From patchwork Fri Mar 4 17:46:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marco Solieri X-Patchwork-Id: 12769747 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5964FC433F5 for ; Fri, 4 Mar 2022 18:17:22 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.284429.483786 (Exim 4.92) (envelope-from ) id 1nQCUH-0005Fn-Ot; Fri, 04 Mar 2022 18:17:09 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 284429.483786; Fri, 04 Mar 2022 18:17:09 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nQCUF-00056s-Ut; Fri, 04 Mar 2022 18:17:07 +0000 Received: by outflank-mailman (input) for mailman id 284429; Fri, 04 Mar 2022 17:48:06 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nQC2A-0005R4-Aw for xen-devel@lists.xenproject.org; Fri, 04 Mar 2022 17:48:06 +0000 Received: from radon.xt3.it (radon.xt3.it [2a01:4f8:190:4055::2]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 3ec47c14-9be3-11ec-8eba-a37418f5ba1a; Fri, 04 Mar 2022 18:48:05 +0100 (CET) Received: from nb2assolieri.mat.unimo.it ([155.185.4.56] helo=localhost) by radon.xt3.it with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1nQC29-0008V5-3U; Fri, 04 Mar 2022 18:48:05 +0100 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 3ec47c14-9be3-11ec-8eba-a37418f5ba1a From: Marco Solieri To: xen-devel@lists.xenproject.org Cc: Marco Solieri , Andrew Cooper , George Dunlap , Jan Beulich , Julien Grall , Stefano Stabellini , Wei Liu , Marco Solieri , Andrea Bastoni , Luca Miccio Subject: [PATCH 16/36] xen/color alloc: implement color_from_page for ARM64 Date: Fri, 4 Mar 2022 18:46:41 +0100 Message-Id: <20220304174701.1453977-17-marco.solieri@minervasys.tech> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220304174701.1453977-1-marco.solieri@minervasys.tech> References: <20220304174701.1453977-1-marco.solieri@minervasys.tech> MIME-Version: 1.0 From: Luca Miccio The colored allocator should not make any assumptions on how a color is defined, since the definition may change depending on the architecture. Use a generic function "color_from_page" that returns the color id based on the page address. Add a definition for ARMv8 architectures. Signed-off-by: Luca Miccio Signed-off-by: Marco Solieri --- xen/arch/arm/coloring.c | 13 +++++++++++++ xen/arch/arm/include/asm/coloring.h | 7 +++++++ 2 files changed, 20 insertions(+) diff --git a/xen/arch/arm/coloring.c b/xen/arch/arm/coloring.c index 8061c3824f..4748d717d6 100644 --- a/xen/arch/arm/coloring.c +++ b/xen/arch/arm/coloring.c @@ -196,6 +196,19 @@ bool check_domain_colors(struct domain *d) return !ret; } +/* + * Compute color id from the page @param pg. + * Page size determines the lowest available bit, while add_col_mask is used to + * select the rest. + * + * @param pg Page address + * @return unsigned long Color id + */ +unsigned long color_from_page(struct page_info *pg) +{ + return ((addr_col_mask & page_to_maddr(pg)) >> PAGE_SHIFT); +} + bool __init coloring_init(void) { int i; diff --git a/xen/arch/arm/include/asm/coloring.h b/xen/arch/arm/include/asm/coloring.h index 8609e17e80..318e2a4521 100644 --- a/xen/arch/arm/include/asm/coloring.h +++ b/xen/arch/arm/include/asm/coloring.h @@ -42,6 +42,13 @@ bool check_domain_colors(struct domain *d); uint32_t *setup_default_colors(uint32_t *col_num); void coloring_dump_info(struct domain *d); + +/* + * Compute the color of the given page address. + * This function should change depending on the cache architecture + * specifications. + */ +unsigned long color_from_page(struct page_info *pg); #else /* !CONFIG_COLORING */ static inline bool __init coloring_init(void) {