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[71.212.47.143]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-30a476267e0sm1384573a91.39.2025.05.01.14.21.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 May 2025 14:21:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1746134481; x=1746739281; 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=q8/gUh8ns0OI2KXninhYbAotAkB5LmkpT0e10M7S7xU=; b=j5b+3fwd04ZHbMTDfk3PN043Sy5sg2QsmP8B8Ut01UTXJOjj4nTIohVhKhaqBVCTXV sCy91v347pSmFV8p5B4VcCad+IrR8PYKTG0yX6ncGyHIfm2lF78gizTLJqornb0mq793 QasifpzfRk0ZQ6DJBeIpLrndyJGmKVo+fR78b6gMAMAPFSGmJUK7ap5s2KR0mM3GSm0b QYScUR7KB46g3m5n/YXJQGzzDiOmn4Ng0ZiGj9o+En07SjJfCdzmRQ5+BobtZ8L+pBuC CAFAZboASXth+3TQrxzUfrSVHFHVLFbh4vQ7RFfH1rpec+07PxIfkj23zhustn6qXhsg nFPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746134481; x=1746739281; 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=q8/gUh8ns0OI2KXninhYbAotAkB5LmkpT0e10M7S7xU=; b=Cr1XcR1sLjakX28qWMIqt8dwMf1nhL8RTv749GPX6FDp5unNYuw+BVVZG6fvI9meh2 Vm+pvZjR/m5D9qy3PLwi5/M64MqT4F66+k4u88Y8GNx9WT5RGRXUkr4LjvmAhTAUe93F 1eprCFF20fxPxjQCe9k//Jxa8MiKOqxBvpw/NlGW2/isOm3hgo48LSQAtm6CifhA8xUD oDn3z4vb4nBRJCMqN/x7BhgrK03lGfVT536TxWhxOmDyJltyAP0OOZKbz0QMRJyVUjwJ KN7iiZq0KOW9jqsGWUd2b6ab3+SarxwkKSnnZhAhlCNphbxFRNHytaWFu817ShaXnvgM 2CMQ== X-Gm-Message-State: AOJu0YyIEaHxoD00Ois7VsDMzA2dhR0tTpakk6pdFoDuk3hZeNpeG/Fi MQVem64OkE3CprWSeHunaJyYMTZZNQNYCvxKnPG0BRNMM6iZxc7avVFg263waKxE+aGfYHxthII q X-Gm-Gg: ASbGncuV8cnalNNi0H6tYD7TCzcT9f8XqU+2z7UEfsy3owa5gcPHOVgm5QGOm1wSOFY 2M7cLcOVc/VhZtRWQ7YBQT8OqfDxGCPVa2yzfUKU8RYOZjlt8hoLU/n2iBX4TNYIrHBMy++PRxD t0Z93CongBf5hsQ8R4stqduZ1ihwShDpCwg3rQ4O1hIJ8xNx4n2IsWrcMR55vfGZ+irY37BD5wA brMnsBHYy1gyZ+HJPLVA/A8Hgw5K/y3+og7whewcPRCI4X9KgBtKeWEZFkE5L97H8qRCXpPjVnH TYszC8fOtscKpnvDT2ytLjsJG6FwwLojJMAWOKdOwRIMgqUmLFNPTO8nUtpC0cYKGp3QImFadZQ = X-Google-Smtp-Source: AGHT+IFFSRRRp9YOiVdtJA9S8k8T64pH04xqkieXgILhhGjBcammyjlwsBFiBRd1ZqVlDpzgVgf2CQ== X-Received: by 2002:a17:90b:4e8e:b0:2ff:53ad:a0ec with SMTP id 98e67ed59e1d1-30a4e5d58e3mr802224a91.21.1746134481210; Thu, 01 May 2025 14:21:21 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: Pierrick Bouvier Subject: [PULL 08/59] accel/tcg: Simplify CPU_TLB_DYN_MAX_BITS Date: Thu, 1 May 2025 14:20:22 -0700 Message-ID: <20250501212113.2961531-9-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250501212113.2961531-1-richard.henderson@linaro.org> References: <20250501212113.2961531-1-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::532; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x532.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: 1746135014773019100 Content-Type: text/plain; charset="utf-8" Stop taking TARGET_VIRT_ADDR_SPACE_BITS into account. Since we currently bound CPU_TLB_DYN_MAX_BITS to 22, the new bound with a 4k page size is 20, which isn't so different. Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson --- accel/tcg/tlb-bounds.h | 21 +-------------------- 1 file changed, 1 insertion(+), 20 deletions(-) diff --git a/accel/tcg/tlb-bounds.h b/accel/tcg/tlb-bounds.h index efd34d4793..f83d9ac9ee 100644 --- a/accel/tcg/tlb-bounds.h +++ b/accel/tcg/tlb-bounds.h @@ -7,26 +7,7 @@ #define ACCEL_TCG_TLB_BOUNDS_H =20 #define CPU_TLB_DYN_MIN_BITS 6 +#define CPU_TLB_DYN_MAX_BITS (32 - TARGET_PAGE_BITS) #define CPU_TLB_DYN_DEFAULT_BITS 8 =20 -# if HOST_LONG_BITS =3D=3D 32 -/* Make sure we do not require a double-word shift for the TLB load */ -# define CPU_TLB_DYN_MAX_BITS (32 - TARGET_PAGE_BITS) -# else /* HOST_LONG_BITS =3D=3D 64 */ -/* - * Assuming TARGET_PAGE_BITS=3D=3D12, with 2**22 entries we can cover 2**(= 22+12) =3D=3D - * 2**34 =3D=3D 16G of address space. This is roughly what one would expec= t a - * TLB to cover in a modern (as of 2018) x86_64 CPU. For instance, Intel - * Skylake's Level-2 STLB has 16 1G entries. - * Also, make sure we do not size the TLB past the guest's address space. - */ -# ifdef TARGET_PAGE_BITS_VARY -# define CPU_TLB_DYN_MAX_BITS \ - MIN(22, TARGET_VIRT_ADDR_SPACE_BITS - TARGET_PAGE_BITS) -# else -# define CPU_TLB_DYN_MAX_BITS \ - MIN_CONST(22, TARGET_VIRT_ADDR_SPACE_BITS - TARGET_PAGE_BITS) -# endif -# endif - #endif /* ACCEL_TCG_TLB_BOUNDS_H */ --=20 2.43.0