From patchwork Thu Feb 4 16:39:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Claudio Fontana X-Patchwork-Id: 1436142 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=) 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 4DWlLM6c6Zz9sXV for ; Fri, 5 Feb 2021 04:05:47 +1100 (AEDT) Received: from localhost ([::1]:40998 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l7i4f-0004hg-Rt for incoming@patchwork.ozlabs.org; Thu, 04 Feb 2021 12:05:45 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40652) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l7hfw-0000Vk-BO for qemu-devel@nongnu.org; Thu, 04 Feb 2021 11:40:12 -0500 Received: from mx2.suse.de ([195.135.220.15]:53762) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l7hfs-0004Vh-HQ for qemu-devel@nongnu.org; Thu, 04 Feb 2021 11:40:12 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 9980EAED2; Thu, 4 Feb 2021 16:39:51 +0000 (UTC) From: Claudio Fontana To: =?utf-8?q?Alex_Benn=C3=A9e?= , Paolo Bonzini , Richard Henderson , =?utf-8?q?Philippe_Mathie?= =?utf-8?q?u-Daud=C3=A9?= , Eduardo Habkost , Peter Maydell Subject: [PATCH v16 12/23] physmem: make watchpoint checking code TCG-only Date: Thu, 4 Feb 2021 17:39:20 +0100 Message-Id: <20210204163931.7358-13-cfontana@suse.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210204163931.7358-1-cfontana@suse.de> References: <20210204163931.7358-1-cfontana@suse.de> MIME-Version: 1.0 Received-SPF: pass client-ip=195.135.220.15; envelope-from=cfontana@suse.de; helo=mx2.suse.de X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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 , Thomas Huth , qemu-devel@nongnu.org, Roman Bolshakov , Alistair Francis , Claudio Fontana Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" cpu_check_watchpoint, watchpoint_address_matches are TCG-only. Signed-off-by: Claudio Fontana Reviewed-by: Alex Bennée --- softmmu/physmem.c | 141 +++++++++++++++++++++++----------------------- 1 file changed, 72 insertions(+), 69 deletions(-) diff --git a/softmmu/physmem.c b/softmmu/physmem.c index 60760a3bdc..51ed600bf9 100644 --- a/softmmu/physmem.c +++ b/softmmu/physmem.c @@ -840,6 +840,7 @@ void cpu_watchpoint_remove_all(CPUState *cpu, int mask) } } +#ifdef CONFIG_TCG /* Return true if this watchpoint address matches the specified * access (ie the address range covered by the watchpoint overlaps * partially or completely with the address range covered by the @@ -873,6 +874,77 @@ int cpu_watchpoint_address_matches(CPUState *cpu, vaddr addr, vaddr len) return ret; } +/* Generate a debug exception if a watchpoint has been hit. */ +void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len, + MemTxAttrs attrs, int flags, uintptr_t ra) +{ + CPUClass *cc = CPU_GET_CLASS(cpu); + CPUWatchpoint *wp; + + assert(tcg_enabled()); + if (cpu->watchpoint_hit) { + /* + * We re-entered the check after replacing the TB. + * Now raise the debug interrupt so that it will + * trigger after the current instruction. + */ + qemu_mutex_lock_iothread(); + cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG); + qemu_mutex_unlock_iothread(); + return; + } + + addr = cc->adjust_watchpoint_address(cpu, addr, len); + QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { + if (watchpoint_address_matches(wp, addr, len) + && (wp->flags & flags)) { + if (replay_running_debug()) { + /* + * Don't process the watchpoints when we are + * in a reverse debugging operation. + */ + replay_breakpoint(); + return; + } + if (flags == BP_MEM_READ) { + wp->flags |= BP_WATCHPOINT_HIT_READ; + } else { + wp->flags |= BP_WATCHPOINT_HIT_WRITE; + } + wp->hitaddr = MAX(addr, wp->vaddr); + wp->hitattrs = attrs; + if (!cpu->watchpoint_hit) { + if (wp->flags & BP_CPU && + !cc->debug_check_watchpoint(cpu, wp)) { + wp->flags &= ~BP_WATCHPOINT_HIT; + continue; + } + cpu->watchpoint_hit = wp; + + mmap_lock(); + tb_check_watchpoint(cpu, ra); + if (wp->flags & BP_STOP_BEFORE_ACCESS) { + cpu->exception_index = EXCP_DEBUG; + mmap_unlock(); + cpu_loop_exit_restore(cpu, ra); + } else { + /* Force execution of one insn next time. */ + cpu->cflags_next_tb = 1 | curr_cflags(); + mmap_unlock(); + if (ra) { + cpu_restore_state(cpu, ra, true); + } + cpu_loop_exit_noexc(cpu); + } + } + } else { + wp->flags &= ~BP_WATCHPOINT_HIT; + } + } +} + +#endif /* CONFIG_TCG */ + /* Called from RCU critical section */ static RAMBlock *qemu_get_ram_block(ram_addr_t addr) { @@ -2359,75 +2431,6 @@ ram_addr_t qemu_ram_addr_from_host(void *ptr) return block->offset + offset; } -/* Generate a debug exception if a watchpoint has been hit. */ -void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len, - MemTxAttrs attrs, int flags, uintptr_t ra) -{ - CPUClass *cc = CPU_GET_CLASS(cpu); - CPUWatchpoint *wp; - - assert(tcg_enabled()); - if (cpu->watchpoint_hit) { - /* - * We re-entered the check after replacing the TB. - * Now raise the debug interrupt so that it will - * trigger after the current instruction. - */ - qemu_mutex_lock_iothread(); - cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG); - qemu_mutex_unlock_iothread(); - return; - } - - addr = cc->adjust_watchpoint_address(cpu, addr, len); - QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { - if (watchpoint_address_matches(wp, addr, len) - && (wp->flags & flags)) { - if (replay_running_debug()) { - /* - * Don't process the watchpoints when we are - * in a reverse debugging operation. - */ - replay_breakpoint(); - return; - } - if (flags == BP_MEM_READ) { - wp->flags |= BP_WATCHPOINT_HIT_READ; - } else { - wp->flags |= BP_WATCHPOINT_HIT_WRITE; - } - wp->hitaddr = MAX(addr, wp->vaddr); - wp->hitattrs = attrs; - if (!cpu->watchpoint_hit) { - if (wp->flags & BP_CPU && - !cc->debug_check_watchpoint(cpu, wp)) { - wp->flags &= ~BP_WATCHPOINT_HIT; - continue; - } - cpu->watchpoint_hit = wp; - - mmap_lock(); - tb_check_watchpoint(cpu, ra); - if (wp->flags & BP_STOP_BEFORE_ACCESS) { - cpu->exception_index = EXCP_DEBUG; - mmap_unlock(); - cpu_loop_exit_restore(cpu, ra); - } else { - /* Force execution of one insn next time. */ - cpu->cflags_next_tb = 1 | curr_cflags(); - mmap_unlock(); - if (ra) { - cpu_restore_state(cpu, ra, true); - } - cpu_loop_exit_noexc(cpu); - } - } - } else { - wp->flags &= ~BP_WATCHPOINT_HIT; - } - } -} - static MemTxResult flatview_read(FlatView *fv, hwaddr addr, MemTxAttrs attrs, void *buf, hwaddr len); static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs,