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Fri, 13 Mar 2026 10:44:08 +0000 Message-ID: Date: Fri, 13 Mar 2026 10:44:06 +0000 User-Agent: Mozilla Thunderbird Cc: Andrew Cooper , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, xen-devel@lists.xenproject.org Subject: Re: [PATCH] hvc/xen: Check console connection flag To: Jiri Slaby , Jason Andryuk , Greg Kroah-Hartman , Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko References: <20260312173845.47235-1-jason.andryuk@amd.com> <8e5974b1-da6d-4718-9140-1f943cdd2404@kernel.org> Content-Language: en-GB From: Andrew Cooper In-Reply-To: <8e5974b1-da6d-4718-9140-1f943cdd2404@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: LO2P265CA0079.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:8::19) To CH8PR03MB8275.namprd03.prod.outlook.com (2603:10b6:610:2b9::7) X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH8PR03MB8275:EE_|DM6PR03MB5372:EE_ X-MS-Office365-Filtering-Correlation-Id: e8e8a078-9104-4d73-47f4-08de80ed7498 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7416014|56012099003|18002099003|22082099003; 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>>       XENCONS_RING_IDX in_cons, in_prod; >>       XENCONS_RING_IDX out_cons, out_prod; >> +/* >> + * Flag values signaling from backend to frontend whether the >> console is >> + * connected.  i.e. Whether it will be serviced and emptied. >> + * >> + * The flag starts as disconnected. >> + */ >> +#define XENCONSOLE_DISCONNECTED 1 >> +/* >> + * The flag is set to connected when the backend connects and the >> console >> + * will be serviced. >> + */ >> +#define XENCONSOLE_CONNECTED    0 > > This all should be an enum. And you can document it using kernel-doc > properly then. > >> +    uint8_t connection; > > And type check as well. This is a non-Linux header file being re-sync'd with it's original source. It describes an ABI between VMs, where things like enum are forbidden. ~Andrew