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[187.189.51.144]) by smtp.gmail.com with ESMTPSA id t24sm3940146oou.4.2020.12.14.06.04.17 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Dec 2020 06:04:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=vrSqwZKXMyaSyRVRtm4Hh+vS+LTe1orOUMFlnbJhADM=; b=ZTrJ9csEkHzMvHpyiiud4BUrYZ8IFUysHkcvYdfcPv6AEQ6OApcrNueWmkVau6kIZY xes6h0iIoU4cNLvZ00ZD4O+IRsufw1SdxdJbJjg7E6yFbPj4HD2Igcff9D8iDNEUkdo3 wnycvVfQkWGilSlgSobzcRjy0obqGGu6z/kr1yMqZQd7p1MYgjoZcnzEg8dHDjnklOHz C03thYH/sGhTXgPDT5oSdwfMunP+ukjTT0xTnUgWVn9zGJuIS30YKqETOwHlGmjOMp9k zRtnbHPlZg2tzcg9WVF8/fnHpdxYd13xGNJVbRPPMOX+GSH+67ybadW6XyCFQQ6Aa6ti gm9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=vrSqwZKXMyaSyRVRtm4Hh+vS+LTe1orOUMFlnbJhADM=; b=O9+nbakkG82a56CdabecWoF4Qxa9VBw82jg7F1gV2MW7AwFV/Vo+7439zOg2VUQ0lS hEx0znfQ/4AjnCteF5FEkSvlN/FyVLGWnv34wcw4Oyg5OYwf/vvlHaepuzE6lTVINill uvVfSkLiUd+uD0welFwbW81Qh7D4i6yo9VjfuvMsgT2Cqx2XDqZx7aQMwp1mQ13XdVlo i+vsf+Z0ikapW8DPl30nFONWSMGFPpcHhZDKJtUuEfxPJcgXnOHO63fgrWNQBpNUABZQ GYTv3O9fFh36LZUP1YvY9iwE3J2cNfV8euB1UL/q6A5qLFYlydyyqd5KtGuDhPwYHfJT 7mtg== X-Gm-Message-State: AOAM5323PNXEXcVBC024EIZAdGUReAtlmivKnJc+TLFCbPCRSdTk4+t6 jB2TOTmXYgnwp0HXoqkS7hK8dhMQ+fk9vAGJ X-Google-Smtp-Source: ABdhPJxAzA6SZTTeebkG7Gc7VkjdZ5b0/65qge62qL0BNmo+GR3mhiDS20U8g88MXvj3fhosppwaGg== X-Received: by 2002:a9d:508:: with SMTP id 8mr19943863otw.338.1607954660242; Mon, 14 Dec 2020 06:04:20 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v4 37/43] accel/tcg: Add mips support to alloc_code_gen_buffer_splitwx_memfd Date: Mon, 14 Dec 2020 08:03:08 -0600 Message-Id: <20201214140314.18544-38-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201214140314.18544-1-richard.henderson@linaro.org> References: <20201214140314.18544-1-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::344; envelope-from=richard.henderson@linaro.org; helo=mail-ot1-x344.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: 2.1.23 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" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" Re-use the 256MiB region handling from alloc_code_gen_buffer_anon, and replace that with the shared file mapping. Signed-off-by: Richard Henderson --- accel/tcg/translate-all.c | 46 ++++++++++++++++++++++++++++++++------- 1 file changed, 38 insertions(+), 8 deletions(-) diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 17df6c94fa..b49aaf1026 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -1137,24 +1137,40 @@ static bool alloc_code_gen_buffer_anon(size_t size,= int prot, =20 static bool alloc_code_gen_buffer_splitwx_memfd(size_t size, Error **errp) { - void *buf_rw, *buf_rx; + void *buf_rw =3D NULL, *buf_rx =3D MAP_FAILED; int fd =3D -1; =20 +#ifdef __mips__ + /* Find space for the RX mapping, vs the 256MiB regions. */ + if (!alloc_code_gen_buffer_anon(size, PROT_NONE, + MAP_PRIVATE | MAP_ANONYMOUS | + MAP_NORESERVE, errp)) { + return false; + } + /* The size of the mapping may have been adjusted. */ + size =3D tcg_ctx->code_gen_buffer_size; + buf_rx =3D tcg_ctx->code_gen_buffer; +#endif + buf_rw =3D qemu_memfd_alloc("tcg-jit", size, 0, &fd, errp); if (buf_rw =3D=3D NULL) { - return false; + goto fail; } =20 +#ifdef __mips__ + void *tmp =3D mmap(buf_rx, size, PROT_READ | PROT_EXEC, + MAP_SHARED | MAP_FIXED, fd, 0); + if (tmp !=3D buf_rx) { + goto fail_rx; + } +#else buf_rx =3D mmap(NULL, size, PROT_READ | PROT_EXEC, MAP_SHARED, fd, 0); if (buf_rx =3D=3D MAP_FAILED) { - error_setg_errno(errp, errno, - "failed to map shared memory for execute"); - munmap(buf_rw, size); - close(fd); - return false; + goto fail_rx; } - close(fd); +#endif =20 + close(fd); tcg_ctx->code_gen_buffer =3D buf_rw; tcg_ctx->code_gen_buffer_size =3D size; tcg_splitwx_diff =3D buf_rx - buf_rw; @@ -1163,6 +1179,20 @@ static bool alloc_code_gen_buffer_splitwx_memfd(size= _t size, Error **errp) qemu_madvise(buf_rw, size, QEMU_MADV_HUGEPAGE); qemu_madvise(buf_rx, size, QEMU_MADV_HUGEPAGE); return true; + + fail_rx: + error_setg_errno(errp, errno, "failed to map shared memory for execute= "); + fail: + if (buf_rx !=3D MAP_FAILED) { + munmap(buf_rx, size); + } + if (buf_rw) { + munmap(buf_rw, size); + } + if (fd >=3D 0) { + close(fd); + } + return false; } #endif /* CONFIG_POSIX */ =20 --=20 2.25.1