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[174.21.142.130]) by smtp.gmail.com with ESMTPSA id i2-20020a17090a138200b001cb6512b579sm10372119pja.44.2022.04.17.10.44.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Apr 2022 10:44:51 -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=/kQGH0Cy2HcRWOzQdszvWYCvmoLOtgBt5ZPwOUyma0Q=; b=wQAAsmyg3n5S4LCPwHVToO0VZ2joUjpYmEbZ+5t0AWJ0EgNje3FkibzaA+gW4ndzCp EMcj8aWHiRsksbK7rsBECqUAgNUt7DHZavxlvgUWi2cuamDnuRfAQZ2wadKYkGNDE4o+ uX9/JB/7NFYKHlD8d4kxFGGcYbDdeo1ua2n7otSJWjQE0IBfxC/woMGJHWi5iqtFqGLh jNYggpGlIR5kawCPT/E3aYUpJpBZNp/s4Yr9HSmzkmov03S+u5Loh1kDq9BjGVyDclgE cUjFYhpkSvZTXVpfBV79SMvSd7IouIHokZvdlFbGI5lxazmKjehWrbYzjKyvNpgg9r6M WBYg== 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=/kQGH0Cy2HcRWOzQdszvWYCvmoLOtgBt5ZPwOUyma0Q=; b=IaP6hXokvrA2AtAS+RoIsS0cI5JlYT4xNIAoCcOVoqcSUn3VuTSKYVhBSDW3WwELNJ 8SFjATCwfSCONyEVpfNdL52p31+CxPIqIGAaL/X8k7NX9GsYuLwb6pDMFykofOv4hYiz l3CddwE0utxJlJazBbDNZzRTgCnQ+0C77Mk3DX9PPri48YugLJRUE1uN7+BNqQVNzN4W XB1O2oefie4XP2z0v9eLLmSvc4OGSr43E5H+pcYV8CEyvUVbhGJNbk1PX8vPUPe6rrR6 LiVm4dp0Z5cq6fqWzVTxwpse21V1WVJCszxXr8hOinKJD2v2awYXwEX192w72uolPhnG ZBXQ== X-Gm-Message-State: AOAM532TAni9RTtOBVyMixZaPAPiUHTPuJ6ikQUbVEYAGHohOg5tLZsx PtRdmshpjLMXRFugkx6B4H+AlzsMmrDC9A== X-Google-Smtp-Source: ABdhPJxcs3UM5RWSpnFYg/ZuKXWa2HfYB5+ucs7+4AWJmJu+EkqyNvZxCVADm5KyKGk+s9r5qeP/Ew== X-Received: by 2002:a17:902:e0ca:b0:158:cc0a:44f7 with SMTP id e10-20020a170902e0ca00b00158cc0a44f7mr7343242pla.70.1650217491599; Sun, 17 Apr 2022 10:44:51 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 25/60] target/arm: Reorg CPAccessResult and access_check_cp_reg Date: Sun, 17 Apr 2022 10:43:51 -0700 Message-Id: <20220417174426.711829-26-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220417174426.711829-1-richard.henderson@linaro.org> References: <20220417174426.711829-1-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::1033; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1033.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: , Cc: qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1650219840845100001 Content-Type: text/plain; charset="utf-8" Rearrange the values of the enumerators of CPAccessResult so that we may directly extract the target el. For the two special cases in access_check_cp_reg, use CPAccessResult. Signed-off-by: Richard Henderson Reviewed-by: Alex Benn=C3=A9e Reviewed-by: Peter Maydell --- target/arm/cpregs.h | 26 ++++++++++++-------- target/arm/op_helper.c | 56 +++++++++++++++++++++--------------------- 2 files changed, 44 insertions(+), 38 deletions(-) diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h index 005aa2d3a5..700fcc1478 100644 --- a/target/arm/cpregs.h +++ b/target/arm/cpregs.h @@ -167,26 +167,32 @@ static inline bool cptype_valid(int cptype) typedef enum CPAccessResult { /* Access is permitted */ CP_ACCESS_OK =3D 0, + + /* + * Combined with one of the following, the low 2 bits indicate the + * target exception level. If 0, the exception is taken to the usual + * target EL (EL1 or PL1 if in EL0, otherwise to the current EL). + */ + CP_ACCESS_EL_MASK =3D 3, + /* * Access fails due to a configurable trap or enable which would * result in a categorized exception syndrome giving information about * the failing instruction (ie syndrome category 0x3, 0x4, 0x5, 0x6, - * 0xc or 0x18). The exception is taken to the usual target EL (EL1 or - * PL1 if in EL0, otherwise to the current EL). + * 0xc or 0x18). */ - CP_ACCESS_TRAP =3D 1, + CP_ACCESS_TRAP =3D (1 << 2), + CP_ACCESS_TRAP_EL2 =3D CP_ACCESS_TRAP | 2, + CP_ACCESS_TRAP_EL3 =3D CP_ACCESS_TRAP | 3, + /* * Access fails and results in an exception syndrome 0x0 ("uncategoriz= ed"). * Note that this is not a catch-all case -- the set of cases which may * result in this failure is specifically defined by the architecture. */ - CP_ACCESS_TRAP_UNCATEGORIZED =3D 2, - /* As CP_ACCESS_TRAP, but for traps directly to EL2 or EL3 */ - CP_ACCESS_TRAP_EL2 =3D 3, - CP_ACCESS_TRAP_EL3 =3D 4, - /* As CP_ACCESS_UNCATEGORIZED, but for traps directly to EL2 or EL3 */ - CP_ACCESS_TRAP_UNCATEGORIZED_EL2 =3D 5, - CP_ACCESS_TRAP_UNCATEGORIZED_EL3 =3D 6, + CP_ACCESS_TRAP_UNCATEGORIZED =3D (2 << 2), + CP_ACCESS_TRAP_UNCATEGORIZED_EL2 =3D CP_ACCESS_TRAP_UNCATEGORIZED | 2, + CP_ACCESS_TRAP_UNCATEGORIZED_EL3 =3D CP_ACCESS_TRAP_UNCATEGORIZED | 3, } CPAccessResult; =20 typedef struct ARMCPRegInfo ARMCPRegInfo; diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c index 67be91c732..76499ffa14 100644 --- a/target/arm/op_helper.c +++ b/target/arm/op_helper.c @@ -632,11 +632,13 @@ void HELPER(access_check_cp_reg)(CPUARMState *env, vo= id *rip, uint32_t syndrome, uint32_t isread) { const ARMCPRegInfo *ri =3D rip; + CPAccessResult res =3D CP_ACCESS_OK; int target_el; =20 if (arm_feature(env, ARM_FEATURE_XSCALE) && ri->cp < 14 && extract32(env->cp15.c15_cpar, ri->cp, 1) =3D=3D 0) { - raise_exception(env, EXCP_UDEF, syndrome, exception_target_el(env)= ); + res =3D CP_ACCESS_TRAP; + goto fail; } =20 /* @@ -655,48 +657,46 @@ void HELPER(access_check_cp_reg)(CPUARMState *env, vo= id *rip, uint32_t syndrome, mask &=3D ~((1 << 4) | (1 << 14)); =20 if (env->cp15.hstr_el2 & mask) { - target_el =3D 2; - goto exept; + res =3D CP_ACCESS_TRAP_EL2; + goto fail; } } =20 - if (!ri->accessfn) { + if (ri->accessfn) { + res =3D ri->accessfn(env, ri, isread); + } + if (likely(res =3D=3D CP_ACCESS_OK)) { return; } =20 - switch (ri->accessfn(env, ri, isread)) { - case CP_ACCESS_OK: - return; + fail: + switch (res & ~CP_ACCESS_EL_MASK) { case CP_ACCESS_TRAP: - target_el =3D exception_target_el(env); - break; - case CP_ACCESS_TRAP_EL2: - /* Requesting a trap to EL2 when we're in EL3 is - * a bug in the access function. - */ - assert(arm_current_el(env) !=3D 3); - target_el =3D 2; - break; - case CP_ACCESS_TRAP_EL3: - target_el =3D 3; break; case CP_ACCESS_TRAP_UNCATEGORIZED: - target_el =3D exception_target_el(env); - syndrome =3D syn_uncategorized(); - break; - case CP_ACCESS_TRAP_UNCATEGORIZED_EL2: - target_el =3D 2; - syndrome =3D syn_uncategorized(); - break; - case CP_ACCESS_TRAP_UNCATEGORIZED_EL3: - target_el =3D 3; syndrome =3D syn_uncategorized(); break; default: g_assert_not_reached(); } =20 -exept: + target_el =3D res & CP_ACCESS_EL_MASK; + switch (target_el) { + case 0: + target_el =3D exception_target_el(env); + break; + case 2: + assert(arm_current_el(env) !=3D 3); + assert(arm_is_el2_enabled(env)); + break; + case 3: + assert(arm_feature(env, ARM_FEATURE_EL3)); + break; + default: + /* No "direct" traps to EL1 */ + g_assert_not_reached(); + } + raise_exception(env, EXCP_UDEF, syndrome, target_el); } =20 --=20 2.25.1