From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99A3DC2D0A3 for ; Sat, 24 Oct 2020 08:41:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5854122280 for ; Sat, 24 Oct 2020 08:41:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="f0NFPSQ4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760087AbgJXIlL (ORCPT ); Sat, 24 Oct 2020 04:41:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56796 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756126AbgJXIlK (ORCPT ); Sat, 24 Oct 2020 04:41:10 -0400 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E0F0C0613CE; Sat, 24 Oct 2020 01:41:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=Mime-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=Glo513Rt1TutAD9+Db21F6sf59k7lWOgV38lbr8hHkQ=; b=f0NFPSQ45gFkBqfEsFSaLXtzfr Uo+HMLyjXi0iMps8y60aumY1VDY4ISIhkMCV18edUzxwRyeUdsnjKeOlBfzeB1qR5xdE91Xd0Jzax 2P5f5vYr/skTCZ3b4yVFJ4pvHzg62PqCKvqqMpOdPeDtlR8HFJauxGBd779JIR9YZ/AkiEAZ2H6fE X3nAbXhmIHeoXflpnaHS0mS6yC4JD7ZA1ZnU9B+Co6ePmmHvuS1p0GxE+z4XLA5S+NB56OlDNAgGz i4qonaJmeYchZzEJK8lR7JuTeSERiY7cum1cCst4a5k6nybEam2AzHEw83uYxgTj3MM9a0dOODJWH Wy0s/ypw==; Received: from [54.239.6.185] (helo=freeip.amazon.com) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kWF6n-0003tF-9f; Sat, 24 Oct 2020 08:41:05 +0000 Message-ID: Subject: Re: [PATCH v2 8/8] x86/ioapic: Generate RTE directly from parent irqchip's MSI message From: David Woodhouse To: Thomas Gleixner , x86@kernel.org Cc: kvm , Paolo Bonzini , linux-kernel , linux-hyperv@vger.kernel.org, Dexuan Cui Date: Sat, 24 Oct 2020 09:41:02 +0100 In-Reply-To: References: <87y2jy542v.fsf@nanos.tec.linutronix.de> <87d01863a2.fsf@nanos.tec.linutronix.de> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-HfD9PLau02EfLv4aVH5c" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org --=-HfD9PLau02EfLv4aVH5c Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, 2020-10-24 at 09:26 +0100, David Woodhouse wrote: >=20 > And now I wish it was just a simple shift instead of an unholy maze of > overlapping unions of bitfields. But I'll make more coffee and stare at > it harder... Hah, it really *was* unions of the bitfields. This boots... diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.= h index c65e89bedc93..3e14adba34ba 100644 --- a/arch/x86/include/asm/io_apic.h +++ b/arch/x86/include/asm/io_apic.h @@ -65,6 +65,8 @@ union IO_APIC_reg_03 { }; =20 struct IO_APIC_route_entry { + union { + struct { u64 vector : 8, delivery_mode : 3, dest_mode_logical : 1, @@ -77,7 +79,8 @@ struct IO_APIC_route_entry { reserved_1 : 17, virt_destid_8_14 : 7, destid_0_7 : 8; - + }; + struct { u64 ir_shared_0 : 8, ir_zero : 3, ir_index_15 : 1, @@ -85,6 +88,8 @@ struct IO_APIC_route_entry { ir_reserved_0 : 31, ir_format : 1, ir_index_0_14 : 15; + }; + }; } __attribute__ ((packed)); =20 struct irq_alloc_info; diff --git a/arch/x86/include/asm/msi.h b/arch/x86/include/asm/msi.h index 8cf82d134b78..ef9dfaa4603f 100644 --- a/arch/x86/include/asm/msi.h +++ b/arch/x86/include/asm/msi.h @@ -25,6 +25,7 @@ typedef struct x86_msi_data { =20 typedef struct x86_msi_addr_lo { union { + struct { u32 reserved_0 : 2, dest_mode_logical : 1, redirect_hint : 1, @@ -32,13 +33,15 @@ typedef struct x86_msi_addr_lo { virt_destid_8_14 : 7, destid_0_7 : 8, base_address : 12; - + }; + struct { u32 dmar_reserved_0 : 2, dmar_index_15 : 1, dmar_subhandle_valid : 1, dmar_format : 1, dmar_index_0_14 : 15, dmar_base_address : 12; + }; }; } __attribute__ ((packed)) arch_msi_msg_addr_lo_t; #define arch_msi_msg_addr_lo x86_msi_addr_lo --=-HfD9PLau02EfLv4aVH5c Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCECow ggUcMIIEBKADAgECAhEA4rtJSHkq7AnpxKUY8ZlYZjANBgkqhkiG9w0BAQsFADCBlzELMAkGA1UE BhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgG A1UEChMRQ09NT0RPIENBIExpbWl0ZWQxPTA7BgNVBAMTNENPTU9ETyBSU0EgQ2xpZW50IEF1dGhl bnRpY2F0aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0EwHhcNMTkwMTAyMDAwMDAwWhcNMjIwMTAxMjM1 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