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=-16.8 required=3.0 tests=BAYES_00, 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 09C94C433ED for ; Thu, 15 Apr 2021 11:50:56 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 603CB613B6 for ; Thu, 15 Apr 2021 11:50:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 603CB613B6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 0D8424B6A5; Thu, 15 Apr 2021 07:50:55 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0Vjb2WG46esp; Thu, 15 Apr 2021 07:50:54 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 7C1C94B721; Thu, 15 Apr 2021 07:50:51 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 98D3A4B6C6 for ; Thu, 15 Apr 2021 07:50:50 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TI7R5n4JIGBy for ; Thu, 15 Apr 2021 07:50:49 -0400 (EDT) Received: from szxga07-in.huawei.com (szxga07-in.huawei.com [45.249.212.35]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 542BA4B6A5 for ; Thu, 15 Apr 2021 07:50:49 -0400 (EDT) Received: from DGGEMS407-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4FLczw63WhzB10g; Thu, 15 Apr 2021 19:48:28 +0800 (CST) Received: from DESKTOP-TMVL5KK.china.huawei.com (10.174.187.128) by DGGEMS407-HUB.china.huawei.com (10.3.19.207) with Microsoft SMTP Server id 14.3.498.0; Thu, 15 Apr 2021 19:50:38 +0800 From: Yanan Wang To: Marc Zyngier , Will Deacon , "Quentin Perret" , Alexandru Elisei , , , , Subject: [PATCH v5 4/6] KVM: arm64: Provide invalidate_icache_range at non-VHE EL2 Date: Thu, 15 Apr 2021 19:50:30 +0800 Message-ID: <20210415115032.35760-5-wangyanan55@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20210415115032.35760-1-wangyanan55@huawei.com> References: <20210415115032.35760-1-wangyanan55@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.128] X-CFilter-Loop: Reflected Cc: Catalin Marinas X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu We want to move I-cache maintenance for the guest to the stage-2 page table code for performance improvement. Before it can work, we should first make function invalidate_icache_range available to non-VHE EL2 to avoid compiling or program running error, as pgtable.c is now linked into the non-VHE EL2 code for pKVM mode. In this patch, we only introduce symbol of invalidate_icache_range with no real functionality in nvhe/cache.S, because there haven't been situations found currently where I-cache maintenance is also needed in non-VHE EL2 for pKVM mode. Signed-off-by: Yanan Wang --- arch/arm64/kvm/hyp/nvhe/cache.S | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/cache.S b/arch/arm64/kvm/hyp/nvhe/cache.S index 36cef6915428..a125ec9aeed2 100644 --- a/arch/arm64/kvm/hyp/nvhe/cache.S +++ b/arch/arm64/kvm/hyp/nvhe/cache.S @@ -11,3 +11,14 @@ SYM_FUNC_START_PI(__flush_dcache_area) dcache_by_line_op civac, sy, x0, x1, x2, x3 ret SYM_FUNC_END_PI(__flush_dcache_area) + +/* + * invalidate_icache_range(start,end) + * + * Ensure that the I cache is invalid within specified region. + * + * - start - virtual start address of region + * - end - virtual end address of region + */ +SYM_FUNC_START(invalidate_icache_range) +SYM_FUNC_END(invalidate_icache_range) -- 2.23.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm