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[2003:cb:c743:de00:7030:120f:d1c9:4c3c]) by smtp.gmail.com with ESMTPSA id j15-20020a05600c190f00b004162b7af645sm2464176wmq.10.2024.04.04.12.15.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 04 Apr 2024 12:15:41 -0700 (PDT) Message-ID: <604863a6-0387-4f29-9c4e-5ef86a8ca904@redhat.com> Date: Thu, 4 Apr 2024 21:15:38 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 08/29] mm: Define VM_SHADOW_STACK for RISC-V To: Mark Brown Cc: Deepak Gupta , paul.walmsley@sifive.com, rick.p.edgecombe@intel.com, Szabolcs.Nagy@arm.com, kito.cheng@sifive.com, keescook@chromium.org, ajones@ventanamicro.com, conor.dooley@microchip.com, cleger@rivosinc.com, atishp@atishpatra.org, alex@ghiti.fr, bjorn@rivosinc.com, alexghiti@rivosinc.com, samuel.holland@sifive.com, conor@kernel.org, linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, corbet@lwn.net, palmer@dabbelt.com, aou@eecs.berkeley.edu, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, oleg@redhat.com, akpm@linux-foundation.org, arnd@arndb.de, ebiederm@xmission.com, Liam.Howlett@oracle.com, vbabka@suse.cz, lstoakes@gmail.com, shuah@kernel.org, brauner@kernel.org, andy.chiu@sifive.com, jerry.shih@sifive.com, hankuan.chen@sifive.com, greentime.hu@sifive.com, evan@rivosinc.com, xiao.w.wang@intel.com, charlie@rivosinc.com, apatel@ventanamicro.com, mchitale@ventanamicro.com, dbarboza@ventanamicro.com, sameo@rivosinc.com, shikemeng@huaweicloud.com, willy@infradead.org, vincent.chen@sifive.com, guoren@kernel.org, samitolvanen@google.com, songshuaishuai@tinylab.org, gerg@kernel.org, heiko@sntech.de, bhe@redhat.com, jeeheng.sia@starfivetech.com, cyy@cyyself.name, maskray@google.com, ancientmodern4@gmail.com, mathis.salmen@matsal.de, cuiyunhui@bytedance.com, bgray@linux.ibm.com, mpe@ellerman.id.au, baruch@tkos.co.il, alx@kernel.org, catalin.marinas@arm.com, revest@chromium.org, josh@joshtriplett.org, shr@devkernel.io, deller@gmx.de, omosnace@redhat.com, ojeda@kernel.org, jhubbard@nvidia.com References: <20240403234054.2020347-1-debug@rivosinc.com> <20240403234054.2020347-9-debug@rivosinc.com> <8fb37319-288c-4f77-9cd7-92f17bb567ee@redhat.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: CA11320023 X-Stat-Signature: wa8edtqcqqenhfuxoo5wmnp88ft74j59 X-Rspam-User: X-HE-Tag: 1712258146-344677 X-HE-Meta: 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 0NQ4yNz2 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 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: List-Subscribe: List-Unsubscribe: On 04.04.24 21:04, Mark Brown wrote: > On Thu, Apr 04, 2024 at 08:58:06PM +0200, David Hildenbrand wrote: > >> or even introduce some ARCH_HAS_SHADOW_STACK so we can remove these >> arch-specific thingies here. > > It would be convenient if you could pull the ARCH_HAS_USER_SHADOW_STACK > patch out of my clone3 series to do that: > > https://lore.kernel.org/all/20240203-clone3-shadow-stack-v5-3-322c69598e4b@kernel.org/ Crazy, I completely forgot about that one. Yes! -- Cheers, David / dhildenb