From nobody Tue Feb 10 19:17:41 2026 Delivered-To: importer@patchew.org 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; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1583909414; cv=none; d=zohomail.com; s=zohoarc; b=OHivyLdgxBdBvjDm0irTSnmT6PxKpa02xydwNtUQKxLmqfBhN95BhEvB9bq2DG/ltKadz03ur6ZLS6CHj9LHdFKW3tDp7Chs0ELdoiGilfRBuAvNIYMGzpL2xhXKmhHAbwg/5MnacWqn/2Ua9LQI9m8cWxemRyJgumQshjvurq4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1583909414; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=Tz6r3+bMnyO04HqqXq5aHLFFiU4Amy53tPfIpPhOcd0=; b=P/ab0kYxkPZwZOfZv9UuUXCK2rKB6vuEq57pcHR0UqQtNQsl9fmbDWeDyPJYhktKyguBnW85MgFyzWRj/Najo48ugsG9VCV3qj7XU7PLMNHpAsfYJpl1VCYskD/VUnCKtbpLXlj2ET64kSa92I0I4mURqVJjvhb+949r13X9gqo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1583909414709332.9684001325155; Tue, 10 Mar 2020 23:50:14 -0700 (PDT) Received: from localhost ([::1]:46532 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jBvC1-0006DG-L4 for importer@patchew.org; Wed, 11 Mar 2020 02:50:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59508) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jBv6b-0006F9-MV for qemu-devel@nongnu.org; Wed, 11 Mar 2020 02:44:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jBv6Z-0001xe-Q9 for qemu-devel@nongnu.org; Wed, 11 Mar 2020 02:44:37 -0400 Received: from mail-pl1-x643.google.com ([2607:f8b0:4864:20::643]:42707) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jBv6Z-0001vs-Jf for qemu-devel@nongnu.org; Wed, 11 Mar 2020 02:44:35 -0400 Received: by mail-pl1-x643.google.com with SMTP id t3so613231plz.9 for ; Tue, 10 Mar 2020 23:44:34 -0700 (PDT) Received: from localhost.localdomain (97-126-123-70.tukw.qwest.net. [97.126.123.70]) by smtp.gmail.com with ESMTPSA id z3sm50137807pfz.155.2020.03.10.23.44.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2020 23:44:32 -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=Tz6r3+bMnyO04HqqXq5aHLFFiU4Amy53tPfIpPhOcd0=; b=iY6j3nvVY5+1mQagFTmecA511o9b0ILObTCimvRrrl3YbKGbCuEWO9y0TAksf9STzJ Jhc005Jx+vL3VyAm9GUq08M8WxBGQX/pMAqbJeCLUlLFY5KNytNBFNqfyRehExCwvYgC 4PTaZs7w8Rxs/yonODh+eY3QRjdVBmaXaoocQgugj5bpyRKiANwoG6paPfVmEiFJbKeb mLtYEg0SLg2Kl8EL+Gz19pF1lAmdFLA/6pGW0MouAdPS0yXuyYClmLQa2Mjyl0/cgEah IML880+wuN3TmdARqkKLmKC7gbbYJvOdXuNNnUN9mRfWxOpd6sYXDcW67uqkXonBAJWQ CFgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Tz6r3+bMnyO04HqqXq5aHLFFiU4Amy53tPfIpPhOcd0=; b=SvRecTS1Jm9+h/iSS2baDfsrki1W4DKIFMu+jDnXuP9aK+pNh9x9C1o2lgV7/Vr05c xotaku8K4rccIDgDJLWxVe+IFZq49Q2nqzsJGJRqv6j8iL+g7c+90Bm7sW4cgVjtuknv ehwD5oRZozGjG1MTPLBzCNM6oIyJ/GkBDHzwlY65PnnmhWD3KB3FsqCrPw7QG66jqIL6 iDXgkRuaSnZTwo6XtlLx5bqNgaGTlsIn/AFjnbq/ofwSINpE2p1RuxlXh4kCkVtl5vAO 8dfOE9OMcVr8GZjh1zabVx4uCy4qq/K7TZ+yI+dXgOJnPTaMwURBPkZSMF+480BmM3jf /OBw== X-Gm-Message-State: ANhLgQ2J/hf2cOnonC17a0Aw8YtGbHta0gv1rWSMdUynZKRxxFck4NI2 Hd852ffcYNYH2CQLb8ivbVau6f2+J/Q= X-Google-Smtp-Source: ADFU+vtbUuD/CUGb6wvvwD6jmbSIU78VhoSeyfEvrrkp/Qh/tGMvJCPfyW/FpF0PFwHpvpEWfjA0zg== X-Received: by 2002:a17:90b:3653:: with SMTP id nh19mr1896194pjb.41.1583909073613; Tue, 10 Mar 2020 23:44:33 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 09/16] target/arm: Handle watchpoints in sve_ld1_r Date: Tue, 10 Mar 2020 23:44:13 -0700 Message-Id: <20200311064420.30606-10-richard.henderson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200311064420.30606-1-richard.henderson@linaro.org> References: <20200311064420.30606-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::643 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: peter.maydell@linaro.org, qemu-arm@nongnu.org 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" Handle all of the watchpoints for active elements all at once, before we've modified the vector register. This removes the TLB_WATCHPOINT bit from page[].flags, which means that we can use the normal fast path via RAM. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/sve_helper.c | 70 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 69 insertions(+), 1 deletion(-) diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c index b827900a4e..2c0e838ed3 100644 --- a/target/arm/sve_helper.c +++ b/target/arm/sve_helper.c @@ -4377,6 +4377,68 @@ static bool sve_cont_ldst_pages(SVEContLdSt *info, S= VEContFault fault, return have_work; } =20 +static void sve_cont_ldst_watchpoints(SVEContLdSt *info, CPUARMState *env, + uint64_t *vg, target_ulong addr, + int esize, int msize, int wp_access, + uintptr_t retaddr) +{ +#ifndef CONFIG_USER_ONLY + intptr_t mem_off, reg_off, reg_last; + int flags0 =3D info->page[0].flags; + int flags1 =3D info->page[1].flags; + + if (likely(!((flags0 | flags1) & TLB_WATCHPOINT))) { + return; + } + + /* Indicate that watchpoints are handled. */ + info->page[0].flags =3D flags0 & ~TLB_WATCHPOINT; + info->page[1].flags =3D flags1 & ~TLB_WATCHPOINT; + + if (flags0 & TLB_WATCHPOINT) { + mem_off =3D info->mem_off_first[0]; + reg_off =3D info->reg_off_first[0]; + reg_last =3D info->reg_off_last[0]; + + while (reg_off <=3D reg_last) { + uint64_t pg =3D vg[reg_off >> 6]; + do { + if ((pg >> (reg_off & 63)) & 1) { + cpu_check_watchpoint(env_cpu(env), addr + mem_off, msi= ze, + info->page[0].attrs, wp_access, r= etaddr); + } + reg_off +=3D esize; + mem_off +=3D msize; + } while (reg_off <=3D reg_last && (reg_off & 63)); + } + } + + mem_off =3D info->mem_off_split; + if (mem_off >=3D 0) { + cpu_check_watchpoint(env_cpu(env), addr + mem_off, msize, + info->page[0].attrs, wp_access, retaddr); + } + + mem_off =3D info->mem_off_first[1]; + if ((flags1 & TLB_WATCHPOINT) && mem_off >=3D 0) { + reg_off =3D info->reg_off_first[1]; + reg_last =3D info->reg_off_last[1]; + + do { + uint64_t pg =3D vg[reg_off >> 6]; + do { + if ((pg >> (reg_off & 63)) & 1) { + cpu_check_watchpoint(env_cpu(env), addr + mem_off, msi= ze, + info->page[1].attrs, wp_access, r= etaddr); + } + reg_off +=3D esize; + mem_off +=3D msize; + } while (reg_off & 63); + } while (reg_off <=3D reg_last); + } +#endif +} + /* * The result of tlb_vaddr_to_host for user-only is just g2h(x), * which is always non-null. Elide the useless test. @@ -4418,13 +4480,19 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, cons= t target_ulong addr, /* Probe the page(s). Exit with exception for any invalid page. */ sve_cont_ldst_pages(&info, FAULT_ALL, env, addr, MMU_DATA_LOAD, retadd= r); =20 + /* Handle watchpoints for all active elements. */ + sve_cont_ldst_watchpoints(&info, env, vg, addr, 1 << esz, 1 << msz, + BP_MEM_READ, retaddr); + + /* TODO: MTE check. */ + flags =3D info.page[0].flags | info.page[1].flags; if (unlikely(flags !=3D 0)) { #ifdef CONFIG_USER_ONLY g_assert_not_reached(); #else /* - * At least one page includes MMIO (or watchpoints). + * At least one page includes MMIO. * Any bus operation can fail with cpu_transaction_failed, * which for ARM will raise SyncExternal. Perform the load * into scratch memory to preserve register state until the end. --=20 2.20.1