[{"id":3678934,"web_url":"http://patchwork.ozlabs.org/comment/3678934/","msgid":"","list_archive_url":null,"date":"2026-04-18T00:54:17","subject":"Re: [PATCH 0/7] aarch64: SME ZA/ZT0 fixes","submitter":{"id":91428,"url":"http://patchwork.ozlabs.org/api/people/91428/","name":"Andrew Pinski","email":"andrew.pinski@oss.qualcomm.com"},"content":"On Fri, Apr 17, 2026 at 5:28 PM Alice Carlotti wrote:\n>\n> Patches 1-4 are bug fixes. Patches 5-6 are comment or documentation fixes.\n> Patch 7 adds mode transitions to dump output (this can wait till stage 1).\n> All of the patches can be applied independently.\n>\n> Ok for master? And ok to backport patches 2-6 to GCC 14/15?\n\nI approved 5 and 7; they can go in for the trunk now (the dump one\nshould be ok even for stage 4) and 5 can be backported to all open\nbranches (including 13). I will let someone else review the others.\n\nThanks,\nAndrew\n\n\n>\n>\n>\n>\n> The patch 3 bug has been discovered and reported independently at least three\n> times that I've seen. While investigating this (and reading most of the ZA\n> mode switching logic in depth), I identified the patch 2 and 4 bugs. My\n> original attempt at writing a testcase for patch 2 exposed the patch 1 bug.\n>\n> I think these patches address all the wrong-code bugs in the ZA state\n> transition logic. However, there is still room to optimise the mode\n> transitions further - for example, it would be better to delay a transition out\n> of INACTIVE_CALLER state until after a private ZA function, if ZA is not used\n> before the call.\n>\n> Alice","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=G94odoWR;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=iDXkRag+;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (2048-bit key,\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=G94odoWR;\n\tdkim=pass (2048-bit key,\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=iDXkRag+","sourceware.org; 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