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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CAF1FC65C30 for ; Sun, 7 Oct 2018 06:09:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 830D52088F for ; Sun, 7 Oct 2018 06:09:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 830D52088F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727856AbeJGNPz (ORCPT ); Sun, 7 Oct 2018 09:15:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58036 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726308AbeJGNPy (ORCPT ); Sun, 7 Oct 2018 09:15:54 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9DAC93082E4B; Sun, 7 Oct 2018 06:09:43 +0000 (UTC) Received: from localhost.localdomain (ovpn-12-18.pek2.redhat.com [10.72.12.18]) by smtp.corp.redhat.com (Postfix) with ESMTPS id BA84F36FA; Sun, 7 Oct 2018 06:09:29 +0000 (UTC) Subject: Re: [PATCH v8 RESEND 0/4] Support kdump for AMD secure memory encryption(SME) To: Borislav Petkov Cc: linux-kernel@vger.kernel.org, kexec@lists.infradead.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, akpm@linux-foundation.org, dan.j.williams@intel.com, thomas.lendacky@amd.com, bhelgaas@google.com, baiyaowei@cmss.chinamobile.com, tiwai@suse.de, brijesh.singh@amd.com, dyoung@redhat.com, bhe@redhat.com, jroedel@suse.de References: <20180930031033.22110-1-lijiang@redhat.com> <20181002114012.GB29859@zn.tnic> <43da68b1-fda0-c033-39e1-907d01f13354@redhat.com> <20181003113435.GB4436@zn.tnic> <20181004190221.GA17667@zn.tnic> <0d1c112c-37b7-ee9d-b3d6-6d8e3df02d78@redhat.com> <20181006095627.GA30555@zn.tnic> From: lijiang Message-ID: <1ae4de5d-4857-4804-10ae-d415e79d861e@redhat.com> Date: Sun, 7 Oct 2018 14:09:25 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20181006095627.GA30555@zn.tnic> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.46]); Sun, 07 Oct 2018 06:09:43 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 在 2018年10月06日 17:56, Borislav Petkov 写道: > On Fri, Oct 05, 2018 at 01:52:26PM +0800, lijiang wrote: >> b. add the parameter "mem_encrypt=on" for kernel command-line to grub.cfg, if >> this machine has SME feature. And also add crashkernel=xx, which will reserve >> memory for kdump. > > Ok, I'm doing the simpler crashkernel= cmdline: > > crashkernel=256M > > That says: > > [ 0.011918] Reserving 256MB of memory at 640MB for crashkernel (System RAM: 262030MB) > >> Step 5: reboot, and then load the crash kernel image and kdump initramfs. >> >> a: When SME is enabled, i use this command to load them: >> >> #kexec -p /boot/vmlinuz-4.19.0-rc6+ --initrd=/boot/initramfs-4.19.0-rc6+kdump.img --command-line="root=/dev/mapper/rhel_hp--dl385g10--03-root ro rd.lvm.lv=rhel_hp-dl385g10-03/root rd.lvm.lv=rhel_hp-dl385g10-03/swap mem_encrypt=on console=ttyS0,115200n81 LANG=en_US.UTF-8 earlyprintk=serial debug irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug transparent_hugepage=never disable_cpu_apicid=0" > > Ok, did that, my cmdline is: > > ~/bpetkov/src/kexec-tools/build/sbin/kexec -p /boot/vmlinuz-4.19.0-rc6+ --initrd=/boot/initrd-4.19.0-rc6+ --command-line="root=/dev/mapper/ubuntu--010236012132--vg-leap15 rd.lvm.lv=ubuntu--010236012132--vg-leap15/root rd.lvm.lv=ubuntu--010236012132--vg-leap15/swap splash=silent showopts console=ttyS5,115200 console=tty0 debug ignore_loglevel log_buf_len=16M nr_cpus=1 irqpoll maxcpus=1 reset_devices vga=normal mem_encrypt=on LANG=en_US.UTF-8 earlyprintk=serial cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug transparent_hugepage=never disable_cpu_apicid=0" > > Verified it loaded ok: > > $ grep . /sys/kernel/kexec_* > /sys/kernel/kexec_crash_loaded:1 > /sys/kernel/kexec_crash_size:268435456 > /sys/kernel/kexec_loaded:0 > >> Step 6: trigger panic by sysrq >> #echo c > /proc/sysrq-trigger > > Did that and I got into the kdump kernel with SME. So I'd guess your kdump > kernel command line was needed - I was missing a bunch of switches and > remote-debugging a box kexecing is not fun. > > So thanks a lot for the detailed steps, I'm putting them to my notes. > It's my pleasure. Also thanks for your patience and help. Regards, Lianbo 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 1g92GK-0000Bq-04 for kexec@lists.infradead.org; Sun, 07 Oct 2018 06:09:57 +0000 Subject: Re: [PATCH v8 RESEND 0/4] Support kdump for AMD secure memory encryption(SME) References: <20180930031033.22110-1-lijiang@redhat.com> <20181002114012.GB29859@zn.tnic> <43da68b1-fda0-c033-39e1-907d01f13354@redhat.com> <20181003113435.GB4436@zn.tnic> <20181004190221.GA17667@zn.tnic> <0d1c112c-37b7-ee9d-b3d6-6d8e3df02d78@redhat.com> <20181006095627.GA30555@zn.tnic> From: lijiang Message-ID: <1ae4de5d-4857-4804-10ae-d415e79d861e@redhat.com> Date: Sun, 7 Oct 2018 14:09:25 +0800 MIME-Version: 1.0 In-Reply-To: <20181006095627.GA30555@zn.tnic> Content-Language: en-US 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: Borislav Petkov 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 5ZyoIDIwMTjlubQxMOaciDA25pelIDE3OjU2LCBCb3Jpc2xhdiBQZXRrb3Yg5YaZ6YGTOgo+IE9u IEZyaSwgT2N0IDA1LCAyMDE4IGF0IDAxOjUyOjI2UE0gKzA4MDAsIGxpamlhbmcgd3JvdGU6Cj4+ ICAgICAgYi4gYWRkIHRoZSBwYXJhbWV0ZXIgIm1lbV9lbmNyeXB0PW9uIiBmb3Iga2VybmVsIGNv bW1hbmQtbGluZSB0byBncnViLmNmZywgaWYKPj4gICAgICAgICB0aGlzIG1hY2hpbmUgaGFzIFNN RSBmZWF0dXJlLiBBbmQgYWxzbyBhZGQgY3Jhc2hrZXJuZWw9eHgsIHdoaWNoIHdpbGwgcmVzZXJ2 ZQo+PiAgICAgICAgIG1lbW9yeSBmb3Iga2R1bXAuCj4gCj4gT2ssIEknbSBkb2luZyB0aGUgc2lt cGxlciBjcmFzaGtlcm5lbD0gY21kbGluZToKPiAKPiBjcmFzaGtlcm5lbD0yNTZNCj4gCj4gVGhh dCBzYXlzOgo+IAo+IFsgICAgMC4wMTE5MThdIFJlc2VydmluZyAyNTZNQiBvZiBtZW1vcnkgYXQg NjQwTUIgZm9yIGNyYXNoa2VybmVsIChTeXN0ZW0gUkFNOiAyNjIwMzBNQikKPiAKPj4gU3RlcCA1 OiByZWJvb3QsIGFuZCB0aGVuIGxvYWQgdGhlIGNyYXNoIGtlcm5lbCBpbWFnZSBhbmQga2R1bXAg aW5pdHJhbWZzLgo+Pgo+PiAgICAgIGE6IFdoZW4gU01FIGlzIGVuYWJsZWQsIGkgdXNlIHRoaXMg Y29tbWFuZCB0byBsb2FkIHRoZW06Cj4+Cj4+ICAgICAgICAgI2tleGVjIC1wIC9ib290L3ZtbGlu dXotNC4xOS4wLXJjNisgLS1pbml0cmQ9L2Jvb3QvaW5pdHJhbWZzLTQuMTkuMC1yYzYra2R1bXAu aW1nIC0tY29tbWFuZC1saW5lPSJyb290PS9kZXYvbWFwcGVyL3JoZWxfaHAtLWRsMzg1ZzEwLS0w My1yb290IHJvIHJkLmx2bS5sdj1yaGVsX2hwLWRsMzg1ZzEwLTAzL3Jvb3QgcmQubHZtLmx2PXJo ZWxfaHAtZGwzODVnMTAtMDMvc3dhcCBtZW1fZW5jcnlwdD1vbiBjb25zb2xlPXR0eVMwLDExNTIw MG44MSBMQU5HPWVuX1VTLlVURi04IGVhcmx5cHJpbnRrPXNlcmlhbCBkZWJ1ZyBpcnFwb2xsIG5y X2NwdXM9MSByZXNldF9kZXZpY2VzIGNncm91cF9kaXNhYmxlPW1lbW9yeSBtY2U9b2ZmIG51bWE9 b2ZmIHVkZXYuY2hpbGRyZW4tbWF4PTIgcGFuaWM9MTAgcm9vdGZsYWdzPW5vZmFpbCBhY3BpX25v X21lbWhvdHBsdWcgdHJhbnNwYXJlbnRfaHVnZXBhZ2U9bmV2ZXIgZGlzYWJsZV9jcHVfYXBpY2lk PTAiCj4gCj4gT2ssIGRpZCB0aGF0LCBteSBjbWRsaW5lIGlzOgo+IAo+IH4vYnBldGtvdi9zcmMv a2V4ZWMtdG9vbHMvYnVpbGQvc2Jpbi9rZXhlYyAtcCAvYm9vdC92bWxpbnV6LTQuMTkuMC1yYzYr IC0taW5pdHJkPS9ib290L2luaXRyZC00LjE5LjAtcmM2KyAtLWNvbW1hbmQtbGluZT0icm9vdD0v ZGV2L21hcHBlci91YnVudHUtLTAxMDIzNjAxMjEzMi0tdmctbGVhcDE1IHJkLmx2bS5sdj11YnVu dHUtLTAxMDIzNjAxMjEzMi0tdmctbGVhcDE1L3Jvb3QgcmQubHZtLmx2PXVidW50dS0tMDEwMjM2 MDEyMTMyLS12Zy1sZWFwMTUvc3dhcCBzcGxhc2g9c2lsZW50IHNob3dvcHRzIGNvbnNvbGU9dHR5 UzUsMTE1MjAwIGNvbnNvbGU9dHR5MCBkZWJ1ZyBpZ25vcmVfbG9nbGV2ZWwgbG9nX2J1Zl9sZW49 MTZNIG5yX2NwdXM9MSBpcnFwb2xsIG1heGNwdXM9MSByZXNldF9kZXZpY2VzIHZnYT1ub3JtYWwg bWVtX2VuY3J5cHQ9b24gTEFORz1lbl9VUy5VVEYtOCBlYXJseXByaW50az1zZXJpYWwgY2dyb3Vw X2Rpc2FibGU9bWVtb3J5IG1jZT1vZmYgbnVtYT1vZmYgdWRldi5jaGlsZHJlbi1tYXg9MiBwYW5p Yz0xMCByb290ZmxhZ3M9bm9mYWlsIGFjcGlfbm9fbWVtaG90cGx1ZyB0cmFuc3BhcmVudF9odWdl cGFnZT1uZXZlciBkaXNhYmxlX2NwdV9hcGljaWQ9MCIKPiAKPiBWZXJpZmllZCBpdCBsb2FkZWQg b2s6Cj4gCj4gJCBncmVwIC4gL3N5cy9rZXJuZWwva2V4ZWNfKgo+IC9zeXMva2VybmVsL2tleGVj X2NyYXNoX2xvYWRlZDoxCj4gL3N5cy9rZXJuZWwva2V4ZWNfY3Jhc2hfc2l6ZToyNjg0MzU0NTYK PiAvc3lzL2tlcm5lbC9rZXhlY19sb2FkZWQ6MAo+IAo+PiBTdGVwIDY6IHRyaWdnZXIgcGFuaWMg Ynkgc3lzcnEKPj4gICAgICAgICAjZWNobyBjID4gL3Byb2Mvc3lzcnEtdHJpZ2dlcgo+IAo+IERp ZCB0aGF0IGFuZCBJIGdvdCBpbnRvIHRoZSBrZHVtcCBrZXJuZWwgd2l0aCBTTUUuIFNvIEknZCBn dWVzcyB5b3VyIGtkdW1wCj4ga2VybmVsIGNvbW1hbmQgbGluZSB3YXMgbmVlZGVkIC0gSSB3YXMg bWlzc2luZyBhIGJ1bmNoIG9mIHN3aXRjaGVzIGFuZAo+IHJlbW90ZS1kZWJ1Z2dpbmcgYSBib3gg a2V4ZWNpbmcgaXMgbm90IGZ1bi4KPiAKPiBTbyB0aGFua3MgYSBsb3QgZm9yIHRoZSBkZXRhaWxl ZCBzdGVwcywgSSdtIHB1dHRpbmcgdGhlbSB0byBteSBub3Rlcy4KPiAKCkl0J3MgbXkgcGxlYXN1 cmUuCkFsc28gdGhhbmtzIGZvciB5b3VyIHBhdGllbmNlIGFuZCBoZWxwLgoKUmVnYXJkcywKTGlh bmJvCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwprZXhl YyBtYWlsaW5nIGxpc3QKa2V4ZWNAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5m cmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2tleGVjCg==