From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E37ACC4338F for ; Wed, 18 Aug 2021 20:37:28 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5585C610FA for ; Wed, 18 Aug 2021 20:37:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 5585C610FA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:59878 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mGSJT-0008Hq-I1 for qemu-devel@archiver.kernel.org; Wed, 18 Aug 2021 16:37:27 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40320) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mGS2N-00088T-CV for qemu-devel@nongnu.org; Wed, 18 Aug 2021 16:19:47 -0400 Received: from mail-pf1-x436.google.com ([2607:f8b0:4864:20::436]:38466) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mGS2K-0006Eg-AE for qemu-devel@nongnu.org; Wed, 18 Aug 2021 16:19:47 -0400 Received: by mail-pf1-x436.google.com with SMTP id a21so3338394pfh.5 for ; Wed, 18 Aug 2021 13:19:43 -0700 (PDT) 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=dLKp0mDnjjRjPauDQA0yKsYIxkun+14IJ8e0NroxfP0=; b=GjB/NbVw8c/qldv19W4yn+SplSDazvAR4v+6xK6LORpPnHxueKRFeb4MYOfCrUQAlt ftIfq60avd7E3zDS19MIKBE1WK0G9OVrzWGz9ShkKh9bwOIFqnRqZzubipDSqPRTd5kH u/ETyGYNafabrcbxqnOiE4fxri7VnlZChK9mI9VVR2Bb8qKn7QtLT5iG6By6yUtSx2hl RJssyFuiV5BJfP4P0xaf4BSjd5HGKSGozu9P5S486sf8oDWyhRZVMUN2sAgBbqPKxbrU B1QFKYiEoZuo1AYiPT1Xg+uESjQFQ4FryjSASwYwj3eqoNMBtH0k9VYpnnwdyJ5+whZL BK7Q== 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=dLKp0mDnjjRjPauDQA0yKsYIxkun+14IJ8e0NroxfP0=; b=h7+osDcfeT89N7aGujNdwl37MFBGWA+t0Uq83QbKdDuXE0YA0pBPKah6ljO5OJhzMj wcluKczbDD07/a33lboOJFMp97Zir6P74KCEwTJrjUutocP6ygDMbkb99MwNs4N4exBZ kooiljQMSda6kafD95YxOVUj9Lfsg/XGlFKwHQcmQM7QyX7pHvrJ6tbS1gxbIClfMP/4 33iP6KUiZtOaRrrDxykqQASIr4fsTmvnEQKqTuWp8WX76lNSrHvJ8BFDwJGcECAZW/+v NAqQYvnvf547OO/bRguTi9WYlXYPcCdm4zAqwekeez7yIQci5MBZlQn6V0GT3Jrwoctn VmRg== X-Gm-Message-State: AOAM532GldZmr+Lr/9I6JDtkxkjQoanDKIaiCIAZDxz1mjhCCXZ+fxXs uqXXIG4bMXeJ71IPfBdeieM9GMDG1CrAxQ== X-Google-Smtp-Source: ABdhPJzBIZdcYlRlmaXu33vv/LYxJSiiHIiuhBWh0FcDCQl88m5rqZWo2uUuQmn4kKJRBJXjf8oT+w== X-Received: by 2002:a63:fd54:: with SMTP id m20mr10564431pgj.104.1629317983053; Wed, 18 Aug 2021 13:19:43 -0700 (PDT) Received: from localhost.localdomain ([173.197.107.15]) by smtp.gmail.com with ESMTPSA id x13sm619621pjh.30.2021.08.18.13.19.42 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Aug 2021 13:19:42 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 09/16] tcg/mips: Drop special alignment for code_gen_buffer Date: Wed, 18 Aug 2021 10:19:24 -1000 Message-Id: <20210818201931.393394-10-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210818201931.393394-1-richard.henderson@linaro.org> References: <20210818201931.393394-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::436; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x436.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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Richard Henderson --- tcg/region.c | 91 ---------------------------------------------------- 1 file changed, 91 deletions(-) diff --git a/tcg/region.c b/tcg/region.c index e64c3ea230..9cc30d4922 100644 --- a/tcg/region.c +++ b/tcg/region.c @@ -467,38 +467,6 @@ static size_t tcg_n_regions(size_t tb_size, unsigned max_cpus) (DEFAULT_CODE_GEN_BUFFER_SIZE_1 < MAX_CODE_GEN_BUFFER_SIZE \ ? DEFAULT_CODE_GEN_BUFFER_SIZE_1 : MAX_CODE_GEN_BUFFER_SIZE) -#ifdef __mips__ -/* - * In order to use J and JAL within the code_gen_buffer, we require - * that the buffer not cross a 256MB boundary. - */ -static inline bool cross_256mb(void *addr, size_t size) -{ - return ((uintptr_t)addr ^ ((uintptr_t)addr + size)) & ~0x0ffffffful; -} - -/* - * We weren't able to allocate a buffer without crossing that boundary, - * so make do with the larger portion of the buffer that doesn't cross. - * Returns the new base and size of the buffer in *obuf and *osize. - */ -static inline void split_cross_256mb(void **obuf, size_t *osize, - void *buf1, size_t size1) -{ - void *buf2 = (void *)(((uintptr_t)buf1 + size1) & ~0x0ffffffful); - size_t size2 = buf1 + size1 - buf2; - - size1 = buf2 - buf1; - if (size1 < size2) { - size1 = size2; - buf1 = buf2; - } - - *obuf = buf1; - *osize = size1; -} -#endif - #ifdef USE_STATIC_CODE_GEN_BUFFER static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE] __attribute__((aligned(CODE_GEN_ALIGN))); @@ -526,12 +494,6 @@ static int alloc_code_gen_buffer(size_t tb_size, int splitwx, Error **errp) size = QEMU_ALIGN_DOWN(tb_size, qemu_real_host_page_size); } -#ifdef __mips__ - if (cross_256mb(buf, size)) { - split_cross_256mb(&buf, &size, buf, size); - } -#endif - region.start_aligned = buf; region.total_size = size; @@ -573,39 +535,6 @@ static int alloc_code_gen_buffer_anon(size_t size, int prot, return -1; } -#ifdef __mips__ - if (cross_256mb(buf, size)) { - /* - * Try again, with the original still mapped, to avoid re-acquiring - * the same 256mb crossing. - */ - size_t size2; - void *buf2 = mmap(NULL, size, prot, flags, -1, 0); - switch ((int)(buf2 != MAP_FAILED)) { - case 1: - if (!cross_256mb(buf2, size)) { - /* Success! Use the new buffer. */ - munmap(buf, size); - break; - } - /* Failure. Work with what we had. */ - munmap(buf2, size); - /* fallthru */ - default: - /* Split the original buffer. Free the smaller half. */ - split_cross_256mb(&buf2, &size2, buf, size); - if (buf == buf2) { - munmap(buf + size2, size - size2); - } else { - munmap(buf, size - size2); - } - size = size2; - break; - } - buf = buf2; - } -#endif - region.start_aligned = buf; region.total_size = size; return prot; @@ -620,35 +549,15 @@ static bool alloc_code_gen_buffer_splitwx_memfd(size_t size, Error **errp) void *buf_rw = NULL, *buf_rx = MAP_FAILED; int fd = -1; -#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) < 0) { - return false; - } - /* The size of the mapping may have been adjusted. */ - buf_rx = region.start_aligned; - size = region.total_size; -#endif - buf_rw = qemu_memfd_alloc("tcg-jit", size, 0, &fd, errp); if (buf_rw == NULL) { goto fail; } -#ifdef __mips__ - void *tmp = mmap(buf_rx, size, PROT_READ | PROT_EXEC, - MAP_SHARED | MAP_FIXED, fd, 0); - if (tmp != buf_rx) { - goto fail_rx; - } -#else buf_rx = mmap(NULL, size, PROT_READ | PROT_EXEC, MAP_SHARED, fd, 0); if (buf_rx == MAP_FAILED) { goto fail_rx; } -#endif close(fd); region.start_aligned = buf_rw; -- 2.25.1