Return-path: Received: from mail.w1.fi ([212.71.239.96]:40783 "EHLO li674-96.members.linode.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751381AbbDIHf2 (ORCPT ); Thu, 9 Apr 2015 03:35:28 -0400 Date: Thu, 9 Apr 2015 10:35:25 +0300 From: Jouni Malinen To: "Peer, Ilan" Cc: Ben Greear , "linux-wireless@vger.kernel.org" Subject: Re: [PATCH 1/2] mac80211_hwsim: Set VHT capabilities only for the 5.2 GHz band Message-ID: <20150409073525.GA21000@w1.fi> (sfid-20150409_093533_890772_95B767FD) References: <1428422722-655-1-git-send-email-ilan.peer@intel.com> <552400F4.5010701@candelatech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: Sender: linux-wireless-owner@vger.kernel.org List-ID: On Wed, Apr 08, 2015 at 06:29:38PM +0000, Peer, Ilan wrote: > According to the 802.11ac amendment: "The IEEE 802.11 VHT STA operates in frequency bands below 6 GHz excluding the 2.4 GHz band", so at least the spec. is clear about it. However, I guess it would be possible to enable VHT for 2.4 as well to enjoy some of benefits, but do you see a reason/use case to enable it also for hwsim? It does not matter what the standard says on VHT in general; there are clearly already products out there that allow some capabilities defined in 802.11ac (mainly, 256-QAM) to be used on the 2.4 GHz band. As far as hwsim is concerned, I'm already using it to verify the negotiation part for this (see ap_vht_on_24ghz test case). The main remaining question for cfg80211/nl80211 is on whether we can come up with a clean way of advertising driver capability for doing this. -- Jouni Malinen PGP id EFC895FA