From patchwork Sun Apr 7 08:17:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13620056 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 54AD6CD1292 for ; Sun, 7 Apr 2024 08:21:35 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rtNks-0004Cr-IQ; Sun, 07 Apr 2024 04:19:58 -0400 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 1rtNko-0004AZ-Ax; Sun, 07 Apr 2024 04:19:54 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rtNkk-0001zi-Ir; Sun, 07 Apr 2024 04:19:54 -0400 Received: from mail.maildlp.com (unknown [172.19.163.48]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4VC4pQ1m6xzNn61; Sun, 7 Apr 2024 16:17:34 +0800 (CST) Received: from kwepemi500008.china.huawei.com (unknown [7.221.188.139]) by mail.maildlp.com (Postfix) with ESMTPS id F0211180073; Sun, 7 Apr 2024 16:19:46 +0800 (CST) Received: from huawei.com (10.67.174.55) by kwepemi500008.china.huawei.com (7.221.188.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Sun, 7 Apr 2024 16:19:46 +0800 To: , , , , , , , CC: Subject: [PATCH v13 02/24] target/arm: Add PSTATE.ALLINT Date: Sun, 7 Apr 2024 08:17:11 +0000 Message-ID: <20240407081733.3231820-3-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240407081733.3231820-1-ruanjinjie@huawei.com> References: <20240407081733.3231820-1-ruanjinjie@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.174.55] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemi500008.china.huawei.com (7.221.188.139) Received-SPF: pass client-ip=45.249.212.189; envelope-from=ruanjinjie@huawei.com; helo=szxga03-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: , Reply-to: Jinjie Ruan X-Patchwork-Original-From: Jinjie Ruan via From: Jinjie Ruan Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When PSTATE.ALLINT is set, an IRQ or FIQ interrupt that is targeted to ELx, with or without superpriority is masked. As Richard suggested, place ALLINT bit in PSTATE in env->pstate. In the pseudocode, AArch64.ExceptionReturn() calls SetPSTATEFromPSR(), which treats PSTATE.ALLINT as one of the bits which are reinstated from SPSR to PSTATE regardless of whether this is an illegal exception return or not. So handle PSTATE.ALLINT the same way as PSTATE.DAIF in the illegal_return exit path of the exception_return helper. With the change, exception entry and return are automatically handled. Signed-off-by: Jinjie Ruan Reviewed-by: Richard Henderson Reviewed-by: Peter Maydell --- v13: - Handle PSTATE.ALLINT the same way as PSTATE.DAIF in the illegal_return exit path. - Update the commit message. - Add Reviewed-by. v5: - Remove the ALLINT comment, as it is covered by "all other bits". - Add Reviewed-by. v4: - Keep PSTATE.ALLINT in env->pstate but not env->allint. - Update the commit message. v3: - Remove ALLINT dump in aarch64_cpu_dump_state(). - Update the commit message. --- target/arm/cpu.h | 1 + target/arm/tcg/helper-a64.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index bc0c84873f..de740d223f 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -1430,6 +1430,7 @@ void pmu_init(ARMCPU *cpu); #define PSTATE_D (1U << 9) #define PSTATE_BTYPE (3U << 10) #define PSTATE_SSBS (1U << 12) +#define PSTATE_ALLINT (1U << 13) #define PSTATE_IL (1U << 20) #define PSTATE_SS (1U << 21) #define PSTATE_PAN (1U << 22) diff --git a/target/arm/tcg/helper-a64.c b/target/arm/tcg/helper-a64.c index ebaa7f00df..29f3ef274a 100644 --- a/target/arm/tcg/helper-a64.c +++ b/target/arm/tcg/helper-a64.c @@ -892,8 +892,8 @@ illegal_return: */ env->pstate |= PSTATE_IL; env->pc = new_pc; - spsr &= PSTATE_NZCV | PSTATE_DAIF; - spsr |= pstate_read(env) & ~(PSTATE_NZCV | PSTATE_DAIF); + spsr &= PSTATE_NZCV | PSTATE_DAIF | PSTATE_ALLINT; + spsr |= pstate_read(env) & ~(PSTATE_NZCV | PSTATE_DAIF | PSTATE_ALLINT); pstate_write(env, spsr); if (!arm_singlestep_active(env)) { env->pstate &= ~PSTATE_SS;