{"id":807397,"url":"http://patchwork.ozlabs.org/api/1.0/patches/807397/?format=json","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.0/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/"},"msgid":"<1504066360-30128-8-git-send-email-paulus@ozlabs.org>","date":"2017-08-30T04:12:30","name":"[v3,07/17] powerpc: Don't update CR0 in emulation of popcnt, prty, bpermd instructions","commit_ref":"5762e08344bd7c5bfc41030f74c4ab6ce6e461d0","pull_url":null,"state":"accepted","archived":false,"hash":"64953d477da35f3a3ac81bb7a5faa630ec1250a7","submitter":{"id":67079,"url":"http://patchwork.ozlabs.org/api/1.0/people/67079/?format=json","name":"Paul Mackerras","email":"paulus@ozlabs.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1504066360-30128-8-git-send-email-paulus@ozlabs.org/mbox/","series":[{"id":522,"url":"http://patchwork.ozlabs.org/api/1.0/series/522/?format=json","date":"2017-08-30T04:12:25","name":"powerpc: Do alignment fixups using analyse_instr etc.","version":3,"mbox":"http://patchwork.ozlabs.org/series/522/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/807397/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org","linuxppc-dev@ozlabs.org"],"Received":["from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xhssc2F67z9s9Y\n\tfor ;\n\tWed, 30 Aug 2017 14:27:00 +1000 (AEST)","from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xhssc13rWzDqJ9\n\tfor ;\n\tWed, 30 Aug 2017 14:27:00 +1000 (AEST)","from ozlabs.org (bilbo.ozlabs.org [103.22.144.67])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xhsYH1zPbzDqGG\n\tfor ;\n\tWed, 30 Aug 2017 14:12:51 +1000 (AEST)","by ozlabs.org (Postfix)\n\tid 3xhsYH1HLWz9sNc; Wed, 30 Aug 2017 14:12:51 +1000 (AEST)","from authenticated.ozlabs.org (localhost [127.0.0.1])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPSA id 3xhsYG6s9sz9sQl\n\tfor ; Wed, 30 Aug 2017 14:12:50 +1000 (AEST)"],"Authentication-Results":["ozlabs.org; dkim=pass (2048-bit key;\n\tsecure) header.d=ozlabs.org header.i=@ozlabs.org header.b=\"Mcky1U2j\";\n\tdkim-atps=neutral","lists.ozlabs.org; dkim=pass (2048-bit key;\n\tsecure) header.d=ozlabs.org header.i=@ozlabs.org header.b=\"Mcky1U2j\";\n\tdkim-atps=neutral","lists.ozlabs.org; dkim=pass (2048-bit key;\n\tsecure) header.d=ozlabs.org header.i=@ozlabs.org header.b=\"Mcky1U2j\"; \n\tdkim-atps=neutral"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ozlabs.org; s=201707; \n\tt=1504066371; bh=hiGdTmDmOvJhscVBIK0z9t4A9BrqLVG4ZCJ5GVP4h0I=;\n\th=From:To:Subject:Date:In-Reply-To:References:From;\n\tb=Mcky1U2jH/leoYyTP7iF9WWvaVDYWpIUQRTfBoXPMAEXvFZtOwJRx+Mjq/UKA1187\n\tFR4Ew77Szhk/RsA+ZtVRe+POsL1ji1GWtrkJ/z2pkkEX59ufaJLnfeLL5TFUPIxwi/\n\tWT4ZG8eFwhbYvZD/l4jWWxjtmYGp+ubsvWVdARydlFniCXap/P+7FwyZu/xmpCyp+/\n\trhITubRl6NeBSwoLfxSuoJ4FtiqKzMAY/ObheQ+9hZFDEx77FA5AjiO8jJ1LzLTgLO\n\tmBquRbJmRr9Zde8lto6f3sZTbIR7gwAbrfzB7VIJLWR8X2Hf+uKCbplhaW6WZwMOzV\n\t/dJV2XshpywGA==","From":"Paul Mackerras ","To":"linuxppc-dev@ozlabs.org","Subject":"[PATCH v3 07/17] powerpc: Don't update CR0 in emulation of popcnt, \n\tprty, bpermd instructions","Date":"Wed, 30 Aug 2017 14:12:30 +1000","Message-Id":"<1504066360-30128-8-git-send-email-paulus@ozlabs.org>","X-Mailer":"git-send-email 2.7.4","In-Reply-To":"<1504066360-30128-1-git-send-email-paulus@ozlabs.org>","References":"<1504066360-30128-1-git-send-email-paulus@ozlabs.org>","X-BeenThere":"linuxppc-dev@lists.ozlabs.org","X-Mailman-Version":"2.1.23","Precedence":"list","List-Id":"Linux on PowerPC Developers Mail List\n\t","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org","Sender":"\"Linuxppc-dev\"\n\t"},"content":"The architecture shows the least-significant bit of the instruction\nword as reserved for the popcnt[bwd], prty[wd] and bpermd\ninstructions, that is, these instructions never update CR0.\nTherefore this changes the emulation of these instructions to\nskip the CR0 update.\n\nSigned-off-by: Paul Mackerras \n---\n arch/powerpc/lib/sstep.c | 12 ++++++------\n 1 file changed, 6 insertions(+), 6 deletions(-)","diff":"diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c\nindex 522bc7b..114e597 100644\n--- a/arch/powerpc/lib/sstep.c\n+++ b/arch/powerpc/lib/sstep.c\n@@ -1469,7 +1469,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,\n \n \t\tcase 122:\t/* popcntb */\n \t\t\tdo_popcnt(regs, op, regs->gpr[rd], 8);\n-\t\t\tgoto logical_done;\n+\t\t\tgoto logical_done_nocc;\n \n \t\tcase 124:\t/* nor */\n \t\t\top->val = ~(regs->gpr[rd] | regs->gpr[rb]);\n@@ -1477,15 +1477,15 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,\n \n \t\tcase 154:\t/* prtyw */\n \t\t\tdo_prty(regs, op, regs->gpr[rd], 32);\n-\t\t\tgoto logical_done;\n+\t\t\tgoto logical_done_nocc;\n \n \t\tcase 186:\t/* prtyd */\n \t\t\tdo_prty(regs, op, regs->gpr[rd], 64);\n-\t\t\tgoto logical_done;\n+\t\t\tgoto logical_done_nocc;\n #ifdef CONFIG_PPC64\n \t\tcase 252:\t/* bpermd */\n \t\t\tdo_bpermd(regs, op, regs->gpr[rd], regs->gpr[rb]);\n-\t\t\tgoto logical_done;\n+\t\t\tgoto logical_done_nocc;\n #endif\n \t\tcase 284:\t/* xor */\n \t\t\top->val = ~(regs->gpr[rd] ^ regs->gpr[rb]);\n@@ -1497,7 +1497,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,\n \n \t\tcase 378:\t/* popcntw */\n \t\t\tdo_popcnt(regs, op, regs->gpr[rd], 32);\n-\t\t\tgoto logical_done;\n+\t\t\tgoto logical_done_nocc;\n \n \t\tcase 412:\t/* orc */\n \t\t\top->val = regs->gpr[rd] | ~regs->gpr[rb];\n@@ -1513,7 +1513,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,\n #ifdef CONFIG_PPC64\n \t\tcase 506:\t/* popcntd */\n \t\t\tdo_popcnt(regs, op, regs->gpr[rd], 64);\n-\t\t\tgoto logical_done;\n+\t\t\tgoto logical_done_nocc;\n #endif\n \t\tcase 922:\t/* extsh */\n \t\t\top->val = (signed short) regs->gpr[rd];\n","prefixes":["v3","07/17"]}