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([172.58.111.133]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-30b8e3c9b32sm71031fac.24.2025.08.02.16.30.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Aug 2025 16:30:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1754177438; x=1754782238; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=FnUxL1l7S/Ogxnuq3Rb6QT2pyV+tUJh+XdG2c+057PU=; b=qYnjF8iwUZd+22UOyM/LPOOz3R6DTwT4qypIf+7F0o5EoE3cZukr2PmFqsUIWAO0kr MAJs39QszrvARlcXlNq/H+IlcYDTtVj9CEFBZvAVjzfmOT4X6KbdArCnlDdFWS3eOk/K YNXfzIcS0nX6ECXXXVg4HSO1LjMXIQPhEbxSn9i7MQoB0tlWPXUQ74bwG3/1MPcrObC7 GI9wIZxmWRzHiMGtKvFFOTCE+6QP+ipNn643qGNZ/kapd1NU1cB8j8CPF3LGiGNl0DEK KO5btQmwOg8RJKUaIIdG3n4sdwYO9dkLopYD8/LAHKYPGLjbJmOonJeFaEKIiYNTSx/L 5n1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754177438; x=1754782238; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=FnUxL1l7S/Ogxnuq3Rb6QT2pyV+tUJh+XdG2c+057PU=; b=NvCX++Y2JUUooN33TkH4NDY+1E2ojt0MXdR3pJTIglKguXOcogdVOofEJqcwTWKby/ JEKlbPkmcW/+DzG+LGXY6NFOaxmTI4uW6jbjd2hsTB56uXKUrlzJES/QlJyFUoacYP0C j6TTh5vcmS2/OAYSTF6TYx2xHxGr4nkwlSw+2eX8csz1du8aFJS1IMjIaTGK2y3KSqXW OU1XVWI+LtdI1agRlHEoACwrFrR/0/j4q04AhGENHQYeuHrAgmUdOJxD/TuKG7+UKCra oWgbUKP6pAnkcWxJG2pwSpDLvLFZqbqTrO3RvUm8fxkv+2WRTUfDCiJQZ+HJXZ1D4Dra lLmg== X-Gm-Message-State: AOJu0YyvfIIR4S4cpkwPct23Bk32qYX4isIiMabal6+EwjWIKDyhrUCC DqtblMX5/Iy91Nvv5hpGxCvKUpwvWK75GTGXex+6Rxe2+S7zgKuACFoRMn86NaZu+TBF77EMdmy MSi+eFg8= X-Gm-Gg: ASbGncshNjdcbk7qXZDyAOJBgUpzvetZklbyp0fr45O7lS+8XpdCv3zPThD9+D+Vo8y iq329+kBWkv54GugD1kKHHep2Lx2EbEOSUVC8UHJCx040+VKK55JFodueHRyhqiW/1NpHUOxXCc EyGk6XsSXqlYJ4RFUaVhM0iklMf/cRAFQAEHdIBH3VNWy4WnNfcl8An9Jk39oEomPpaEu1qdupC j1U0NqZyPdzT3VDEDewyW2bfPloaHlIjFmOEBRFAvfxBM31naa7Gq7QdYKndR6PTTkB1/0WSrPe MjqMBvsMTzqqrw+BdlG0fBLF+Tuj5yhIFOp8WdZ3wTzFrBpHjOKagCA+HzvKN/E2iKTgN8kucvi G1FV3cjBX7qCX/7oQIWcFFwVCjIBLcg+5jFSXpjdNvyl4dEhPVeJey581okhQesU= X-Google-Smtp-Source: AGHT+IHoiu6XO5QRvLVQQTNGMtzF4JzaCSclU5xAcnXUA2FCeurFHBRdoFP9byfWuBF8Evciwx1obg== X-Received: by 2002:a05:6871:a701:b0:30b:85a0:eb66 with SMTP id 586e51a60fabf-30b85a14575mr529391fac.12.1754177438431; Sat, 02 Aug 2025 16:30:38 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Pierrick Bouvier Subject: [PATCH v2 08/85] target/arm: Skip AF and DB updates for AccessType_AT Date: Sun, 3 Aug 2025 09:28:36 +1000 Message-ID: <20250802232953.413294-9-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250802232953.413294-1-richard.henderson@linaro.org> References: <20250802232953.413294-1-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=2001:4860:4864:20::29; envelope-from=richard.henderson@linaro.org; helo=mail-oa1-x29.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 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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1754177756181124100 Content-Type: text/plain; charset="utf-8" We are required to skip DB update for AT instructions, and we are allowed to skip AF updates. Choose to skip both. Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson --- target/arm/ptw.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/target/arm/ptw.c b/target/arm/ptw.c index 1866c494ef..efbad7af1f 100644 --- a/target/arm/ptw.c +++ b/target/arm/ptw.c @@ -58,6 +58,12 @@ typedef struct S1Translate { * and will not change the state of the softmmu TLBs. */ bool in_debug; + /* + * in_at: is this AccessType_AT? + * This is also set for debug, because at heart that is also + * an address translation, and simplifies a test. + */ + bool in_at; /* * If this is stage 2 of a stage 1+2 page table walk, then this must * be true if stage 1 is an EL0 access; otherwise this is ignored. @@ -1929,7 +1935,12 @@ static bool get_phys_addr_lpae(CPUARMState *env, S1T= ranslate *ptw, descaddr &=3D ~(hwaddr)(page_size - 1); descaddr |=3D (address & (page_size - 1)); =20 - if (likely(!ptw->in_debug)) { + /* + * For AccessType_AT, DB is not updated (AArch64.SetDirtyFlag), + * and it is IMPLEMENTATION DEFINED whether AF is updated + * (AArch64.SetAccessFlag; qemu chooses to not update). + */ + if (likely(!ptw->in_at)) { /* * Access flag. * If HA is enabled, prepare to update the descriptor below. @@ -3553,6 +3564,7 @@ bool get_phys_addr_for_at(CPUARMState *env, vaddr add= ress, S1Translate ptw =3D { .in_mmu_idx =3D mmu_idx, .in_space =3D space, + .in_at =3D true, .in_prot_check =3D prot_check, }; /* @@ -3653,6 +3665,7 @@ static hwaddr arm_cpu_get_phys_page(CPUARMState *env,= vaddr addr, .in_mmu_idx =3D mmu_idx, .in_space =3D arm_mmu_idx_to_security_space(env, mmu_idx), .in_debug =3D true, + .in_at =3D true, .in_prot_check =3D 0, }; GetPhysAddrResult res =3D {}; --=20 2.43.0