From patchwork Sun Jan 3 14:50:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Bolshakov X-Patchwork-Id: 1421887 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=yadro.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.a=rsa-sha256 header.s=mta-01 header.b=TX8H/As6; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4D81xw6Qpcz9sVb for ; Mon, 4 Jan 2021 01:54:43 +1100 (AEDT) Received: from localhost ([::1]:44618 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kw4mH-0007KC-CB for incoming@patchwork.ozlabs.org; Sun, 03 Jan 2021 09:54:41 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51084) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kw4ls-0007K2-TY for qemu-devel@nongnu.org; Sun, 03 Jan 2021 09:54:16 -0500 Received: from mta-02.yadro.com ([89.207.88.252]:57260 helo=mta-01.yadro.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kw4ln-0004uY-QG for qemu-devel@nongnu.org; Sun, 03 Jan 2021 09:54:16 -0500 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 80CB741240; Sun, 3 Jan 2021 14:54:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :x-mailer:message-id:date:date:subject:subject:from:from :received:received:received; s=mta-01; t=1609685647; x= 1611500048; bh=goglvU3wAYS636QZNM256ol3Lc+OQaKrsO0w2L9B6X8=; b=T X8H/As6VTBe+zepXNNQBf2K6j+yXn6rgz0eMbhgUJ7Il5llJYcSk8ge5z4Nar1Gw zv0wjPN5nEYvT3IjMWSAhYtU4HTeBQVR5ZpHvnuHZKLJPB7X7v0nmtS3vNJHH9vN +rLZTVI8I0nvB2IeojZjILPOe9VGjnPT9jY2YVdbOQ= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LLnwp3nSDw0Y; Sun, 3 Jan 2021 17:54:07 +0300 (MSK) Received: from T-EXCH-03.corp.yadro.com (t-exch-03.corp.yadro.com [172.17.100.103]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id B0DB34126D; Sun, 3 Jan 2021 17:54:06 +0300 (MSK) Received: from localhost (172.17.204.212) by T-EXCH-03.corp.yadro.com (172.17.100.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Sun, 3 Jan 2021 17:54:06 +0300 From: Roman Bolshakov To: Subject: [PATCH v2] tcg: Fix execution on Apple Silicon Date: Sun, 3 Jan 2021 17:50:57 +0300 Message-ID: <20210103145055.11074-1-r.bolshakov@yadro.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-Originating-IP: [172.17.204.212] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-03.corp.yadro.com (172.17.100.103) Received-SPF: pass client-ip=89.207.88.252; envelope-from=r.bolshakov@yadro.com; helo=mta-01.yadro.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, 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: , Cc: Richard Henderson , Roman Bolshakov , Alexander Graf , Joelle van Dyne , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Pages can't be both write and executable at the same time on Apple Silicon. macOS provides public API to switch write protection [1] for JIT applications, like TCG. 1. https://developer.apple.com/documentation/apple_silicon/porting_just-in-time_compilers_to_apple_silicon Signed-off-by: Roman Bolshakov Tested-by: Joelle van Dyne --- v1: https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg00073.html Changes since v1: - Pruned not needed fiddling with W^X and dropped symmetry from write lock/unlock and renamed related functions. Similar approach is used in JavaScriptCore [1]. - Moved jit helper functions to util/osdep As outlined in osdep.h, this matches to (2): * In an ideal world this header would contain only: * (1) things which everybody needs * (2) things without which code would work on most platforms but * fail to compile or misbehave on a minority of host OSes - Fixed a checkpatch error - Limit new behaviour only to macOS 11.0 and above, because of the following declarations: __API_AVAILABLE(macos(11.0)) __API_UNAVAILABLE(ios, tvos, watchos) void pthread_jit_write_protect_np(int enabled); __API_AVAILABLE(macos(11.0)) __API_UNAVAILABLE(ios, tvos, watchos) int pthread_jit_write_protect_supported_np(void); 1. https://bugs.webkit.org/attachment.cgi?id=402515&action=prettypatch accel/tcg/cpu-exec.c | 2 ++ accel/tcg/translate-all.c | 6 ++++++ include/qemu/osdep.h | 3 +++ tcg/tcg.c | 1 + util/osdep.c | 22 ++++++++++++++++++++++ 5 files changed, 34 insertions(+) diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index 8689c54499..374060eb45 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -175,6 +175,7 @@ static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, TranslationBlock *itb) } #endif /* DEBUG_DISAS */ + qemu_thread_jit_execute(); ret = tcg_qemu_tb_exec(env, tb_ptr); cpu->can_do_io = 1; last_tb = (TranslationBlock *)(ret & ~TB_EXIT_MASK); @@ -382,6 +383,7 @@ static inline void tb_add_jump(TranslationBlock *tb, int n, { uintptr_t old; + qemu_thread_jit_write(); assert(n < ARRAY_SIZE(tb->jmp_list_next)); qemu_spin_lock(&tb_next->jmp_lock); diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index b7d50a73d4..88ae5d35ef 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -1072,6 +1072,9 @@ static inline void *alloc_code_gen_buffer(void) size_t size = tcg_ctx->code_gen_buffer_size; void *buf; +#if defined(__APPLE__) && defined(MAC_OS_VERSION_11_0) + flags |= MAP_JIT; +#endif buf = mmap(NULL, size, prot, flags, -1, 0); if (buf == MAP_FAILED) { return NULL; @@ -1485,7 +1488,9 @@ static void do_tb_phys_invalidate(TranslationBlock *tb, bool rm_from_page_list) static void tb_phys_invalidate__locked(TranslationBlock *tb) { + qemu_thread_jit_write(); do_tb_phys_invalidate(tb, true); + qemu_thread_jit_execute(); } /* invalidate one TB @@ -1687,6 +1692,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, #endif assert_memory_lock(); + qemu_thread_jit_write(); phys_pc = get_page_addr_code(env, pc); diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index f9ec8c84e9..89abebcf5d 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -686,4 +686,7 @@ char *qemu_get_host_name(Error **errp); */ size_t qemu_get_host_physmem(void); +void qemu_thread_jit_write(void); +void qemu_thread_jit_execute(void); + #endif diff --git a/tcg/tcg.c b/tcg/tcg.c index 43c6cf8f52..ab8488f5d5 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -1065,6 +1065,7 @@ void tcg_prologue_init(TCGContext *s) s->pool_labels = NULL; #endif + qemu_thread_jit_write(); /* Generate the prologue. */ tcg_target_qemu_prologue(s); diff --git a/util/osdep.c b/util/osdep.c index 66d01b9160..80ec7185da 100644 --- a/util/osdep.c +++ b/util/osdep.c @@ -606,3 +606,25 @@ writev(int fd, const struct iovec *iov, int iov_cnt) return readv_writev(fd, iov, iov_cnt, true); } #endif + +#if defined(__APPLE__) && defined(MAC_OS_VERSION_11_0) +static inline void qemu_thread_jit_write_protect(bool enabled) +{ + if (pthread_jit_write_protect_supported_np()) { + pthread_jit_write_protect_np(enabled); + } +} + +void qemu_thread_jit_execute(void) +{ + qemu_thread_jit_write_protect(true); +} + +void qemu_thread_jit_write(void) +{ + qemu_thread_jit_write_protect(false); +} +#else +void qemu_thread_jit_write(void) {} +void qemu_thread_jit_execute(void) {} +#endif