From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.7 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 4C97AC04A6B for ; Wed, 8 May 2019 17:39:46 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 173EB216C4 for ; Wed, 8 May 2019 17:39:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=fintelia.io header.i=@fintelia.io header.b="JzJRyCRh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 173EB216C4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=fintelia.io Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([127.0.0.1]:40933 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hOQXh-0008DS-BD for qemu-devel@archiver.kernel.org; Wed, 08 May 2019 13:39:45 -0400 Received: from eggs.gnu.org ([209.51.188.92]:41944) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hOQWu-0007wM-3R for qemu-devel@nongnu.org; Wed, 08 May 2019 13:38:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hOQWs-0007cK-28 for qemu-devel@nongnu.org; Wed, 08 May 2019 13:38:56 -0400 Received: from rs224.mailgun.us ([209.61.151.224]:49328) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hOQWp-0007Zg-3N for qemu-devel@nongnu.org; Wed, 08 May 2019 13:38:52 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=fintelia.io; q=dns/txt; s=pic; t=1557337127; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=YvsWYTSVQUmO5f5aefREeZm0X5cwenQtMoPL4ghpEhc=; b=JzJRyCRhJ4HtM2dzbt/9FxoUHyNic/WG+U/sfRXeCdhRfby6p/xAMVmL0sOs27jV2B7bThUu +rJpc5dXoLrFMCThPBXlCU70entsk5aHyOehNOa4OBvlle7B94QMNhpoRNPeGF2zTwycVmhZ fITARLRkE4X7QeyYYMigx8EVkn1d+AtH1QlCVyxpQnAk8o1In8yTqxIPKHaminDkDAYDNWbr uIjWGFQvm26EBRR91Q36wlcZAIkivT3C3CvcgUFyC9FyuYndYvhHRdHRyTa3RVUV+xp71w46 OQZHr/rIB+RrjbwDTzgTsyLf3qbFV73I81UoDFvbyEI6hJ5thbKtVg== X-Mailgun-Sending-Ip: 209.61.151.224 X-Mailgun-Sid: WyJlMGM5NSIsICJxZW11LWRldmVsQG5vbmdudS5vcmciLCAiOWI0ZTc2Il0= Received: from jonathan-ThinkPad-X1-Carbon.csail.mit.edu (30-9-187.wireless.csail.mit.edu [128.30.9.187]) by mxa.mailgun.org with ESMTP id 5cd31425.7fe2f866d350-smtp-out-n02; Wed, 08 May 2019 17:38:45 -0000 (UTC) From: Jonathan Behrens To: qemu-devel@nongnu.org Date: Wed, 8 May 2019 13:38:35 -0400 Message-Id: <20190508173835.14528-1-jonathan@fintelia.io> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.61.151.224 Subject: [Qemu-devel] [PATCH] target/riscv: Only flush TLB if SATP.ASID changes X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jonathan Behrens , Palmer Dabbelt , qemu-riscv@nongnu.org, Jonathan Behrens , Sagar Karandikar Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" There is an analogous change for ARM here: https://patchwork.kernel.org/patch/10649857 Signed-off-by: Jonathan Behrens --- target/riscv/csr.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index 6083c782a1..1ec1222da1 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -732,7 +732,9 @@ static int write_satp(CPURISCVState *env, int csrno, target_ulong val) if (env->priv == PRV_S && get_field(env->mstatus, MSTATUS_TVM)) { return -1; } else { - tlb_flush(CPU(riscv_env_get_cpu(env))); + if((val ^ env->satp) & SATP_ASID) { + tlb_flush(CPU(riscv_env_get_cpu(env))); + } env->satp = val; } } -- 2.20.1