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Wed, 21 Feb 2024 16:43:04 -0800 (PST) Received: from debug.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id bx12-20020a17090af48c00b0029a4089fbf0sm390177pjb.16.2024.02.21.16.43.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Feb 2024 16:43:04 -0800 (PST) Date: Wed, 21 Feb 2024 16:42:59 -0800 From: Deepak Gupta To: Mark Brown Cc: rick.p.edgecombe@intel.com, Szabolcs.Nagy@arm.com, kito.cheng@sifive.com, keescook@chromium.org, ajones@ventanamicro.com, paul.walmsley@sifive.com, palmer@dabbelt.com, conor.dooley@microchip.com, cleger@rivosinc.com, atishp@atishpatra.org, alex@ghiti.fr, bjorn@rivosinc.com, alexghiti@rivosinc.com, corbet@lwn.net, aou@eecs.berkeley.edu, oleg@redhat.com, akpm@linux-foundation.org, arnd@arndb.de, ebiederm@xmission.com, shuah@kernel.org, brauner@kernel.org, guoren@kernel.org, samitolvanen@google.com, evan@rivosinc.com, xiao.w.wang@intel.com, apatel@ventanamicro.com, mchitale@ventanamicro.com, waylingii@gmail.com, greentime.hu@sifive.com, heiko@sntech.de, jszhang@kernel.org, shikemeng@huaweicloud.com, david@redhat.com, charlie@rivosinc.com, panqinglin2020@iscas.ac.cn, willy@infradead.org, vincent.chen@sifive.com, andy.chiu@sifive.com, gerg@kernel.org, jeeheng.sia@starfivetech.com, mason.huo@starfivetech.com, ancientmodern4@gmail.com, mathis.salmen@matsal.de, cuiyunhui@bytedance.com, bhe@redhat.com, chenjiahao16@huawei.com, ruscur@russell.cc, bgray@linux.ibm.com, alx@kernel.org, baruch@tkos.co.il, zhangqing@loongson.cn, catalin.marinas@arm.com, revest@chromium.org, josh@joshtriplett.org, joey.gouly@arm.com, shr@devkernel.io, omosnace@redhat.com, ojeda@kernel.org, jhubbard@nvidia.com, linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [RFC PATCH v1 18/28] prctl: arch-agnostic prtcl for indirect branch tracking Message-ID: References: <20240125062739.1339782-1-debug@rivosinc.com> <20240125062739.1339782-19-debug@rivosinc.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240221_164308_290787_C51F438A X-CRM114-Status: UNSURE ( 8.20 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@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: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Tue, Feb 06, 2024 at 04:13:39PM +0000, Mark Brown wrote: >On Wed, Jan 24, 2024 at 10:21:43PM -0800, debug@rivosinc.com wrote: > >> To allow userspace to enable this feature for itself, following prtcls are >> defined: >> - PR_GET_INDIR_BR_LP_STATUS: Gets current configured status for indirect branch >> tracking. >> - PR_SET_INDIR_BR_LP_STATUS: Sets a configuration for indirect branch tracking >> Following status options are allowed >> - PR_INDIR_BR_LP_ENABLE: Enables indirect branch tracking on user >> thread. >> - PR_INDIR_BR_LP_DISABLE; Disables indirect branch tracking on user >> thread. >> - PR_LOCK_INDIR_BR_LP_STATUS: Locks configured status for indirect branch >> tracking for user thread. > >FWIW the arm64 BTI feature is enabled per page of executable memory >rather than in CPU state so it'd be hard for us to adopt this interface. >I don't think that's a blocker, just noting it. Got it, makes sense. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv