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[174.21.81.121]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71df0d65278sm7881094b3a.160.2024.10.09.08.09.09 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Oct 2024 08:09:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1728486550; x=1729091350; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=ORHeYVe4iZoRiXmNScxIZEQWJj516Vk6OjgxA97UeGU=; b=D7Y1nobLswka6lcLLAeHIPi92RwnnRr6EvJyYh1yV9tKHzkllpcWrrxnXtMOD4vZ27 rxbL4I0UWgEFueTwDi4yztQoD+xenkK3Ma2hF4KKwTOTyQx9RcAHMzndaydrqzrH39Vx nCcVjEp2071PAOMr7MbkY6V9dqVeSkLah8jwdUyy4v0f0Rq9bnOezVIzZuOf72YGoSJj KMBX1YcHEWGYc5CGPy1OXEp1s0pSzlNmnpT4EKZNI18uCqXYIGVGSdNvnYCzYQGJNOk4 QSxH9FNi9mIpWGR8rcWMup0AipugkEEsXklYC3peFJZKUzwNZF/BkVIBbSktIMrrrUcT gcoQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728486550; x=1729091350; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ORHeYVe4iZoRiXmNScxIZEQWJj516Vk6OjgxA97UeGU=; b=NOK0Y/BJC4oRHHRSN4PyNmdfVKBApWob9YxqlCGfpr7j2JV5x5EC2smZzVux2Kr2sF bAAqMl039skeHtxhGDNnGW2TCtrJGl5Z92W1uMFdJ65NKX3ukPofqrfH8FsyXqTZK3/m Pc4mTw3lf8mHKHS9DMXt7SI7W+mPu9weHRr8AWo2yx8cskfO1wmRxnV6/i2fIcvBpCWr Gvz/wzgGuhsTzlhg2P0jojAK7g9+U5gMUfpiL+zzDbPI+A45MVSH6/opOl8Cg8RyeYtp wltEOsLqzlBpxXNC2sw3RLcYcMdrS2FJaOQkW8QA15rhN90yHKuZkHRYzYR9VZ1Cl16K +Aag== X-Gm-Message-State: AOJu0YyNud5fxZaa9Zdx7AQfS0KRbDrmKftO57R6d/rx8ketRzQ1izWz 2kCuQxPBsALbzDOozUqfk3cKq0w0Ctg9+hu0o23io5jEAH4OjBvLOFI2Bjj7Fz3MtyyPrGYV/qv a X-Google-Smtp-Source: AGHT+IGRfyvjUUTQW5hOt1aaof9W9iC27riiWVSa+dVzqAcXieD0RNImwpKk+cy+tfxNzQvb8xhLVg== X-Received: by 2002:a05:6a20:9e4c:b0:1d2:e8d8:dd46 with SMTP id adf61e73a8af0-1d8a3c005a2mr4284483637.15.1728486550037; Wed, 09 Oct 2024 08:09:10 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 15/23] accel/tcg: Remove the victim tlb Date: Wed, 9 Oct 2024 08:08:47 -0700 Message-ID: <20241009150855.804605-16-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241009150855.804605-1-richard.henderson@linaro.org> References: <20241009150855.804605-1-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::432; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x432.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: 1728486576961116600 Content-Type: text/plain; charset="utf-8" This has been functionally replaced by the IntervalTree. Signed-off-by: Richard Henderson Reviewed-by: Pierrick Bouvier --- include/hw/core/cpu.h | 8 ------ accel/tcg/cputlb.c | 64 ------------------------------------------- 2 files changed, 72 deletions(-) diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index b567abe3e2..87b864f5c4 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -198,9 +198,6 @@ struct CPUClass { */ #define NB_MMU_MODES 16 =20 -/* Use a fully associative victim tlb of 8 entries. */ -#define CPU_VTLB_SIZE 8 - /* * The full TLB entry, which is not accessed by generated TCG code, * so the layout is not as critical as that of CPUTLBEntry. This is @@ -282,11 +279,6 @@ typedef struct CPUTLBDesc { /* maximum number of entries observed in the window */ size_t window_max_entries; size_t n_used_entries; - /* The next index to use in the tlb victim table. */ - size_t vindex; - /* The tlb victim table, in two parts. */ - CPUTLBEntry vtable[CPU_VTLB_SIZE]; - CPUTLBEntryFull vfulltlb[CPU_VTLB_SIZE]; CPUTLBEntryFull *fulltlb; /* All active tlb entries for this address space. */ IntervalTreeRoot iroot; diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index b10b0a357c..561f66c723 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -328,8 +328,6 @@ static void tlb_mmu_flush_locked(CPUTLBDesc *desc, CPUT= LBDescFast *fast) tlbfast_flush_locked(desc, fast); desc->large_page_addr =3D -1; desc->large_page_mask =3D -1; - desc->vindex =3D 0; - memset(desc->vtable, -1, sizeof(desc->vtable)); interval_tree_free_nodes(&desc->iroot, offsetof(CPUTLBEntryTree, itree= )); } =20 @@ -501,15 +499,6 @@ static inline bool tlb_hit_page_anyprot(CPUTLBEntry *t= lb_entry, vaddr page) return tlb_hit_page_mask_anyprot(tlb_entry, page, -1); } =20 -/** - * tlb_entry_is_empty - return true if the entry is not in use - * @te: pointer to CPUTLBEntry - */ -static inline bool tlb_entry_is_empty(const CPUTLBEntry *te) -{ - return te->addr_read =3D=3D -1 && te->addr_write =3D=3D -1 && te->addr= _code =3D=3D -1; -} - /* Called with tlb_c.lock held */ static bool tlb_flush_entry_mask_locked(CPUTLBEntry *tlb_entry, vaddr page, @@ -527,28 +516,6 @@ static inline bool tlb_flush_entry_locked(CPUTLBEntry = *tlb_entry, vaddr page) return tlb_flush_entry_mask_locked(tlb_entry, page, -1); } =20 -/* Called with tlb_c.lock held */ -static void tlb_flush_vtlb_page_mask_locked(CPUState *cpu, int mmu_idx, - vaddr page, - vaddr mask) -{ - CPUTLBDesc *d =3D &cpu->neg.tlb.d[mmu_idx]; - int k; - - assert_cpu_is_self(cpu); - for (k =3D 0; k < CPU_VTLB_SIZE; k++) { - if (tlb_flush_entry_mask_locked(&d->vtable[k], page, mask)) { - tlb_n_used_entries_dec(cpu, mmu_idx); - } - } -} - -static inline void tlb_flush_vtlb_page_locked(CPUState *cpu, int mmu_idx, - vaddr page) -{ - tlb_flush_vtlb_page_mask_locked(cpu, mmu_idx, page, -1); -} - static void tlbfast_flush_range_locked(CPUTLBDesc *desc, CPUTLBDescFast *f= ast, vaddr addr, vaddr len, vaddr mask) { @@ -593,7 +560,6 @@ static void tlb_flush_page_locked(CPUState *cpu, int mi= dx, vaddr page) =20 tlbfast_flush_range_locked(desc, &cpu->neg.tlb.f[midx], page, TARGET_PAGE_SIZE, -1); - tlb_flush_vtlb_page_locked(cpu, midx, page); =20 node =3D tlbtree_lookup_addr(desc, page); if (node) { @@ -769,11 +735,6 @@ static void tlb_flush_range_locked(CPUState *cpu, int = midx, =20 tlbfast_flush_range_locked(d, f, addr, len, mask); =20 - for (vaddr i =3D 0; i < len; i +=3D TARGET_PAGE_SIZE) { - vaddr page =3D addr + i; - tlb_flush_vtlb_page_mask_locked(cpu, midx, page, mask); - } - addr_mask =3D addr & mask; last_mask =3D addr_mask + len - 1; last_imask =3D last_mask | ~mask; @@ -1031,10 +992,6 @@ void tlb_reset_dirty(CPUState *cpu, ram_addr_t start1= , ram_addr_t length) tlb_reset_dirty_range_locked(&fast->table[i], start1, length); } =20 - for (size_t i =3D 0; i < CPU_VTLB_SIZE; i++) { - tlb_reset_dirty_range_locked(&desc->vtable[i], start1, length); - } - for (CPUTLBEntryTree *t =3D tlbtree_lookup_range(desc, 0, -1); t; t =3D tlbtree_lookup_range_next(t, 0, -1)) { tlb_reset_dirty_range_locked(&t->copy, start1, length); @@ -1068,10 +1025,6 @@ static void tlb_set_dirty(CPUState *cpu, vaddr addr) =20 tlb_set_dirty1_locked(tlb_entry(cpu, mmu_idx, addr), addr); =20 - for (int k =3D 0; k < CPU_VTLB_SIZE; k++) { - tlb_set_dirty1_locked(&desc->vtable[k], addr); - } - node =3D tlbtree_lookup_addr(desc, addr); if (node) { tlb_set_dirty1_locked(&node->copy, addr); @@ -1230,23 +1183,6 @@ void tlb_set_page_full(CPUState *cpu, int mmu_idx, /* Note that the tlb is no longer clean. */ tlb->c.dirty |=3D 1 << mmu_idx; =20 - /* Make sure there's no cached translation for the new page. */ - tlb_flush_vtlb_page_locked(cpu, mmu_idx, addr_page); - - /* - * Only evict the old entry to the victim tlb if it's for a - * different page; otherwise just overwrite the stale data. - */ - if (!tlb_hit_page_anyprot(te, addr_page) && !tlb_entry_is_empty(te)) { - unsigned vidx =3D desc->vindex++ % CPU_VTLB_SIZE; - CPUTLBEntry *tv =3D &desc->vtable[vidx]; - - /* Evict the old entry into the victim tlb. */ - copy_tlb_helper_locked(tv, te); - desc->vfulltlb[vidx] =3D desc->fulltlb[index]; - tlb_n_used_entries_dec(cpu, mmu_idx); - } - /* Replace an old IntervalTree entry, or create a new one. */ node =3D tlbtree_lookup_addr(desc, addr_page); if (!node) { --=20 2.43.0