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[97.113.7.119]) by smtp.gmail.com with ESMTPSA id z4sm6452921pjt.17.2019.09.21.20.55.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 21 Sep 2019 20:55:20 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 16/20] cputlb: Handle TLB_NOTDIRTY in probe_access Date: Sat, 21 Sep 2019 20:54:54 -0700 Message-Id: <20190922035458.14879-17-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190922035458.14879-1-richard.henderson@linaro.org> References: <20190922035458.14879-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::642 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, alex.bennee@linaro.org, stefanha@redhat.com, david@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We can use notdirty_write for the write and return a valid host pointer for this case. Signed-off-by: Richard Henderson --- accel/tcg/cputlb.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index 6f685cb93a..6f4096bd0d 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1167,16 +1167,24 @@ void *probe_access(CPUArchState *env, target_ulong addr, int size, return NULL; } - /* Handle watchpoints. */ - if (tlb_addr & TLB_WATCHPOINT) { - cpu_check_watchpoint(env_cpu(env), addr, size, - env_tlb(env)->d[mmu_idx].iotlb[index].attrs, - wp_access, retaddr); - } + if (unlikely(tlb_addr & TLB_FLAGS_MASK)) { + CPUIOTLBEntry *iotlbentry = &env_tlb(env)->d[mmu_idx].iotlb[index]; - /* Reject I/O access, or other required slow-path. */ - if (tlb_addr & (TLB_NOTDIRTY | TLB_MMIO | TLB_BSWAP | TLB_ROM)) { - return NULL; + /* Reject I/O access, or other required slow-path. */ + if (tlb_addr & (TLB_MMIO | TLB_BSWAP | TLB_ROM)) { + return NULL; + } + + /* Handle watchpoints. */ + if (tlb_addr & TLB_WATCHPOINT) { + cpu_check_watchpoint(env_cpu(env), addr, size, + iotlbentry->attrs, wp_access, retaddr); + } + + /* Handle clean RAM pages. */ + if (tlb_addr & TLB_NOTDIRTY) { + notdirty_write(env_cpu(env), addr, size, iotlbentry, retaddr); + } } return (void *)((uintptr_t)addr + entry->addend); -- 2.17.1