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Tue, 11 Jul 2023 19:19:00 +0000 (GMT) Message-ID: <4ccfe980-3c71-fa06-59e4-56c85d798224@linux.ibm.com> Date: Tue, 11 Jul 2023 15:19:00 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0 Subject: Re: [PATCH 05/10] kexec: implement functions to map and unmap segment to kimage Content-Language: en-US To: Tushar Sugandhi , zohar@linux.ibm.com, noodles@fb.com, bauermann@kolabnow.com, kexec@lists.infradead.org, linux-integrity@vger.kernel.org Cc: code@tyhicks.com, nramas@linux.microsoft.com, paul@paul-moore.com, Eric Biederman References: <20230703215709.1195644-1-tusharsu@linux.microsoft.com> <20230703215709.1195644-6-tusharsu@linux.microsoft.com> <7f38366e-744e-78c8-cf05-acfeb59afd2e@linux.microsoft.com> From: Stefan Berger In-Reply-To: <7f38366e-744e-78c8-cf05-acfeb59afd2e@linux.microsoft.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: wmAJvMX1CPk8iauTbt6u4lwrYTXMyusH X-Proofpoint-ORIG-GUID: wmAJvMX1CPk8iauTbt6u4lwrYTXMyusH X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-11_11,2023-07-11_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxlogscore=921 clxscore=1011 mlxscore=0 suspectscore=0 bulkscore=0 impostorscore=0 adultscore=0 malwarescore=0 priorityscore=1501 phishscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307110172 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230711_121918_991849_1DC11772 X-CRM114-Status: GOOD ( 26.37 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org CgpPbiA3LzExLzIzIDE0OjQxLCBUdXNoYXIgU3VnYW5kaGkgd3JvdGU6Cj4gQWRkaW5nIEVyaWMg dG8gY2MuCj4gCj4gT24gNy83LzIzIDA1OjI4LCBTdGVmYW4gQmVyZ2VyIHdyb3RlOgo+Pgo+Pgo+ PiBPbiA3LzMvMjMgMTc6NTcsIFR1c2hhciBTdWdhbmRoaSB3cm90ZToKPj4+IEN1cnJlbnRseSwg dGhlcmUncyBubyBtZWNoYW5pc20gdG8gbWFwIGFuZCB1bm1hcCBzZWdtZW50cyB0byB0aGUga2lt YWdlCj4+PiBzdHJ1Y3R1cmUuwqAgVGhpcyBmdW5jdGlvbmFsaXR5IGlzIG5lZWRlZCB3aGVuIGRl YWxpbmcgd2l0aCBtZW1vcnkgc2VnbWVudHMKPj4+IGluIHRoZSBjb250ZXh0IG9mIGEga2V4ZWMg b3BlcmF0aW9uLgo+Pj4KPj4+IFRoZSBwYXRjaCBhZGRzIHR3byBuZXcgZnVuY3Rpb25zOiBraW1h Z2VfbWFwX3NlZ21lbnQoKSBhbmQKPj4+IGtpbWFnZV91bm1hcF9zZWdtZW50KCkuCj4+Pgo+Pj4g SW1wbGVtZW50IGtpbWFnZV9tYXBfc2VnbWVudCgpIHdoaWNoIHRha2VzIGEga2ltYWdlIHBvaW50 ZXIsIGFuIGFkZHJlc3MsCj4+PiBhbmQgYSBzaXplLsKgIEVuc3VyZXMgdGhhdCB0aGUgZW50aXJl IHNlZ21lbnQgaXMgYmVpbmcgbWFwcGVkIGJ5IGNvbXBhcmluZwo+Pj4gdGhlIGdpdmVuIGFkZHJl c3MgYW5kIHNpemUgdG8gZWFjaCBzZWdtZW50IGluIHRoZSBraW1hZ2UncyBzZWdtZW50IGFycmF5 Lgo+Pj4gQ29sbGVjdCB0aGUgc291cmNlIHBhZ2VzIHRoYXQgY29ycmVzcG9uZCB0byB0aGUgZ2l2 ZW4gYWRkcmVzcyByYW5nZSwKPj4+IGFsbG9jYXRlIGFuIGFycmF5IG9mIHBvaW50ZXJzIHRvIHRo ZXNlIHBhZ2VzLCBhbmQgbWFwIHRoZW0gdG8gYSBjb250aWd1b3VzCj4+PiByYW5nZSBvZiB2aXJ0 dWFsIGFkZHJlc3Nlcy7CoCBJZiB0aGUgbWFwcGluZyBvcGVyYXRpb24gaXMgc3VjY2Vzc2Z1bCwg dGhlCj4+PiBmdW5jdGlvbiByZXR1cm5zIHRoZSBzdGFydCBvZiB0aGlzIHJhbmdlLsKgIE90aGVy d2lzZSwgaXQgZnJlZXMgdGhlIHBhZ2UKPj4+IHBvaW50ZXIgYXJyYXkgYW5kIHJldHVybnMgTlVM TC4KPj4+Cj4+PiBJbXBsZW1lbnQga2ltYWdlX3VubWFwX3NlZ21lbnQoKSB0aGF0IHRha2VzIGEg cG9pbnRlciB0byBhIHNlZ21lbnQgYnVmZmVyCj4+PiBhbmQgdW5tYXBzIGl0IHVzaW5nIHZ1bm1h cCgpLgo+Pj4KPj4+IEZpbmFsbHksIG1vdmUgZm9yX2VhY2hfa2ltYWdlX2VudHJ5KCkgbWFjcm8g dG8ga2V4ZWMuaC4KPj4+Cj4+PiBOb3RlOiBVc2Uga2ltYWdlX21hcF9zZWdtZW50KCkgYW5kIGtp bWFnZV91bm1hcF9zZWdtZW50KCkgY2FyZWZ1bGx5IHRvCj4+PiBhdm9pZCBtZW1vcnkgbGVha3Mg YW5kIGVuc3VyZSB0aGF0IGFsbCBtYXBwZWQgc2VnbWVudHMgYXJlIHByb3Blcmx5Cj4+PiB1bm1h cHBlZCB3aGVuIHRoZXkncmUgbm8gbG9uZ2VyIG5lZWRlZC4KPj4+Cj4+PiBTaWduZWQtb2ZmLWJ5 OiBUdXNoYXIgU3VnYW5kaGkgPHR1c2hhcnN1QGxpbnV4Lm1pY3Jvc29mdC5jb20+Cj4+Cj4+PiAr Cj4+PiArwqDCoMKgIGkgPSAwOwo+Pj4gK8KgwqDCoCBmb3JfZWFjaF9raW1hZ2VfZW50cnkoaW1h Z2UsIHB0ciwgZW50cnkpIHsKPj4+ICvCoMKgwqDCoMKgwqDCoCBpZiAoZW50cnkgJiBJTkRfREVT VElOQVRJT04pCj4+PiArwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBkZXN0X3BhZ2VfYWRkciA9IGVu dHJ5ICYgUEFHRV9NQVNLOwo+Pj4gK8KgwqDCoMKgwqDCoMKgIGVsc2UgaWYgKGVudHJ5ICYgSU5E X1NPVVJDRSkgewo+Pj4gK8KgwqDCoMKgwqDCoMKgwqDCoMKgwqAgaWYgKGRlc3RfcGFnZV9hZGRy ID49IGFkZHIgJiYgZGVzdF9wYWdlX2FkZHIgPCBlYWRkcikgewo+Pj4gK8KgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoCBzcmNfcGFnZV9hZGRyID0gZW50cnkgJiBQQUdFX01BU0s7Cj4+PiAr wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHNyY19wYWdlc1tpKytdID0gcGh5c190b19w YWdlKHNyY19wYWdlX2FkZHIpOwo+Pgo+PiBTaW5jZSBwaHlzX3RvX3BhZ2UgaXMgbm90IGRlZmlu ZWQgb24gbWFueS9tb3N0IGFyY2hpdGVjdHVyZXMgSSBjaGFuZ2UgaXQgZm9yIHBwYzY0IGFuZCBo YXZlIHN1Y2Nlc3NmdWxseSB1c2VkIHRoZSBmb2xsb3dpbmc6Cj4+Cj4+ICvCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgc3JjX3BhZ2Vz W2krK10gPSB2aXJ0X3RvX3BhZ2UoX192YShzcmNfcGFnZV9hZGRyKSkKPj4KPj4KPj4gQWZ0ZXIg c2V2ZXJhbCBrZXhlY3MgdGhlIGZvbGxvd2luZyBjaGVjayBzdGlsbCB3b3JrczoKPj4KPj4gIyBl dm1jdGwgaW1hX21lYXN1cmVtZW50IC0taWdub3JlLXZpb2xhdGlvbnMgL3N5cy9rZXJuZWwvc2Vj dXJpdHkvaW1hL2JpbmFyeV9ydW50aW1lX21lYXN1cmVtZW50cwo+PiBNYXRjaGVkIHBlciBUUE0g YmFuayBjYWxjdWxhdGVkIGRpZ2VzdChzKS4KPj4KPj4KPj4gwqDCoCBTdGVmYW4KPiBUaGFuayB5 b3Ugc28gbXVjaCBTdGVmYW4gZm9yIHJldmlld2luZyB0aGlzIHNlcmllcywgYW5kIGNhdGNoaW5n IHRoaXMKPiBpc3N1ZS7CoCBBcmUgeW91IHN1Z2dlc3RpbmcgSSBzaG91bGQgdXNlIHZpcnRfdG9f cGFnZSBvbiBhbGwgYXJjaGl0ZWN0dXJlcwo+IHVuY29uZGl0aW9uYWxseSwgb3IgdXNlIGl0IG9u bHkgd2hlbiBwaHlzX3RvX3BhZ2UgaXMgbm90IGF2YWlsYWJsZT8KCkkgd291bGQgdHJ5IHRvIHVz ZWQgaXQgb24gYWxsIGFyY2hpdGVjdHVyZXMuCgogICAgU3RlZmFuCgo+IAo+IH5UdXNoYXIKPiAK PiBfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwo+IGtleGVj IG1haWxpbmcgbGlzdAo+IGtleGVjQGxpc3RzLmluZnJhZGVhZC5vcmcKPiBodHRwOi8vbGlzdHMu aW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2tleGVjCgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwprZXhlYyBtYWlsaW5nIGxpc3QKa2V4ZWNAbGlz dHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3Rp bmZvL2tleGVjCg==