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([122.255.60.245]) by smtp.gmail.com with ESMTPSA id n17-20020a056a0007d100b0051bada81bc7sm29085774pfu.161.2022.07.08.08.17.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Jul 2022 08:17:27 -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=iPqiAvNnaPHiE+AFIGN3QAnhp87OHXfDLk7LAnf0PL92ygxf9A/1QsN8BOPsAA89lw 4tkayynTtTHbSXgy5HFOAqxP+pvV20i6XZ3jd8pMmu/VP1DrdIUsmAbp+9lL4GD8GDyN 9PQcUZzU27o/FB5ctTGsLVVXVRhV5mfb1bMBwXHYsCov9RQnMk4iKojYCq6xAhelh30N H6LF3VNsSokP9E+fxT5jj8O44Ajzp45v1gxk2X1iTqDjwF9PWHqGAkba4s/mH/KY9rak UF2R2/uOAekTQM9WyEYuSIPqcmYpyXNmQP2b3scGTLtW7WMpVvCOoSGW04V+QsCu8lqD w+EA== 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=pQOcZreia5t64unblz9IePqjUeWWZ0AUHM2ojxvg4s6nyPn16dFcVA0q7JoAldYzaj dvriVkDnZYeon0rNEk9c2KjgGlLpov0Rw8TIAxXcbliQIuMTY/JV7zjLHWut7Z/KPZgx PtlsQCKBnYK9XvHCMTsE+9RXgpMEyZNYLKswifWOd6+PA/h5yEcThdt2YalICM3xLHu2 +psQviFQMh31Zjl4f4JOtmRbAdmrGYINv1YQSxXhCT/VVBMKjtj+XVN64NydgIRUuiCw DSGyFa5xPjsmLvegdLCMnILBNTOk21UeEccVaS1MUhiS3rc6PG8yOlMitv1YCKeAqsw8 HZdw== X-Gm-Message-State: AJIora9Vn2c0ujmXDBbNdBsAzaXFArmEKncIrr5qdCneZf9fva0hxIP2 4iTW8Wz2rKXAOpDpbPXgNP/nAi9X1r24SVdV X-Google-Smtp-Source: AGRyM1tcTUNPXzYLbYG53zQbeJ/Ny4BkgYTG2GNr661Gkx9SG8y/fchdEvVhl1sQWUfNSixjgJejGw== X-Received: by 2002:a62:29c2:0:b0:527:ab6a:c310 with SMTP id p185-20020a6229c2000000b00527ab6ac310mr4239129pfp.12.1657293448077; Fri, 08 Jul 2022 08:17:28 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Peter Maydell Subject: [PATCH v6 34/45] linux-user/aarch64: Reset PSTATE.SM on syscalls Date: Fri, 8 Jul 2022 20:45:29 +0530 Message-Id: <20220708151540.18136-35-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220708151540.18136-1-richard.henderson@linaro.org> References: <20220708151540.18136-1-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::42f; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42f.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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1657295999995100001 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