From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Woodhouse Subject: Re: [PATCH] xen/mm: Alter is_iomem_page() to use mfn_t Date: Thu, 09 Feb 2017 11:10:16 +0000 Message-ID: <1486638616.5110.210.camel@infradead.org> References: <1486389313-8326-1-git-send-email-andrew.cooper3@citrix.com> <589895B70200007800136F0F@prv-mh.provo.novell.com> <1486392536.5110.80.camel@infradead.org> <5898A67C0200007800136FA0@prv-mh.provo.novell.com> <589B5DF20200007800137E45@prv-mh.provo.novell.com> <20170209082738.GA15352@localhost.localdomain> <589C3CBE020000780013814A@prv-mh.provo.novell.com> <20170209035424.GB64200@skl-2s3.sh.intel.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0929387114748863393==" Return-path: In-Reply-To: <20170209035424.GB64200@skl-2s3.sh.intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Chao Gao , Jan Beulich Cc: Kevin Tian , Stefano Stabellini , George Dunlap , Andrew Cooper , Tim Deegan , Xen-devel , Julien Grall , Jun Nakajima List-Id: xen-devel@lists.xenproject.org --===============0929387114748863393== Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-lWZuPAmR11+aorgOFWDU" --=-lWZuPAmR11+aorgOFWDU Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, 2017-02-09 at 11:54 +0800, Chao Gao wrote: >=20 > Jan is right. When the assertion fails, the value of gfn is 0xfee00. >=20 > Do you mean that is_iomem_page() is equal to direct_mmio except some > corner cases such as APIC access MFN and INVALID_MFN( any others? ) ? That was the hypothesis, and it seems reasonable. But I also note you're only testing that hypothesis in the direct_mmio=3D=3D1 case. You don't test the hypothesis that if direct_mmio=3D=3D0, then so is is_iomem_page(). --=-lWZuPAmR11+aorgOFWDU Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCDzUw ggSvMIIDl6ADAgECAhEA4CPLFRKDU4mtYW56VGdrITANBgkqhkiG9w0BAQsFADBvMQswCQYDVQQG EwJTRTEUMBIGA1UEChMLQWRkVHJ1c3QgQUIxJjAkBgNVBAsTHUFkZFRydXN0IEV4dGVybmFsIFRU UCBOZXR3b3JrMSIwIAYDVQQDExlBZGRUcnVzdCBFeHRlcm5hbCBDQSBSb290MB4XDTE0MTIyMjAw MDAwMFoXDTIwMDUzMDEwNDgzOFowgZsxCzAJBgNVBAYTAkdCMRswGQYDVQQIExJHcmVhdGVyIE1h bmNoZXN0ZXIxEDAOBgNVBAcTB1NhbGZvcmQxGjAYBgNVBAoTEUNPTU9ETyBDQSBMaW1pdGVkMUEw PwYDVQQDEzhDT01PRE8gU0hBLTI1NiBDbGllbnQgQXV0aGVudGljYXRpb24gYW5kIFNlY3VyZSBF bWFpbCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAImxDdp6UxlOcFIdvFamBia3 uEngludRq/HwWhNJFaO0jBtgvHpRQqd5jKQi3xdhTpHVdiMKFNNKAn+2HQmAbqUEPdm6uxb+oYep LkNSQxZ8rzJQyKZPWukI2M+TJZx7iOgwZOak+FaA/SokFDMXmaxE5WmLo0YGS8Iz1OlAnwawsayT QLm1CJM6nCpToxDbPSBhPFUDjtlOdiUCISn6o3xxdk/u4V+B6ftUgNvDezVSt4TeIj0sMC0xf1m9 UjewM2ktQ+v61qXxl3dnUYzZ7ifrvKUHOHaMpKk4/9+M9QOsSb7K93OZOg8yq5yVOhM9DkY6V3Rh UL7GQD/L5OKfoiECAwEAAaOCARcwggETMB8GA1UdIwQYMBaAFK29mHo0tCb3+sQmVO8DveAky1Qa MB0GA1UdDgQWBBSSYWuC4aKgqk/sZ/HCo/e0gADB7DAOBgNVHQ8BAf8EBAMCAYYwEgYDVR0TAQH/ BAgwBgEB/wIBADAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwQwEQYDVR0gBAowCDAGBgRV HSAAMEQGA1UdHwQ9MDswOaA3oDWGM2h0dHA6Ly9jcmwudXNlcnRydXN0LmNvbS9BZGRUcnVzdEV4 dGVybmFsQ0FSb290LmNybDA1BggrBgEFBQcBAQQpMCcwJQYIKwYBBQUHMAGGGWh0dHA6Ly9vY3Nw LnVzZXJ0cnVzdC5jb20wDQYJKoZIhvcNAQELBQADggEBABsqbqxVwTqriMXY7c1V86prYSvACRAj mQ/FZmpvsfW0tXdeDwJhAN99Bf4Ss6SAgAD8+x1banICCkG8BbrBWNUmwurVTYT7/oKYz1gb4yJj nFL4uwU2q31Ypd6rO2Pl2tVz7+zg+3vio//wQiOcyraNTT7kSxgDsqgt1Ni7QkuQaYUQ26Y3NOh7 4AEQpZzKOsefT4g0bopl0BqKu6ncyso20fT8wmQpNa/WsadxEdIDQ7GPPprsnjJT9HaSyoY0B7ks yuYcStiZDcGG4pCS+1pCaiMhEOllx/XVu37qjIUgAmLq0ToHLFnFmTPyOInltukWeh95FPZKEBom +nyK+5swggU9MIIEJaADAgECAhBqC1BYlVMtBFBN4igR/howMA0GCSqGSIb3DQEBCwUAMIGbMQsw CQYDVQQGEwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3Jk MRowGAYDVQQKExFDT01PRE8gQ0EgTGltaXRlZDFBMD8GA1UEAxM4Q09NT0RPIFNIQS0yNTYgQ2xp ZW50IEF1dGhlbnRpY2F0aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0EwHhcNMTYxMjIwMDAwMDAwWhcN MTcxMjIwMjM1OTU5WjAkMSIwIAYJKoZIhvcNAQkBFhNkd213MkBpbmZyYWRlYWQub3JnMIIBIjAN BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwbTrFaiGdvN2pThnR9q+4eaXB2wQZQNqhter5ZrJ pPO47e87bZ+f1tmYoh6+rB90G/XN24NErPRfvU4zVzNT9pCtCzSSVnBlZQBpaEYMKhcXo5PGKNsm An8BoGwNXjlxwbBNRaNO+ky0wNCaMNd1JLxEuvqg9J7rrcpHhWmnpXD5IKa8gv9GyVAJgOpiBOts p91sShc2kHvWJ5waPEWPCHDH9J+twGGKqKIIU7fdbURLUgUL1wlDSAHf/lgIAVCSj2H2HpoGqHpy HgOAClX9iRSLNa0Znj8HTaqfOwxXevsz1KkLFY+Ahm426GIEqdfkK2iT6Hhgc7tjNO3f8i5ALQID AQABo4IB8TCCAe0wHwYDVR0jBBgwFoAUkmFrguGioKpP7GfxwqP3tIAAwewwHQYDVR0OBBYEFILE dmHLtK6oxmFJZvBhTQhvqrS0MA4GA1UdDwEB/wQEAwIFoDAMBgNVHRMBAf8EAjAAMCAGA1UdJQQZ MBcGCCsGAQUFBwMEBgsrBgEEAbIxAQMFAjARBglghkgBhvhCAQEEBAMCBSAwRgYDVR0gBD8wPTA7 BgwrBgEEAbIxAQIBAQEwKzApBggrBgEFBQcCARYdaHR0cHM6Ly9zZWN1cmUuY29tb2RvLm5ldC9D UFMwXQYDVR0fBFYwVDBSoFCgToZMaHR0cDovL2NybC5jb21vZG9jYS5jb20vQ09NT0RPU0hBMjU2 Q2xpZW50QXV0aGVudGljYXRpb25hbmRTZWN1cmVFbWFpbENBLmNybDCBkAYIKwYBBQUHAQEEgYMw gYAwWAYIKwYBBQUHMAKGTGh0dHA6Ly9jcnQuY29tb2RvY2EuY29tL0NPTU9ET1NIQTI1NkNsaWVu dEF1dGhlbnRpY2F0aW9uYW5kU2VjdXJlRW1haWxDQS5jcnQwJAYIKwYBBQUHMAGGGGh0dHA6Ly9v Y3NwLmNvbW9kb2NhLmNvbTAeBgNVHREEFzAVgRNkd213MkBpbmZyYWRlYWQub3JnMA0GCSqGSIb3 DQEBCwUAA4IBAQA+AfvNhFwtapF5Lzjapgul3zYuEnMfR538Ya1vhP8wuOkcoJeT2gEFXzVO2WUu eWM0g0/DumnRB53htV/Qq/+vsL0i6a2+iOO7kHi5O7bZkgbdNv0t2lzonDUHi6LTa7NUj+tv+j6y hW+iNquC3ACP1dIZH8gJmicHblW63qRgp6wxhn315MLBeavi3uiSag2eeKFePiTIwJjN2UYq6kWg PL5G/Ycf9x/xN1XBTfJiURc0FsXhrA98VMWnt52C5Lo4txhGjzTI+IZg40b3YDs6E7mTYb5KKmbc QZA9priOFDdj1z5W9BdWhU6I/D0P9y8Z4Tr6+ZscMUVD0RqWy2LeMIIFPTCCBCWgAwIBAgIQagtQ WJVTLQRQTeIoEf4aMDANBgkqhkiG9w0BAQsFADCBmzELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdy ZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExp bWl0ZWQxQTA/BgNVBAMTOENPTU9ETyBTSEEtMjU2IENsaWVudCBBdXRoZW50aWNhdGlvbiBhbmQg U2VjdXJlIEVtYWlsIENBMB4XDTE2MTIyMDAwMDAwMFoXDTE3MTIyMDIzNTk1OVowJDEiMCAGCSqG SIb3DQEJARYTZHdtdzJAaW5mcmFkZWFkLm9yZzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC ggEBAMG06xWohnbzdqU4Z0favuHmlwdsEGUDaobXq+WayaTzuO3vO22fn9bZmKIevqwfdBv1zduD RKz0X71OM1czU/aQrQs0klZwZWUAaWhGDCoXF6OTxijbJgJ/AaBsDV45ccGwTUWjTvpMtMDQmjDX dSS8RLr6oPSe663KR4Vpp6Vw+SCmvIL/RslQCYDqYgTrbKfdbEoXNpB71iecGjxFjwhwx/SfrcBh iqiiCFO33W1ES1IFC9cJQ0gB3/5YCAFQko9h9h6aBqh6ch4DgApV/YkUizWtGZ4/B02qnzsMV3r7 M9SpCxWPgIZuNuhiBKnX5Ctok+h4YHO7YzTt3/IuQC0CAwEAAaOCAfEwggHtMB8GA1UdIwQYMBaA FJJha4LhoqCqT+xn8cKj97SAAMHsMB0GA1UdDgQWBBSCxHZhy7SuqMZhSWbwYU0Ib6q0tDAOBgNV HQ8BAf8EBAMCBaAwDAYDVR0TAQH/BAIwADAgBgNVHSUEGTAXBggrBgEFBQcDBAYLKwYBBAGyMQED BQIwEQYJYIZIAYb4QgEBBAQDAgUgMEYGA1UdIAQ/MD0wOwYMKwYBBAGyMQECAQEBMCswKQYIKwYB BQUHAgEWHWh0dHBzOi8vc2VjdXJlLmNvbW9kby5uZXQvQ1BTMF0GA1UdHwRWMFQwUqBQoE6GTGh0 dHA6Ly9jcmwuY29tb2RvY2EuY29tL0NPTU9ET1NIQTI1NkNsaWVudEF1dGhlbnRpY2F0aW9uYW5k U2VjdXJlRW1haWxDQS5jcmwwgZAGCCsGAQUFBwEBBIGDMIGAMFgGCCsGAQUFBzAChkxodHRwOi8v Y3J0LmNvbW9kb2NhLmNvbS9DT01PRE9TSEEyNTZDbGllbnRBdXRoZW50aWNhdGlvbmFuZFNlY3Vy ZUVtYWlsQ0EuY3J0MCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5jb21vZG9jYS5jb20wHgYDVR0R BBcwFYETZHdtdzJAaW5mcmFkZWFkLm9yZzANBgkqhkiG9w0BAQsFAAOCAQEAPgH7zYRcLWqReS84 2qYLpd82LhJzH0ed/GGtb4T/MLjpHKCXk9oBBV81TtllLnljNINPw7pp0Qed4bVf0Kv/r7C9Iumt vojju5B4uTu22ZIG3Tb9Ldpc6Jw1B4ui02uzVI/rb/o+soVvojargtwAj9XSGR/ICZonB25Vut6k YKesMYZ99eTCwXmr4t7okmoNnnihXj4kyMCYzdlGKupFoDy+Rv2HH/cf8TdVwU3yYlEXNBbF4awP fFTFp7edguS6OLcYRo80yPiGYONG92A7OhO5k2G+Sipm3EGQPaa4jhQ3Y9c+VvQXVoVOiPw9D/cv GeE6+vmbHDFFQ9Ealsti3jGCA9MwggPPAgEBMIGwMIGbMQswCQYDVQQGEwJHQjEbMBkGA1UECBMS R3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQKExFDT01PRE8gQ0Eg TGltaXRlZDFBMD8GA1UEAxM4Q09NT0RPIFNIQS0yNTYgQ2xpZW50IEF1dGhlbnRpY2F0aW9uIGFu ZCBTZWN1cmUgRW1haWwgQ0ECEGoLUFiVUy0EUE3iKBH+GjAwDQYJYIZIAWUDBAIBBQCgggHzMBgG CSqGSIb3DQEJAzELBgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTE3MDIwOTExMTAxNlowLwYJ KoZIhvcNAQkEMSIEIJFPS26/WoBRRP/OP+N78967kk5h4KtSq7uFi052zYUqMIHBBgkrBgEEAYI3 EAQxgbMwgbAwgZsxCzAJBgNVBAYTAkdCMRswGQYDVQQIExJHcmVhdGVyIE1hbmNoZXN0ZXIxEDAO BgNVBAcTB1NhbGZvcmQxGjAYBgNVBAoTEUNPTU9ETyBDQSBMaW1pdGVkMUEwPwYDVQQDEzhDT01P RE8gU0hBLTI1NiBDbGllbnQgQXV0aGVudGljYXRpb24gYW5kIFNlY3VyZSBFbWFpbCBDQQIQagtQ WJVTLQRQTeIoEf4aMDCBwwYLKoZIhvcNAQkQAgsxgbOggbAwgZsxCzAJBgNVBAYTAkdCMRswGQYD VQQIExJHcmVhdGVyIE1hbmNoZXN0ZXIxEDAOBgNVBAcTB1NhbGZvcmQxGjAYBgNVBAoTEUNPTU9E TyBDQSBMaW1pdGVkMUEwPwYDVQQDEzhDT01PRE8gU0hBLTI1NiBDbGllbnQgQXV0aGVudGljYXRp b24gYW5kIFNlY3VyZSBFbWFpbCBDQQIQagtQWJVTLQRQTeIoEf4aMDANBgkqhkiG9w0BAQEFAASC AQCYSQMri0owF0+iND3nar5qE/w+63K3QsFwlKj2/i83C89kFSCmUXSDomfqko644F3cQWwvkL2W pFC59DHxeXU5KUJU0mlRNQ8IU4rPoSWR58HUJ7wNYavKnrf6z8y1R0N3XLB9MZJSZPCbR/plgUQ5 OPFHIpCvlTJqnkO4f5JpTtCFSYCqM5ndioZeaQsghzDoancjlwxUepttodBGTScuvRK6Wx7SHMNV ZUPrNtTF9hzJbx+XhX1d1D9J+Nrrqff++YSjyUiHy+/4yLP0/ICU1hKxZAQdRmFtzkzhskTVNghz kw7mNNecPRN6o1EELsCioiYmVhYqikZP+uRI1WWAAAAAAAAA --=-lWZuPAmR11+aorgOFWDU-- --===============0929387114748863393== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5v cmcveGVuLWRldmVsCg== --===============0929387114748863393==--