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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=klgQ3hZPfg+7fi3Hq0eGgXwHO5XPMJGc7+Bsf+xiRKw=; b=AREw6BRFFuzjgNI0xqhZXkBmT3vlQsJKeRKb85MrxrE1a4XW6nFbL5qDG5PUACnBlg 15O8/l35pgspCSRblvE26lUWs6msTXSk14amxlO+yH506NJXpzPtiFXAYxlP6LOALf03 KJBlOms5nVBZLVQ2z4RGmzIYtx5uIFPvgNOFTnTg7P9/cDh6OndNZv9fWLaMB3L+aZ13 6VUmFL8IZvsIMU1L9DxqRpv3FgwVZ7Uc1q/76KgbLQlZE4TY/+lzNTMuxMvwe2MnQbpQ nLukGZ6K7N9wBp+6WXyLo6gI/D1GIgxpx6BRnkNI5IFau1O0P+jxDhBPAy3ndVId2ebe lJcg== X-Gm-Message-State: AOAM532rN2pD6RozyfrTZZnflTph4/DidE32SbSh0Mv9LJbl2EhNFEfA +tG98ZOkfs5vlA7DA5v8RP+rw0bGKSK47cD13LJVhQ== X-Google-Smtp-Source: ABdhPJyaffK6LXuGg+vP8kNQ2h2pfiUtjBYW2vxrURWs62hVhrgjeURG9krsxTkdt6/k/f5YARGTWJFC1vI5cElVaes= X-Received: by 2002:ac2:4c11:: with SMTP id t17mr3558677lfq.260.1601587113324; Thu, 01 Oct 2020 14:18:33 -0700 (PDT) MIME-Version: 1.0 References: <20201001152232.274367-1-linus.walleij@linaro.org> <39a52fa8-4297-0072-755f-8c904227f12d@gmail.com> In-Reply-To: <39a52fa8-4297-0072-755f-8c904227f12d@gmail.com> From: Linus Walleij Date: Thu, 1 Oct 2020 23:18:21 +0200 Message-ID: Subject: Re: [PATCH 0/6 v14] KASan for Arm To: Florian Fainelli , Arnd Bergmann X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201001_171835_771891_1AADCF40 X-CRM114-Status: GOOD ( 14.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Abbott Liu , Russell King , Mike Rapoport , Andrey Ryabinin , Ard Biesheuvel , Linux ARM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Oct 1, 2020 at 9:19 PM Florian Fainelli wrote: > The physical memory map looks like this: > > 0..3GB -> DRAM > 3GB..4GB -> Registers, Boot ROM, Boot SRAM > 4GB..12GB -> DRAM extension So plenty of highmem, and then with LPAE you have theoretically 12 GB of RAM. In an ARM32 system? I think Arnd is gonna love this system for our highmem experiments if that is something that is going to happen often... Is that DRAM extension often mounted and used? > > Are these Broadcom chips hard to get for me? > > Yes they are hard for you to get. Isn't one of them this beast: https://www.ebay.com/c/502488121 Or do you mean that this device is locked down like a fortress and not really hackable? There seems to be a UART on the back and all. > Have you got your hands on a Raspberry Pi 4? That one would be > quite similar to one of our Broadcom STB chips (7211) and I would be > curious to know if it even works there. Pi 3 and 4 are 64bit Cortex A53 and A72 CPUs IIUC, so they are in arch/arm64 and does not have this problem. Your systems are curiously interesting, there is copious highmem etc. Yours, Linus Walleij _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel