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([122.255.60.245]) by smtp.gmail.com with ESMTPSA id t17-20020a170902e85100b00162529828aesm25199256plg.109.2022.07.06.01.25.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Jul 2022 01:25:49 -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=QXu/KgUnFX9XdonKOb4RpodqXgfNtkqVhXPaRa0Wz+g=; b=vLH8u/YI6xNxYEqgir1ZeiCndQwgdBo+q/o9gvHh83VvtPfjnuOFng5j5qZUlVptkO zC9ZtRT0OUKcaK5BtjJxZcqIDLjNDpYzOo4Yrogu8y3X8BezJzHfiMYDQjq5xQG6m9Cd kYSJXJfqUrA3pdoHUL6cy/1ZOtUKMUbeRBGKfHU705kU/n+e/wmIJu2gMv0NJ6jRGeMe GDHqpvAszlmFK8TjSzYTDSehB3TnmZd1uVpaQ/pdvOXWcYdPydqFwODtDfLQMP6Z7pzc 4+t/Jfgg41865AqcYK+zFqbgu0ev40xlhFeWZbsOC474WV1Z7eAsDNe8hqq2xROBAF08 M+yA== 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=QXu/KgUnFX9XdonKOb4RpodqXgfNtkqVhXPaRa0Wz+g=; b=It0Uhe6qKcGMHK5K9uwmo9o7YGiLuNrGDcv7nqDGDvkaRHvvQFtaCMnn0SM8tWZVDY j/VarQqucO1CjNcLXHYsVIFMiTFcqDGOOpFblpkgl+VzMEMMS9OWG7ctHQXinKrYR5lU o50y/AyYJBzEWWvhz5uIVlqO7mTRvwpvhib69i/Z1zgSfkSR+MvlunwuWDtpiXDwJwga Agub6HqN2wcMbh3IeFshVpK+OehgxQdTFM8T+jnWh0iEyMGHz6nqhOUpOIillYxjN9oC mNk7QXX90u9aQ8OFXouY2nOMpY57n5jACADlehUIrPkoDx5LXa0Amla7OsdYoxVygN8p Rxpg== X-Gm-Message-State: AJIora++N65W4JzXwNNbffYBuu9QhShQLkV4cUk18ZuMkpLruK+NK5pW ne/KxzyZl7InrsXHD8GBIJxg48xr7sIigXKX X-Google-Smtp-Source: AGRyM1vSGECh3yoNDU0okya744TCBNzfEohiMq8Bez7O1S9Etj+n9Fn499+sYw3TUqL/z9+n6y4Cvw== X-Received: by 2002:a05:6a00:1901:b0:4fa:fa9e:42e6 with SMTP id y1-20020a056a00190100b004fafa9e42e6mr45598933pfi.1.1657095949999; Wed, 06 Jul 2022 01:25:49 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Peter Maydell Subject: [PATCH v5 34/45] linux-user/aarch64: Reset PSTATE.SM on syscalls Date: Wed, 6 Jul 2022 13:54:00 +0530 Message-Id: <20220706082411.1664825-35-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220706082411.1664825-1-richard.henderson@linaro.org> References: <20220706082411.1664825-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::433; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x433.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=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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1657101158487100001 Content-Type: text/plain; charset="utf-8" Reviewed-by: Peter Maydell 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 f7ef36cd9f..9875d609a9 100644 --- a/linux-user/aarch64/cpu_loop.c +++ b/linux-user/aarch64/cpu_loop.c @@ -89,6 +89,15 @@ void cpu_loop(CPUARMState *env) =20 switch (trapnr) { case EXCP_SWI: + /* + * On syscall, PSTATE.ZA is preserved, along with the ZA matri= x. + * PSTATE.SM is cleared, per SMSTOP, which does ResetSVEState. + */ + if (FIELD_EX64(env->svcr, SVCR, SM)) { + env->svcr =3D FIELD_DP64(env->svcr, SVCR, SM, 0); + arm_rebuild_hflags(env); + arm_reset_sve_state(env); + } ret =3D do_syscall(env, env->xregs[8], env->xregs[0], --=20 2.34.1