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Mon, 9 Jan 2023 07:13:50 +0000 From: Souradeep Chakrabarti To: "freebsd-arm@FreeBSD.org" , Li-Wen Hsu , Warner Losh , "freebsd-hackers@FreeBSD.org" CC: Wei Hu Subject: RE: MSI CPU affinity for ARM64 Thread-Topic: MSI CPU affinity for ARM64 Thread-Index: Adkio8F3khe3N5kdTvWiOLlk332lhABVhZLg Date: Mon, 9 Jan 2023 07:13:50 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ActionId=db4a32ba-f893-40d3-8ebf-516da4c3f48c;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ContentBits=0;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Enabled=true;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Method=Standard;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Name=Internal;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SetDate=2023-01-07T14:23:14Z;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SiteId=72f988bf-86f1-41af-91ab-2d7cd011db47; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: PSAP153MB0536:EE_|PSAP153MB0422:EE_ x-ms-office365-filtering-correlation-id: 61d64e9d-209b-45f2-3264-08daf2110ed1 x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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WHITELIST_SPF_DKIM(-3.00)[microsoft.com:d:+,microsoft.com:s:+]; DWL_DNSWL_MED(-2.00)[microsoft.com:dkim]; ARC_ALLOW(-1.00)[microsoft.com:s=arcselector9901:i=1]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; DMARC_POLICY_ALLOW(-0.50)[microsoft.com,reject]; R_SPF_ALLOW(-0.20)[+ip4:52.100.0.0/14]; R_DKIM_ALLOW(-0.20)[microsoft.com:s=selector2]; MIME_GOOD(-0.10)[text/plain]; MLMMJ_DEST(0.00)[freebsd-arm@FreeBSD.org,freebsd-hackers@freebsd.org]; FROM_EQ_ENVFROM(0.00)[]; ASN(0.00)[asn:8075, ipnet:52.96.0.0/12, country:US]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[microsoft.com:+]; FROM_HAS_DN(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[52.101.128.26:from]; TO_DN_SOME(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; RCPT_COUNT_FIVE(0.00)[5]; TO_DN_EQ_ADDR_SOME(0.00)[] X-Rspamd-Queue-Id: 4Nr4tW4GsXz4Kxy X-Spamd-Bar: --------- X-ThisMailContainsUnwantedMimeParts: N > -----Original Message----- > From: Souradeep Chakrabarti > Sent: Saturday, January 7, 2023 8:24 PM > To: freebsd-arm@FreeBSD.org; Li-Wen Hsu > Cc: Wei Hu > Subject: MSI CPU affinity for ARM64 >=20 > Hi, > I am trying to understand how we can find the target CPU for MSI in ARM6= 4. > When looking at gic_v3 code I can see following: > gic_v3_bind_intr( ) does mapping to next incremental CPU but gic_v3_dist_= init( ) > does setup boot cpu as the target CPU for MSI interrupts. >=20 > If I need to find the CPU bound with a particular MSI interrupt, how we c= an do that? >=20 > Also is there a way get the the CPU id from the CPU affinity in ARM? >=20 > Thanks & Regards, > Souradeep [Souradeep]=20 Adding FreeBSD Hackers on the mail thread.