From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 247CBC433EF for ; Mon, 20 Jun 2022 19:10:11 +0000 (UTC) Received: from localhost ([::1]:41370 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o3Mmo-0000Ou-53 for qemu-devel@archiver.kernel.org; Mon, 20 Jun 2022 15:10:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43888) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o3LdG-0002rv-Bn for qemu-devel@nongnu.org; Mon, 20 Jun 2022 13:56:18 -0400 Received: from mail-pg1-x530.google.com ([2607:f8b0:4864:20::530]:40706) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1o3LdE-00021w-Rq for qemu-devel@nongnu.org; Mon, 20 Jun 2022 13:56:14 -0400 Received: by mail-pg1-x530.google.com with SMTP id f65so10894109pgc.7 for ; Mon, 20 Jun 2022 10:56:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=VJKQ6WoqB0EGYqa/ELNpHbDiJmRFJHnsDZvzPsZOiDk=; b=MECwVpZBF9Mx5nA2rel6uputE+EqXe27JdgLG5u01KAj5naGsQw0tloXaygg+UsoP8 NTLUeu4GxSv983exZm8AAlZF33CJEjqqq7MRVLWehVFr7MYD8MfOAnoIUCWgGpdU7g3n fTP4nDmhEUuGfTLfpLdASS+J9iPHAELNcXMBacfXCPjCXdgYFvB2BVXHS25xOKITpgvE L5JtTs0YzRc5pMK3wCudA++Hdbt5oFVlbYfCzEH3EphTNMY86JisieJsTn7w6yR1/Vro hJIV5daMRR6bFjSvEI9Zbufz2ErV03QhoIshP5gQoifblji4kr8dpgehUAukgJ7AcD4S 8qgA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=VJKQ6WoqB0EGYqa/ELNpHbDiJmRFJHnsDZvzPsZOiDk=; b=OX0JoywWwX47Pn14x5zABvp+hNiwzdsjNkWS7cEpyP9geaLpo/F9umZskiJ/BDMrPe OpRwgvW68iDU+Bi5i3b3MbRFDw5IwxPbSdgllNRUIuFehJ1IPRtLQJWaTBTvv12lbgtf h5J42qAp21bRKc4xYpD57PzTv15jxDw2g1HGG9V9dgco4HtSubnv3Od5sosjADlbHotu Q2gPjQ6s8Eh9jTVxnNtZ2m78HTN5PL7oEosV8tJ4yPjbachLTIYevrAgWWhQ6Nm8D92w 76KeC/avU72MxqGcdo7Ym9AkJvRNXuTKYbpIfLGrAsWvrlY8nBChfJKJGl6EL1GkTjwk rwmw== X-Gm-Message-State: AJIora/idmz4UHvlzL3oLgAVL09JWqqDXDmu/DE5bRh/TnHGxLSU0zTO 4Zd94IXPvorzag8K654B2V5Eg3r/0Ewc2w== X-Google-Smtp-Source: AGRyM1v6BNbnU8ZToPrSIuuuphz8tJn86CLb653EltKyerqaHShpQ1hkQxp8aImJ46rLRI/3Q1Br9Q== X-Received: by 2002:a05:6a02:28d:b0:408:8cbf:2a0c with SMTP id bk13-20020a056a02028d00b004088cbf2a0cmr22779162pgb.422.1655747771261; Mon, 20 Jun 2022 10:56:11 -0700 (PDT) Received: from stoup.. ([2602:47:d49e:3c01:a3e0:8a80:7b85:aea6]) by smtp.gmail.com with ESMTPSA id z14-20020aa7990e000000b00525184bad54sm3850474pff.126.2022.06.20.10.56.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jun 2022 10:56:10 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Subject: [PATCH v3 40/51] linux-user/aarch64: Reset PSTATE.SM on syscalls Date: Mon, 20 Jun 2022 10:52:24 -0700 Message-Id: <20220620175235.60881-41-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220620175235.60881-1-richard.henderson@linaro.org> References: <20220620175235.60881-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::530; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x530.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, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Richard Henderson --- linux-user/aarch64/cpu_loop.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/linux-user/aarch64/cpu_loop.c b/linux-user/aarch64/cpu_loop.c index 3b273f6299..4af6996d57 100644 --- a/linux-user/aarch64/cpu_loop.c +++ b/linux-user/aarch64/cpu_loop.c @@ -89,6 +89,15 @@ void cpu_loop(CPUARMState *env) switch (trapnr) { case EXCP_SWI: + /* + * On syscall, PSTATE.ZA is preserved, along with the ZA matrix. + * PSTATE.SM is cleared, per SMSTOP, which does ResetSVEState. + */ + if (FIELD_EX64(env->svcr, SVCR, SM)) { + env->svcr = FIELD_DP64(env->svcr, SVCR, SM, 0); + arm_rebuild_hflags(env); + arm_reset_sve_state(env); + } ret = do_syscall(env, env->xregs[8], env->xregs[0], -- 2.34.1