From nobody Thu Apr 2 17:10:29 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B66F1373C02; Fri, 27 Mar 2026 16:23:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774628602; cv=none; b=kMyAyMtmRfIS1z+Suv06Ypx5dAIm7+gAZjFUxX4Kfe/3fYhbTX3ZGNRXpiwmgJuVlyHuwHD7xFBLxzSunk+N9OoUsGBDzzHGh/8dbyIybx6EgHn+tlsgjr6yMNIZlOm/O7AXZPIPy34R9wgWaxE88ok5OE0fKvnQuM8JwOYSpTY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774628602; c=relaxed/simple; bh=WGFPbx7sgPfDQCJrPwMdxh2FwqrprHEWOswcgWAGZe0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=C6Z/Eh37+S84AnYuJBDmPUN9nAui1YhKulQx74ZYMxKeHrNM+n0Bv+gXFYnXVydMW1tjHITM/R/aGf6lew3OPXaoenjbplWQqkNfVxW/f5i+n0JdsCtgCTn2Xpd/4Bg3R0KGFGhMdobQ3hLq8IeSr7Fn64hU0EBK13eeBEzTs98= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=GV8be0Ij; arc=none smtp.client-ip=198.175.65.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="GV8be0Ij" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774628601; x=1806164601; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=WGFPbx7sgPfDQCJrPwMdxh2FwqrprHEWOswcgWAGZe0=; b=GV8be0IjvNWMi5nCPKo9F9Ke9VfCO2nN//gkipA/uHQlCUgNGjH6M4wd vhlNRGnLcGRG7aKxXgS25ltEwEjinntWpu9mE2QfQLs66w2rPmdOBOUOJ FyQxiF8CTTbqWPF8eSLJIdo/Y0MriFpq1aOtyncTGSZALVbM37Bargbwn WlrV3ipwPxCPgTpfO4d9Uex+JUGTrlwDq53UdJsWidrYpWHl/Yxvu97X3 3m7iirmSsFm1S7Lr7NHB4EVh+zX/U+lWsnmI8agdd/6FaDZ1VzuGvWon4 LIjRMUXpnzG5GDd/60kFNHT/4mnLRpQGjG8RCx3adovKTmFMY/j1N/IqG g==; X-CSE-ConnectionGUID: EMa/TsdSQpmLCxcYfqtmqg== X-CSE-MsgGUID: t3PD/HiWT2KLe0pMUT2ktQ== X-IronPort-AV: E=McAfee;i="6800,10657,11741"; a="79565575" X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="79565575" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 09:23:21 -0700 X-CSE-ConnectionGUID: J1a8EKhESLywQV8Ib29x2g== X-CSE-MsgGUID: pVo962/CTmOwIowi7PFdnw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="220516225" Received: from yilunxu-optiplex-7050.sh.intel.com ([10.239.159.165]) by fmviesa006.fm.intel.com with ESMTP; 27 Mar 2026 09:23:18 -0700 From: Xu Yilun To: linux-coco@lists.linux.dev, linux-pci@vger.kernel.org, dan.j.williams@intel.com, x86@kernel.org Cc: chao.gao@intel.com, dave.jiang@intel.com, baolu.lu@linux.intel.com, yilun.xu@linux.intel.com, yilun.xu@intel.com, zhenzhong.duan@intel.com, kvm@vger.kernel.org, rick.p.edgecombe@intel.com, dave.hansen@linux.intel.com, kas@kernel.org, xiaoyao.li@intel.com, vishal.l.verma@intel.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 13/31] x86/virt/tdx: Extend tdx_clflush_page() to handle compound pages Date: Sat, 28 Mar 2026 00:01:14 +0800 Message-Id: <20260327160132.2946114-14-yilun.xu@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260327160132.2946114-1-yilun.xu@linux.intel.com> References: <20260327160132.2946114-1-yilun.xu@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use page_size() to correctly flush the range that a compound page covers. Recall that TDX Module requires VMM to provide IOMMU metadata known as IOMMU_MT, which contains some multi-order pages. Like all other metadata, TDX Module will convert these multi-order pages to private so VMM should flush the shared cache beforehand. Extend tdx_clflush_page() to handle this case. The usage of tdx_clflush_page() for IOMMU_MT will be introduced later, but the change stands as a valid improvement on its own. Signed-off-by: Xu Yilun --- arch/x86/virt/vmx/tdx/tdx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index 0e1ad793e648..e7d47fbe7057 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -1510,7 +1510,7 @@ static int init_tdmrs(struct tdmr_info_list *tdmr_lis= t) */ static void tdx_clflush_page(struct page *page) { - clflush_cache_range(page_to_virt(page), PAGE_SIZE); + clflush_cache_range(page_to_virt(page), page_size(page)); } =20 static void tdx_clflush_page_array(struct tdx_page_array *array) --=20 2.25.1