{"id":2227693,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2227693/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260424043014.46305-14-richard.henderson@linaro.org/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.1/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260424043014.46305-14-richard.henderson@linaro.org>","date":"2026-04-24T04:29:47","name":"[v2,13/40] target/arm: Trap direct acceses to FPMR","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"6034a607a0323c0609ffa5f49709afb21e3c6af4","submitter":{"id":72104,"url":"http://patchwork.ozlabs.org/api/1.1/people/72104/?format=json","name":"Richard Henderson","email":"richard.henderson@linaro.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260424043014.46305-14-richard.henderson@linaro.org/mbox/","series":[{"id":501300,"url":"http://patchwork.ozlabs.org/api/1.1/series/501300/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501300","date":"2026-04-24T04:29:37","name":"target/arm: Implement FEAT_FP8","version":2,"mbox":"http://patchwork.ozlabs.org/series/501300/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227693/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227693/checks/","tags":{},"headers":{"Return-Path":"<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=aZPv0wcW;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g20Wg4hW7z1yJF\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 24 Apr 2026 14:35:43 +1000 (AEST)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wG8Cm-0008A0-IH; Fri, 24 Apr 2026 00:31:52 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <richard.henderson@linaro.org>)\n id 1wG8CJ-00072c-06\n for qemu-devel@nongnu.org; Fri, 24 Apr 2026 00:31:30 -0400","from mail-oi1-x235.google.com ([2607:f8b0:4864:20::235])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from <richard.henderson@linaro.org>)\n id 1wG8CH-0002pB-3d\n for qemu-devel@nongnu.org; Fri, 24 Apr 2026 00:31:22 -0400","by mail-oi1-x235.google.com with SMTP id\n 5614622812f47-4670676ba03so2222130b6e.1\n for <qemu-devel@nongnu.org>; Thu, 23 Apr 2026 21:31:20 -0700 (PDT)","from stoup.. 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helo=mail-oi1-x235.google.com","X-Spam_score_int":"-20","X-Spam_score":"-2.1","X-Spam_bar":"--","X-Spam_report":"(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development <qemu-devel.nongnu.org>","List-Unsubscribe":"<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>","List-Archive":"<https://lists.nongnu.org/archive/html/qemu-devel>","List-Post":"<mailto:qemu-devel@nongnu.org>","List-Help":"<mailto:qemu-devel-request@nongnu.org?subject=help>","List-Subscribe":"<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Signed-off-by: Richard Henderson <richard.henderson@linaro.org>\n---\n target/arm/tcg/translate-a64.c | 4 ++++\n 1 file changed, 4 insertions(+)","diff":"diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c\nindex ef6038e98b..d132e051ca 100644\n--- a/target/arm/tcg/translate-a64.c\n+++ b/target/arm/tcg/translate-a64.c\n@@ -2898,6 +2898,10 @@ static void handle_sys(DisasContext *s, bool isread,\n     }\n \n     if (!skip_fp_access_checks) {\n+        if ((ri->type & ARM_CP_FPMR) && s->fpmr_el != 0) {\n+            gen_exception_insn_el(s, 0, EXCP_UDEF, syndrome, s->fpmr_el);\n+            return;\n+        }\n         if ((ri->type & ARM_CP_FPU) && !fp_access_check_only(s)) {\n             return;\n         } else if ((ri->type & ARM_CP_SVE) && !sve_access_check(s)) {\n","prefixes":["v2","13/40"]}