From nobody Sat Feb 7 15:21:41 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) (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 0165B29DB7E for ; Tue, 29 Apr 2025 08:57:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745917081; cv=none; b=Cx2DRqsbO5YY06MCe5W6/sbufvTYiUgzZ/CrWO9f5Nao664gvt/w3ROUQ+LwBRc/uHzqgFRv/Zb5NlBRgP72P3HMlBWaan4wJTwIMHhkBfdiqf+5BJfldGHwVbzIO5CTu0DqoJ0Mbe1MhUCGuriB47CCz/F7NKFCbBuPraUX8/U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745917081; c=relaxed/simple; bh=XZ7JYuhvD6ePls1dpFIbgKEYUhz15NUdlYgRpodk1vY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=lzAmOxAhXZ35FyKLp4BgQZk3G1q5eCloEhGxgyCO1Jnb9BOxGnTA6MrKXW/fqP/4FB7EYfC/zYHhba1rsKDpImBuUrn62gzJkfAEqfeNDoVNQ2I/zKfW13WpwR7blKyswRgzFhlOmRZjSvaI7XQ/li2ynh1nr7EB8kZ9EJcWakY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=EVma3bfx; arc=none smtp.client-ip=192.198.163.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="EVma3bfx" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1745917079; x=1777453079; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=XZ7JYuhvD6ePls1dpFIbgKEYUhz15NUdlYgRpodk1vY=; b=EVma3bfxcU8suxE+rCNisSaXFIWZU9o4DSjGwg5/QuNRpaYQaQThWJR3 4Q9kSKSwNxAfOA7s7kcTYNUdSF1H3BXmovCl8vd7j/R5iMyAyQxv2ymn8 aZy96cVNPvWkPbd17kVosXA454+Xd3N6w2iPrfk50lhOrLY2WlWEU7gbW +f2DxdNFoIoxbDMDK5sa1sV2RCH1KcQIvdL3UKAqU0GPafNIi0cx6Av2S 8xhjoBlKxUrtNqfBIvPtrDVHJZ3PHs9zGFkr/YDY2wpvFiuvV5duzwbQ4 NbCzvLa5pnoUsF84rlwZBXqzZ0oU3xctPgJ4+sjwT+CnSARP7ASMtN0YS Q==; X-CSE-ConnectionGUID: HOyeBCqjTMOseG2DblOo3g== X-CSE-MsgGUID: dZ8wxwl2RIK31PW7UybUqw== X-IronPort-AV: E=McAfee;i="6700,10204,11417"; a="72907642" X-IronPort-AV: E=Sophos;i="6.15,248,1739865600"; d="scan'208";a="72907642" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Apr 2025 01:57:58 -0700 X-CSE-ConnectionGUID: nAEbRkOvT/iLlXFgVaaneg== X-CSE-MsgGUID: T8W9ExEhSj6Os6Uan4KV3Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,248,1739865600"; d="scan'208";a="164865189" Received: from unknown (HELO CannotLeaveINTEL.bj.intel.com) ([10.238.153.146]) by fmviesa001.fm.intel.com with ESMTP; 29 Apr 2025 01:57:56 -0700 From: Jun Miao To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com Cc: x86@kernel.org, linux-kernel@vger.kernel.org, jun.miao@intel.com, fan.du@intel.com Subject: [PATCH] swiotlb: add a SWIOTLB_ANY flag to lift restricted low memory for encryption Date: Tue, 29 Apr 2025 12:53:30 -0400 Message-ID: <20250429165330.2644155-1-jun.miao@intel.com> X-Mailer: git-send-email 2.43.0 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" TDX guest wants to allocate a swiotlb buffer that is not restricted to low memory for the trusted hypervisor scheme. So that allow to pick a location everywhere for hypervisors with guest memory encryption in swiotlb_memblock_alloc() interface by adding a new flag. Signed-off-by: Jun Miao --- arch/x86/kernel/pci-dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 6267363e0189..73b9320c4a7d 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -61,7 +61,7 @@ static void __init pci_swiotlb_detect(void) */ if (cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) { x86_swiotlb_enable =3D true; - x86_swiotlb_flags |=3D SWIOTLB_FORCE; + x86_swiotlb_flags |=3D SWIOTLB_ANY | SWIOTLB_FORCE; } } #else --=20 2.43.0