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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27452C4332F for ; Thu, 14 Dec 2023 14:20:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1573449AbjLNOUp (ORCPT ); Thu, 14 Dec 2023 09:20:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1573448AbjLNOUl (ORCPT ); Thu, 14 Dec 2023 09:20:41 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74ABBCF; Thu, 14 Dec 2023 06:20:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=MIME-Version:Content-Type:References: In-Reply-To:Date:To:From:Subject:Message-ID:Sender:Reply-To:Cc: Content-Transfer-Encoding:Content-ID:Content-Description; bh=tfGsUvVpVImK0Oo30MgkCuIizORYDMLsmANa9k7lbnc=; b=mUxCldX154uCJ/8N1i0Pxkc+uW Pa8TPMMxzEkp/+kgwmIKVJWR/l1puEROcthvi3xaSu1qH86wKjndYLo3gQjsIgAid2u8al4SKRaOa k3BeBbWb/1tEFLEn86YEfA6Fufnl+rrQ5nlgeNXPwrG1FKO2YiQ/pKXGrxZ+t4XTIdrKqTnYAzwkO vAJYKT2PjBvoxd5ua0uzfWL5zCx48UqcE+ztoAR2vKWR1yxycocu2KuiiQIK8tRl7wd9CoQfG2AvM 6heHvOZztET/05cmHsfGXi9PkrOgeQxEkq0Pv3fDrYGOuaRZ0JnpiBBU9dzVt81/0tLuFKptL7tOT /X6Ddkow==; Received: from [2001:8b0:10b:5:d232:2f0e:461d:68c2] (helo=u3832b3a9db3152.ant.amazon.com) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1rDmZf-007g33-B0; Thu, 14 Dec 2023 14:20:28 +0000 Message-ID: Subject: Re: [PATCH v10 16/19] KVM: xen: split up kvm_xen_set_evtchn_fast() From: David Woodhouse To: Paul Durrant , Paolo Bonzini , Jonathan Corbet , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Shuah Khan , kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Date: Thu, 14 Dec 2023 14:20:27 +0000 In-Reply-To: References: <20231204144334.910-1-paul@xen.org> <20231204144334.910-17-paul@xen.org> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/pkcs7-signature"; boundary="=-ptaopca3gfElEaN+o9jr" User-Agent: Evolution 3.44.4-0ubuntu2 MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-ptaopca3gfElEaN+o9jr Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, 2023-12-14 at 14:00 +0000, David Woodhouse wrote: >=20 > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0if (IS_ENABLED(CONFIG_64BIT)= && kvm->arch.xen.long_mode) { > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0struct vcpu_info *vcpu_info =3D gpc->khva; > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0u32 port_word_bit =3D port / 32; >=20 > Shouldn't that one be /64, and the compat one be /32? I think the reason the test failed to spot this for you is because... #define EVTCHN_TEST1 15 #define EVTCHN_TEST2 66 #define EVTCHN_TIMER 13 ... it doesn't actually use any port numbers where the bit# differs for 32-bit vs. 64-bit. If you change EVTCHN_TIMER to something like 50, I bet it'll fail (as it should). --=-ptaopca3gfElEaN+o9jr Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEkQw ggYQMIID+KADAgECAhBNlCwQ1DvglAnFgS06KwZPMA0GCSqGSIb3DQEBDAUAMIGIMQswCQYDVQQG EwJVUzETMBEGA1UECBMKTmV3IEplcnNleTEUMBIGA1UEBxMLSmVyc2V5IENpdHkxHjAcBgNVBAoT FVRoZSBVU0VSVFJVU1QgTmV0d29yazEuMCwGA1UEAxMlVVNFUlRydXN0IFJTQSBDZXJ0aWZpY2F0 aW9uIEF1dGhvcml0eTAeFw0xODExMDIwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMIGWMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRgwFgYD VQQKEw9TZWN0aWdvIExpbWl0ZWQxPjA8BgNVBAMTNVNlY3RpZ28gUlNBIENsaWVudCBBdXRoZW50 aWNhdGlvbiBhbmQgU2VjdXJlIEVtYWlsIENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC AQEAyjztlApB/975Rrno1jvm2pK/KxBOqhq8gr2+JhwpKirSzZxQgT9tlC7zl6hn1fXjSo5MqXUf 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