From patchwork Wed Mar 10 04:10:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 12126937 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 4D671C433DB for ; Wed, 10 Mar 2021 04:22:57 +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 D7A8164FE3 for ; Wed, 10 Mar 2021 04:22:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D7A8164FE3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:51730 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lJqN6-0006TG-0S for qemu-devel@archiver.kernel.org; Tue, 09 Mar 2021 23:22:56 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:48368) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lJqBL-0004Jm-9e; Tue, 09 Mar 2021 23:10:47 -0500 Received: from bilbo.ozlabs.org ([203.11.71.1]:60833 helo=ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lJqBH-0004FT-N7; Tue, 09 Mar 2021 23:10:46 -0500 Received: by ozlabs.org (Postfix, from userid 1007) id 4DwJWf2QfLz9sf9; Wed, 10 Mar 2021 15:10:06 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1615349406; bh=RDDaoxGlqZ067yRviJA7gZVjML6Hf1+QMpsvVlDJQto=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VFruNws5cnc9GidZp4B8EsTjLOmUovgYF8gktlEqJs/s32fgC2ND1MQHNiE2aBCXS 8aBUQab91vnDp28CEGrJiP6+9B+ZBcZXf1OVzMJsfSMSOl69MWuUp7wym/4AKPIxDG h/4xf8mERAs8siBQ4LhwWtJ9uqjPb84IEZVY1o0o= From: David Gibson To: peter.maydell@linaro.org, groug@kaod.org Subject: [PULL 18/20] target/ppc: fix icount support on Book-e vms accessing SPRs Date: Wed, 10 Mar 2021 15:10:00 +1100 Message-Id: <20210310041002.333813-19-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210310041002.333813-1-david@gibson.dropbear.id.au> References: <20210310041002.333813-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Received-SPF: pass client-ip=203.11.71.1; envelope-from=dgibson@ozlabs.org; helo=ozlabs.org X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no 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: Paolo Bonzini , Vitaly Cheptsov , qemu-ppc@nongnu.org, qemu-devel@nongnu.org, David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Vitaly Cheptsov Failing to guard SPR access with gen_io_start/gen_stop_exception causes "Bad icount read" exceptions when running VMs with e500mc and e500v2 CPUs with an icount parameter. Cc: David Gibson Cc: Greg Kurz Cc: Paolo Bonzini Signed-off-by: Vitaly Cheptsov Message-Id: <20210303140851.78383-1-cheptsov@ispras.ru> Signed-off-by: David Gibson --- target/ppc/translate_init.c.inc | 36 +++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc index e7324e85cd..09c9ae2c98 100644 --- a/target/ppc/translate_init.c.inc +++ b/target/ppc/translate_init.c.inc @@ -567,35 +567,71 @@ static void spr_write_601_ubatl(DisasContext *ctx, int sprn, int gprn) #if !defined(CONFIG_USER_ONLY) static void spr_read_40x_pit(DisasContext *ctx, int gprn, int sprn) { + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_io_start(); + } gen_helper_load_40x_pit(cpu_gpr[gprn], cpu_env); + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_stop_exception(ctx); + } } static void spr_write_40x_pit(DisasContext *ctx, int sprn, int gprn) { + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_io_start(); + } gen_helper_store_40x_pit(cpu_env, cpu_gpr[gprn]); + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_stop_exception(ctx); + } } static void spr_write_40x_dbcr0(DisasContext *ctx, int sprn, int gprn) { + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_io_start(); + } gen_store_spr(sprn, cpu_gpr[gprn]); gen_helper_store_40x_dbcr0(cpu_env, cpu_gpr[gprn]); /* We must stop translation as we may have rebooted */ gen_stop_exception(ctx); + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_stop_exception(ctx); + } } static void spr_write_40x_sler(DisasContext *ctx, int sprn, int gprn) { + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_io_start(); + } gen_helper_store_40x_sler(cpu_env, cpu_gpr[gprn]); + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_stop_exception(ctx); + } } static void spr_write_booke_tcr(DisasContext *ctx, int sprn, int gprn) { + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_io_start(); + } gen_helper_store_booke_tcr(cpu_env, cpu_gpr[gprn]); + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_stop_exception(ctx); + } } static void spr_write_booke_tsr(DisasContext *ctx, int sprn, int gprn) { + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_io_start(); + } gen_helper_store_booke_tsr(cpu_env, cpu_gpr[gprn]); + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_stop_exception(ctx); + } } #endif