvJ/i/Jt82iKyZqTwEWebwhwYCPnpqetEK4HStwIlschi98urPr OnRkA+kCmOShk5UaJQhkX3/hwZB6dKX6l40HWVfoh1hUcmfGxtEDPqQk2U2xhcfePlRp vOMEcWnHRnnhzFyB7kpPUSwHwpHH3OAYSHscSTpS131eeF5jvVM/WkIgAMpS9yPqdB8b 2mig== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:dkim-signature; bh=I/xSO2loElEQu4qJwQAmc4hWblw65frcVfwyqUV19Yo=; fh=zh4E5+rGmdxGG0AfBCohXgAOkKb5Niw84iKKr1HWBjo=; b=GeQhHWzNWJk+grkKOOcQvtJt+bzEH+3xUxNjKHeHoTsDtgOkexKz8WRetGFWf8UI1m EDO78V+2Ix8WCzAG7chIqgHwBKoNs9gD8wgsrBpqHeT1bIeBy68cLEjrme0UPen6OZaa l677O0+sd7KiF8ZLssC0pr9LMnDFZh309glRIvD2moOmUkSd06kuGUxYhwPfA1OgDD7u YIiQqdxmFH9ZryeLN0VPFdqszguiDmUz7VKOLHpdE0oFN3wWfV++LJrjMzUz4VIasChD 0hyIz/uI/whXvXpERDOOjreIGhqMfKyCtdOAXtMpyVwiZzSlLo/Jpm8QC6CHiLN/QEju 37UA==; darn=kvack.org ARC-Authentication-Results: i=1; mx.google.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1765844412; x=1766449212; darn=kvack.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=I/xSO2loElEQu4qJwQAmc4hWblw65frcVfwyqUV19Yo=; b=is2QP7IU8E0N3xcB+Yyt9YxjQM+n2jrV5yYP4qMn9wG+bb6oKOcVJmCJvtzqKJ/X1v f76pCKGY7dEeM+PInDGoZ6jyIkmL0/KezC1dxjmnHOhqiE2ZDC6DCk6bYJazNTyyVQRi zq+s+HM1cf1asjYefPmUfAbvEHGpIbtURmLU6yak1NnJ8fl/vdjeMQo+P5rW/YUJrjhd ozw6eX+7yhjNGJPYRgZnXit9bTsEt5Ww5rzUQ+c83XViZzLjyZOxomQ5Qyso0DHiWWJY 9FXRSeT0ltR4ngDbGQ9DVMVCN+9R528Iwx2HSKEqj5N6/kSQkjY7hyVT9RLEwV/GVp5L ULvg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765844412; x=1766449212; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=I/xSO2loElEQu4qJwQAmc4hWblw65frcVfwyqUV19Yo=; b=g9kKjNUcQtUNTpmrsGaphpmfkPJCr35MZz8mWnzMVYz63YROnuGs5KjkExK2sC+Jhf NbmYoQipPbdp06qdBrRKS2HqnzU3Z8XB+FstzanuC6O4oSoDZ/JoIkX0p1yYZexIuiF1 5nlSxUvSwqQqiH4+AoNloo8DTsnS/m/fVMFrh/M3Dk0PkMtrQbU5piXMXuN3mVk+leWf XHRKf3wkBKPDAUCOXgmySkhIKQ5+qPUI76iLreEDq7EvbaudcrbdCPbbKoniMzq64IS3 L2m36+gyi0Iv35u4gtkJFesGioWwexteiM4adUHG8K/wVkjEJh2WjVP3piahcV/XYNup C0+A== X-Forwarded-Encrypted: i=1; AJvYcCVTLHRv9WgEKUfGiQA2N1aupOhJOfPc+PVE+lpJKoWEdXXVwYB2tFlha608C+SsyiTa+4N5q/RTwg==@kvack.org X-Gm-Message-State: AOJu0YyQxk1RL+FxT4wjav4lDGPNkIjNuJp5r6F/zDjtrjXy4R0qHNMG J8QWsXZ6UJbFXSgq4Q7uMRvq3elLgDEDdkUQ16Ds4yH0VO7RmAa2b1BjktdiynM3n1SEyRSE3QJ uP5qou823QeapbGNJ/vp6sJUpxan662PwyRlOUlt8 X-Gm-Gg: AY/fxX7mI4ojycEryJEl1ZRXAdBZptnR8nB4Z9oQ0GG5MtOhKQD8kGBbwMmAcNieLVg h5VqIQJRN6qdorfJ/XJbVsDA3OxMlOw3gfRM22HvoVAA9S1BSPPug2dUnuIkUhHTu0h2E5YzkT4 K+RPBK6O2mYdgKfZPrywGVf41r/sUo/bW7/Ni0i/3TyoLzu5bxH53mFV0z5ZqzKpEJy/uHa04dT rAY3A59I40lFfdMJlEGsohwFcqo8Jhg7tFhLJvQSFNLjhGWBF4Q4dqyYk6vo4BuIg/wjDjRpuaL 72G3FFaMRkW1+XEu3mYP/yvYFH97 X-Google-Smtp-Source: AGHT+IExDYh7puOwTqAoucyAbhg/dhJj/UlPMmB4InOhmz+VivF2pgRZLSSnb0+pKynoL6YupSskmHHY1LN9azC6BtE= X-Received: by 2002:a05:7022:4406:b0:11b:3bc:9ea0 with SMTP id a92af1059eb24-1205727676cmr408c88.6.1765844411980; Mon, 15 Dec 2025 16:20:11 -0800 (PST) MIME-Version: 1.0 References: <20251215153411.3613928-1-michael.roth@amd.com> <20251215153411.3613928-5-michael.roth@amd.com> In-Reply-To: <20251215153411.3613928-5-michael.roth@amd.com> From: Vishal Annapurve Date: Mon, 15 Dec 2025 16:19:58 -0800 X-Gm-Features: AQt7F2pam8UulXqTs359SLpQ8QESA_W2EL2-JVHHwFHsPgJIIvSeUBgNcYPP6kk Message-ID: Subject: Re: [PATCH v2 4/5] KVM: TDX: Document alignment requirements for KVM_TDX_INIT_MEM_REGION To: Michael Roth Cc: kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, thomas.lendacky@amd.com, pbonzini@redhat.com, seanjc@google.com, vbabka@suse.cz, ashish.kalra@amd.com, liam.merwick@oracle.com, david@redhat.com, ackerleytng@google.com, aik@amd.com, ira.weiny@intel.com, yan.y.zhao@intel.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: D200E20003 X-Stat-Signature: 8tk4srpmfqj3itn7u8gtwzom8jxkc6ah X-HE-Tag: 1765844413-691147 X-HE-Meta: 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 /3cMmTBL 1gtE96be6H5wlO0ptQ9eU6PBBtBUT+gP+XaTgVH8oI3Q0E7pA7BArDypaLCmip/S00areKYtx4G3iDFe4vhU2AChe2Ca5EQFqNeQomd1QY9mRmk0ex2MR190ssjC3UXVFXpeFQ4yA2wyKEQuxoD4f6PdqD0Rg+hB6sLv1YJKWaw4MtLvnSLV2E/Hka3pXFj1BIA/RUUTOIwK/U1q8DF6eBUdjw5Kz7dIcSaUD/MKijesH9Ay//w3ujlV5jCsuAHxezBexh35KpM0cERyha4JrWY7BH+o6XGE3sf45elcqst5GxLP4PeXNvHY3nwAgDJNMPRZZSwXo+CnKYfo= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Dec 15, 2025 at 7:36=E2=80=AFAM Michael Roth = wrote: > > Since it was never possible to use a non-PAGE_SIZE-aligned @source_addr, > go ahead and document this as a requirement. This is in preparation for > enforcing page-aligned @source_addr for all architectures in > guest_memfd. > > Signed-off-by: Michael Roth > --- > Documentation/virt/kvm/x86/intel-tdx.rst | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/Documentation/virt/kvm/x86/intel-tdx.rst b/Documentation/vir= t/kvm/x86/intel-tdx.rst > index 5efac62c92c7..6a222e9d0954 100644 > --- a/Documentation/virt/kvm/x86/intel-tdx.rst > +++ b/Documentation/virt/kvm/x86/intel-tdx.rst > @@ -156,7 +156,7 @@ KVM_TDX_INIT_MEM_REGION > :Returns: 0 on success, <0 on error > > Initialize @nr_pages TDX guest private memory starting from @gpa with us= erspace > -provided data from @source_addr. > +provided data from @source_addr. @source_addr must be PAGE_SIZE-aligned. Reviewed-By: Vishal Annapurve