From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx3-rdu2.redhat.com ([66.187.233.73] helo=mx1.redhat.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fWCB1-0003dg-6A for kexec@lists.infradead.org; Fri, 22 Jun 2018 02:51:57 +0000 Date: Fri, 22 Jun 2018 10:51:27 +0800 From: Baoquan He Subject: Re: [PATCH 2/4 V3] Allocate pages for kdump without encryption when SME is enabled Message-ID: <20180622025127.GM29979@MiWiFi-R3L-srv> References: <20180616082714.32035-1-lijiang@redhat.com> <20180616082714.32035-3-lijiang@redhat.com> <20180621015306.GG29979@MiWiFi-R3L-srv> <20180621102321.GK29979@MiWiFi-R3L-srv> <49706f0e-03b6-8c43-c35f-c0b0338a17bd@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <49706f0e-03b6-8c43-c35f-c0b0338a17bd@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: lijiang Cc: thomas.lendacky@amd.com, iommu@lists.linux-foundation.org, dyoung@redhat.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org T24gMDYvMjEvMTggYXQgMDk6MjdwbSwgbGlqaWFuZyB3cm90ZToKPiDlnKggMjAxOOW5tDA25pyI MjHml6UgMTg6MjMsIEJhb3F1YW4gSGUg5YaZ6YGTOgo+ID4gT24gMDYvMjEvMTggYXQgMDE6MDZw bSwgbGlqaWFuZyB3cm90ZToKPiA+PiDlnKggMjAxOOW5tDA25pyIMjHml6UgMDk6NTMsIEJhb3F1 YW4gSGUg5YaZ6YGTOgo+ID4+PiBPbiAwNi8xNi8xOCBhdCAwNDoyN3BtLCBMaWFuYm8gSmlhbmcg d3JvdGU6Cj4gPj4+PiBXaGVuIFNNRSBpcyBlbmFibGVkIGluIHRoZSBmaXJzdCBrZXJuZWwsIHdl IHdpbGwgYWxsb2NhdGUgcGFnZXMKPiA+Pj4+IGZvciBrZHVtcCB3aXRob3V0IGVuY3J5cHRpb24g aW4gb3JkZXIgdG8gYmUgYWJsZSB0byBib290IHRoZQo+ID4+Pj4gc2Vjb25kIGtlcm5lbCBpbiB0 aGUgc2FtZSBtYW5uZXIgYXMga2V4ZWMsIHdoaWNoIGhlbHBzIHRvIGtlZXAKPiA+Pj4+IHRoZSBz YW1lIGNvZGUgc3R5bGUuCj4gPj4+Pgo+ID4+Pj4gU2lnbmVkLW9mZi1ieTogTGlhbmJvIEppYW5n IDxsaWppYW5nQHJlZGhhdC5jb20+Cj4gPj4+PiAtLS0KPiA+Pj4+ICBrZXJuZWwva2V4ZWNfY29y ZS5jIHwgMTIgKysrKysrKysrKysrCj4gPj4+PiAgMSBmaWxlIGNoYW5nZWQsIDEyIGluc2VydGlv bnMoKykKPiA+Pj4+Cj4gPj4+PiBkaWZmIC0tZ2l0IGEva2VybmVsL2tleGVjX2NvcmUuYyBiL2tl cm5lbC9rZXhlY19jb3JlLmMKPiA+Pj4+IGluZGV4IDIwZmVmMWEuLjNjMjJhOWIgMTAwNjQ0Cj4g Pj4+PiAtLS0gYS9rZXJuZWwva2V4ZWNfY29yZS5jCj4gPj4+PiArKysgYi9rZXJuZWwva2V4ZWNf Y29yZS5jCj4gPj4+PiBAQCAtNDcxLDYgKzQ3MSwxNiBAQCBzdGF0aWMgc3RydWN0IHBhZ2UgKmtp bWFnZV9hbGxvY19jcmFzaF9jb250cm9sX3BhZ2VzKHN0cnVjdCBraW1hZ2UgKmltYWdlLAo+ID4+ Pj4gIAkJfQo+ID4+Pj4gIAl9Cj4gPj4+PiAgCj4gPj4+PiArCWlmIChwYWdlcykgewo+ID4+Pj4g KwkJdW5zaWduZWQgaW50IGNvdW50LCBpOwo+ID4+Pj4gKwo+ID4+Pj4gKwkJcGFnZXMtPm1hcHBp bmcgPSBOVUxMOwo+ID4+Pj4gKwkJc2V0X3BhZ2VfcHJpdmF0ZShwYWdlcywgb3JkZXIpOwo+ID4+ Pj4gKwkJY291bnQgPSAxIDw8IG9yZGVyOwo+ID4+Pj4gKwkJZm9yIChpID0gMDsgaSA8IGNvdW50 OyBpKyspCj4gPj4+PiArCQkJU2V0UGFnZVJlc2VydmVkKHBhZ2VzICsgaSk7Cj4gPj4+Cj4gPj4+ IEkgZ3Vlc3MgeW91IG1pZ2h0IGltaXRhdGUgdGhlIGtleGVjIGNhc2UsIGhvd2V2ZXIga2V4ZWMg Z2V0IHBhZ2VzIGZyb20KPiA+Pj4gYnVkZHkuIENyYXNoIHBhZ2VzIGFyZSByZXNlcnZlZCBpbiBt ZW1ibG9jaywgdGhlc2UgY29kZXMgbWlnaHQgbWFrZSBubyBzZW5zZS4KPiA+Pj4KPiA+PiBUaGFu a3MgZm9yIHlvdXIgY29tbWVudHMuCj4gPj4gV2UgaGF2ZSBjaGFuZ2VkIHRoZSBhdHRyaWJ1dGUg b2YgcGFnZXMsIHNvIHRoZSBvcmlnaW5hbCBhdHRyaWJ1dGUgb2YgcGFnZXMgd2lsbCBiZQo+ID4+ IHJlc3RvcmVkIHdoZW4gdGhleSBmcmVlLgo+ID4gCj4gPiBIbW0sIHlvdSBjYW4gY2hlY2sgd2hh dCBraW1hZ2VfZnJlZSgpIGlzIGRvaW5nLCBhbmQgd2hlcmUKPiA+IGtpbWFnZS0+Y29udHJvbF9w YWdlcywgZGVzdF9wYWdlcywgdW51c2FibGVfcGFnZXMgaXMgYXNzaWduZWQuIERvIHlvdQo+ID4g a25vdyB3aGVyZSB0aGVzZSBvcmlnaW5hbCBhdHRyaWJ1dGUgb2YgcGFnZXMgY29tZXMgZnJvbSBh bmQgdGhleSBhcmUKPiA+IHVzZWQvbmVlZGVkIGluIENSQVNIIGNhc2UsIGlmIHlvdSBjYXJlIGFi b3V0IHRoZW0/Cj4gPiAKPiBPcmlnaW5hbGx5LCB3ZSB3YW50IHRvIGhhdmUgYW4gb3Bwb3J0dW5p dHkgdG8gcmVzdG9yZSB0aGUgcHJldmlvdXMgYXR0cmlidXRlIG9mIHBhZ2VzLCB0aGF0Cj4gc2hv dWxkIGJlIG1vcmUgYmV0dGVyIGlmIHRoZSBwYWdlcyBhcmUgcmVtZW1iZXJlZCBpbiAnaW1hZ2Ut PmNvbnRyb2xfcGFnZXMnLgoKQWdhaW4sIHBsZWFzZSBjaGVjayB3aG8gYXNzaWducyB2YWx1ZSBm b3IgJ2ltYWdlLT5jb250cm9sX3BhZ2VzJy4KCj4gSWYgd2UgcmVtb3ZlIHRoZXNlIGNvZGVzLCBp dCBpcyBhbHNvIGhhcm1sZXNzIGZvciBrZHVtcCwgYnV0IGl0IHdpbGwgYmVjb21lIHN0cmFuZ2Us IG1heWJlCj4gc29tZW9uZSBjb3VsZCBhc2sgd2hlcmUgdG8gcmVzdG9yZSB0aGUgcHJldmlvdXMg YXR0cmlidXRlIG9mIHBhZ2VzLgo+IAo+IFRoYW5rcy4KPiA+Pgo+ID4+Pj4gKwkJYXJjaF9rZXhl Y19wb3N0X2FsbG9jX3BhZ2VzKHBhZ2VfYWRkcmVzcyhwYWdlcyksIDEgPDwgb3JkZXIsIDApOwo+ ID4+Pj4gKwl9Cj4gPj4+PiAgCXJldHVybiBwYWdlczsKPiA+Pj4+ICB9Cj4gPj4+PiAgCj4gPj4+ PiBAQCAtODY1LDYgKzg3NSw3IEBAIHN0YXRpYyBpbnQga2ltYWdlX2xvYWRfY3Jhc2hfc2VnbWVu dChzdHJ1Y3Qga2ltYWdlICppbWFnZSwKPiA+Pj4+ICAJCQlyZXN1bHQgID0gLUVOT01FTTsKPiA+ Pj4+ICAJCQlnb3RvIG91dDsKPiA+Pj4+ICAJCX0KPiA+Pj4+ICsJCWFyY2hfa2V4ZWNfcG9zdF9h bGxvY19wYWdlcyhwYWdlX2FkZHJlc3MocGFnZSksIDEsIDApOwo+ID4+Pj4gIAkJcHRyID0ga21h cChwYWdlKTsKPiA+Pj4+ICAJCXB0ciArPSBtYWRkciAmIH5QQUdFX01BU0s7Cj4gPj4+PiAgCQlt Y2h1bmsgPSBtaW5fdChzaXplX3QsIG1ieXRlcywKPiA+Pj4+IEBAIC04ODIsNiArODkzLDcgQEAg c3RhdGljIGludCBraW1hZ2VfbG9hZF9jcmFzaF9zZWdtZW50KHN0cnVjdCBraW1hZ2UgKmltYWdl LAo+ID4+Pj4gIAkJCXJlc3VsdCA9IGNvcHlfZnJvbV91c2VyKHB0ciwgYnVmLCB1Y2h1bmspOwo+ ID4+Pj4gIAkJa2V4ZWNfZmx1c2hfaWNhY2hlX3BhZ2UocGFnZSk7Cj4gPj4+PiAgCQlrdW5tYXAo cGFnZSk7Cj4gPj4+PiArCQlhcmNoX2tleGVjX3ByZV9mcmVlX3BhZ2VzKHBhZ2VfYWRkcmVzcyhw YWdlKSwgMSk7Cj4gPj4+PiAgCQlpZiAocmVzdWx0KSB7Cj4gPj4+PiAgCQkJcmVzdWx0ID0gLUVG QVVMVDsKPiA+Pj4+ICAJCQlnb3RvIG91dDsKPiA+Pj4+IC0tIAo+ID4+Pj4gMi45LjUKPiA+Pj4+ Cj4gPj4+Pgo+ID4+Pj4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX18KPiA+Pj4+IGtleGVjIG1haWxpbmcgbGlzdAo+ID4+Pj4ga2V4ZWNAbGlzdHMuaW5mcmFk ZWFkLm9yZwo+ID4+Pj4gaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5m by9rZXhlYwo+IAo+IF9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fCj4ga2V4ZWMgbWFpbGluZyBsaXN0Cj4ga2V4ZWNAbGlzdHMuaW5mcmFkZWFkLm9yZwo+IGh0 dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8va2V4ZWMKCl9fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmtleGVjIG1haWxpbmcgbGlz dAprZXhlY0BsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21h aWxtYW4vbGlzdGluZm8va2V4ZWMK