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bh=ILnfP8RABLb+q0Xa/Rg4y+cxoUVc0GUqnq9+CRWXsBA=; b=JsRwxDI5C4MJI7f3+hvgtsdfxg6QBhpQgLXmmB4btuoRnRowUpoqnOrrabjlb2QLdQOyuHzjiIOVQlxdO9ppvtBWmEk+8rk/7iw7wNNo2aGhJ1qbGFyHypmnE8eynhpmjrUJFIwyplun8heUS3OTiMqo9yHAmJh+hsCmeRlijBM= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Date: Thu, 11 Sep 2025 17:36:08 +0200 Message-ID: CC: Anthony PERARD , Subject: Re: [PATCH v2 2/2] libacpi: Remove CPU hotplug and GPE handling from PVH DSDTs From: Alejandro Vallejo To: Jan Beulich X-Mailer: aerc 0.20.1 References: <20250911115308.16580-1-alejandro.garciavallejo@amd.com> <20250911115308.16580-3-alejandro.garciavallejo@amd.com> In-Reply-To: X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A103:EE_|IA0PPF52B16157D:EE_ X-MS-Office365-Filtering-Correlation-Id: 1e5acaa8-ab95-48e9-e22f-08ddf148ef17 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|376014|1800799024|7053199007; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Sep 2025 15:36:10.7312 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1e5acaa8-ab95-48e9-e22f-08ddf148ef17 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A103.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PPF52B16157D On Thu Sep 11, 2025 at 5:07 PM CEST, Jan Beulich wrote: > On 11.09.2025 13:53, Alejandro Vallejo wrote: >> PVH guests have no DM, so this causes the guest to fetch the online CPU >> bitmap from an unbacked 0xaf00 PIO port when executing the GPE handler. >>=20 >> Seeing how ACPI CPU hotplug is the only event delivered via GPE, remove >> the GPE handler in addition to anything ACPI CPU hotplug related. >>=20 >> This shrinks PVH's DSDT substantially and prevents spuriously executing >> a large amount of AML with no purpose at all. >>=20 >> Signed-off-by: Alejandro Vallejo > > Reviewed-by: Jan Beulich Thanks > >> --- >> v2: >> * Adjusted commit message >> * All other tags except S-by moved to patch 1. > > This will want backporting; I expect finding a suitable commit for a Fixe= s: > tag is somewhat difficult. > > Jan I'd say it's the patch that needlessly enabled GPE handling on PVH. Fixes: 062975dc9441("acpi: PVH guests need _E02 method") Cheers, Alejandro