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Thu, 13 Feb 2020 07:35:07 +0000 (GMT) Subject: Re: [PATCH] ARM: bcm2835_defconfig: add minimal support for Raspberry Pi4 To: Nicolas Saenz Julienne , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Stefan Wahren From: Marek Szyprowski Message-ID: <5adcb2de-3570-9c4d-5e5b-726b94fb2029@samsung.com> Date: Thu, 13 Feb 2020 08:35:06 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: Content-Transfer-Encoding: 7bit Content-Language: en-US X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprBKsWRmVeSWpSXmKPExsWy7djPc7o6f1ziDN7ON7DY9Pgaq8XlXXPY LCbe3sBusW3WcjaLTStusDmwemy9ZeqxeUm9x+bT1R6fN8kFsERx2aSk5mSWpRbp2yVwZSx9 +oypoIuz4tOq+8wNjMvZuxg5OSQETCQuP//F2sXIxSEksIJRomP9D2YI5wujxLKORiaQKiGB z4wStz47wnR0TNrACBFfzihx4okpRMNbRolZU/6ygiSEBUIktnTOAZskIrCQUaL57kGgSRwc zAJaErOupILUsAkYSnS97WIDsXkF7CQmb78GtoxFQFXiw+4GMFtUIFbizLHvrBA1ghInZz5h AbE5BVwlDmz8AHYEs4C8xPa3ILtAbHGJW0/mM4HslRCYzi4x9csjFoirXSQad12DsoUlXh3f AvW/jMT/nTANzYwSD8+tZYdwehglLjfNYISospa4c+4XG8QHmhLrd+lDhB0lnm7bxA4SlhDg k7jxVhDiCD6JSdumM0OEeSU62oQgqtUkZh1fB7f24IVLzBMYlWYheW0WkndmIXlnFsLeBYws qxjFU0uLc9NTiw3zUsv1ihNzi0vz0vWS83M3MQLTy+l/xz/tYPx6KekQowAHoxIPr8Rr5zgh 1sSy4srcQ4wSHMxKIrzijUAh3pTEyqrUovz4otKc1OJDjNIcLErivMaLXsYKCaQnlqRmp6YW pBbBZJk4OKUaGB0emwce4+98vOLeDkulHa+jJZdocK5S3JDluZJJaouF8fuaDfNU7gpac+/Q n37Ff7b/tIdTuCdsDt/66Ci3+i73ikcBlb1fFe/8X/2mrf+YevK8Ny/rCm44T9Fbkcte2Pd7 0YZbirqLRe+dnhxl5iM0P+a5z9JZOVfklwbNFJrzWruyrl73KLcSS3FGoqEWc1FxIgAkZKGk KwMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrDIsWRmVeSWpSXmKPExsVy+t/xu7o6f1ziDHYfFbTY9Pgaq8XlXXPY LCbe3sBusW3WcjaLTStusDmwemy9ZeqxeUm9x+bT1R6fN8kFsETp2RTll5akKmTkF5fYKkUb WhjpGVpa6BmZWOoZGpvHWhmZKunb2aSk5mSWpRbp2yXoZSx9+oypoIuz4tOq+8wNjMvZuxg5 OSQETCQ6Jm1g7GLk4hASWMooMe/rEyaIhIzEyWkNrBC2sMSfa11sEEWvGSW2HjzACJIQFgiR eNK7jB0kISKwkFFi9qe9QFUcHMwCWhKzrqRCNJxhlNg/7zDYOjYBQ4mutyCTODl4BewkJm+/ BraNRUBV4sPuBjBbVCBW4tj2NnaIGkGJkzOfsIDYnAKuEgc2fgBbzCxgJjFv80NmCFteYvvb OVC2uMStJ/OZJjAKzULSPgtJyywkLbOQtCxgZFnFKJJaWpybnltsqFecmFtcmpeul5yfu4kR GFPbjv3cvIPx0sbgQ4wCHIxKPLwSr53jhFgTy4orcw8xSnAwK4nwijcChXhTEiurUovy44tK c1KLDzGaAj03kVlKNDkfGO95JfGGpobmFpaG5sbmxmYWSuK8HQIHY4QE0hNLUrNTUwtSi2D6 mDg4pRoYF63cvCfwQ3td9TW2JCnxQjfXzFtL9Ww/iu7/VVFx5rC5Z3FEelwnuy7TsU+Rr5Ze LN8b/l18f+GljD+Tn+y4f6fSuaruW0h/fBWrwp7Gdx2LfjTVLIhZlLz5seal6gV9bL+qbv/l 99nI//51VYeE7/uZm8r47/9q7Z/l+M/vqlzi+p8+DD/MlViKMxINtZiLihMBqTtoY78CAAA= X-CMS-MailID: 20200213073508eucas1p22d36cf1b15ea9ecd7a22d245e145fe05 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20200212102022eucas1p1c49daf15d3e63eda9a56124bc4eafb57 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200212102022eucas1p1c49daf15d3e63eda9a56124bc4eafb57 References: <20200212102009.17428-1-m.szyprowski@samsung.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Nicolas On 12.02.2020 19:31, Nicolas Saenz Julienne wrote: > Hi Marek, > On Wed, 2020-02-12 at 11:20 +0100, Marek Szyprowski wrote: >> Add drivers for the minimal set of devices needed to boot Raspberry Pi4 >> board. >> >> Signed-off-by: Marek Szyprowski > Just so you know, the amount of support on the RPi4 you might be able to get > updating bcm2835_defconfig's config is very limited. Only 1GB of ram and no > PCIe (so no USBs). Yes, I know. A lots of core features is missing: SMP, HIGHMEM, LPAE, PCI and so on, but having a possibility to boot RPi4 with this defconfig increases the test coverage. > FYI I've been working on getting a workable configuration for arm32, short of > creating a new config altogether: > https://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg163770.html > > That said, if you insist on booting with bcm2835_defconfig, I have no problem > with the patch. Right, having a proper multi defconfig with LPAE is also needed on other boards. I would add VIRTUALIZATION and KVM to it too. Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland