From patchwork Sat Sep 18 18:45:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 12503993 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,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 29A91C433EF for ; Sat, 18 Sep 2021 19:09:28 +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 9966E610A6 for ; Sat, 18 Sep 2021 19:09:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 9966E610A6 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]:43036 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mRfiI-0005gs-Or for qemu-devel@archiver.kernel.org; Sat, 18 Sep 2021 15:09:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54332) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mRfLQ-00057t-Pn for qemu-devel@nongnu.org; Sat, 18 Sep 2021 14:45:53 -0400 Received: from mail-pg1-x52d.google.com ([2607:f8b0:4864:20::52d]:35500) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mRfLL-0006oE-C4 for qemu-devel@nongnu.org; Sat, 18 Sep 2021 14:45:48 -0400 Received: by mail-pg1-x52d.google.com with SMTP id e7so13099145pgk.2 for ; Sat, 18 Sep 2021 11:45:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=b88MeJ0VB21CqXeC9kfaVd7KTqjTS4pXJD2Bd6nXvIA=; b=LdR2CNYFfn+r1kbcWbDWOAIkh2kHJcp6BQGe+aDGcm5DVMhe5ygdAsn2O1vHbrQoIM 0YI+pGSVvdoFFwlrB1G40x2gWqEotTJtmGn9vi0YUdT1VjTOqsuNij3I5KUkDAdW972D u5ZpDcYyMegV9r81yi7lsvGibWUBaQTUrK6sHYuyaGhpSRqMVTxhv/jIYTL5IQO/0o6g uksGaSO1rP6BRuV5Pz3Jvkf+LN+HuR/AJNkNuNLnd4zMS4u4LvOhjRk86i5gKeSIv4Nm qfwvul+A26beSCR+JrYHyyxZ6x5IdaIbVZLa0GvxU5nbaqsz9Z2fRD/2qt/2rMbGMpZ5 /xgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=b88MeJ0VB21CqXeC9kfaVd7KTqjTS4pXJD2Bd6nXvIA=; b=tUZH7St2Cp+k9coV0JKHARyjPwfYtI4igDG6nfkusz1Z98fSpRq5UPzlJmHXzLadfy lyntbmMz6hlADEJmrcqDX85ds8b2Pf0kaBM7crUzLHl45jHfPhAz63bakhSPClCJv6Tf w0B9Xl/W6IY7WylIWNGi+ElVDYU9UNSAID5kGeR9CWpTNkqKUPgULFuDtsvZmAnkkhBX ML2DYZVYxWstHKHOyaXDEIqqTw1JuMTSZqtw2w4bO+Dyx330wqkYJCD7OOuLSeXe4bf1 ffGce28mmhE3Po5dLqiJpqkiIx/R8PwQHVtfdd9DmwpmWS1zFvQVfLCBMfcj051KLPGw xYpw== X-Gm-Message-State: AOAM531mXMvG2JEx39UCbUBwLLDHF7k0ehslPjP/3wqsU+Ns1X62utCs WwWJlT2TyNGoKnOr1N/mK2URUlLF/jb58Q== X-Google-Smtp-Source: ABdhPJwaW/pYoc+X7R60tK44q+NJKSrRNavPa6fD177dLQKHyVAbJIpMyUw8OoVxBw55n1iE+VGUlA== X-Received: by 2002:aa7:953d:0:b0:438:c168:df09 with SMTP id c29-20020aa7953d000000b00438c168df09mr16913236pfp.59.1631990741766; Sat, 18 Sep 2021 11:45:41 -0700 (PDT) Received: from localhost.localdomain ([71.212.134.125]) by smtp.gmail.com with ESMTPSA id y26sm9555858pfe.69.2021.09.18.11.45.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Sep 2021 11:45:41 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 15/41] linux-user/host/riscv: Populate host_signal.h Date: Sat, 18 Sep 2021 11:45:01 -0700 Message-Id: <20210918184527.408540-16-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210918184527.408540-1-richard.henderson@linaro.org> References: <20210918184527.408540-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::52d; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x52d.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: , Cc: laurent@vivier.eu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Split host_signal_pc and host_signal_write out of user-exec.c. Signed-off-by: Richard Henderson --- linux-user/host/riscv/host-signal.h | 85 +++++++++++++++++- accel/tcg/user-exec.c | 134 ---------------------------- 2 files changed, 84 insertions(+), 135 deletions(-) diff --git a/linux-user/host/riscv/host-signal.h b/linux-user/host/riscv/host-signal.h index f4b4d65031..5860dce7d7 100644 --- a/linux-user/host/riscv/host-signal.h +++ b/linux-user/host/riscv/host-signal.h @@ -1 +1,84 @@ -#define HOST_SIGNAL_PLACEHOLDER +/* + * host-signal.h: signal info dependent on the host architecture + * + * Copyright (C) 2021 Linaro Limited + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef RISCV_HOST_SIGNAL_H +#define RISCV_HOST_SIGNAL_H + +static inline uintptr_t host_signal_pc(ucontext_t *uc) +{ + return uc->uc_mcontext.__gregs[REG_PC]; +} + +static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) +{ + uint32_t insn = *(uint32_t *)host_signal_pc(uc); + + /* + * Detect store by reading the instruction at the program + * counter. Note: we currently only generate 32-bit + * instructions so we thus only detect 32-bit stores + */ + switch (((insn >> 0) & 0b11)) { + case 3: + switch (((insn >> 2) & 0b11111)) { + case 8: + switch (((insn >> 12) & 0b111)) { + case 0: /* sb */ + case 1: /* sh */ + case 2: /* sw */ + case 3: /* sd */ + case 4: /* sq */ + return true; + default: + break; + } + break; + case 9: + switch (((insn >> 12) & 0b111)) { + case 2: /* fsw */ + case 3: /* fsd */ + case 4: /* fsq */ + return true; + default: + break; + } + break; + default: + break; + } + } + + /* Check for compressed instructions */ + switch (((insn >> 13) & 0b111)) { + case 7: + switch (insn & 0b11) { + case 0: /*c.sd */ + case 2: /* c.sdsp */ + return true; + default: + break; + } + break; + case 6: + switch (insn & 0b11) { + case 0: /* c.sw */ + case 3: /* c.swsp */ + return true; + default: + break; + } + break; + default: + break; + } + + return false; +} + +#endif diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c index 42d1ad189b..01e7e69e7f 100644 --- a/accel/tcg/user-exec.c +++ b/accel/tcg/user-exec.c @@ -139,64 +139,6 @@ bool handle_sigsegv_accerr_write(CPUState *cpu, sigset_t *old_set, } } -/* - * 'pc' is the host PC at which the exception was raised. - * 'address' is the effective address of the memory exception. - * 'is_write' is 1 if a write caused the exception and otherwise 0. - * 'old_set' is the signal set which should be restored. - */ -static inline int handle_cpu_signal(uintptr_t pc, siginfo_t *info, - int is_write, sigset_t *old_set) -{ - CPUState *cpu = current_cpu; - CPUClass *cc; - unsigned long host_addr = (unsigned long)info->si_addr; - MMUAccessType access_type = adjust_signal_pc(&pc, is_write); - abi_ptr guest_addr; - - /* For synchronous signals we expect to be coming from the vCPU - * thread (so current_cpu should be valid) and either from running - * code or during translation which can fault as we cross pages. - * - * If neither is true then something has gone wrong and we should - * abort rather than try and restart the vCPU execution. - */ - if (!cpu || !cpu->running) { - printf("qemu:%s received signal outside vCPU context @ pc=0x%" - PRIxPTR "\n", __func__, pc); - abort(); - } - -#if defined(DEBUG_SIGNAL) - printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n", - pc, host_addr, is_write, *(unsigned long *)old_set); -#endif - - /* Convert forcefully to guest address space, invalid addresses - are still valid segv ones */ - guest_addr = h2g_nocheck(host_addr); - - /* XXX: locking issue */ - if (is_write && - info->si_signo == SIGSEGV && - info->si_code == SEGV_ACCERR && - h2g_valid(host_addr) && - handle_sigsegv_accerr_write(cpu, old_set, pc, guest_addr)) { - return 1; - } - - /* - * There is no way the target can handle this other than raising - * an exception. Undo signal and retaddr state prior to longjmp. - */ - sigprocmask(SIG_SETMASK, old_set, NULL); - - cc = CPU_GET_CLASS(cpu); - cc->tcg_ops->tlb_fill(cpu, guest_addr, 0, access_type, - MMU_USER_IDX, false, pc); - g_assert_not_reached(); -} - static int probe_access_internal(CPUArchState *env, target_ulong addr, int fault_size, MMUAccessType access_type, bool nonfault, uintptr_t ra) @@ -255,82 +197,6 @@ void *probe_access(CPUArchState *env, target_ulong addr, int size, return size ? g2h(env_cpu(env), addr) : NULL; } -#if defined(__riscv) - -int cpu_signal_handler(int host_signum, void *pinfo, - void *puc) -{ - siginfo_t *info = pinfo; - ucontext_t *uc = puc; - greg_t pc = uc->uc_mcontext.__gregs[REG_PC]; - uint32_t insn = *(uint32_t *)pc; - int is_write = 0; - - /* Detect store by reading the instruction at the program - counter. Note: we currently only generate 32-bit - instructions so we thus only detect 32-bit stores */ - switch (((insn >> 0) & 0b11)) { - case 3: - switch (((insn >> 2) & 0b11111)) { - case 8: - switch (((insn >> 12) & 0b111)) { - case 0: /* sb */ - case 1: /* sh */ - case 2: /* sw */ - case 3: /* sd */ - case 4: /* sq */ - is_write = 1; - break; - default: - break; - } - break; - case 9: - switch (((insn >> 12) & 0b111)) { - case 2: /* fsw */ - case 3: /* fsd */ - case 4: /* fsq */ - is_write = 1; - break; - default: - break; - } - break; - default: - break; - } - } - - /* Check for compressed instructions */ - switch (((insn >> 13) & 0b111)) { - case 7: - switch (insn & 0b11) { - case 0: /*c.sd */ - case 2: /* c.sdsp */ - is_write = 1; - break; - default: - break; - } - break; - case 6: - switch (insn & 0b11) { - case 0: /* c.sw */ - case 3: /* c.swsp */ - is_write = 1; - break; - default: - break; - } - break; - default: - break; - } - - return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); -} -#endif - /* The softmmu versions of these helpers are in cputlb.c. */ uint32_t cpu_ldub_data(CPUArchState *env, abi_ptr ptr)