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Thu, 29 Feb 2024 21:11:07 +0800 (CST) Received: from kwepemi500008.china.huawei.com (unknown [7.221.188.139]) by mail.maildlp.com (Postfix) with ESMTPS id BBA0B1402CE; Thu, 29 Feb 2024 21:11:44 +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; Thu, 29 Feb 2024 21:11:44 +0800 To: , , , , , , CC: Subject: [RFC PATCH v5 05/22] target/arm: Support MSR access to ALLINT Date: Thu, 29 Feb 2024 13:10:22 +0000 Message-ID: <20240229131039.1868904-6-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240229131039.1868904-1-ruanjinjie@huawei.com> References: <20240229131039.1868904-1-ruanjinjie@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.67.174.55] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemi500008.china.huawei.com (7.221.188.139) Received-SPF: pass client-ip=45.249.212.32; envelope-from=ruanjinjie@huawei.com; helo=szxga06-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, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: , Reply-to: Jinjie Ruan From: Jinjie Ruan via Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Support ALLINT msr access as follow: mrs , ALLINT // read allint msr ALLINT, // write allint with imm Signed-off-by: Jinjie Ruan Reviewed-by: Richard Henderson --- v5: - Add Reviewed-by. v4: - Remove arm_is_el2_enabled() check in allint_check(). - Change to env->pstate instead of env->allint. v3: - Remove EL0 check in aa64_allint_access() which alreay checks in .access PL1_RW. - Use arm_hcrx_el2_eff() in aa64_allint_access() instead of env->cp15.hcrx_el2. - Make ALLINT msr access function controlled by aa64_nmi. --- target/arm/helper.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/target/arm/helper.c b/target/arm/helper.c index affa493141..497b6e4bdf 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -4618,6 +4618,36 @@ static void aa64_daif_write(CPUARMState *env, const ARMCPRegInfo *ri, env->daif = value & PSTATE_DAIF; } +static void aa64_allint_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->pstate = (env->pstate & ~PSTATE_ALLINT) | (value & PSTATE_ALLINT); +} + +static uint64_t aa64_allint_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return env->pstate & PSTATE_ALLINT; +} + +static CPAccessResult aa64_allint_access(CPUARMState *env, + const ARMCPRegInfo *ri, bool isread) +{ + if (arm_current_el(env) == 1 && (arm_hcrx_el2_eff(env) & HCRX_TALLINT)) { + return CP_ACCESS_TRAP_EL2; + } + return CP_ACCESS_OK; +} + +static const ARMCPRegInfo nmi_reginfo[] = { + { .name = "ALLINT", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .opc2 = 0, .crn = 4, .crm = 3, + .type = ARM_CP_NO_RAW, + .access = PL1_RW, .accessfn = aa64_allint_access, + .fieldoffset = offsetof(CPUARMState, pstate), + .writefn = aa64_allint_write, .readfn = aa64_allint_read, + .resetfn = arm_cp_reset_ignore }, +}; + static uint64_t aa64_pan_read(CPUARMState *env, const ARMCPRegInfo *ri) { return env->pstate & PSTATE_PAN; @@ -9724,6 +9754,10 @@ void register_cp_regs_for_features(ARMCPU *cpu) if (cpu_isar_feature(aa64_nv2, cpu)) { define_arm_cp_regs(cpu, nv2_reginfo); } + + if (cpu_isar_feature(aa64_nmi, cpu)) { + define_arm_cp_regs(cpu, nmi_reginfo); + } #endif if (cpu_isar_feature(any_predinv, cpu)) { -- 2.34.1