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[93.51.222.138]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b04323984ffsm679797466b.64.2025.09.03.06.09.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 03 Sep 2025 06:09:19 -0700 (PDT) Message-ID: <1b542ce0-33f9-4967-8402-53ce9c2e0d96@linaro.org> Date: Wed, 3 Sep 2025 15:09:18 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 04/12] target/loongarch: Update TLB index selection method To: Bibo Mao , Song Gao , =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= Cc: Jiaxun Yang , qemu-devel@nongnu.org References: <20250903084827.3085911-1-maobibo@loongson.cn> <20250903084827.3085911-5-maobibo@loongson.cn> From: Richard Henderson Content-Language: en-US In-Reply-To: <20250903084827.3085911-5-maobibo@loongson.cn> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2a00:1450:4864:20::630; envelope-from=richard.henderson@linaro.org; helo=mail-ej1-x630.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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 9/3/25 10:48, Bibo Mao wrote: > With function helper_tlbfill(), since there is no suitable TLB entry, > new TLB will be added and invalidate one old TLB entry. The old TLB > entry index is selected randomly, instead it can be optimized as > following: > 1. invalid TLB entry can be selected at first. > 2. TLB entry with other ASID can be selected secondly > 3. random method is used by last. > > Signed-off-by: Bibo Mao > --- > target/loongarch/tcg/tlb_helper.c | 49 ++++++++++++++++++++++++++----- > 1 file changed, 42 insertions(+), 7 deletions(-) Reviewed-by: Richard Henderson r~