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Wed, 21 Jun 2023 05:19:06 -0700 (PDT) Received: from stoup.lan ([176.176.128.70]) by smtp.gmail.com with ESMTPSA id s6-20020a056402014600b0051bdf152295sm543176edu.76.2023.06.21.05.19.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Jun 2023 05:19:06 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Subject: [PATCH v2 2/9] accel/tcg: Move TLB_WATCHPOINT to TLB_SLOW_FLAGS_MASK Date: Wed, 21 Jun 2023 14:18:55 +0200 Message-Id: <20230621121902.1392277-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230621121902.1392277-1-richard.henderson@linaro.org> References: <20230621121902.1392277-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::12f; envelope-from=richard.henderson@linaro.org; helo=mail-lf1-x12f.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: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This frees up one bit of the primary tlb flags without impacting the TLB_NOTDIRTY logic. Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé --- include/exec/cpu-all.h | 8 ++++---- accel/tcg/cputlb.c | 18 ++++++++++++++---- 2 files changed, 18 insertions(+), 8 deletions(-) diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 4422f4bb07..b5618613cc 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -325,8 +325,6 @@ CPUArchState *cpu_copy(CPUArchState *env); #define TLB_NOTDIRTY (1 << (TARGET_PAGE_BITS_MIN - 2)) /* Set if TLB entry is an IO callback. */ #define TLB_MMIO (1 << (TARGET_PAGE_BITS_MIN - 3)) -/* Set if TLB entry contains a watchpoint. */ -#define TLB_WATCHPOINT (1 << (TARGET_PAGE_BITS_MIN - 4)) /* Set if the slow path must be used; more flags in CPUTLBEntryFull. */ #define TLB_FORCE_SLOW (1 << (TARGET_PAGE_BITS_MIN - 5)) /* Set if TLB entry writes ignored. */ @@ -338,7 +336,7 @@ CPUArchState *cpu_copy(CPUArchState *env); */ #define TLB_FLAGS_MASK \ (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO \ - | TLB_WATCHPOINT | TLB_FORCE_SLOW | TLB_DISCARD_WRITE) + | TLB_FORCE_SLOW | TLB_DISCARD_WRITE) /* * Flags stored in CPUTLBEntryFull.slow_flags[x]. @@ -346,8 +344,10 @@ CPUArchState *cpu_copy(CPUArchState *env); */ /* Set if TLB entry requires byte swap. */ #define TLB_BSWAP (1 << 0) +/* Set if TLB entry contains a watchpoint. */ +#define TLB_WATCHPOINT (1 << 1) -#define TLB_SLOW_FLAGS_MASK TLB_BSWAP +#define TLB_SLOW_FLAGS_MASK (TLB_BSWAP | TLB_WATCHPOINT) /* The two sets of flags must not overlap. */ QEMU_BUILD_BUG_ON(TLB_FLAGS_MASK & TLB_SLOW_FLAGS_MASK); diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index b40ce5ea0f..152c4e9994 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1984,7 +1984,7 @@ static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr, */ goto stop_the_world; } - /* Collect TLB_WATCHPOINT for read. */ + /* Collect tlb flags for read. */ tlb_addr |= tlbe->addr_read; /* Notice an IO access or a needs-MMU-lookup access */ @@ -2001,9 +2001,19 @@ static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr, notdirty_write(env_cpu(env), addr, size, full, retaddr); } - if (unlikely(tlb_addr & TLB_WATCHPOINT)) { - cpu_check_watchpoint(env_cpu(env), addr, size, full->attrs, - BP_MEM_READ | BP_MEM_WRITE, retaddr); + if (unlikely(tlb_addr & TLB_FORCE_SLOW)) { + int wp_flags = 0; + + if (full->slow_flags[MMU_DATA_STORE] & TLB_WATCHPOINT) { + wp_flags |= BP_MEM_WRITE; + } + if (full->slow_flags[MMU_DATA_LOAD] & TLB_WATCHPOINT) { + wp_flags |= BP_MEM_READ; + } + if (wp_flags) { + cpu_check_watchpoint(env_cpu(env), addr, size, + full->attrs, wp_flags, retaddr); + } } return hostaddr;