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Wed, 2 Jun 2021 14:09:19 +0000 (GMT) Subject: Re: [PATCH] arm64: cache: Lower ARCH_DMA_MINALIGN to 64 (L1_CACHE_BYTES) To: Mark Rutland Cc: Will Deacon , linux-arm-kernel@lists.infradead.org, kernel-team@android.com, Catalin Marinas , Ard Biesheuvel , Arnd Bergmann , Vincent Whitchurch , Bartlomiej Zolnierkiewicz From: Marek Szyprowski Message-ID: <130ce34f-460a-0046-f722-00144f2d5502@samsung.com> Date: Wed, 2 Jun 2021 16:09:19 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.2 MIME-Version: 1.0 In-Reply-To: <20210602135123.GD12753@C02TD0UTHF1T.local> Content-Language: en-US X-Brightmail-Tracker: H4sIAAAAAAAAA01SZ0xTURjN7et41BQvBeWLWgyN4gTF+XAQF9oYE+uKKwrVPisCpfYBKq6G KkitA4xQq1FxIoKVVRCMAy1IUBx1gKKoEFEiIApGQEXb5+Df+c53zj3nSy5JiC/y+pGh6iha q1aES/lCrrW0o9IXJxWEjK4r9aI62loQ9SO5VEBlmyw8quWcEVGFBR5UTt1THnX22UMOdd86 n9pVM36ai8xabOXJMo9nIllXZzKSPbskl+VkJPJluWd2yvbnZSC5YIVwipIOD42htaMCQ4Tr DxuyBZoHsLk59TahQ7keBuRCAh4HiZ/SkQEJSTFOR9BVayMcCzFuQ6C/xmXxFwQNryb9NXww 27ms4TyCj50pAnZoRZDz+Q7HoXLHi8Bqf+N8yQMPAWNRm9NB4Ksc2J1mdi742B8MTQa+A4tw IOirLL+xgOTiQZCw1IBIsg9eC13ZvqzADcqP1Dv7uGAKyjt3OZMIPBD0+UcJFnvC8/oTHEcS 4DYSbC/YJMCzwKh7K2CxOzSW5f3BA6DikJHLGvQI3lRmCdjBiMAeZ0KsajLUVHbyHY0IPAws RaNYejqkPunmOGjArlDV5MaWcIVkayrB0iLYEy9m1T5gLrv0L/bmg0fEQSQ19zjN3OMcc49z zP9zTyJuBvKko5kIFc2MVdOb/BhFBBOtVvmtjYzIQb//U8XPsvZClN7Y6leCOCQqQUASUg/R HHV+iFikVGyJpbWRwdrocJopQf1JrtRTVJSfGSzGKkUUHUbTGlr7d8shXfrpOEeSVs0OehgF KSGnCVWBhJcmDWSk8RN3i24ujd6ry5JsMPWyPI9ZGJTm03u5ZtOQ2Phjmh8NjybUWxMSC5V6 YYWr6eu8bUm5G+98sA2eih9PihieG4ZbX29tar/wOSFtZPOwgOnLqqx144IXxXo/MVR/R6rl 5Ys/1ua39928VT5a3u02qGzeTqHXmfIGyTZbet2OzGZmJbl9bnWcyWeOpiNPudh9dYvkxhr6 64Ir/mElr0ZMiMwL+H7VsoVclxUQ863Gvuz2uzClPFR3oHhA9a2X7+37KK+hM5aYZ0oGn5I/ 9aps0b67cvniGm+dbYfR+64qriqp+6DrOd97xXc1Y67X9lF9k3KZ9Qr/4YSWUfwCIK1lPL4D AAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrAIsWRmVeSWpSXmKPExsVy+t/xe7oCE7cnGNz+wmLx88t7Rou/k46x W2ycsZ7V4v2yHkaLHdtFLDY9vsZqsfT6RSaL89v8LVrumDpwemzbvY3VY828NYwev39NYvS4 vi7AY9OqTjaPzUvqPfq2rGIMYI/SsynKLy1JVcjILy6xVYo2tDDSM7S00DMysdQzNDaPtTIy VdK3s0lJzcksSy3St0vQy5jatZG94IJExbvpR5gbGDeLdDFyckgImEi8nHWZpYuRi0NIYCmj xP4NF1ghEjISJ6c1QNnCEn+udbFBFL1nlLjwehkzSEJYIFhi2+WHYLaIgLpEz64vYJOYBfYw Sew9+5YZouM1o8T37q2MIFVsAoYSXW9BRnFy8ArYSTTfWA9ks3OwCKhItIeDREUFkiU2tP9n hagQlDg58wkLiM0pYCFx8lcLE4jNLGAmMW8zxF5mAXmJ5q2zoWxxiVtP5jNNYBSahaR9FpKW WUhaZiFpWcDIsopRJLW0ODc9t9hQrzgxt7g0L10vOT93EyMwKrcd+7l5B+O8Vx/1DjEycTAe YpTgYFYS4XXP25ogxJuSWFmVWpQfX1Sak1p8iNEU6JuJzFKiyfnAtJBXEm9oZmBqaGJmaWBq aWasJM67de6aeCGB9MSS1OzU1ILUIpg+Jg5OqQYmib9s4klMxztfKfwWevnfaon75T7tbX/v yAqoTjx6Un9divPae/NK7NxWrVj4eMPj4gX7Jrey7tPezfpk2YOQmmeKXa5PmqL3uWVqdbxK C816Ivl2kvB7kUyh8802Swtd/ut8TWCyzXA8u4ZTL8ygL8ShVaihTKUg7EiCspSN/vebmuv3 Z2paacZdKnxrceqVbP2kp/e6ZpQ+5mVc97rFunhP5XNxvsMbOZLXCNzmut4RdGPeFnPNY7+S Rda/fql74b/VoZMRR76/CJY1kt3Fvbrh4/4iffOOpthZbfN32f94P/Xi+YbXPzXXekYdl14m /FIz6N48bvnamg0fb1yyEWjc9f6RKefZ9oNb50atVGIpzkg01GIuKk4EALm1ToFTAwAA X-CMS-MailID: 20210602140920eucas1p2f575d8bc61d083f3e8e742a90eec381d X-Msg-Generator: CA X-RootMTR: 20210602132541eucas1p17127696041c26c00d1d2f50bef9cfaf0 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20210602132541eucas1p17127696041c26c00d1d2f50bef9cfaf0 References: <20210527124356.22367-1-will@kernel.org> <4d0c8318-bad8-2be7-e292-fc8f70c198de@samsung.com> <20210602135123.GD12753@C02TD0UTHF1T.local> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210602_070928_511940_5E0FCA71 X-CRM114-Status: GOOD ( 21.32 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkKCk9uIDAyLjA2LjIwMjEgMTU6NTEsIE1hcmsgUnV0bGFuZCB3cm90ZToKPiBIaSBNYXJlaywK Pgo+IE9uIFdlZCwgSnVuIDAyLCAyMDIxIGF0IDAzOjI1OjQxUE0gKzAyMDAsIE1hcmVrIFN6eXBy b3dza2kgd3JvdGU6Cj4+IE9uIDI3LjA1LjIwMjEgMTQ6NDMsIFdpbGwgRGVhY29uIHdyb3RlOgo+ PiBUaGlzIHBhdGNoIGxhbmRlZCBpbiB0b2RheXMgbGludXgtbmV4dCBhcyBjb21taXQgNjU2ODhk MmEwNWRlICgiYXJtNjQ6Cj4+IGNhY2hlOiBMb3dlciBBUkNIX0RNQV9NSU5BTElHTiB0byA2NCAo TDFfQ0FDSEVfQllURVMpIikuIEl0IGNhdXNlcyBhbgo+PiBpc3N1ZSBvbiBSYXNwYmVycnkgUGkg M2IgYm9hcmQuIFN5c3RlbSBib290cyB0byB1c2Vyc3BhY2UgZmluZSwgYnV0IHRoZW4KPj4gaXQg aGFuZ3Mgc29tZXdoZXJlIGR1cmluZyB0aGUgaW5pdCBzY3JpcHRzIGFmdGVyIGxvYWRpbmcgdGhl IG1vZHVsZXMuIEkKPj4gZGlkbid0IG1hbmFnZSB0byB0cmFjayB3aGVyZSBpdCBoYW5ncyB5ZXQg dGhvdWdoLgo+IE91Y2ghCj4KPiBJIGhhdmUgYSAzYiBpbiBhIGRyYXdlciB0aGF0IEkgbWlnaHQg YmUgYWJsZSB0byByZXByb2R1Y2UgdGhlIGlzc3VlCj4gd2l0aDsgY2FuIHlvdSB0ZWxsIG1lIGhv dyB5b3UncmUgYm9vdGluZyB0aGF0IGtlcm5lbD8gZS5nLiB3aGljaCBGVyBhbmQKPiBEVCB5b3Un cmUgdXNpbmc/CgpJJ20gYm9vdGluZyB0aGUga2VybmVsIHdpdGggdGhlIG1haW5saW5lIGR0YiAK KGFyY2gvYXJtNjQvYm9vdC9kdHMvYnJvYWRjb20vYmNtMjgzNy1ycGktMy1iLmR0YikgZnJvbSB0 aGUgdS1ib290LCAKd2hpY2ggZG93bmxvYWRzIGl0IHZpYSBURlRQLiBJIGRvbid0IHJlbWVtYmVy IHdoaWNoIGZpcm13YXJlIHZlcnNpb24gaXMgCnRoZXJlLCBidXQgd2l0aG91dCByYXNwYmVycnkg c3BlY2lmaWMgdG9vbHMgKHdoaWNoIEkgZG9uJ3QgaGF2ZSBkZXBsb3llZCAKdGhlcmUpIGl0IGlz IGhhcmQgdG8gY2hlY2sgdGhhdCBub3cuIFRoZSByb290ZnMgaXMgb24gU0QgY2FyZCwgdGhlIApz eXN0ZW0gaXMgc29tZSBvbGRlciBEZWJpYW4gcmVsZWFzZS4gSGVyZSBpcyB0aGUgbGFzdCBwYXJ0 IG9mIHRoZSBib290IApsb2cgaWYgaXQgaGVscHM6CgpbwqDCoMKgIDcuOTA2MzI5XSBGcmVlaW5n IHVudXNlZCBrZXJuZWwgbWVtb3J5OiA4NTEySwpbwqDCoMKgIDcuOTExNzkzXSBSdW4gL3NiaW4v aW5pdCBhcyBpbml0IHByb2Nlc3MKSU5JVDogdmVyc2lvbiAyLjg4IGJvb3RpbmcKW2luZm9dIFVz aW5nIG1ha2VmaWxlLXN0eWxlIGNvbmN1cnJlbnQgYm9vdCBpbiBydW5sZXZlbCBTLgpFUlJPUjog Y291bGQgbm90IG9wZW4gL3Byb2Mvc3RhdDogTm8gc3VjaCBmaWxlIG9yIGRpcmVjdG9yeQpbLi4u Ll0gU3RhcnRpbmcgdGhlIGhvdHBsdWcgZXZlbnRzIGRpc3BhdGNoZXI6IHN5c3RlbWQtdWRldmRz dGFydGluZyAKdmVyc2lvbiAyMzYKLiBvawpbLi4uLl0gU3ludGhlc2l6aW5nIHRoZSBpbml0aWFs IGhvdHBsdWcgZXZlbnRzLi4uW8KgwqAgMTMuNjQxMjg3XSAKYmNtMjgzNS1ybmcgM2YxMDQwMDAu cm5nOiBod3JuZyByZWdpc3RlcmVkClvCoMKgIDEzLjg5NjU3NV0gaTJjLWJjbTI4MzUgM2Y4MDUw MDAuaTJjOiBDb3VsZCBub3QgcmVhZCBjbG9jay1mcmVxdWVuY3kgCnByb3BlcnR5CmRvbmUuClvC oMKgIDEzLjkzODY5MV0gZGVidWdmczogRGlyZWN0b3J5ICczZjkwMjAwMC5oZG1pJyB3aXRoIHBh cmVudCAndmM0LWhkbWknIAphbHJlYWR5IHByZXNlbnQhClvCoMKgIDEzLjk4MzcxNl0gdmM0LWRy bSBzb2M6Z3B1OiBib3VuZCAzZjkwMjAwMC5oZG1pIChvcHMgdmM0X2hkbWlfb3BzKQpbwqDCoCAx My45OTE4MTZdIHZjNC1kcm0gc29jOmdwdTogYm91bmQgM2Y4MDYwMDAudmVjIChvcHMgdmM0X3Zl Y19vcHMpClvCoMKgIDE0LjAwMDk0NV0gdmM0LWRybSBzb2M6Z3B1OiBib3VuZCAzZjQwMDAwMC5o dnMgKG9wcyB2YzRfaHZzX29wcykKW8KgwqAgMTQuMDA5NjQ0XSB2YzQtZHJtIHNvYzpncHU6IGJv dW5kIDNmMDA0MDAwLnR4cCAob3BzIHZjNF90eHBfb3BzKQpbwqDCoCAxNC4wMTc1NDddIHZjNC1k cm0gc29jOmdwdTogYm91bmQgM2YyMDYwMDAucGl4ZWx2YWx2ZSAob3BzIHZjNF9jcnRjX29wcykK W8KgwqAgMTQuMDI1NzgwXSB2YzQtZHJtIHNvYzpncHU6IGJvdW5kIDNmMjA3MDAwLnBpeGVsdmFs dmUgKG9wcyB2YzRfY3J0Y19vcHMpClvCoMKgIDE0LjAzMzk5NV0gdmM0LWRybSBzb2M6Z3B1OiBi b3VuZCAzZjgwNzAwMC5waXhlbHZhbHZlIChvcHMgdmM0X2NydGNfb3BzKQpbwqDCoCAxNC4wNDIx OTZdIHZjNC1kcm0gc29jOmdwdTogYm91bmQgM2ZjMDAwMDAudjNkIChvcHMgdmM0X3YzZF9vcHMp ClsuLi4uXSBXYWl0aW5nIGZvciAvZGV2IHRvIGJlIGZ1bGx5IHBvcHVsYXRlZC4uLlvCoMKgIDE0 LjExMjgxMl0gW2RybV0gCkluaXRpYWxpemVkIHZjNCAwLjAuMCAyMDE0MDYxNiBmb3Igc29jOmdw dSBvbiBtaW5vciAwCmRvbmUuClsgb2sgXSBBY3RpdmF0aW5nIHN3YXAuLi5kb25lLgpbLi4uLl0g Q2hlY2tpbmcgZmlsZSBzeXN0ZW1zLi4uZnNjayBmcm9tIHV0aWwtbGludXggMi4yOS4yCmRvbmUu Clsgb2sgXSBDbGVhbmluZyB1cCB0ZW1wb3JhcnkgZmlsZXMuLi4gL3RtcC4KWyBvayBdIE1vdW50 aW5nIGxvY2FsIGZpbGVzeXN0ZW1zLi4uZG9uZS4KWyBvayBdIEFjdGl2YXRpbmcgc3dhcGZpbGUg c3dhcC4uLmRvbmUuClsgb2sgXSBDbGVhbmluZyB1cCB0ZW1wb3JhcnkgZmlsZXMuLi4uClsgb2sg XSBTZXR0aW5nIGtlcm5lbCB2YXJpYWJsZXMuLi5kb25lLgpbIG9rIF0gQ29uZmlndXJpbmcgbmV0 d29yayBpbnRlcmZhY2VzLi4uZG9uZS4KWyBvayBdIFN0YXJ0aW5nIFJQQyBwb3J0IG1hcHBlciBk YWVtb246IHJwY2JpbmQuClsgb2sgXSBDbGVhbmluZyB1cCB0ZW1wb3JhcnkgZmlsZXMuLi4uClsg b2sgXSBTZXR0aW5nIHVwIEFMU0EuLi5kb25lLgpbIG9rIF0gU2V0dGluZyB1cCBYIHNvY2tldCBk aXJlY3Rvcmllcy4uLiAvdG1wLy5YMTEtdW5peCAvdG1wLy5JQ0UtdW5peC4KCkJlc3QgcmVnYXJk cwoKLS0gCk1hcmVrIFN6eXByb3dza2ksIFBoRApTYW1zdW5nIFImRCBJbnN0aXR1dGUgUG9sYW5k CgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgt YXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQu b3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJt LWtlcm5lbAo=