From patchwork Mon Feb 12 23:47:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helge Deller X-Patchwork-Id: 13554169 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 C7B22C4829F for ; Mon, 12 Feb 2024 23:48:44 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rZg1c-0003EE-Ht; Mon, 12 Feb 2024 18:47:48 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rZg1Z-0003CP-NO for qemu-devel@nongnu.org; Mon, 12 Feb 2024 18:47:45 -0500 Received: from sin.source.kernel.org ([145.40.73.55]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rZg1X-00008u-W6 for qemu-devel@nongnu.org; Mon, 12 Feb 2024 18:47:45 -0500 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 2A5E7CE17E7; Mon, 12 Feb 2024 23:47:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26BEAC433C7; Mon, 12 Feb 2024 23:47:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707781660; bh=QEDKIdARto+ZCseIU47VCEGfs+CMVMZ3Lv39zKgePHQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g/Xq8CG+QSRseydqktWIUlAXviVy4BX3/1N/U11esSI5DYPwlCj/NGrJc2D15Nyf2 B1Ms25z1CUQB2IRfAknEZnJXr3JByKPsTsUpmwPzPUVJDAL74vx/I4+pSlXnVa7J+1 tB6t4YZQk1TrT83wSyIgD/pEe1Ch800wlyQ+z+/gJTE+XkBictZMpET0pjDWCUewku I3qRgHECvTvuy2vd6MfNI2T9WqkHOS+7eKFx0NTciA/0Eq8FFC6XSdJEmvRtLwI9kU 7402YM/xq/PztlQlTQHhTt+WJmgmPBicAGJzxRyKz6GGVfHZ2oGhUq5JDEX9DY3r89 Oj09MqD7NvSGg== From: deller@kernel.org To: qemu-devel@nongnu.org Cc: Richard Henderson , Sven Schnelle , Jason Wang , Helge Deller Subject: [PULL 08/12] target/hppa: Allow read-access to PSW with rsm 0, reg instruction Date: Tue, 13 Feb 2024 00:47:19 +0100 Message-ID: <20240212234723.222847-9-deller@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240212234723.222847-1-deller@kernel.org> References: <20240212234723.222847-1-deller@kernel.org> MIME-Version: 1.0 Received-SPF: pass client-ip=145.40.73.55; envelope-from=deller@kernel.org; helo=sin.source.kernel.org X-Spam_score_int: -51 X-Spam_score: -5.2 X-Spam_bar: ----- X-Spam_report: (-5.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.774, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Helge Deller HP-UX 11 and HP ODE tools use the "rsm 0,%reg" instruction in not priviledged code paths to get the current PSW flags. The constant 0 means that no bits of the PSW shall be reset, so this is effectively a read-only access to the PSW. Allow this read-only access even for not privileged code. Signed-off-by: Helge Deller Acked-by: Richard Henderson --- target/hppa/translate.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/target/hppa/translate.c b/target/hppa/translate.c index 53ec57ee86..01f3188656 100644 --- a/target/hppa/translate.c +++ b/target/hppa/translate.c @@ -2156,10 +2156,16 @@ static bool trans_ldsid(DisasContext *ctx, arg_ldsid *a) static bool trans_rsm(DisasContext *ctx, arg_rsm *a) { +#ifdef CONFIG_USER_ONLY CHECK_MOST_PRIVILEGED(EXCP_PRIV_OPR); -#ifndef CONFIG_USER_ONLY +#else TCGv_i64 tmp; + /* HP-UX 11i and HP ODE use rsm for read-access to PSW */ + if (a->i) { + CHECK_MOST_PRIVILEGED(EXCP_PRIV_OPR); + } + nullify_over(ctx); tmp = tcg_temp_new_i64();