From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 1A1D4A0613 for ; Wed, 25 Sep 2019 11:34:33 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 87BF21BEFE; Wed, 25 Sep 2019 11:33:16 +0200 (CEST) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id CE3171BEB1 for ; Wed, 25 Sep 2019 11:33:00 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Sep 2019 02:32:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,547,1559545200"; d="scan'208";a="213986301" Received: from npg-dpdk-virtual-marvin-dev.sh.intel.com ([10.67.119.142]) by fmsmga004.fm.intel.com with ESMTP; 25 Sep 2019 02:32:48 -0700 From: Marvin Liu To: maxime.coquelin@redhat.com, tiwei.bie@intel.com, zhihong.wang@intel.com, stephen@networkplumber.org, gavin.hu@arm.com Cc: dev@dpdk.org, Marvin Liu Date: Thu, 26 Sep 2019 01:13:27 +0800 Message-Id: <20190925171329.63734-14-yong.liu@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190925171329.63734-1-yong.liu@intel.com> References: <20190919163643.24130-2-yong.liu@intel.com> <20190925171329.63734-1-yong.liu@intel.com> Subject: [dpdk-dev] [PATCH v3 13/15] vhost: cache address translation result X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Cache address translation result and use it in next translation. Due to limited regions are supported, buffers are most likely in same region when doing data transmission. Signed-off-by: Marvin Liu diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h index 7fb172912..d90235cd6 100644 --- a/lib/librte_vhost/rte_vhost.h +++ b/lib/librte_vhost/rte_vhost.h @@ -91,10 +91,18 @@ struct rte_vhost_mem_region { int fd; }; +struct rte_vhost_mem_region_cache { + uint64_t guest_phys_addr; + uint64_t guest_phys_addr_end; + int64_t host_user_addr_offset; + uint64_t size; +}; + /** * Memory structure includes region and mapping information. */ struct rte_vhost_memory { + struct rte_vhost_mem_region_cache cache_region; uint32_t nregions; struct rte_vhost_mem_region regions[]; }; @@ -232,11 +240,30 @@ rte_vhost_va_from_guest_pa(struct rte_vhost_memory *mem, struct rte_vhost_mem_region *r; uint32_t i; + struct rte_vhost_mem_region_cache *r_cache; + /* check with cached region */ + r_cache = &mem->cache_region; + if (likely(gpa >= r_cache->guest_phys_addr && gpa < + r_cache->guest_phys_addr_end)) { + if (unlikely(*len > r_cache->guest_phys_addr_end - gpa)) + *len = r_cache->guest_phys_addr_end - gpa; + + return gpa - r_cache->host_user_addr_offset; + } + + for (i = 0; i < mem->nregions; i++) { r = &mem->regions[i]; if (gpa >= r->guest_phys_addr && gpa < r->guest_phys_addr + r->size) { + r_cache->guest_phys_addr = r->guest_phys_addr; + r_cache->guest_phys_addr_end = r->guest_phys_addr + + r->size; + r_cache->size = r->size; + r_cache->host_user_addr_offset = r->guest_phys_addr - + r->host_user_addr; + if (unlikely(*len > r->guest_phys_addr + r->size - gpa)) *len = r->guest_phys_addr + r->size - gpa; -- 2.17.1