From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) by casper.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1g5oIj-0001tO-5G for kexec@lists.infradead.org; Fri, 28 Sep 2018 08:39:07 +0000 Date: Fri, 28 Sep 2018 10:38:52 +0200 From: Borislav Petkov Subject: Re: [PATCH v7 RESEND 4/4] kdump/vmcore: support encrypted old memory with SME enabled Message-ID: <20180928083852.GA21895@zn.tnic> References: <20180927071954.29615-1-lijiang@redhat.com> <20180927071954.29615-5-lijiang@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20180927071954.29615-5-lijiang@redhat.com> 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: Lianbo Jiang Cc: thomas.lendacky@amd.com, jroedel@suse.de, brijesh.singh@amd.com, bhe@redhat.com, tiwai@suse.de, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, mingo@redhat.com, baiyaowei@cmss.chinamobile.com, hpa@zytor.com, bhelgaas@google.com, tglx@linutronix.de, dyoung@redhat.com, akpm@linux-foundation.org, dan.j.williams@intel.com T24gVGh1LCBTZXAgMjcsIDIwMTggYXQgMDM6MTk6NTRQTSArMDgwMCwgTGlhbmJvIEppYW5nIHdy b3RlOgo+IEluIGtkdW1wIGtlcm5lbCwgd2UgbmVlZCB0byBkdW1wIHRoZSBvbGQgbWVtb3J5IGlu dG8gdm1jb3JlIGZpbGUsaWYgU01FCj4gaXMgZW5hYmxlZCBpbiB0aGUgZmlyc3Qga2VybmVsLCB3 ZSBoYXZlIHRvIHJlbWFwIHRoZSBvbGQgbWVtb3J5IHdpdGggdGhlCj4gbWVtb3J5IGVuY3J5cHRp b24gbWFzaywgd2hpY2ggd2lsbCBiZSBhdXRvbWF0aWNhbGx5IGRlY3J5cHRlZCB3aGVuIHdlCj4g cmVhZCBmcm9tIERSQU0uCj4gCj4gRm9yIFNNRSBrZHVtcCwgdGhlcmUgYXJlIHR3byBjYXNlcyB0 aGF0IGRvZXNuJ3Qgc3VwcG9ydDoKCi4uLiBhbmQgd2hpY2ggYXJlIHNpbXBseSBzaWxseSB0byBz dXBwb3J0LgoKPiAKPiAgLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLQo+IHwgZmlyc3Qta2VybmVsIHwgc2Vjb25kLWtlcm5lbCB8IGtkdW1wIHN1cHBvcnQgfAo+ IHwgICAgICAobWVtX2VuY3J5cHQ9b258b2ZmKSAgICB8ICAgKHllc3xubykgICAgfAo+IHwtLS0t LS0tLS0tLS0tLSstLS0tLS0tLS0tLS0tLS0rLS0tLS0tLS0tLS0tLS0tfAo+IHwgICAgIG9uICAg ICAgIHwgICAgIG9uICAgICAgICB8ICAgICB5ZXMgICAgICAgfAo+IHwgICAgIG9mZiAgICAgIHwg ICAgIG9mZiAgICAgICB8ICAgICB5ZXMgICAgICAgfAo+IHwgICAgIG9uICAgICAgIHwgICAgIG9m ZiAgICAgICB8ICAgICBubyAgICAgICAgfAo+IHwgICAgIG9mZiAgICAgIHwgICAgIG9uICAgICAg ICB8ICAgICBubyAgICAgICAgfAo+IHxfX19fX19fX19fX19fX3xfX19fX19fX19fX19fX198X19f X19fX19fX19fX19ffAo+IAo+IDEuIFNNRSBpcyBlbmFibGVkIGluIHRoZSBmaXJzdCBrZXJuZWws IGJ1dCBTTUUgaXMgZGlzYWJsZWQgaW4ga2R1bXAga2VybmVsCj4gSW4gdGhpcyBjYXNlLCBiZWNh dXNlIHRoZSBvbGQgbWVtb3J5IGlzIGVuY3J5cHRlZCwgd2UgY2FuJ3QgZGVjcnlwdCB0aGUKPiBv bGQgbWVtb3J5Lgo+IAo+IDIuIFNNRSBpcyBkaXNhYmxlZCBpbiB0aGUgZmlyc3Qga2VybmVsLCBi dXQgU01FIGlzIGVuYWJsZWQgaW4ga2R1bXAga2VybmVsCj4gT24gdGhlIG9uZSBoYW5kLCB0aGUg b2xkIG1lbW9yeSBpcyB1bmVuY3J5cHRlZCwgdGhlIG9sZCBtZW1vcnkgY2FuIGJlIGR1bXBlZAoK cy91bmVuY3J5cHRlZC9kZWNyeXB0ZWQvZwoKQnV0IEkgbWVudGlvbmVkIHRoYXQgYWxyZWFkeS4K Cj4gYXMgdXN1YWwsIHdlIGRvbid0IG5lZWQgdG8gZW5hYmxlIFNNRSBpbiBrZHVtcCBrZXJuZWw7 IE9uIHRoZSBvdGhlciBoYW5kLCBpdAo+IHdpbGwgaW5jcmVhc2UgdGhlIGNvbXBsZXhpdHkgb2Yg dGhlIGNvZGUsIHdlIHdpbGwgaGF2ZSB0byBjb25zaWRlciBob3cgdG8KPiBwYXNzIHRoZSBTTUUg ZmxhZyBmcm9tIHRoZSBmaXJzdCBrZXJuZWwgdG8gdGhlIGtkdW1wIGtlcm5lbCwgaXQgaXMgcmVh bGx5Cj4gdG9vIGV4cGVuc2l2ZSB0byBkbyB0aGlzLgo+IAo+IFRoaXMgcGF0Y2hlcyBhcmUgb25s eSBmb3IgU01FIGtkdW1wLCB0aGUgcGF0Y2hlcyBkb24ndCBzdXBwb3J0IFNFViBrZHVtcC4KClBs ZWFzZSByZXdyaXRlIHRoYXQgY29tbWl0IG1lc3NhZ2UgaW4gcGFzc2l2ZSB2b2ljZS4gSS5lLiwg Z2V0IHJpZCBvZgp0aGF0ICJ3ZSIuCgo+IAo+IFNpZ25lZC1vZmYtYnk6IExpYW5ibyBKaWFuZyA8 bGlqaWFuZ0ByZWRoYXQuY29tPgo+IFJldmlld2VkLWJ5OiBUb20gTGVuZGFja3kgPHRob21hcy5s ZW5kYWNreUBhbWQuY29tPgo+IC0tLQo+ICBhcmNoL3g4Ni9rZXJuZWwvTWFrZWZpbGUgICAgICAg ICAgICAgfCAgMSArCj4gIGFyY2gveDg2L2tlcm5lbC9jcmFzaF9kdW1wX2VuY3J5cHQuYyB8IDUz ICsrKysrKysrKysrKysrKysrKysrKysrKysrKysKPiAgZnMvcHJvYy92bWNvcmUuYyAgICAgICAg ICAgICAgICAgICAgIHwgMjEgKysrKysrKy0tLS0KPiAgaW5jbHVkZS9saW51eC9jcmFzaF9kdW1w LmggICAgICAgICAgIHwgMTIgKysrKysrKwo+ICA0IGZpbGVzIGNoYW5nZWQsIDgxIGluc2VydGlv bnMoKyksIDYgZGVsZXRpb25zKC0pCj4gIGNyZWF0ZSBtb2RlIDEwMDY0NCBhcmNoL3g4Ni9rZXJu ZWwvY3Jhc2hfZHVtcF9lbmNyeXB0LmMKPiAKPiBkaWZmIC0tZ2l0IGEvYXJjaC94ODYva2VybmVs L01ha2VmaWxlIGIvYXJjaC94ODYva2VybmVsL01ha2VmaWxlCj4gaW5kZXggODgyNGQwMWMwYzM1 Li5kZmJlYWUwZTM1Y2UgMTAwNjQ0Cj4gLS0tIGEvYXJjaC94ODYva2VybmVsL01ha2VmaWxlCj4g KysrIGIvYXJjaC94ODYva2VybmVsL01ha2VmaWxlCj4gQEAgLTk3LDYgKzk3LDcgQEAgb2JqLSQo Q09ORklHX0tFWEVDX0NPUkUpCSs9IG1hY2hpbmVfa2V4ZWNfJChCSVRTKS5vCj4gIG9iai0kKENP TkZJR19LRVhFQ19DT1JFKQkrPSByZWxvY2F0ZV9rZXJuZWxfJChCSVRTKS5vIGNyYXNoLm8KPiAg b2JqLSQoQ09ORklHX0tFWEVDX0ZJTEUpCSs9IGtleGVjLWJ6aW1hZ2U2NC5vCj4gIG9iai0kKENP TkZJR19DUkFTSF9EVU1QKQkrPSBjcmFzaF9kdW1wXyQoQklUUykubwo+ICtvYmotJChDT05GSUdf QU1EX01FTV9FTkNSWVBUKQkrPSBjcmFzaF9kdW1wX2VuY3J5cHQubwoKTm8gbm8uCgpUaGlzIHdp bGwgYnVpbGQgZXZlbiBpbiB0aGUgQ09ORklHX0NSQVNIX0RVTVA9biBjYXNlLgoKV2h5IGRvZXMg dGhpcyBuZWVkIHRvIGJlIGV2ZW4gYSBzZXBhcmF0ZSBjb21waWxhdGlvbiB1bml0PyBJdCBpcyBh IGZpbGUKY29udGFpbmluZyBhIHNpbmdsZSBmdW5jdGlvbj8hPyEKCkkgd291bGQgbG92ZSB0byBr bm93IHdoYXQgdGhlIGxvZ2ljIGJlaGluZCB0aGlzIHdhcy4uLgoKPiAgb2JqLXkJCQkJKz0ga3By b2Jlcy8KPiAgb2JqLSQoQ09ORklHX01PRFVMRVMpCQkrPSBtb2R1bGUubwo+ICBvYmotJChDT05G SUdfRE9VQkxFRkFVTFQpCSs9IGRvdWJsZWZhdWx0Lm8KPiBkaWZmIC0tZ2l0IGEvYXJjaC94ODYv a2VybmVsL2NyYXNoX2R1bXBfZW5jcnlwdC5jIGIvYXJjaC94ODYva2VybmVsL2NyYXNoX2R1bXBf ZW5jcnlwdC5jCj4gbmV3IGZpbGUgbW9kZSAxMDA2NDQKPiBpbmRleCAwMDAwMDAwMDAwMDAuLmUx YjFhNTc3ZjE5Nwo+IC0tLSAvZGV2L251bGwKPiArKysgYi9hcmNoL3g4Ni9rZXJuZWwvY3Jhc2hf ZHVtcF9lbmNyeXB0LmMKPiBAQCAtMCwwICsxLDUzIEBACj4gKy8vIFNQRFgtTGljZW5zZS1JZGVu dGlmaWVyOiBHUEwtMi4wCj4gKy8qCj4gKyAqCU1lbW9yeSBwcmVzZXJ2aW5nIHJlYm9vdCByZWxh dGVkIGNvZGUuCj4gKyAqCj4gKyAqCUNyZWF0ZWQgYnk6IExpYW5ibyBKaWFuZyAobGlqaWFuZ0By ZWRoYXQuY29tKQo+ICsgKglDb3B5cmlnaHQgKEMpIFJlZEhhdCBDb3Jwb3JhdGlvbiwgMjAxOC4g QWxsIHJpZ2h0cyByZXNlcnZlZAo+ICsgKi8KPiArCj4gKyNpbmNsdWRlIDxsaW51eC9lcnJuby5o Pgo+ICsjaW5jbHVkZSA8bGludXgvY3Jhc2hfZHVtcC5oPgo+ICsjaW5jbHVkZSA8bGludXgvdWFj Y2Vzcy5oPgo+ICsjaW5jbHVkZSA8bGludXgvaW8uaD4KPiArCj4gKy8qKgo+ICsgKiBjb3B5X29s ZG1lbV9wYWdlX2VuY3J5cHRlZCAtIGNvcHkgb25lIHBhZ2UgZnJvbSAib2xkbWVtIGVuY3J5cHRl ZCIKPiArICogQHBmbjogcGFnZSBmcmFtZSBudW1iZXIgdG8gYmUgY29waWVkCj4gKyAqIEBidWY6 IHRhcmdldCBtZW1vcnkgYWRkcmVzcyBmb3IgdGhlIGNvcHk7IHRoaXMgY2FuIGJlIGluIGtlcm5l bCBhZGRyZXNzCj4gKyAqCXNwYWNlIG9yIHVzZXIgYWRkcmVzcyBzcGFjZSAoc2VlIEB1c2VyYnVm KQo+ICsgKiBAY3NpemU6IG51bWJlciBvZiBieXRlcyB0byBjb3B5Cj4gKyAqIEBvZmZzZXQ6IG9m ZnNldCBpbiBieXRlcyBpbnRvIHRoZSBwYWdlIChiYXNlZCBvbiBwZm4pIHRvIGJlZ2luIHRoZSBj b3B5Cj4gKyAqIEB1c2VyYnVmOiBpZiBzZXQsIEBidWYgaXMgaW4gdXNlciBhZGRyZXNzIHNwYWNl LCB1c2UgY29weV90b191c2VyKCksCj4gKyAqCW90aGVyd2lzZSBAYnVmIGlzIGluIGtlcm5lbCBh ZGRyZXNzIHNwYWNlLCB1c2UgbWVtY3B5KCkuCj4gKyAqCj4gKyAqIENvcHkgYSBwYWdlIGZyb20g Im9sZG1lbSBlbmNyeXB0ZWQiLiBGb3IgdGhpcyBwYWdlLCB0aGVyZSBpcyBubyBwdGUKCldoYXQg aXMgIm9sZG1lbSBlbmNyeXB0ZWQiPyBXaHkgY2FuJ3QgeW91IGV4cGxhaW4gdGhhdCBpbiBwbGFp biBlbmdsaXNoPwpOb3RlIHRoYXQgdGhvc2UgY29tbWVudHMgYXJlIG5vdCB3cml0ZS1vbmx5IGJ1 dCBhcmUgbWVhbnQgZm9yIG90aGVyCnBlb3BsZSB0byByZWFkIGluIHRoZSBmdXR1cmUuCgo+ICsg KiBtYXBwZWQgaW4gdGhlIGN1cnJlbnQga2VybmVsLiBXZSBzdGl0Y2ggdXAgYSBwdGUsIHNpbWls YXIgdG8KPiArICoga21hcF9hdG9taWMuCj4gKyAqLwo+ICsKPiArc3NpemVfdCBjb3B5X29sZG1l bV9wYWdlX2VuY3J5cHRlZCh1bnNpZ25lZCBsb25nIHBmbiwgY2hhciAqYnVmLAo+ICsJCXNpemVf dCBjc2l6ZSwgdW5zaWduZWQgbG9uZyBvZmZzZXQsIGludCB1c2VyYnVmKQoKQWxpZ24gYXJndW1l bnRzIG9uIHRoZSBvcGVuaW5nIGJyYWNlLgoKPiArewo+ICsJdm9pZCAgKnZhZGRyOwo+ICsKPiAr CWlmICghY3NpemUpCj4gKwkJcmV0dXJuIDA7Cj4gKwo+ICsJdmFkZHIgPSAoX19mb3JjZSB2b2lk ICopaW9yZW1hcF9lbmNyeXB0ZWQocGZuIDw8IFBBR0VfU0hJRlQsCj4gKwkJCQkJCSAgUEFHRV9T SVpFKTsKCkxldCBpdCBzdGljayBvdXQuCgo+ICsJaWYgKCF2YWRkcikKPiArCQlyZXR1cm4gLUVO T01FTTsKPiArCj4gKwlpZiAodXNlcmJ1Zikgewo+ICsJCWlmIChjb3B5X3RvX3VzZXIoKHZvaWQg X191c2VyICopYnVmLCB2YWRkciArIG9mZnNldCwgY3NpemUpKSB7Cj4gKwkJCWlvdW5tYXAoKHZv aWQgX19pb21lbSAqKXZhZGRyKTsKPiArCQkJcmV0dXJuIC1FRkFVTFQ7Cj4gKwkJfQo+ICsJfSBl bHNlCj4gKwkJbWVtY3B5KGJ1ZiwgdmFkZHIgKyBvZmZzZXQsIGNzaXplKTsKPiArCj4gKwlzZXRf aW91bm1hcF9ub25sYXp5KCk7Cj4gKwlpb3VubWFwKCh2b2lkIF9faW9tZW0gKil2YWRkcik7Cj4g KwlyZXR1cm4gY3NpemU7Cj4gK30KPiBkaWZmIC0tZ2l0IGEvZnMvcHJvYy92bWNvcmUuYyBiL2Zz L3Byb2Mvdm1jb3JlLmMKPiBpbmRleCBjYmRlNzI4ZjhhYzYuLjMwNjVjOGJhZGE2YSAxMDA2NDQK PiAtLS0gYS9mcy9wcm9jL3ZtY29yZS5jCj4gKysrIGIvZnMvcHJvYy92bWNvcmUuYwo+IEBAIC0y NSw2ICsyNSw5IEBACj4gICNpbmNsdWRlIDxsaW51eC9wYWdlbWFwLmg+Cj4gICNpbmNsdWRlIDxs aW51eC91YWNjZXNzLmg+Cj4gICNpbmNsdWRlIDxhc20vaW8uaD4KPiArI2luY2x1ZGUgPGxpbnV4 L2lvLmg+Cj4gKyNpbmNsdWRlIDxsaW51eC9tZW1fZW5jcnlwdC5oPgo+ICsjaW5jbHVkZSA8YXNt L3BndGFibGUuaD4KCkRvIHlvdSBub3Qgc2VlIGhvdyB0aGUgb3JkZXIgb2YgdGhlIGluY2x1ZGUg ZmlsZXMgaXM/IEZpcnN0IGxpbnV4LyB0aGVuCmFzbS8sIHRoZW4gbG9jYWwgaGVhZGVycy4KCj4g ICNpbmNsdWRlICJpbnRlcm5hbC5oIgoKQW5kIHlvdSBkb24ndCBuZWVkIHRoYXQgaWYgeW91IGRy b3AgdGhhdCBzaWxseSBjcmFzaF9kdW1wX2VuY3J5cHQuYyB0aGluZy4KCj4gIAo+ICAvKiBMaXN0 IHJlcHJlc2VudGluZyBjaHVua3Mgb2YgY29udGlndW91cyBtZW1vcnkgYXJlYXMgYW5kIHRoZWly IG9mZnNldHMgaW4KPiBAQCAtOTgsNyArMTAxLDggQEAgc3RhdGljIGludCBwZm5faXNfcmFtKHVu c2lnbmVkIGxvbmcgcGZuKQo+ICAKPiAgLyogUmVhZHMgYSBwYWdlIGZyb20gdGhlIG9sZG1lbSBk ZXZpY2UgZnJvbSBnaXZlbiBvZmZzZXQuICovCj4gIHN0YXRpYyBzc2l6ZV90IHJlYWRfZnJvbV9v bGRtZW0oY2hhciAqYnVmLCBzaXplX3QgY291bnQsCj4gLQkJCQl1NjQgKnBwb3MsIGludCB1c2Vy YnVmKQo+ICsJCQkJdTY0ICpwcG9zLCBpbnQgdXNlcmJ1ZiwKPiArCQkJCWJvb2wgZW5jcnlwdGVk KQo+ICB7Cj4gIAl1bnNpZ25lZCBsb25nIHBmbiwgb2Zmc2V0Owo+ICAJc2l6ZV90IG5yX2J5dGVz Owo+IEBAIC0xMjAsOCArMTI0LDExIEBAIHN0YXRpYyBzc2l6ZV90IHJlYWRfZnJvbV9vbGRtZW0o Y2hhciAqYnVmLCBzaXplX3QgY291bnQsCj4gIAkJaWYgKHBmbl9pc19yYW0ocGZuKSA9PSAwKQo+ ICAJCQltZW1zZXQoYnVmLCAwLCBucl9ieXRlcyk7Cj4gIAkJZWxzZSB7Cj4gLQkJCXRtcCA9IGNv cHlfb2xkbWVtX3BhZ2UocGZuLCBidWYsIG5yX2J5dGVzLAo+IC0JCQkJCQlvZmZzZXQsIHVzZXJi dWYpOwo+ICsJCQl0bXAgPSBlbmNyeXB0ZWQgPyBjb3B5X29sZG1lbV9wYWdlX2VuY3J5cHRlZChw Zm4sCj4gKwkJCQkJICAgIGJ1ZiwgbnJfYnl0ZXMsIG9mZnNldCwgdXNlcmJ1ZikKPiArCQkJCQk6 IGNvcHlfb2xkbWVtX3BhZ2UocGZuLCBidWYsIG5yX2J5dGVzLAo+ICsJCQkJCQkJICAgb2Zmc2V0 LCB1c2VyYnVmKTsKCk1ha2UgdGhhdCBhIHNpbXBsZSBpZi1lbHNlIHNvIHRoYXQgaXQgY2FuIGFj dHVhbGx5IGJlIHJlYWRhYmxlLgoKLS0gClJlZ2FyZHMvR3J1c3MsCiAgICBCb3Jpcy4KClNVU0Ug TGludXggR21iSCwgR0Y6IEZlbGl4IEltZW5kw7ZyZmZlciwgSmFuZSBTbWl0aGFyZCwgR3JhaGFt IE5vcnRvbiwgSFJCIDIxMjg0IChBRyBOw7xybmJlcmcpCgpfX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fXwprZXhlYyBtYWlsaW5nIGxpc3QKa2V4ZWNAbGlzdHMu aW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZv L2tleGVjCg==