From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1])
	by mail.toke.dk (Postfix) with ESMTPS id 9E4419CCB38
	for <xdp-hints@xdp-project.net>; Thu,  8 Dec 2022 05:26:05 +0100 (CET)
Authentication-Results: mail.toke.dk;
	dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Xw8F6uVj
Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by dfw.source.kernel.org (Postfix) with ESMTPS id 55EC761BBE;
	Thu,  8 Dec 2022 04:26:02 +0000 (UTC)
Received: by smtp.kernel.org (Postfix) with ESMTPSA id DCDD2C433D6;
	Thu,  8 Dec 2022 04:26:00 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;
	s=k20201202; t=1670473561;
	bh=pN+wGVc+4cW/yHQxiTF6zQ8V1EauH9TedbOtylafW/0=;
	h=Date:From:To:Cc:Subject:In-Reply-To:References:From;
	b=Xw8F6uVjzfJiIWtPGl//KuiDk0NqwqZpU03E12FkNIQIM3SzfysGj+oWk2nQQFYZV
	 sWmv9wWq1DMiUmgzKcm3ejtvVHpouGCIAxBzobzQAtlBGTVrSsM/lZrr79Pey+N3cY
	 zsS5xKbzVWJLKaBYYQk62CydY3YsD3wtPP2CLQvUyiNvdCoACfVimlCJpj65Is6sTf
	 QSA/NGDPp44x3z+lwnOeDnqKDqbW2N1QLwEfevfBekAIaIsDe5j5lByCq+pZGP8rG5
	 hbUK5ybG3zodeFWaQmH614T+53DQZi0w/nTh3rrbkkDumccNlEfJCUe8di4m5qO+i0
	 zHgkz/wDjwAmg==
Date: Wed, 7 Dec 2022 20:25:59 -0800
From: Jakub Kicinski <kuba@kernel.org>
To: Stanislav Fomichev <sdf@google.com>
Message-ID: <20221207202559.4d507ccf@kernel.org>
In-Reply-To: <20221206024554.3826186-2-sdf@google.com>
References: <20221206024554.3826186-1-sdf@google.com>
	<20221206024554.3826186-2-sdf@google.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Message-ID-Hash: I5OTWBXNSONHZKMQTJ5XOT7VKQDSYNZ2
X-Message-ID-Hash: I5OTWBXNSONHZKMQTJ5XOT7VKQDSYNZ2
X-MailFrom: kuba@kernel.org
X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header
CC: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, haoluo@google.com, jolsa@kernel.org, David Ahern <dsahern@gmail.com>, Willem de Bruijn <willemb@google.com>, Jesper Dangaard Brouer <brouer@redhat.com>, Anatoly Burakov <anatoly.burakov@intel.com>, Alexander Lobakin <alexandr.lobakin@intel.com>, Magnus Karlsson <magnus.karlsson@gmail.com>, Maryam Tahhan <mtahhan@redhat.com>, xdp-hints@xdp-project.net, netdev@vger.kernel.org
X-Mailman-Version: 3.3.7
Precedence: list
Subject: [xdp-hints] Re: [PATCH bpf-next v3 01/12] bpf: Document XDP RX metadata
List-Id: XDP hardware hints design discussion <xdp-hints.xdp-project.net>
Archived-At: <https://lists.xdp-project.net/xdp-hints/20221207202559.4d507ccf@kernel.org/>
List-Archive: <https://lists.xdp-project.net/xdp-hints/>
List-Help: <mailto:xdp-hints-request@xdp-project.net?subject=help>
List-Owner: <mailto:xdp-hints-owner@xdp-project.net>
List-Post: <mailto:xdp-hints@xdp-project.net>
List-Subscribe: <mailto:xdp-hints-join@xdp-project.net>
List-Unsubscribe: <mailto:xdp-hints-leave@xdp-project.net>

On Mon,  5 Dec 2022 18:45:43 -0800 Stanislav Fomichev wrote:
> +- ``bpf_xdp_metadata_rx_timestamp_supported`` returns true/false to
> +  indicate whether the device supports RX timestamps
> +- ``bpf_xdp_metadata_rx_timestamp`` returns packet RX timestamp
> +- ``bpf_xdp_metadata_rx_hash_supported`` returns true/false to
> +  indicate whether the device supports RX hash
> +- ``bpf_xdp_metadata_rx_hash`` returns packet RX hash

Would you mind pointing to the discussion about the separate
_supported() kfuncs? I recall folks had concerns about the function
call overhead, and now we have 2 calls per field? :S