lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 9 Aug 2017 11:24:07 +0200 From: Juergen Gross <jgross@...e.com> To: Peter Zijlstra <peterz@...radead.org> Cc: Andy Lutomirski <luto@...nel.org>, Josh Poimboeuf <jpoimboe@...hat.com>, Linus Torvalds <torvalds@...ux-foundation.org>, "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>, "x86@...nel.org" <x86@...nel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "live-patching@...r.kernel.org" <live-patching@...r.kernel.org>, Jiri Slaby <jslaby@...e.cz>, Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>, Mike Galbraith <efault@....de> Subject: Re: [PATCH v4 1/2] x86/unwind: add ORC unwinder On 09/08/17 11:16, Peter Zijlstra wrote: > On Wed, Aug 09, 2017 at 10:49:43AM +0200, Juergen Gross wrote: >>> ALTERNATIVE "pushfq; popq %rax", "callq *pv_irq_ops.save_fl", >>> X86_FEATURE_GODDAMN_PV_IRQ_OPS >> >> You are aware that at least some of the Xen irq pvops functionality is >> patched inline? Your modification would slow down pv guests quite a >> bit, I guess. > > Where does that live? I know of the inline patching for native, but > didn't know the guests did any of that too. See arch/x86/xen/enlighten_pv.c xen_patch(). Juergen
Powered by blists - more mailing lists