From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Subject: Re: [Query] arm64: Right approach to support Image.gz file type via kexec_file_load() References: <9d54bb1e-7371-5163-69b0-0af0426ee4a0@redhat.com> <102e8c0a-d69a-81ee-5652-85a2b901230a@arm.com> <96b0ca14-48ad-ff15-8562-807893bc8124@redhat.com> From: James Morse Message-ID: <44aaa993-6896-99bc-48e1-6fb6a18cbb74@arm.com> Date: Mon, 24 Jun 2019 18:35:03 +0100 MIME-Version: 1.0 In-Reply-To: <96b0ca14-48ad-ff15-8562-807893bc8124@redhat.com> Content-Language: en-GB 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: Bhupesh Sharma Cc: Mark Rutland , Ard Biesheuvel , Catalin Marinas , matthewgarrett@google.com, Will Deacon , AKASHI Takahiro , Bhupesh SHARMA , "kexec@lists.infradead.org" , "linux-arm-kernel@lists.infradead.org" SGkgQmh1cGVzaCwKCk9uIDI0LzA2LzIwMTkgMDY6NTksIEJodXBlc2ggU2hhcm1hIHdyb3RlOgo+ IE9uIDA2LzIwLzIwMTkgMDg6NTggUE0sIEphbWVzIE1vcnNlIHdyb3RlOgo+PiBPbiAxOS8wNi8y MDE5IDIyOjIzLCBCaHVwZXNoIFNoYXJtYSB3cm90ZToKPj4+IFNpbmNlIG1vc3QgZGlzdHJpYnV0 aW9ucyB1c2UgJ21ha2Ugemluc3RhbGwnIHJ1bGUgaW5zaWRlICdhcmNoL2FybTY0L2Jvb3QvTWFr ZWZpbGUnIChzZWUKPj4+IFsxXSBmb3IgZGV0YWlscykgdG8gaW5zdGFsbCB0aGUgYXJtNjQgSW1h Z2UuZ3ogY29tcHJlc3NlZCBmaWxlIGluc2lkZSB0aGUgYm9vdCBkZXN0aW5hdGlvbgo+Pj4gZGly ZWN0b3J5IChmb3IgZS5nLiAvYm9vdCksIGN1cnJlbnRseSB3ZSBjYW5ub3QgdXNlIGtleGVjX2Zp bGVfbG9hZCgpIHRvIGxvYWQgdm1saW51eiAob3IKPj4+IEltYWdlLmd6KToKPj4KPj4gSXQncyBu b3QganVzdCBrZXhlY19maWxlX2xvYWQoKSwgd2UgZG9uJ3Qgc3VwcG9ydCBib290aW5nIGZyb20g Y29tcHJlc3NlZCBvciBlbGYgaW1hZ2UKPj4gZm9ybWF0cyBlaXRoZXI6IHRoZSBib290bG9hZGVy IGhhcyB0byBkZWNvbXByZXNzIGFueSBJbWFnZS5neiBiZWZvcmUgaXQgY2FuIHJ1biBpdC4KPiAK PiBUaGF0J3MgY29ycmVjdC4KPiAKPj4+IC4uLiBrZXJuZWwgcmV0dXJucyAtRUlOVkFMIGVycm9y IHZhbHVlLCBhcyBpdCBpcyBub3QgYWJsZSB0byBsb2NhdGUgdGhlIG1hZ2ljIG51bWJlcgo+Pj4g PTB4NjQ0ZDUyNDEsIHdoaWNoIGlzIGV4cGVjdGVkIGluIHRoZSA2NC1ieXRlIGhlYWRlciBvZiB0 aGUgZGVjb21wcmVzc2VkIGtlcm5lbCBpbWFnZQoKCj4+PiBUaGlzIHNlZW1zIHRvIGhhdmUgdGhl IGZvbGxvd2luZyBwcm9zIGFuZCBjb25zLCB3aGljaCBJIGNhbiB0aGluayBvZjoKPj4+Cj4+PiBQ cm9zOgo+Pj4gwqAgLSBDaGFuZ2VzIGNhbiBiZSBoYW5kbGVkIGluIHRoZSB1c2VyLXNwYWNlIChr ZXhlY190b29scykgYW5kIG5vIGNoYW5nZXMgYXJlIHJlcXVpcmVkIGluCj4+PiBrZXJuZWwgc3Bh Y2UgZm9yIGhhbmRsaW5nIHRoZSB1bnNpZ25lZC9ub24tc2VjdXJlIGJvb3QgY2FzZS4KPj4+Cj4+ PiBDb25zOgo+Pj4gwqAgLSBPbmUgb2J2aW91cyBpc3N1ZSBpcyBob3cgdG8gaGFuZGxlIHRoZSBz aWduZWQga2VybmVsIEltYWdlLmd6LCBiZWNhdXNlIHNpZ25hdHVyZQo+Pj4gdmVyaWZpY2F0aW9u IGlzIG1hbmFnZWQgaW5zaWRlIHRoZSBrZXJuZWwsIHNvIGhhbmRsaW5nIGEgc2lnbmVkIEltYWdl Lmd6IHdvdWxkIHJlcXVpcmUKPj4+IGtlcm5lbCBpbnRlcnZlbnRpb24gZXZlbnR1YWxseS4KCj4+ IEhvdyBkbyB5b3Ugc2lnbiBhbiBJbWFnZS5nej8gSXNuJ3QgdGhlIHNpZ25hdHVyZSB3cml0dGVu IGludG8gdGhlIFBFIGhlYWRlcj8KCj4gVGhhdCdzIGNvcnJlY3QsIG5vcm1hbGx5IGluIHVzZXIt bGFuZCBvbmUgdXNlcyBzdGFuZGFyZCBzaWduaW5nIHV0aWxpdGllcyBsaWtlIHRoZSBzYnNpZ24K PiB0b29scyAoc2VlIFsxXSkuIEZvciBleGFtcGxlIEkgdXNlIHRoZSBmb2xsb3dpbmcgbWV0aG9k IHRvIHNpZ24gdGhlIGRlY29tcHJlc3NlZCBrZXJuZWwKPiBJbWFnZToKPiAKPiAkIHNic2lnbiAt LWtleSAke0tFWX0gLS1jZXJ0ICR7Q0VSVH0gSW1hZ2UgLS1vdXRwdXQgSW1hZ2Uuc2lnbmVkCgp8 IG1vcnNlQGVnbG9uOn4va2VybmVsL2xpbnV4L2J1aWxkX2FybTY0JCBzYnNpZ24gLS1rZXkgY2Vy dHMvc2lnbmluZ19rZXkucGVtICAtLWNlcnQgXAp8ICAgY2VydHMvc2lnbmluZ19rZXkucGVtIGFy Y2gvYXJtNjQvYm9vdC9JbWFnZS5negp8IEludmFsaWQgRE9TIGhlYWRlciBtYWdpYwoKLi4uIGJl Y2F1c2UgdGhhdCBnemlwIGZpbGUgaXNuJ3QgYSBQRTMyKyB0aGF0IGNhbiBiZSBsb2FkZWQgYnkg VUVGSS4KCgo+IFRoZSBwcm9ibGVtIGhhcHBlbnMgd2hlbiB3ZSBoYXZlIGEgSW1hZ2UuZ3ogaW5z dGVhZCBvZiBhIGRlY29tcHJlc3NlZCBJbWFnZSBpbiBkaXN0cm8KPiBlbnZpcm9ubWVudHMuCj4g Cj4gTm93IHRoZSBwcm9jZXNzIGJlY29tZXMgYSBsb3QgbW9yZSBjb21wbGljYXRlZDoKPiAKPiAt IFVzZXIgdXNlcyBzYnNpZ24gdG9vbCB0byBzaWduIEltYWdlLmd6LCBsZXRzIGNhbGwgdGhlIHJl c3VsdGluZyBmaWxlIGFzIEltYWdlLmd6LnNpZ25lZAoKU2VjdXJlIEJvb3QgaXMgdGhlIHJlYXNv biBmb3IgYWxsIHRoaXMgc2lnbmF0dXJlIHN0dWZmLiBIYXZpbmcgb25seSBvbmUgd2F5IHRoZXNl IHRoaW5ncwpnZXQgc2lnbmVkIG1lYW5zIGl0IHdpbGwgd29yayBvbiBhbnkgcGxhdGZvcm0gdGhh dCBzdXBwb3J0cyBzaWduYXR1cmVzLiBTdXBwb3J0aW5nCm11bHRpcGxlIGZvcm1hdHMgbWVhbnMg cG90ZW50aWFsbHkgbXVsdGlwbGUsIGNvbmZsaWN0aW5nLCBzaWduYXR1cmVzLgoKCkltYWdlLmd6 IGlzbid0IGEgUEUzMisgZmlsZSwgc28gd2hlcmV2ZXIgc2JzaWduIHB1dHMgdGhlIHNpZ25hdHVy ZSwgaXQgaXNuJ3Qgc29tZXdoZXJlIHRoZQprZXJuZWwgb3IgVUVGSSBrbm93IGhvdyB0byB2YWxp ZGF0ZSBpdC4KCgo+IC0ga2V4ZWNfZmlsZV9sb2FkKCkgaXMgaW52b2tlZCB1c2luZyBhIGNvbW1h bmQgbGluZSByZXNlbWJsaW5nIHNvbWV0aGluZyBsaWtlOgo+IAo+ICQga2V4ZWMgLXMgLWwgSW1h Z2UuZ3ouc2lnbmVkIC0taW5pdHJkPS9ib290L2luaXRyYW1mcy1gdW5hbWUgLXJgLmltZyAtLXJl dXNlLWNtZGxpbmUKPiAKPiAtIE5vdyBzaW5jZSBrZXhlY190b29scyAodXNlciBsYW5kKSBoYXMg bm8gc3VwcG9ydCBmb3IgcGFyc2luZyB0aGUgc2lnbmF0dXJlIGFwcGVuZGVkCj4gYmVmb3JlIHRo ZSBJbWFnZS5neiBmaWxlICh1c2luZyB3aGljaCBpdCBjcmVhdGVzIGEgZGVjb21wcmVzc2VkIElt YWdlIGZpbGUpIGFuZCB0aGVuIHRvCj4gcmUtc2lnbiB0aGUgcmVzdWx0aW5nIEltYWdlIGZpbGUg KGJlZm9yZSBpdCBpcyBwYXNzZWQgYXMgYSBmZCB0byB0aGUgc3lzY2FsbCksIEkgYW0gbm90Cj4g c3VyZSBob3cgdGhpcyBjYW4gYmUgaGFuZGxlZCBpbiB1c2VyLWxhbmQgYXBwcm9wcmlhdGVseS4K ClN1cmVseSB0aGUgcmlnaHQgdGhpbmcgdG8gZG8gaGVyZSBpcyB1bnppcCB0aGUgZmlsZSwgc2ln biBpdCwgcmUtY29tcHJlc3MgaXQuCkl0IGhhcyBiZWVuIGNvbXByZXNzZWQgdG8gc2F2ZSBzcGFj ZS4gVGhlIGJvb3Rsb2FkZXIvZ3J1YiBoYXMgdG8gdW5jb21wcmVzcyBpdCBiZWZvcmUgaWYKY2Fu IGdldCBnZXQgVUVGSSB0byBib290IGl0LgpJJ20gcHJldHR5IHN1cmUgeW91IGNhbid0IHBvaW50 IHRoZSBlZmkgYm9vdCB2YXJpYWJsZXMgYXQgYSBnemlwIGZpbGUuCgooVUVGSSBoYXMgaXRzIG93 biBjb21wcmVzc2lvbiBzY2hlbWUgaW4gYXBwZW5kaXggSCwgSSBjYW4ndCBmaW5kIGFueSBtZW50 aW9uIG9mIGd6aXAgaW4KdGhlIHNwZWMpCgoKPj4+IDIuIEFkZCBzdXBwb3J0IGluIGtlcm5lbCAo Zm9yIHdoaWNoIEkgaGF2ZSBhIFJGQyBwYXRjaCByZWFkeSksIHdoaWNoIGhhbmRsZXMgYW4gJ0lt YWdlLmd6Jwo+Pj4gYmVpbmcgcGFzc2VkIHZpYSBrZXhlY19maWxlX2xvYWQoKSwgdXNpbmcgYW4g YXBwcm9hY2ggYXMgZm9sbG93czoKPj4+Cj4+PiBhKS4gRGVmaW5lIGEgJ2FyY2hfa2V4ZWNfa2Vy bmVsX2ltYWdlX3Byb2JlJyBmb3IgYXJtNjQsIHdoaWNoIG92ZXJyaWRlcyB0aGUgX193ZWFrCj4+ PiBkZWZpbml0aW9uIGluICdrZXJuZWwva2V4ZWNfZmlsZS5jJwo+Pj4gYikuIEluc2lkZSAnYXJj aF9rZXhlY19rZXJuZWxfaW1hZ2VfcHJvYmUnIGZvciBhcm02NCwgY2hlY2sgaWYgd2UgaGF2ZSBi ZWVuIHBhc3NlZCBhCj4+PiBtYWdpYyBoZWFkZXLCoCAweDFmLCAweDhiIChcMDM3IFwyMTMpIHdo aWNoIGluZGljYXRlcyBhICdnemlwIGZvcm1hdCcgSW1hZ2UgZmlsZS4KPj4+IGIpLiBEZWNvbXBy ZXNzIHRoZSBjb250ZW50cyBpbnNpZGUgYSBidWZmZXIgdXNpbmcgYSBkZWNvbXByZXNzX2tlcm5l bCgpIC0+IGd1bnppcCgpIC0+Cj4+PiBpbmZsYXRlKCkgbG9naWMuCj4+Pgo+Pj4gVGhpcyBzZWVt cyB0byBoYXZlIHRoZSBmb2xsb3dpbmcgcHJvcyBhbmQgY29ucywgd2hpY2ggSSBjYW4gdGhpbmsg b2Y6Cj4+Pgo+Pj4gUHJvczoKPj4+IMKgIC0gSGFuZGxpbmcgc2lnbmVkIEltYWdlLmd6IGJlY29t ZXMgZWFzaWVyIGluIHRoZSBrZXJuZWwgaXRzZWxmLgo+Pgo+PiBJIGRvbid0IGZvbGxvdzogeW91 IGNhbid0IGJvb3QgdGhpcywgc28gd2h5IHdvdWxkIHlvdSBzaWduIGl0Pwo+IAo+IAo+IEJlY2F1 c2UgdGhhdCdzIHdoYXQgbW9zdCBkaXN0cmlidXRpb25zIGRvIG5vcm1hbGx5IChJIHNoYXJlIHNv bWUgc2lnbmluZwo+IHJ1bGVzIGFzIGEgcmVmZXJlbmNlIGJlbG93KSAtIGlmIHRoZSBnemlwcGVk IEVGSSBpbWFnZXMgYXJlIHByZXNlbnQgdGhlbiB0aGV5IHNpZ24gdGhlbSB2aWEKPiBwZXNpZ24g dG9vbCAoc2VlIDxodHRwOi8vbWFucGFnZXMudWJ1bnR1LmNvbS9tYW5wYWdlcy9iaW9uaWMvbWFu MS9wZXNpZ24uMS5odG1sPikKCkRvIHRoZXkgZXhwZWN0IHBsYXRmb3JtIGZpcm13YXJlIHRvIGJv b3QgdGhlc2U/IEl0IGRvZXNuJ3Qgd29yayBmb3IgbWU6CnwgRlMwOlw+IEltYWdlLmd6CnwgVW5s b2FkaW5nIGRyaXZlciBhdCAweDAwMDAwMDAwMDAwCnwgRXJyb3IgcmVwb3J0ZWQ6IFVuc3VwcG9y dGVkCnwgRlMwOlw+IEltYWdlCnwgTG9hZGluZyBkcml2ZXIgYXQgMHgwODdGOTE4MDAwMCBFbnRy eVBvaW50PTB4MDg3RkE0NDVGOTgKfCBFRkkgc3R1YjogQm9vdGluZyBMaW51eCBLZXJuZWwuLi4K Ckl0J3MgZ3J1YidzIGd6aXAgbW9kdWxlIHRoYXQgZG9lcyB0aGUgZGVjb21wcmVzc2lvbi4gSW4g dGhlIHNhbWUgd2F5IHdlIGV4cGVjdCBrZXhlYy10b29scwp0byBkZWNvbXByZXNzIHRoZSBibG9i IHRvIGZlZWQga2V4ZWNfZmlsZV9sb2FkIHRoZSBrZXJuZWwgSW1hZ2UuCgpJZiB5b3UgZGVjb21w cmVzcyB0aGUgSW1hZ2UuZ3osIHNpZ24gaXQsIHJlLWNvbXByZXNzIGl0IGl0IHNob3VsZCBhbGwg anVzdCB3b3JrLgoKClRoYW5rcywKCkphbWVzCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwprZXhlYyBtYWlsaW5nIGxpc3QKa2V4ZWNAbGlzdHMuaW5mcmFk ZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2tleGVj Cg==