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Mon, 26 Jun 2023 08:39:59 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PULL 21/22] accel/tcg: Move TLB_WATCHPOINT to TLB_SLOW_FLAGS_MASK Date: Mon, 26 Jun 2023 17:39:44 +0200 Message-Id: <20230626153945.76180-22-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230626153945.76180-1-richard.henderson@linaro.org> References: <20230626153945.76180-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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=2a00:1450:4864:20::429; envelope-from=richard.henderson@linaro.org; helo=mail-wr1-x429.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1687794336719100001 This frees up one bit of the primary tlb flags without impacting the TLB_NOTDIRTY logic. Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Richard Henderson --- 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) =20 /* * 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) =20 -#define TLB_SLOW_FLAGS_MASK TLB_BSWAP +#define TLB_SLOW_FLAGS_MASK (TLB_BSWAP | TLB_WATCHPOINT) =20 /* 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 3671846744..5b51eff5a4 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1981,7 +1981,7 @@ static void *atomic_mmu_lookup(CPUArchState *env, vad= dr addr, MemOpIdx oi, */ goto stop_the_world; } - /* Collect TLB_WATCHPOINT for read. */ + /* Collect tlb flags for read. */ tlb_addr |=3D tlbe->addr_read; =20 /* Notice an IO access or a needs-MMU-lookup access */ @@ -1998,9 +1998,19 @@ static void *atomic_mmu_lookup(CPUArchState *env, va= ddr addr, MemOpIdx oi, notdirty_write(env_cpu(env), addr, size, full, retaddr); } =20 - 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 =3D 0; + + if (full->slow_flags[MMU_DATA_STORE] & TLB_WATCHPOINT) { + wp_flags |=3D BP_MEM_WRITE; + } + if (full->slow_flags[MMU_DATA_LOAD] & TLB_WATCHPOINT) { + wp_flags |=3D BP_MEM_READ; + } + if (wp_flags) { + cpu_check_watchpoint(env_cpu(env), addr, size, + full->attrs, wp_flags, retaddr); + } } =20 return hostaddr; --=20 2.34.1