From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hL75I-00061e-03 for kexec@lists.infradead.org; Mon, 29 Apr 2019 14:16:45 +0000 Date: Mon, 29 Apr 2019 22:16:36 +0800 From: Baoquan He Subject: Re: [PATCH v6 1/2] x86/kexec: Build identity mapping for EFI systab and ACPI tables Message-ID: <20190429141636.GB14140@MiWiFi-R3L-srv> References: <20190424092944.30481-1-bhe@redhat.com> <20190424092944.30481-2-bhe@redhat.com> <20190429002318.GA25400@MiWiFi-R3L-srv> <20190429135536.GC2324@zn.tnic> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190429135536.GC2324@zn.tnic> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: bp@alien8.de Cc: fanc.fnst@cn.fujitsu.com, kasong@redhat.com, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, hpa@zytor.com, j-nomura@ce.jp.nec.com, tglx@linutronix.de, dyoung@redhat.com T24gMDQvMjkvMTkgYXQgMDM6NTVwbSwgQm9yaXNsYXYgUGV0a292IHdyb3RlOgo+IE9uIE1vbiwg QXByIDI5LCAyMDE5IGF0IDA4OjIzOjE4QU0gKzA4MDAsIEJhb3F1YW4gSGUgd3JvdGU6Cj4gPiAr c3RhdGljIGludAo+ID4gK21hcF9hY3BpX3RhYmxlcyhzdHJ1Y3QgeDg2X21hcHBpbmdfaW5mbyAq aW5mbywgcGdkX3QgKmxldmVsNHApCj4gPiArewo+ID4gKwl1bnNpZ25lZCBsb25nIGZsYWdzID0g SU9SRVNPVVJDRV9NRU0gfCBJT1JFU09VUkNFX0JVU1k7Cj4gPiArCXN0cnVjdCBpbml0X3BndGFi bGVfZGF0YSBkYXRhOwo+ID4gKwo+ID4gKwlkYXRhLmluZm8gPSBpbmZvOwo+ID4gKwlkYXRhLmxl dmVsNHAgPSBsZXZlbDRwOwo+ID4gKwlmbGFncyA9IElPUkVTT1VSQ0VfTUVNIHwgSU9SRVNPVVJD RV9CVVNZOwo+ID4gKwlyZXR1cm4gd2Fsa19pb21lbV9yZXNfZGVzYyhJT1JFU19ERVNDX0FDUElf VEFCTEVTLCBmbGFncywgMCwgLTEsCj4gPiArCQkJCSAgICZkYXRhLCBtZW1fcmVnaW9uX2NhbGxi YWNrKTsKPiA+ICt9Cj4gPiArI2Vsc2UKPiA+ICtzdGF0aWMgaW50IGluaXRfYWNwaV9wZ3RhYmxl KHN0cnVjdCB4ODZfbWFwcGluZ19pbmZvICppbmZvLAo+IAo+IERpZCB5b3UgYXQgbGVhc3QgYnVp bGQtdGVzdCB0aGUgIUNPTkZJR19BQ1BJIGNhc2U/Cj4gCj4gYXJjaC94ODYva2VybmVsL21hY2hp bmVfa2V4ZWNfNjQuYzogSW4gZnVuY3Rpb24g4oCYaW5pdF9wZ3RhYmxl4oCZOgo+IGFyY2gveDg2 L2tlcm5lbC9tYWNoaW5lX2tleGVjXzY0LmM6MjM3OjExOiBlcnJvcjogaW1wbGljaXQgZGVjbGFy YXRpb24gb2YgZnVuY3Rpb24g4oCYbWFwX2FjcGlfdGFibGVz4oCZOyBkaWQgeW91IG1lYW4g4oCY aW5pdF9hY3BpX3BndGFibGXigJk/IFstV2Vycm9yPWltcGxpY2l0LWZ1bmN0aW9uLWRlY2xhcmF0 aW9uXQo+ICAgcmVzdWx0ID0gbWFwX2FjcGlfdGFibGVzKCZpbmZvLCBsZXZlbDRwKTsKPiAgICAg ICAgICAgIF5+fn5+fn5+fn5+fn5+fgo+ICAgICAgICAgICAgaW5pdF9hY3BpX3BndGFibGUKPiAK PiAKPiBJIGRvbid0IHRoaW5rIHNvLiA7LSgKPiAKPiBTaWdoLCBuZXh0IHRpbWUgYXQgbGVhc3Qg YnVpbGQtdGVzdCB5b3VyIHBhdGNoIGJlZm9yZSBodXJyeWluZyBpdCBvdXQuIEkKPiBmaXhlZCBp dCB1cCBhbG9uZyB3aXRoIGRlY3lwaGVyaW5nIHRoZSBjb21taXQgbWVzc2FnZToKClNvcnJ5LCB0 aG91Z2h0IHRoZW0gc2ltcGxlLCBkaWRuJ3QgYnVpbGQgIUNPTkZJR19BQ1BJIGNhc2UuIFNob3Vs ZCBiZQptb3JlIGNhcmVmdWwuCgpUaGFua3MgZm9yIGZpeGluZyBpdCBhbmQgdGhlIGxvZyByZXdy aXRpbmcuCgo+IAo+IC0tLQo+IEZyb206IEthaXJ1aSBTb25nIDxrYXNvbmdAcmVkaGF0LmNvbT4K PiBEYXRlOiBNb24sIDI5IEFwciAyMDE5IDA4OjIzOjE4ICswODAwCj4gU3ViamVjdDogW1BBVENI XSB4ODYva2V4ZWM6IEFkZCB0aGUgRUZJIHN5c3RlbSB0YWJsZXMgYW5kIEFDUEkgdGFibGVzIHRv IHRoZSBpZGVudCBtYXAKPiAKPiBDdXJyZW50bHksIG9ubHkgdGhlIHdob2xlIHBoeXNpY2FsIG1l bW9yeSBpcyBpZGVudGl0eS1tYXBwZWQgZm9yIHRoZQo+IGtleGVjIGtlcm5lbCBhbmQgdGhlIHJl Z2lvbnMgcmVzZXJ2ZWQgYnkgZmlybXdhcmUgYXJlIGlnbm9yZWQuCj4gCj4gSG93ZXZlciwgdGhl IHJlY2VudCBhZGRpdGlvbiBvZiBSU0RQIHBhcnNpbmcgaW4gdGhlIGRlY29tcHJlc3Npb24gc3Rh Z2UKPiBhbmQgZXNwZWNpYWxseToKPiAKPiAgIDMzZjBkZjhkODQzZCAoIng4Ni9ib290OiBTZWFy Y2ggZm9yIFJTRFAgaW4gdGhlIEVGSSB0YWJsZXMiKQo+IAo+IHdoaWNoIHRyaWVzIHRvIGFjY2Vz cyBFRkkgc3lzdGVtIHRhYmxlcyBhbmQgdG8gZGlnIG91dCB0aGUgUkRTUCBhZGRyZXNzCj4gZnJv bSB0aGVyZSwgYmVjb21lcyBhIHByb2JsZW0gYmVjYXVzZSBpbiBjZXJ0YWluIGNvbmZpZ3VyYXRp b25zLCB0aGV5Cj4gbWlnaHQgbm90IGJlIG1hcHBlZCBpbiB0aGUga2V4ZWMnZWQga2VybmVsJ3Mg YWRkcmVzcyBzcGFjZS4KPiAKPiBXaGF0IGlzIG1vcmUsIHRoaXMgcHJvYmxlbSBkb2Vzbid0IGFw cGVhciBvbiBhbGwgc3lzdGVtcyBiZWNhdXNlIHRoZQo+IGtleGVjIGtlcm5lbCB1c2VzIGdpZ2Fi eXRlIHBhZ2VzIHRvIGJ1aWxkIHRoZSBpZGVudGl0eSBtYXBwaW5nLiBBbmQKPiB0aGUgRUZJIHN5 c3RlbSB0YWJsZXMgYW5kIEFDUEkgdGFibGVzIGNhbiwgZGVwZW5kaW5nIG9uIHRoZSBzeXN0ZW0K PiBjb25maWd1cmF0aW9uLCBlbmQgdXAgYmVpbmcgbWFwcGVkIGFzIHBhcnQgb2YgYWxsIHBoeXNp Y2FsIG1lbW9yeSwgaWYKPiB0aGV5IHNoYXJlIHRoZSBzYW1lIDEgR0IgYXJlYSB3aXRoIHRoZSBw aHlzaWNhbCBtZW1vcnkuCj4gCj4gVGhlcmVmb3JlLCBtYWtlIHN1cmUgdGhleSdyZSBhbHdheXMg bWFwcGVkLgo+IAo+ICBbIGJwOiBwcm9kdWN0aXplIGhhbGYtYmFrZWQgcGF0Y2g6Cj4gICAgLSBy ZXdyaXRlIGNvbW1pdCBtZXNzYWdlLgo+ICAgIC0gcy9pbml0X2FjcGlfcGd0YWJsZS9tYXBfYWNw aV90YWJsZXMvIGluIHRoZSAhQUNQSSBjYXNlLiBdCj4gCj4gU2lnbmVkLW9mZi1ieTogS2FpcnVp IFNvbmcgPGthc29uZ0ByZWRoYXQuY29tPgo+IFNpZ25lZC1vZmYtYnk6IEJhb3F1YW4gSGUgPGJo ZUByZWRoYXQuY29tPgo+IFNpZ25lZC1vZmYtYnk6IEJvcmlzbGF2IFBldGtvdiA8YnBAc3VzZS5k ZT4KPiBDYzogZHlvdW5nQHJlZGhhdC5jb20KPiBDYzogZmFuYy5mbnN0QGNuLmZ1aml0c3UuY29t Cj4gQ2M6ICJILiBQZXRlciBBbnZpbiIgPGhwYUB6eXRvci5jb20+Cj4gQ2M6IEluZ28gTW9sbmFy IDxtaW5nb0ByZWRoYXQuY29tPgo+IENjOiBqLW5vbXVyYUBjZS5qcC5uZWMuY29tCj4gQ2M6IGtl eGVjQGxpc3RzLmluZnJhZGVhZC5vcmcKPiBDYzogIktpcmlsbCBBLiBTaHV0ZW1vdiIgPGtpcmls bC5zaHV0ZW1vdkBsaW51eC5pbnRlbC5jb20+Cj4gQ2M6IExpYW5ibyBKaWFuZyA8bGlqaWFuZ0By ZWRoYXQuY29tPgo+IENjOiBUZXRzdW8gSGFuZGEgPHBlbmd1aW4ta2VybmVsQEktbG92ZS5TQUtV UkEubmUuanA+Cj4gQ2M6IFRob21hcyBHbGVpeG5lciA8dGdseEBsaW51dHJvbml4LmRlPgo+IENj OiB4ODYtbWwgPHg4NkBrZXJuZWwub3JnPgo+IExpbms6IGh0dHBzOi8vbGttbC5rZXJuZWwub3Jn L3IvMjAxOTA0MjkwMDIzMTguR0EyNTQwMEBNaVdpRmktUjNMLXNydgo+IC0tLQo+ICBhcmNoL3g4 Ni9rZXJuZWwvbWFjaGluZV9rZXhlY182NC5jIHwgNzUgKysrKysrKysrKysrKysrKysrKysrKysr KysrKysrCj4gIDEgZmlsZSBjaGFuZ2VkLCA3NSBpbnNlcnRpb25zKCspCj4gCj4gZGlmZiAtLWdp dCBhL2FyY2gveDg2L2tlcm5lbC9tYWNoaW5lX2tleGVjXzY0LmMgYi9hcmNoL3g4Ni9rZXJuZWwv bWFjaGluZV9rZXhlY182NC5jCj4gaW5kZXggY2ViYTQwOGVhOTgyLi4zYzc3YmRmN2IzMmEgMTAw NjQ0Cj4gLS0tIGEvYXJjaC94ODYva2VybmVsL21hY2hpbmVfa2V4ZWNfNjQuYwo+ICsrKyBiL2Fy Y2gveDg2L2tlcm5lbC9tYWNoaW5lX2tleGVjXzY0LmMKPiBAQCAtMTgsNiArMTgsNyBAQAo+ICAj aW5jbHVkZSA8bGludXgvaW8uaD4KPiAgI2luY2x1ZGUgPGxpbnV4L3N1c3BlbmQuaD4KPiAgI2lu Y2x1ZGUgPGxpbnV4L3ZtYWxsb2MuaD4KPiArI2luY2x1ZGUgPGxpbnV4L2VmaS5oPgo+ICAKPiAg I2luY2x1ZGUgPGFzbS9pbml0Lmg+Cj4gICNpbmNsdWRlIDxhc20vcGd0YWJsZS5oPgo+IEBAIC0y OSw2ICszMCw0MyBAQAo+ICAjaW5jbHVkZSA8YXNtL3NldHVwLmg+Cj4gICNpbmNsdWRlIDxhc20v c2V0X21lbW9yeS5oPgo+ICAKPiArI2lmZGVmIENPTkZJR19BQ1BJCj4gKy8qCj4gKyAqIFVzZWQg d2hpbGUgYWRkaW5nIG1hcHBpbmcgZm9yIEFDUEkgdGFibGVzLgo+ICsgKiBDYW4gYmUgcmV1c2Vk IHdoZW4gb3RoZXIgaW9tZW0gcmVnaW9ucyBuZWVkIGJlIG1hcHBlZAo+ICsgKi8KPiArc3RydWN0 IGluaXRfcGd0YWJsZV9kYXRhIHsKPiArCXN0cnVjdCB4ODZfbWFwcGluZ19pbmZvICppbmZvOwo+ ICsJcGdkX3QgKmxldmVsNHA7Cj4gK307Cj4gKwo+ICtzdGF0aWMgaW50IG1lbV9yZWdpb25fY2Fs bGJhY2soc3RydWN0IHJlc291cmNlICpyZXMsIHZvaWQgKmFyZykKPiArewo+ICsJc3RydWN0IGlu aXRfcGd0YWJsZV9kYXRhICpkYXRhID0gYXJnOwo+ICsJdW5zaWduZWQgbG9uZyBtc3RhcnQsIG1l bmQ7Cj4gKwo+ICsJbXN0YXJ0ID0gcmVzLT5zdGFydDsKPiArCW1lbmQgPSBtc3RhcnQgKyByZXNv dXJjZV9zaXplKHJlcykgLSAxOwo+ICsKPiArCXJldHVybiBrZXJuZWxfaWRlbnRfbWFwcGluZ19p bml0KGRhdGEtPmluZm8sIGRhdGEtPmxldmVsNHAsIG1zdGFydCwgbWVuZCk7Cj4gK30KPiArCj4g K3N0YXRpYyBpbnQKPiArbWFwX2FjcGlfdGFibGVzKHN0cnVjdCB4ODZfbWFwcGluZ19pbmZvICpp bmZvLCBwZ2RfdCAqbGV2ZWw0cCkKPiArewo+ICsJdW5zaWduZWQgbG9uZyBmbGFncyA9IElPUkVT T1VSQ0VfTUVNIHwgSU9SRVNPVVJDRV9CVVNZOwo+ICsJc3RydWN0IGluaXRfcGd0YWJsZV9kYXRh IGRhdGE7Cj4gKwo+ICsJZGF0YS5pbmZvID0gaW5mbzsKPiArCWRhdGEubGV2ZWw0cCA9IGxldmVs NHA7Cj4gKwlmbGFncyA9IElPUkVTT1VSQ0VfTUVNIHwgSU9SRVNPVVJDRV9CVVNZOwo+ICsJcmV0 dXJuIHdhbGtfaW9tZW1fcmVzX2Rlc2MoSU9SRVNfREVTQ19BQ1BJX1RBQkxFUywgZmxhZ3MsIDAs IC0xLAo+ICsJCQkJICAgJmRhdGEsIG1lbV9yZWdpb25fY2FsbGJhY2spOwo+ICt9Cj4gKyNlbHNl Cj4gK3N0YXRpYyBpbnQgbWFwX2FjcGlfdGFibGVzKHN0cnVjdCB4ODZfbWFwcGluZ19pbmZvICpp bmZvLCBwZ2RfdCAqbGV2ZWw0cCkgeyByZXR1cm4gMDsgfQo+ICsjZW5kaWYKPiArCj4gICNpZmRl ZiBDT05GSUdfS0VYRUNfRklMRQo+ICBjb25zdCBzdHJ1Y3Qga2V4ZWNfZmlsZV9vcHMgKiBjb25z dCBrZXhlY19maWxlX2xvYWRlcnNbXSA9IHsKPiAgCQkma2V4ZWNfYnpJbWFnZTY0X29wcywKPiBA QCAtMzYsNiArNzQsMzEgQEAgY29uc3Qgc3RydWN0IGtleGVjX2ZpbGVfb3BzICogY29uc3Qga2V4 ZWNfZmlsZV9sb2FkZXJzW10gPSB7Cj4gIH07Cj4gICNlbmRpZgo+ICAKPiArc3RhdGljIGludAo+ ICttYXBfZWZpX3N5c3RhYihzdHJ1Y3QgeDg2X21hcHBpbmdfaW5mbyAqaW5mbywgcGdkX3QgKmxl dmVsNHApCj4gK3sKPiArI2lmZGVmIENPTkZJR19FRkkKPiArCXVuc2lnbmVkIGxvbmcgbXN0YXJ0 LCBtZW5kOwo+ICsKPiArCWlmICghZWZpX2VuYWJsZWQoRUZJX0JPT1QpKQo+ICsJCXJldHVybiAw Owo+ICsKPiArCW1zdGFydCA9IChib290X3BhcmFtcy5lZmlfaW5mby5lZmlfc3lzdGFiIHwKPiAr CQkJKCh1NjQpYm9vdF9wYXJhbXMuZWZpX2luZm8uZWZpX3N5c3RhYl9oaTw8MzIpKTsKPiArCj4g KwlpZiAoZWZpX2VuYWJsZWQoRUZJXzY0QklUKSkKPiArCQltZW5kID0gbXN0YXJ0ICsgc2l6ZW9m KGVmaV9zeXN0ZW1fdGFibGVfNjRfdCk7Cj4gKwllbHNlCj4gKwkJbWVuZCA9IG1zdGFydCArIHNp emVvZihlZmlfc3lzdGVtX3RhYmxlXzMyX3QpOwo+ICsKPiArCWlmICghbXN0YXJ0KQo+ICsJCXJl dHVybiAwOwo+ICsKPiArCXJldHVybiBrZXJuZWxfaWRlbnRfbWFwcGluZ19pbml0KGluZm8sIGxl dmVsNHAsIG1zdGFydCwgbWVuZCk7Cj4gKyNlbmRpZgo+ICsJcmV0dXJuIDA7Cj4gK30KPiArCj4g IHN0YXRpYyB2b2lkIGZyZWVfdHJhbnNpdGlvbl9wZ3RhYmxlKHN0cnVjdCBraW1hZ2UgKmltYWdl KQo+ICB7Cj4gIAlmcmVlX3BhZ2UoKHVuc2lnbmVkIGxvbmcpaW1hZ2UtPmFyY2gucDRkKTsKPiBA QCAtMTU5LDYgKzIyMiwxOCBAQCBzdGF0aWMgaW50IGluaXRfcGd0YWJsZShzdHJ1Y3Qga2ltYWdl ICppbWFnZSwgdW5zaWduZWQgbG9uZyBzdGFydF9wZ3RhYmxlKQo+ICAJCQlyZXR1cm4gcmVzdWx0 Owo+ICAJfQo+ICAKPiArCS8qCj4gKwkgKiBQcmVwYXJlIEVGSSBzeXN0YWIgYW5kIEFDUEkgdGFi bGVzIGZvciBrZXhlYyBrZXJuZWwgc2luY2UgdGhleSBhcmUKPiArCSAqIG5vdCBjb3ZlcmVkIGJ5 IHBmbl9tYXBwZWQuCj4gKwkgKi8KPiArCXJlc3VsdCA9IG1hcF9lZmlfc3lzdGFiKCZpbmZvLCBs ZXZlbDRwKTsKPiArCWlmIChyZXN1bHQpCj4gKwkJcmV0dXJuIHJlc3VsdDsKPiArCj4gKwlyZXN1 bHQgPSBtYXBfYWNwaV90YWJsZXMoJmluZm8sIGxldmVsNHApOwo+ICsJaWYgKHJlc3VsdCkKPiAr CQlyZXR1cm4gcmVzdWx0Owo+ICsKPiAgCXJldHVybiBpbml0X3RyYW5zaXRpb25fcGd0YWJsZShp bWFnZSwgbGV2ZWw0cCk7Cj4gIH0KPiAgCj4gLS0gCj4gMi4yMS4wCj4gCj4gLS0gCj4gUmVnYXJk cy9HcnVzcywKPiAgICAgQm9yaXMuCj4gCj4gR29vZCBtYWlsaW5nIHByYWN0aWNlcyBmb3IgNDAw OiBhdm9pZCB0b3AtcG9zdGluZyBhbmQgdHJpbSB0aGUgcmVwbHkuCgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwprZXhlYyBtYWlsaW5nIGxpc3QKa2V4ZWNA bGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xp c3RpbmZvL2tleGVjCg==