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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 53F96C77B7F for ; Tue, 24 Jun 2025 21:11:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=7VdJsNFrla8jF+nWT+6I6+vor4A3ZQlYDm2IiapyjTI=; b=KmWeSeInRbxylnssnVBXpfALGy tQ39f6ZDnXzFTvaxl/BD5Bjsg/S1VjxZrbsOReqzdPPmlB807v8mlefrcurXJIFuRiPEbZtwgMQnQ ghGcZSzTa69ij+OTmJx+CgMVOmj7hOaiBhaHKvj4eZzWIhmtsTXjxi4I2AH0I00CYjKs2rlQcmG7x 0b5WUJ6luT2i74TS3D3BoK9J17RykGlKIeSwxPlxXFd0RzG5Apet4JzMJin1YFanOA/iJzhXB5Hh3 kqB/tlFNzgSJUHbgT8YxUciymjPYizqAAowH2OPAaI2jTbUZQv1QFlW+Cej9XiXDYtyNht1JxbK+S Yq/vUchg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uUAuu-00000006qTn-0kio; Tue, 24 Jun 2025 21:10:56 +0000 Received: from frasgout.his.huawei.com ([185.176.79.56]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uU5t1-00000006BLY-3ZRi for linux-arm-kernel@lists.infradead.org; Tue, 24 Jun 2025 15:48:41 +0000 Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4bRTqZ0CdXz6GDts; Tue, 24 Jun 2025 23:47:54 +0800 (CST) Received: from frapeml500008.china.huawei.com (unknown [7.182.85.71]) by mail.maildlp.com (Postfix) with ESMTPS id 6251F1400CA; Tue, 24 Jun 2025 23:48:38 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.19.247) by frapeml500008.china.huawei.com (7.182.85.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Tue, 24 Jun 2025 17:48:37 +0200 From: Jonathan Cameron To: Catalin Marinas , , , , , , , , Will Deacon , Dan Williams , Davidlohr Bueso CC: Yicong Yang , , Yushan Wang , Lorenzo Pieralisi , Mark Rutland , Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , , H Peter Anvin , Andy Lutomirski , Peter Zijlstra Subject: [PATCH v2 1/8] memregion: Support fine grained invalidate by cpu_cache_invalidate_memregion() Date: Tue, 24 Jun 2025 16:47:57 +0100 Message-ID: <20250624154805.66985-2-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250624154805.66985-1-Jonathan.Cameron@huawei.com> References: <20250624154805.66985-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.122.19.247] X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To frapeml500008.china.huawei.com (7.182.85.71) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250624_084840_176362_A158A24F X-CRM114-Status: GOOD ( 15.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Yicong Yang Extend cpu_cache_invalidate_memregion() to support invalidate certain range of memory. Control of types of invlidation is left for when usecases turn up. For now everything is Clean and Invalidate. Signed-off-by: Yicong Yang Signed-off-by: Jonathan Cameron --- arch/x86/mm/pat/set_memory.c | 2 +- drivers/cxl/core/region.c | 6 +++++- drivers/nvdimm/region.c | 3 ++- drivers/nvdimm/region_devs.c | 3 ++- include/linux/memregion.h | 8 ++++++-- 5 files changed, 16 insertions(+), 6 deletions(-) diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index 46edc11726b7..8b39aad22458 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -368,7 +368,7 @@ bool cpu_cache_has_invalidate_memregion(void) } EXPORT_SYMBOL_NS_GPL(cpu_cache_has_invalidate_memregion, "DEVMEM"); -int cpu_cache_invalidate_memregion(int res_desc) +int cpu_cache_invalidate_memregion(int res_desc, phys_addr_t start, size_t len) { if (WARN_ON_ONCE(!cpu_cache_has_invalidate_memregion())) return -ENXIO; diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 6e5e1460068d..6e6e8ace0897 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -237,7 +237,11 @@ static int cxl_region_invalidate_memregion(struct cxl_region *cxlr) return -ENXIO; } - cpu_cache_invalidate_memregion(IORES_DESC_CXL); + if (!cxlr->params.res) + return -ENXIO; + cpu_cache_invalidate_memregion(IORES_DESC_CXL, + cxlr->params.res->start, + resource_size(cxlr->params.res)); return 0; } diff --git a/drivers/nvdimm/region.c b/drivers/nvdimm/region.c index 88dc062af5f8..033e40f4dc52 100644 --- a/drivers/nvdimm/region.c +++ b/drivers/nvdimm/region.c @@ -110,7 +110,8 @@ static void nd_region_remove(struct device *dev) * here is ok. */ if (cpu_cache_has_invalidate_memregion()) - cpu_cache_invalidate_memregion(IORES_DESC_PERSISTENT_MEMORY); + cpu_cache_invalidate_memregion(IORES_DESC_PERSISTENT_MEMORY, + 0, -1); } static int child_notify(struct device *dev, void *data) diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index de1ee5ebc851..7e93766065d1 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -90,7 +90,8 @@ static int nd_region_invalidate_memregion(struct nd_region *nd_region) } } - cpu_cache_invalidate_memregion(IORES_DESC_PERSISTENT_MEMORY); + cpu_cache_invalidate_memregion(IORES_DESC_PERSISTENT_MEMORY, + 0, -1); out: for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; diff --git a/include/linux/memregion.h b/include/linux/memregion.h index c01321467789..91d088ee3695 100644 --- a/include/linux/memregion.h +++ b/include/linux/memregion.h @@ -28,6 +28,9 @@ static inline void memregion_free(int id) * cpu_cache_invalidate_memregion - drop any CPU cached data for * memregions described by @res_desc * @res_desc: one of the IORES_DESC_* types + * @start: start physical address of the target memory region. + * @len: length of the target memory region. -1 for all the regions of + * the target type. * * Perform cache maintenance after a memory event / operation that * changes the contents of physical memory in a cache-incoherent manner. @@ -46,7 +49,7 @@ static inline void memregion_free(int id) * the cache maintenance. */ #ifdef CONFIG_ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION -int cpu_cache_invalidate_memregion(int res_desc); +int cpu_cache_invalidate_memregion(int res_desc, phys_addr_t start, size_t len); bool cpu_cache_has_invalidate_memregion(void); #else static inline bool cpu_cache_has_invalidate_memregion(void) @@ -54,7 +57,8 @@ static inline bool cpu_cache_has_invalidate_memregion(void) return false; } -static inline int cpu_cache_invalidate_memregion(int res_desc) +static inline int cpu_cache_invalidate_memregion(int res_desc, + phys_addr_t start, size_t len) { WARN_ON_ONCE("CPU cache invalidation required"); return -ENXIO; -- 2.48.1