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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 73F29C43381 for ; Thu, 21 Mar 2019 16:53:37 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 436B621917 for ; Thu, 21 Mar 2019 16:53:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="iYh9STo+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 436B621917 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=A7gb0Hek1ZmvWtPk/vcT4aE6UEkFrDTwOfr2jgIqUnw=; b=iYh9STo+84ZT31ncgwvWnmFe69 cRtfuEpC9Pu55Mll2NnWJdoPjEiPwntzVHZoMAfN56qgrtLRYAAVy17I85nrhykw0Qdu7ukd2BlyG OcPZ6bSIwFv8dzR6akR8fudC96Zq3LPqJprmWeaDUlRlVwv2pUrhJAmIRC6MXs65iZYPHq+xNAstr GzQNVBye+P2LSy/Ue4W2Te5R6GwuxS9wrxHiwWMOzZAHj5ig1KEVTL3w5SgyXwjtT6X1wahpEDR04 gBnoY/0f05gzCNp9JJkAiSAPa0JZ8QNp5njpL696maT+7iqy+kX2Ylm7XF8Ft1Ia9rAParqlyxBFb Xd/w+LNA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h70wi-0006aR-2n; Thu, 21 Mar 2019 16:53:36 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h70gj-00085K-7G for linux-arm-kernel@lists.infradead.org; Thu, 21 Mar 2019 16:37:10 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B31B9168F; Thu, 21 Mar 2019 09:37:02 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C36303F614; Thu, 21 Mar 2019 09:37:00 -0700 (PDT) From: Julien Grall To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH RFC 10/14] arm64/mm: Introduce a callback to flush the local context Date: Thu, 21 Mar 2019 16:36:19 +0000 Message-Id: <20190321163623.20219-11-julien.grall@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190321163623.20219-1-julien.grall@arm.com> References: <20190321163623.20219-1-julien.grall@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190321_093705_535503_5D8BDCDE X-CRM114-Status: GOOD ( 13.12 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suzuki.poulose@arm.com, marc.zyngier@arm.com, catalin.marinas@arm.com, julien.thierry@arm.com, will.deacon@arm.com, christoffer.dall@arm.com, Julien Grall , james.morse@arm.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Flushing the local context will vary depending on the actual user of the ASID allocator. Introduce a new callback to flush the local context and move the call to flush local TLB in it. Signed-off-by: Julien Grall --- arch/arm64/mm/context.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c index cbf1c24cb3ee..678a57b77c91 100644 --- a/arch/arm64/mm/context.c +++ b/arch/arm64/mm/context.c @@ -39,6 +39,8 @@ struct asid_info cpumask_t flush_pending; /* Number of ASID allocated by context (shift value) */ unsigned int ctxt_shift; + /* Callback to locally flush the context. */ + void (*flush_cpu_ctxt_cb)(void); } asid_info; #define active_asid(info, cpu) *per_cpu_ptr((info)->active, cpu) @@ -266,7 +268,7 @@ static void asid_new_context(struct asid_info *info, atomic64_t *pasid, } if (cpumask_test_and_clear_cpu(cpu, &info->flush_pending)) - local_flush_tlb_all(); + info->flush_cpu_ctxt_cb(); atomic64_set(&active_asid(info, cpu), asid); raw_spin_unlock_irqrestore(&info->lock, flags); @@ -298,6 +300,11 @@ asmlinkage void post_ttbr_update_workaround(void) CONFIG_CAVIUM_ERRATUM_27456)); } +static void asid_flush_cpu_ctxt(void) +{ + local_flush_tlb_all(); +} + /* * Initialize the ASID allocator * @@ -308,10 +315,12 @@ asmlinkage void post_ttbr_update_workaround(void) * 2. */ static int asid_allocator_init(struct asid_info *info, - u32 bits, unsigned int asid_per_ctxt) + u32 bits, unsigned int asid_per_ctxt, + void (*flush_cpu_ctxt_cb)(void)) { info->bits = bits; info->ctxt_shift = ilog2(asid_per_ctxt); + info->flush_cpu_ctxt_cb = flush_cpu_ctxt_cb; /* * Expect allocation after rollover to fail if we don't have at least * one more ASID than CPUs. ASID #0 is always reserved. @@ -332,7 +341,8 @@ static int asids_init(void) { u32 bits = get_cpu_asid_bits(); - if (!asid_allocator_init(&asid_info, bits, ASID_PER_CONTEXT)) + if (!asid_allocator_init(&asid_info, bits, ASID_PER_CONTEXT, + asid_flush_cpu_ctxt)) panic("Unable to initialize ASID allocator for %lu ASIDs\n", 1UL << bits); -- 2.11.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel