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Tue, 25 Jun 2024 12:03:30 +0000 From: TaiseiIto To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, mst@redhat.com, TaiseiIto Subject: [PATCH] hw/intc/ioapic: Delete a wrong IRQ redirection on I/O APIC Date: Tue, 25 Jun 2024 12:03:09 +0000 Message-ID: X-Mailer: git-send-email 2.34.1 X-TMN: [ey1RBDlVP0C/Jzvod7dp2FgqSerLf5Jt] X-ClientProxiedBy: TY2PR06CA0012.apcprd06.prod.outlook.com (2603:1096:404:42::24) To TY0PR0101MB4285.apcprd01.prod.exchangelabs.com (2603:1096:400:1b0::11) X-Microsoft-Original-Message-ID: <20240625120309.1816-1-taisei1212@outlook.jp> MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: TY0PR0101MB4285:EE_|SEZPR01MB5509:EE_ X-MS-Office365-Filtering-Correlation-Id: a0402720-8e58-403d-c8d9-08dc950ed3fa X-Microsoft-Antispam: BCL:0; ARA:14566002|461199025|3412199022|440099025|1710799023; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: sct-15-20-4755-11-msonline-outlook-d8e84.templateTenant X-MS-Exchange-CrossTenant-Network-Message-Id: a0402720-8e58-403d-c8d9-08dc950ed3fa X-MS-Exchange-CrossTenant-AuthSource: TY0PR0101MB4285.apcprd01.prod.exchangelabs.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Jun 2024 12:03:30.1265 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: SEZPR01MB5509 Received-SPF: pass client-ip=40.92.107.43; envelope-from=taisei1212@outlook.jp; helo=APC01-TYZ-obe.outbound.protection.outlook.com X-Spam_score_int: -4 X-Spam_score: -0.5 X-Spam_bar: / X-Spam_report: (-0.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_BL_SPAMCOP_NET=1.347, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Before this commit, interruptions from i8254 which should be sent to IRQ0 were sent to IRQ2. After this commit, these are correctly sent to IRQ0. When I had an HPET timer generate interruptions once per second to test an HPET driver in my operating system on QEMU, I observed more frequent interruptions than I configured on the HPET timer. I investigated the cause and found that not only interruptions from HPET but also interruptions from i8254 were sent to IRQ2 because of a redirection from IRQ0 to IRQ2. This redirection is added in hw/apic.c at commit 16b29ae1807b024bd5052301550f5d47dae958a2 but this redirection caused wrong interruptions. So I deleted the redirection. Finally, I confirmed there is no problem on 'make check' results and that interruptions from i8254 and interruptions from HPET are correclty sent to IRQ0 and IRQ2 respectively. Signed-off-by: TaiseiIto --- hw/intc/ioapic.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c index 716ffc8bbb..6b630b45ca 100644 --- a/hw/intc/ioapic.c +++ b/hw/intc/ioapic.c @@ -154,15 +154,8 @@ static void ioapic_set_irq(void *opaque, int vector, int level) { IOAPICCommonState *s = opaque; - /* ISA IRQs map to GSI 1-1 except for IRQ0 which maps - * to GSI 2. GSI maps to ioapic 1-1. This is not - * the cleanest way of doing it but it should work. */ - trace_ioapic_set_irq(vector, level); ioapic_stat_update_irq(s, vector, level); - if (vector == 0) { - vector = 2; - } if (vector < IOAPIC_NUM_PINS) { uint32_t mask = 1 << vector; uint64_t entry = s->ioredtbl[vector];