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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id mp8-20020a17090b190800b0020ad26fa65dsm284824pjb.56.2022.10.03.16.59.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Oct 2022 16:59:44 -0700 (PDT) Date: Mon, 3 Oct 2022 16:59:43 -0700 From: Kees Cook To: Rick Edgecombe Cc: x86@kernel.org, "H . Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H . J . Lu" , Jann Horn , Jonathan Corbet , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V . Shankar" , Weijiang Yang , "Kirill A . Shutemov" , joao.moreira@intel.com, John Allen , kcc@google.com, eranian@google.com, rppt@kernel.org, jamorris@linux.microsoft.com, dethoma@microsoft.com, Yu-cheng Yu Subject: Re: [OPTIONAL/RFC v2 37/39] x86/cet: Add PTRACE interface for CET Message-ID: <202210031658.EEC88324FD@keescook> References: <20220929222936.14584-1-rick.p.edgecombe@intel.com> <20220929222936.14584-38-rick.p.edgecombe@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220929222936.14584-38-rick.p.edgecombe@intel.com> ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1664841586; a=rsa-sha256; cv=none; b=usrcsC2a4ybQustVPfmw8qRu7YI/1HWUXMDoowJRMLYBEVe0O1sbLN8vbvh3zZ3iFW5wVB 2sxkH3RcUM0xRbdODk4mLWCiykiBIj48LA0yTQU4gpWZCgG8/xD8XnTcOYMk2eAsVq7VMA XnWqxhtTZ+y75X9kaGZ1lBzw5jr+FwM= ARC-Authentication-Results: i=1; imf06.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=U+gKP1h4; dmarc=pass (policy=none) header.from=chromium.org; spf=pass (imf06.hostedemail.com: domain of keescook@chromium.org designates 209.85.216.52 as permitted sender) smtp.mailfrom=keescook@chromium.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1664841586; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=RIJLKN8u3zDyFaSBgpFe42GEBZf7a4VcF4ED49hMdZc=; b=6nUgBNwtarMw0MsNiAAQXM09iAGqXqztcnA4g6fWlR+oJODs5rn+2aaNkuySDce6GmG+6C 1RLIFlFabaM8RFWeTjQESV38ppy7GLpiXbfBK1hiq0BZs6eXD20Gr+eAsPv7w7UjcmRDmS unc6u+8Rb9e0qZOYy58WNriRGK5+EX8= X-Rspam-User: Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=U+gKP1h4; dmarc=pass (policy=none) header.from=chromium.org; spf=pass (imf06.hostedemail.com: domain of keescook@chromium.org designates 209.85.216.52 as permitted sender) smtp.mailfrom=keescook@chromium.org X-Stat-Signature: ux1gwe3ajkufzp9x7s6wm9cby981zjpi X-Rspamd-Queue-Id: 4C1D1180011 X-Rspamd-Server: rspam09 X-HE-Tag: 1664841586-532167 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Sep 29, 2022 at 03:29:34PM -0700, Rick Edgecombe wrote: > From: Yu-cheng Yu > > Some applications (like GDB and CRIU) would like to tweak CET state via Eee. Does GDB really need this? Can we make this whole thing CONFIG-depend on CRIU? -- Kees Cook