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([2602:ae:1541:f901:c23d:b6:6be1:f147]) by smtp.gmail.com with ESMTPSA id jw1-20020a170903278100b0019cd1ee1523sm21670633plb.30.2023.03.28.15.58.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Mar 2023 15:58:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1680044292; 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=g05J8wW1HhmR3dbxLdTrvqKbK3sSXASxM+uo2e7n0jQ=; b=x5YOIhpuO7maSU67Ij2gFXqAZsVcRGecZYiD6K5d7sYMTiNjzL1xCYB3/INaWPJ8yf UFDfEnSGRKoouc7v4XqfYM6CKQl71C4okqUbYShbhi9aRg6VmrDh9tC3J1mtvfP3DDOc knQieXxlfy57hA4eLfL/OXSaovM+aoBVelukX+oSVtokz9aBhxBGD//lBaeQ4fLYQx+F 8u2m/f6I1e5NaULHUdmEEIKD3L92+dVhGCYVKoSzN20GUAElu+ZGrJeEKKBYQne7Jjgw e9GD15fymXEL9nnfWSIWeqAmL88qg+q73szc1aez8WO6tCYiO1NNf6fIklQ/SIhNFiyQ 6AMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680044292; 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=g05J8wW1HhmR3dbxLdTrvqKbK3sSXASxM+uo2e7n0jQ=; b=4eivqGKfDX1tKHaXZTXNYqW+S/Ex0Imm6IPAYIJi1hkI4u3/DGpHrDQCPCzeynyVgi RQ88sf2U71/azBzCVnnFyak//+q0wGSuQmGlBUeOsJrgyKcon212iVtziqJGCEl/eUOy Xj4pYQ9lghYA0ralipXXzA5g2sgUlev6a5nT5F2ExrGmIEICiDOp9jHXCX1rW9TkBERb fG42dFxRmHgLOzCT3C9o3a26bW2OMiLHB1br4NXRPqwo8yFZa2FP3NRUX6p6NaUdMrsP /ZbfMWS7L259AZxs/3ZNKMUuWd373V6xwniTqu4bo8F8xmivzzDnvVctTxlXxNfuLRnD BCZg== X-Gm-Message-State: AAQBX9ehS8rZmQpj50TCsUxdQ7lcLu6bUfl4QIXSz4f4SYl5NWYk8Xdu 6fAR5A1e9f/Ji8V2q2vws7lw8M8hCslYKCzF9b8= X-Google-Smtp-Source: AKy350bwuFqkNcD1nrQTNY3y4xJbEfCP+p45iKH3+CjZNgJFkFLd1jI9DPdqCDE/i32NJPhooiTZZw== X-Received: by 2002:a17:903:11cd:b0:1a2:35f3:360f with SMTP id q13-20020a17090311cd00b001a235f3360fmr14037871plh.15.1680044292516; Tue, 28 Mar 2023 15:58:12 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PULL 05/15] accel/tcg: Pass last not end to page_reset_target_data Date: Tue, 28 Mar 2023 15:57:56 -0700 Message-Id: <20230328225806.2278728-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230328225806.2278728-1-richard.henderson@linaro.org> References: <20230328225806.2278728-1-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=2607:f8b0:4864:20::634; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x634.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: 1680044358294100003 Pass the address of the last byte to be changed, rather than the first address past the last byte. This avoids overflow when the last page of the address space is involved. Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Richard Henderson --- include/exec/cpu-all.h | 2 +- accel/tcg/user-exec.c | 11 +++++------ linux-user/mmap.c | 2 +- 3 files changed, 7 insertions(+), 8 deletions(-) diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index a2662b1e83..64cb62dc54 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -277,7 +277,7 @@ int walk_memory_regions(void *, walk_memory_regions_fn); =20 int page_get_flags(target_ulong address); void page_set_flags(target_ulong start, target_ulong last, int flags); -void page_reset_target_data(target_ulong start, target_ulong end); +void page_reset_target_data(target_ulong start, target_ulong last); int page_check_range(target_ulong start, target_ulong len, int flags); =20 /** diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c index 035f8096b2..20b6fc2f6e 100644 --- a/accel/tcg/user-exec.c +++ b/accel/tcg/user-exec.c @@ -508,7 +508,7 @@ void page_set_flags(target_ulong start, target_ulong la= st, int flags) } =20 if (!flags || reset) { - page_reset_target_data(start, last + 1); + page_reset_target_data(start, last); inval_tb |=3D pageflags_unset(start, last); } if (flags) { @@ -814,15 +814,14 @@ typedef struct TargetPageDataNode { =20 static IntervalTreeRoot targetdata_root; =20 -void page_reset_target_data(target_ulong start, target_ulong end) +void page_reset_target_data(target_ulong start, target_ulong last) { IntervalTreeNode *n, *next; - target_ulong last; =20 assert_memory_lock(); =20 - start =3D start & TARGET_PAGE_MASK; - last =3D TARGET_PAGE_ALIGN(end) - 1; + start &=3D TARGET_PAGE_MASK; + last |=3D ~TARGET_PAGE_MASK; =20 for (n =3D interval_tree_iter_first(&targetdata_root, start, last), next =3D n ? interval_tree_iter_next(n, start, last) : NULL; @@ -885,7 +884,7 @@ void *page_get_target_data(target_ulong address) return t->data[(page - region) >> TARGET_PAGE_BITS]; } #else -void page_reset_target_data(target_ulong start, target_ulong end) { } +void page_reset_target_data(target_ulong start, target_ulong last) { } #endif /* TARGET_PAGE_DATA_SIZE */ =20 /* The softmmu versions of these helpers are in cputlb.c. */ diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 1d07ff5d2c..995146f60d 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -946,7 +946,7 @@ abi_long target_madvise(abi_ulong start, abi_ulong len_= in, int advice) if (can_passthrough_madvise(start, end)) { ret =3D get_errno(madvise(g2h_untagged(start), len, advice)); if ((advice =3D=3D MADV_DONTNEED) && (ret =3D=3D 0)) { - page_reset_target_data(start, start + len); + page_reset_target_data(start, start + len - 1); } } } --=20 2.34.1